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Engineering zeolitic imidazolate framework-8 nanoparticles for smart drug delivery systems Nano Express Pub Date : 2024-02-13 Cuixiu Wu, Wanyuan Huang, Fengyi Du, Miaomiao Zhang, Hanliang Qian
Zeolitic imidazolate framework-8 nanoparticles (ZIF-8 NPs) are emerging metal–organic framework nanomaterials composed of 2-methylimidazole and zinc ions, which are widely used in biomedical fields due to their distinctive features such as high porosity, bioresponsive degradation, and superior biocompatibility. Especially, the advanced research of ZIF-8 NPs in smart drug delivery systems is providing
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The optimization of gold nanoparticles–horseradish peroxidase as peroxidase mimic using central composite design for the detection of hydrogen peroxide Nano Express Pub Date : 2024-02-12 Natchanok Talapphet, Chang Soon Huh
The oxidizing agent, hydrogen peroxide (H2O2), which is a part of reactive oxygen species (ROS) is well-known to contribute to oxidative stress-induced damage to biological molecules. An excess of free radicals can harm health and is associated with human diseases. Gold nanotechnology, a highly relevant nanomaterial, has been utilized as a new material in advanced sensor detection. In this study, colorimetric
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Structural and antibacterial properties of copper oxide nanoparticles: a study on the effect of calcination temperature Nano Express Pub Date : 2024-02-09 Sarah Constance Motshekga
Nanoparticles of copper oxide were synthesized by the simple precipitation method. The influence of calcination temperature on the structural characteristics and antibacterial activity of the nanoparticles were evaluated. The nanoparticles were analyzed by Bruner-Emmett-Teller (BET) surface area and pore size analyzer, x-ray diffraction, transmission electron microscope and scanning electron microscope
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Nanoscale dielectric properties of TiO2 in SiO2 nanocomposite deposited by hybrid PECVD method Nano Express Pub Date : 2024-02-07 C Villeneuve-Faure, M Mitronika, A P Dan, L Boudou, W Ravisy, M P Besland, M Richard-Plouet, A Goullet
In this paper, nanocomposites (TiO2 in SiO2) are produced by an advanced hybrid aerosol-PECVD method based on direct liquid injection of a non-commercial colloidal solution in an O2 / hexamethyldisiloxane (HMDSO) low-pressure plasma. Dielectric properties are investigated at nanoscale using techniques derived from Atomic Force Microcopy in terms of relative dielectric permittivity, charge injection
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Black ZnO nanoparticles synthesized by a green chemistry process Nano Express Pub Date : 2024-01-23 J León-Flores, E Melo-Uscanga, J L Pérez-Mazariego, M Marquina, C Reyes-Damián, R Escamilla, R Gómez, J Arenas-Alatorre
In the present work, the standardization of the methodology to obtain black ZnO nanoparticles from Arabica coffee extract as a reducer agent and stabilizer of the reaction is presented for the first time through a scalable combustion green chemistry process without obtaining dangerous byproducts. The size distribution of the nanoparticles was found between 15 and 30 nm. High-resolution transmission
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Niosomes modified with a novel pH-responsive coating (mPEG-OA) enhance the antibacterial and anti-biofilm activity of vancomycin against methicillin-resistant Staphylococcus aureus Nano Express Pub Date : 2024-01-23 Nawras Osman, Calvin A Omolo, Mohammed A Gafar, Nikita Devnarain, Sanjeev Rambharose, Usri H Ibrahim, Victoria O Fasiku, Thirumala Govender
Surface functionalization of nanoparticles has shown potential in enhancing the efficacy of antibiotic-loaded nanosystems against drug-resistant bacteria. The objective of this study was to synthesize and characterize an acid-cleavable pH-responsive polymer from methoxy polyethylene glycol and oleylamine (mPEG-OA) to surface modify vancomycin (VCM)-loaded niosomes and to evaluate their antibacterial
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Structural, optical and magnetic properties of Cu doped CeO2 nano powders synthesized by solid state reaction Nano Express Pub Date : 2024-01-17 G Chinna Venkata Subbaiah, Madhusudhana Rao N
In this research work, the structural, optical, and magnetic properties of Ce1−xCuxO nanoparticles have been reported. Solid state reaction technique was employed to synthesize the nanoparticle samples. The synthesized materials were analysed structural properties from x-ray diffraction (XRD) observed that the crystallite size increased from16.9 nm to 40.43 nm and the lattice constant increased with
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Plant-based carbon dots are a sustainable alternative to conventional nanomaterials for biomedical and sensing applications Nano Express Pub Date : 2024-01-04 Shanmuga Priya S, Suseem S R
Carbon dots are small carbon-based particles with unique properties that make them useful in various applications. Some advantages include low toxicity, bio-compatibility, excellent photo luminescence, high stability, and ease of synthesis. These features make them promising for biomedical imaging, drug delivery, and optoelectronic devices. Carbon dots derived from plants have several advantages, including
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Fabrication of Sb2S3/Sb2Se3 heterostructure for potential resistive switching applications Nano Express Pub Date : 2024-01-03 Pukhraj Prajapat, Pargam Vashishtha, Preeti Goswami, Govind Gupta
The exponential growth of large data and the widespread adoption of the Internet of Things (IoT) have created significant challenges for traditional Von Neumann computers. These challenges include complex hardware, high energy consumption, and slow memory access time. Researchers are investigating novel materials and device architectures to address these issues by reducing energy consumption, improving
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MoS2 thin film decorated TiO2 nanotube arrays on flexible Ti foil for solar water splitting application Nano Express Pub Date : 2024-01-03 Bheem Singh, Sudhanshu Gautam, Govinda Chandra Behera, Rahul Kumar, Vishnu Aggarwal, Jai Shankar Tawale, Ramakrishnan Ganesan, Somnath Chanda Roy, Sunil Singh Kushvaha
MoS2/TiO2 nanostructure provides a lot of advantages in photoelectrochemical (PEC) applications due to the absorption of the wide spectrum solar radiation, more catalytically active sites, proper band alignment, and better separation of photogenerated charge carriers. Here we report PEC water splitting studies of MoS2 thin film grown by chemical vapor deposition on TiO2 nanotubes fabricated on flexible
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Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms Nano Express Pub Date : 2024-01-03 Qian Yun Sun, Jin Xin Cheng, Si Yu Qi, Jin Feng Chen, Ding Yu Hu
Functionalized carbon quantum dots (CQDs) show great potential for application in the field of food safety. CQDs have attracted widespread attention in this regard due to the wide range of sources of raw materials for their synthesis, and their good biocompatibility and stable fluorescence. This paper analyses the properties of CQDs and compares with those of conventional semiconductor quantum dots
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SWCNT-Si photodetector with voltage-dependent active surface Nano Express Pub Date : 2023-12-22 Daniele Capista, Luca Lozzi, Antonio Di Bartolomeo, Filippo Giubileo, Nadia Martucciello, Maurizio Passacantando
New works on Carbon Nanotubes-Silicon MIS heterostructures showed that the presence of thickness inhomogeneities in the insulating layer across the device can be exploited to increase their functionalities. In this work, we report the fabrication and characterization of a device consisting of a Single-Walled Carbon Nanotube (SWCNT) film onto an n-type silicon substrate where the nitride interlayer
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A stable undoped low-voltage memristor cell based on Titania (TiOx) Nano Express Pub Date : 2023-12-22 Fateh Ullah, Mahdi Tarkhan, Zina Fredj, Yi Su, Tianjun Wang, Mohamad Sawan
An asymmetric memristive device fabricated with a titania (TiOx)-based switching layer deposited through atomic layer deposition with a thickness of ∼37 nm was investigated. X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy coupled with energy-dispersive x-ray spectroscopy were employed for device structural characterization. A unipolar resistive switching behavior
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Insights into the interface during ice adhesion measurements Nano Express Pub Date : 2023-12-20 Sabine Apelt, Ute Bergmann
When evaluating published results from ice adhesion measurements to characterise the applicability of surface coatings, there is usually a large variation of the published properties and a high scattering of these values. Moreover ice adhesion is known as a highly susceptible parameter regarding the measurement temperature which additionally leads to deviations. This paper is a contribution to the
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Impact of surfactant-assisted synthesis on the structural, optical, and dielectric characteristics of ZnO nanoparticles Nano Express Pub Date : 2023-12-20 Deepak Kumar, Rajveer Singh, Meenakshi Gautam
In this study, the enhancement of ZnO’s dielectric properties is pursued through the manipulation of its particle size using a surfactant-based approach. The synthesis of ZnO nanoparticles with the aid of surfactants is achieved through the sol–gel method. Through x-ray diffraction analysis, the formation of the desired Wurtzite structure is confirmed, with no secondary phases detected. The surface
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Achieving enhanced tensile properties of polyurethane-multiwall carbon nanotubes nanocomposites Nano Express Pub Date : 2023-12-08 Ghulam Abbas Gohar, Awais Akhtar, Hassan Raza, Ghulam Mustafa, Mahreen Fatima, Habib Ur Rehman, Muhammad Waqas Aslam, Abrar ul Haq, Waqar Manzoor
Polymeric nanocomposites have emerged as a promising class of materials with improved strength, stiffness, and toughness compared to pure polymers. The incorporation of nanoparticles into polymer matrices, such as carbon nanotubes, graphene, clay nanoparticles, and metal oxides, has shown considerable potential for enhancing the properties of the produced nanocomposites. Herein, the influence of filtered
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Bimetallic nanoparticles green synthesis from litchi leaf extract: a promising approach for breast cancer treatment Nano Express Pub Date : 2023-12-08 Ramanjeet Kaur, Jitender Singh, Pramod K Avti, Vivek Kumar, Rajesh Kumar
Noble metal nanoparticles have demonstrated promising biomedical and nanomedicine applications, and their bimetallic equivalents from the green synthesis approach are expected to be more promising. This study concerns bimetallic nanoparticle’s synthesis, characterization, and structure-function analysis for their potential application in breast cancer. Silver core (SCNPs) and Gold core (GCNPs) bimetallic
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Anti-cancer and neuroprotective effects of conjugated graphene quantum dot in brain tumor-bearing rat model Nano Express Pub Date : 2023-12-07 Vimal Patel, Jigar Shah
Glioblastoma has been recognized as a most complex and highly malignant type of primary brain tumor. The rapid progression brain tumor model was developed by direct intracranial administration of ENU at the different focal brain points in the rat brains. The GQD was synthesized by bottom-up technique and functionalized with Trastuzumab and Caspase-8 antibody by Carbodiimide-amidation activation. The
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Selective fluoride ion sensing in aqueous medium using ultrathin film of functionalized single-walled carbon nanotubes Nano Express Pub Date : 2023-12-07 Parul Taneja, V Manjuladevi, R K Gupta, K K Gupta
The presence of fluoride ion (F - ) in potable water above its permissible limit (1–4 ppm) poses serious health hazards. Hence, detection of fluoride in potable water is essential. The π-electron rich single-walled carbon nanotubes can interact with F- to form semi-covalent C-F bond which can act as a basis for F - sensing in aqueous medium. Here, a single layer of octadecylamine functionalized single-walled
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Transition metal (Ni,Mn) codoped Zn3P2 nanoparticles: effect on structural, optical and magnetic properties Nano Express Pub Date : 2023-12-06 Nakka Praveenkumar, Nasina Madhusudhana Rao
This work reports the pure matrix and synthesis of Zn(3–(x+y))NixMnyP2 (x = 0.02, y = 0.01, 0.03, 0.05, and 0.07) nanoparticles using the solid-state reaction method. The impact of Ni-Mn codoping on the structural, morphological, chemical identification, optical, photoluminescence, and magnetic properties of Zn3P2 nanoparticles is studied. The structural properties after doping confirm the absence
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Optimization of visible photoluminescence emission from Ni-Zn ferrite thin films Nano Express Pub Date : 2023-12-06 A M Faramawy, H M El-Sayed
Ni-Zn ferrite films with different thicknesses were prepared by the spray method, aiming to study the relationship between the annealing effect in an oxygen rich environment and the structural, optical properties and photoluminescence emission. X-ray diffraction (XRD) analysis used with Rietveld refinement showed that all prepared samples had a single spinel phase structure. Likewise, the Fourier transform
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Modelling the magnetization data of Fe3O4 nanoparticles above blocking temperature Nano Express Pub Date : 2023-12-06 Navneet Kaur
Nanoparticles of Fe3O4 are prepared by simple co-precipitation method. The sample is characterized using an x-ray diffractometer, transmission electron microscope, and vibrating sample magnetometer. The x-ray diffraction pattern of the sample clearly shows that it is a single-phase magnetite. The transmission electron micrograph shows that the sample has a narrow distribution in particle size with
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Structural and electronic properties of novel BeN4/MgN4 nanoribbons Nano Express Pub Date : 2023-11-10 L Ponvijayakanthan, Neeraj K Jaiswal, Haranath Ghosh
Nanostructures of novel materials are capable of altering the properties of materials quite drastically. Recently discovered Dirac monolayer BeN4 has drawn much attention since this Nitrogen-based material’s electronic structure is very similar to graphene. In this work, we have analyzed various possiblities of nanoribbons structures of MN4 (M=Be, Mg) monolayer materials. We have proposed several possible
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Low temperature synthesis of BiNi0.6Mn0.4O3 nanostructures via citric acid and ethylene glycol assisted hydrothermal process for energy storage applications Nano Express Pub Date : 2023-11-08 Deeksha Nagpal, Anup Singh, Ajay Vasishth, Manju Devi, Ved Prakash Nayyar, Bhagwat Prasad Maurya, Ashok Kumar
Present study reports the electrochemical behavior of BiNi0.6Mn0.4O3 nanostructures synthesized via citric acid and ethylene glycol assisted hydrothermal process at low temperature calcination of 400oC. Raman spectroscopy and Rietveld refinement have confirmed BiNi0.6Mn0.4O3 to crystallize in tetragonal phase with P4̅ 21c space group symmetry. X-ray photoelectron spectroscopic analysis showed the presence
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Printable metal oxide nanostructures based chemiresistive non-biological analyte sensors Nano Express Pub Date : 2023-11-07 Amit Kumar, Sang Sub Kim, Hyoun Woo Kim, Mahesh Kumar
Non-biological analyte sensing refers to the ability to detect and quantify various chemical and physical parameters present in the environment or biological samples that are not directly associated with biological entities such as cells, tissues, or organisms. The field of non-biological analyte sensing has its roots in the early detection of any analytes, and over the years, it has expanded to include
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Microwave assisted synthesis for ϵ-MnO2 nanostructures on Ni foam as for rechargeable Li–O2 battery applications Nano Express Pub Date : 2023-11-07 R Prasada Rao, B Ramasubramanian, R Saritha, S Ramakrishna
Lithium-air batteries exhibits high practical energy densities ranging from 1000 to 4000 Wh Kg−1, rendering them appealing for applications in portable electronic devices and electric vehicles. Nevertheless, they grapple with challenges like low charge–discharge efficiency, limited stability over multiple cycles, and electrode degradation stemming from undesirable side reactions, thus impeding their
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Structural, morphological, optical and biomedical applications of Berberis aristata mediated ZnO and Ag-ZnO nanoparticles Nano Express Pub Date : 2023-11-06 Deepak Sharma, Ankush Chauhan, Ritesh Verma, Swati kumari, Pankaj Thakur, Ambrish K Mahajan, Vinod Kumar, Mamta Sharma
Herein, we prepared the zinc oxide (ZnO) and silver doped zinc oxide (Ag-ZnO) nanoparticles (NPs) using Berberis aristata plant extract as a reducing, capping and stabilizing agent. The x-ray diffraction (XRD) pattern confirms the formation of pure hexagonal wurtzite structure for both the samples with P4mm space group. The crystallite size reduces from 21.313 nm to 18.179 nm with the Scherrer technique
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Revolutionizing energy storage: the emergence of MOF/MXene composites as promising supercapacitors Nano Express Pub Date : 2023-10-30 Negin Khosroshahi, Mahnaz Bakhtian, Ali Asadi, Vahid Safarifard
As the world becomes increasingly concerned with environmental preservation and the effects of fossil fuel consumption, it is essential to find new and innovative ways of providing energy. Supercapacitors are among the most promising devices for energy storage. Finding materials that can enhance their efficiency is still a major challenge. Research is currently underway to fabricate composite materials
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Bimetallic copper-based nanowires and the means to create next-generation stable transparent electrodes Nano Express Pub Date : 2023-10-20 Anđela Križan, Kevin Zimny, Alexandre Guyonnet, Emmanuel Opeyemi Idowu, Etienne Duguet, Marie Plissonneau, Lauriane d’Alençon, Thierry Le Mercier, Mona Tréguer-Delapierre
Metallic nanowire percolating networks are one of the promising alternatives to conventional transparent conducting electrodes. Among the conductive metals, copper appears as a relevant alternative to develop electrodes in a more sustainable and economical way (abundance of the supplies, geo-political risks regarding the supplies, environmental impact, and cost). However, Cu nanowires suffer from high
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Magnetic domain structure and magneto-transport properties of laser ablated Co40Fe40B20 thin films Nano Express Pub Date : 2023-10-13 G Venkat Swamy, P K Rout, Himanshu Pandey, B Riscob, G A Basheed
We report the magnetic domain structure, and electrical and magnetoresistance properties of laser ablated Co40Fe40B20 (CoFeB) (6 to 36 nm) thin films deposited on SiO2 / Si(001) substrates. Magnetic force microscopy performed on annealed CoFeB thin films revealed larger magnetic domains, which are formed due to strong exchange coupling between the grains. The temperature-dependent sheet resistance
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A novel approach to the green synthesis of zinc oxide nanorods using Thymus kotschyanus plant extract: effect of ammonium hydroxide and precursor concentration Nano Express Pub Date : 2023-10-13 Peyman K Aspoukeh, Azeez A Barzinjy, Samir M Hamad
This research introduces a pioneering green method for synthesizing zinc oxide nanorods (ZnO NRs) on a glass substrate using Thymus kotschyanus plant extract. The study delves into the intricate effects of ammonium hydroxide and precursor concentrations on the morphology, size, alignment, and crystalline structure of ZnO NRs. Through systematic experimentation, it was found that specific concentrations
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Surfactant-free synthesis and magnetic property evaluation of air-stable cobalt oxide nanostructures Nano Express Pub Date : 2023-09-12 Naveen Joshi, S A Shivashankar, Roger Narayan
We report the synthesis of metastable cobalt oxide (CoO) nanostructures via the low-temperature microwave-assisted solvothermal (MAS) process. An alcoholic solution of cobalt (II) acetylacetonate in a sealed vessel was irradiated with microwaves at a temperature <150 °C and a pressure below 100 psi. As-synthesized powder material was characterized in terms of its structure and morphology. X-ray diffractometry
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On the evaluation of field emission parameters of V2O5 and TiO2 nanostructure cathodes Nano Express Pub Date : 2023-09-12 Abhishek Kumar Singh, Jitendra Kumar
The self-assembled V2O5 and TiO2 nanowires are prepared hydrothermally from vanadium (V) hydroxylamido complex and titanium oxide powder, respectively, and studied for their crystalline phase, morphology, and electron emission characteristics. V2O5 is shown to exhibit an orthorhombic phase with preferential growth of the (010) face along the [010] direction; wire size being diameter 100–400 nm, and
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Viscoelastic relaxation of fibroblasts over stiff polyacrylamide gels by atomic force microscopy Nano Express Pub Date : 2023-09-05 A L D Moura, W V Santos, F D Sousa, R S Freire, C L N de Oliveira, J S de Sousa
Cell viscoelasticity provides mechanistic insights into fundamental biological functions and may be used in many applications. Using atomic force microscopy in time and frequency domains, we find a peculiar behavior in the viscoelastic relaxation of L929 mouse fibroblasts that may help understand how cells perceive and adapt to distinct extracellular environments. They are stiffer when cultured over
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Topology optimization for piezoresistive nanomechanical surface stress sensors in anisotropic 〈111〉 orientations Nano Express Pub Date : 2023-08-31 Chao Zhuang, Kosuke Minami, Kota Shiba, Genki Yoshikawa
Microelectromechanical systems (MEMS)-based piezoresistive nanomechanical sensors are compact sensing platforms widely employed in vapor sensing, environmental monitoring, and biosensing. Despite their extensive utility, their lower sensitivity relative to their optical readout counterparts has been a limiting factor, constraining the wider application of this technology. Prior research has suggested
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Wet etching of gold on graphene for high-quality resist-free graphene surfaces Nano Express Pub Date : 2023-08-29 J Kunc, M Shestopalov, J Jo, K Park
Wet etching of gold on graphene is challenging due to the weak adhesion of the resist mask to graphene. We report an operating procedure for alkali ion-free wet etching of gold on graphene using a mixture of hydrochloric and nitric acids (aqua regia) with a high lateral resolution down to 100 nm. We investigate the role of positive and negative resists, electron beam lithography (EBL) dose, hard-bake
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SERS-based detection of efficient removal of organic dyes using molybdenum dichalcogenide nanostructures Nano Express Pub Date : 2023-08-25 Ruchika Thayil, Sudhir Cherukulappurath
Two-dimensional materials have been popular in recent times owing to their special properties that can lead to several applications. In particular, transition metal dichalcogenides have been reported to be potential candidates for photocatalytic degradation and adsorptive removal of organic pollutants. Molybdenum-based chalcogenides have shown to be very efficient in removing pollutant dyes from aqueous
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Facile preparation of hydroxyl−functionalized mica nanosheets assisted by plasma treatment Nano Express Pub Date : 2023-08-16 Zequan Ye, Yumin Zhang, Xinzhe Xiao, Sheng Liu, Lin Gu
The efficient exfoliation of mica, a naturally layered material, into two-dimensional (2D) nanosheets has received much attention due to its low price, good chemical stability, and better shielding function against UV light. However, fast and simple exfoliation of mica in a large-scale face a great challenge. In this work, we developed a simple and effective method for obtaining OH−functionalized mica
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Isolation and substrate dependence on extracellular vesicle characterisation using atomic force microscopy Nano Express Pub Date : 2023-08-14 Garima Dobhal, Sophie Cottam, Helen Jankowski, Jude Weidenhofer, Renee V Goreham
Extracellular vesicles are nano- to micro-sized structures that carry biomolecules between cells to coordinate cellular activity and communication. Isolation and characterisation must be standardised to better understand the role of extracellular vesicles and how they can be used for disease diagnosis. Here we use atomic force microscopy to determine the physical differences between extracellular vesicles
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Enhanced electrodynamic gating in two-dimensional transistors using ferroelectric capping Nano Express Pub Date : 2023-07-31 Hemendra Nath Jaiswal, Maomao Liu, Simran Shahi, Anthony Cabanillas, Sichen Wei, Yu Fu, Anindita Chakravarty, Asma Ahmed, Joel Muhigirwa, Fei Yao, Huamin Li
Two-dimensional (2D) materials such as semiconductors and ferroelectrics are promising for future energy-efficient logic devices because of their extraordinary electronic properties at atomic thickness. In this work, we investigated a van der Waals heterostructure composited of 2D semiconducting MoS2 and 2D ferroelectric CuInP2S6 (CIPS) and NiPS3. Instead of using 2D ferroelectrics as conventional
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Antibacterial efficacy of surface aluminum oxide nanostructures produced by hot water treatment Nano Express Pub Date : 2023-07-26 Quinshell Smith, Kenneth Burnett, Nawab Ali, John Bush, Tansel Karabacak
This study utilizes a hot water treatment (HWT) method for introducing antibacterial properties to aluminum (Al) surfaces, which has relevance in several industries ranging from food packaging and ventilation systems to biomedical materials. The HWT process can produce a nanostructured oxide layer on a wide range of metallic materials by simply immersing the metal in water at temperatures ranging from
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Zein nanoparticles stabilized by hydrophilic small molecule stabilizer matrine deliver curcumin effectively Nano Express Pub Date : 2023-07-06 Hong Liu, Yongquan Wei, Fu Li, Xiang Wang, Yuxin Chen, Zenghui Huang, Pengyun Liang, Lisheng Wang
Matrine (MAR), a quinolone alkaloid, was employed to augment the stability of zein nanoparticles. The incorporation of MAR into the hydrophobic shell of zein nanoparticles was primarily achieved through hydrogen bonding. Curcumin (CUR), a hydrophobic active substance, was encapsulated in the hydrophobic core of zein/matrine nanoparticles (ZMNPs). The preparation of ZMNPs and curcumin-loaded zein/matrine
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A review of nanomaterials and their applications in oil & petroleum industries Nano Express Pub Date : 2023-06-29 Ayan Roy, Dikshita Kabra, Garima Pareek, Kanak Kumari, Pandali Pratyush Kashyap, Samriddhi Naik, Utkarsh Chadha, Senthil Kumaran Selvaraj
The swiftly growing global economies remain the root cause of the soaring demand for oil and gas to satisfy their excessive energy demands, thus making the oil and gas sector one of the most important industrial sectors. Though renewable energy technologies are the more sustainable option, technological advances are required to make them more accessible to the common people. Therefore, due to the limitation
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Comprehensive mobility study of silicon nanowire transistors using multi-subband models Nano Express Pub Date : 2023-06-20 Cristina Medina-Bailon, Mihail Nedjalkov, Vihar Georgiev, Siegfried Selberherr, Asen Asenov
Spatial confinement is important in advanced More Moore devices, such as nanowire transistors (NWTs), where the basic charge transport properties must be revised beyond the bulk crystal assumptions. This work presents a comprehensive and general overview of the electron mobility in aggressively-scaled Si NWTs in order to demonstrate the effect of quantum confinement on this topic, establishing its
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Effect of silver (Ag) doping on structural, optical and antimicrobial properties of copper oxide (CuO) nanostructures Nano Express Pub Date : 2023-06-19 Sagar Vikal, Yogendra K Gautam, Ashwani Kumar, Ajay Kumar, Neetu Singh, Hempal Singh, Beer Pal Singh
The present report investigates the effect of Ag doping on the structural, optical, and antimicrobial properties of CuO nanoparticles (NPs). CuO NPs were produced at optimized reaction conditions via hydrothermal synthesis. XRD study reveals a decrease in crystallite size with increased in Ag doping (2–6 wt %) in CuO. Ag-doped CuO NPs shows lower band gap values than undoped CuO NPs. FESEM analysis
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Probing switching mechanism of memristor for neuromorphic computing Nano Express Pub Date : 2023-06-02 Zhe Yang, Zirui Zhang, Ce Li, Dongliang Yang, Fei Hui, Linfeng Sun
In recent, neuromorphic computing has been proposed to simulate the human brain system to overcome bottlenecks of the von Neumann architecture. Memristors, considered emerging memory devices, can be used to simulate synapses and neurons, which are the key components of neuromorphic computing systems. To observe the resistive switching (RS) behavior microscopically and probe the local conductive filaments
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Deposition of inverse opal-like TiO2 thin film with enhanced photoelectrochemical activity by a spin-coating combined with a dip-coating method Nano Express Pub Date : 2023-05-15 Kuralay Rustembekkyzy, Anara Molkenova, Marat Kaikanov, Timur Sh Atabaev
TiO2 thin films with an inverse opal-like structure have attracted considerable attention recently owing to their high potential for a range of applications. In this study, we demonstrated the possibility to deposit TiO2 thin films with an inverse opal-like structure from TiO2 nanoparticle-based slurry paste using a conventional spin-coating process. In addition, we also showed that the photoelectrochemical
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Modeling selective narrowband light absorption in coaxial InAs-GaAs0.1Sb0.9 nanowires with partial shell segment coverage Nano Express Pub Date : 2023-05-03 Alireza Abrand, Nicklas Anttu, Parsian K Mohseni
Vertical III-V nanowire (NW) arrays are promising candidates for infrared (IR) photodetection applications. Generally, NWs with large diameters are required for efficient absorption in the IR range. However, increasing the NW diameter results in a loss of spectral selectivity and an enhancement in the photodetector dark current. Here, we propose a nanophotonic engineering approach to achieving spectrally-selective
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Core-shell magnetic molecularly imprinted polymers: nanoparticles targeting selective androgen receptor modulators (sarms) and steroidal models Nano Express Pub Date : 2023-05-02 Mark V Sullivan, Bethanie Dean, Aiden Mates, Maria Elizabeth Farrow, Connor Fletcher, Maddie German, Riya Patel, Nicholas W Turner
Super paramagnetic iron oxide nanoparticles (SPIONs) (∼12 nm) were synthesized as the magnetic core for an imprinted polymer (MIP) shell using 4-vinylpyridine as the functional monomer and trimethylolpropane trimethacrylate (TRIM) as the cross-linker, bringing the average size up to ∼45 nm. Five targets were imprinted—the Selective Androgen Receptor Modulators (SARMs) andarine, ligandrol and RAD-140;
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Force between magnetic nanoplates with dipolar interactions Nano Express Pub Date : 2023-04-27 Norio Inui
This study considers the dependence of the force caused by the dipolar interaction between small low-dimensional magnets such as single-molecule magnets and two-dimensional magnets on the distance between them within the framework of the dipolar Ising model with nearest-neighbor exchange interactions and long-range dipolar interactions. In particular, we focus on the rapid change in the force between
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Monolithic heterogeneous integration of Si photodetector and Van der Waals heterojunction with photocurrent enhancement Nano Express Pub Date : 2023-03-17 Jiaqi Li, Zebin Li, Sheng Xie, Yue Su, Xurui Mao
Two-dimensional material has many novel features, which can be used to significantly improve the performance of traditional photonic and electronic devices. Therefore, the development of silicon/two-dimensional material monolithic heterogeneous integrated photodetector has attracted extensive attention worldwide. In this paper, we present a method to enhance the response of photocurrent of silicon-based
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Temperature dependent black phosphorus transistor and memory Nano Express Pub Date : 2023-03-06 Arun Kumar, Loredana Viscardi, Enver Faella, Filippo Giubileo, Kimberly Intonti, Aniello Pelella, Stephan Sleziona, Osamah Kharsah, Marika Schleberger, Antonio Di Bartolomeo
We studied the temperature dependent transport properties and memory behaviour of ultrathin black phosphorus field-effect transistors. The devices show electrical conductance and field-effect mobility that decreases with the rising temperature. The field effect mobility, which depends also on the gate voltage sweep range, is 283 cm2V−1s−1 at 150 K and reduces to 33 cm2V−1s−1 at 340 K, when the voltage
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Plasma assisted approaches toward high quality transferred synthetic graphene for electronics Nano Express Pub Date : 2023-03-01 Yibo Wang, Huishan Wang, Chengxin Jiang, Xipin Chen, Chen Chen, Ziqiang Kong, Haomin Wang
Graphene has received much attention in multiple fields due to its unique physical and electrical properties, especially in the microelectronic application. Nowadays, graphene can be catalytically produced on active substrates by chemical vapor deposition and then transferred to the target substrates. However, the widely used wet transfer technique often causes inevitable structural damage and surface
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Modelling peptide self-assembly within a partially disordered tau filament Nano Express Pub Date : 2023-02-16 Oguzhan Maraba, Shayon Bhattacharya, Martin Conda-Sheridan, Damien Thompson
Peptide self-assemblies are a natural template for designing bio-inspired functional materials given the extensive characterisation of neurodegenerative and non-disease biological amyloid protein assemblies and advances in rational, modelling-led materials design. These bioinspired materials employ design rules obtained from known aggregation-prone peptides or de novo screening for sequences most amenable
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A novel self-separating silicon nanowire thin film and application in lithium-ion batteries Nano Express Pub Date : 2023-02-15 Haibin Li, Shinya Kato, Yosuke Ishii, Yasuyoshi Kurokawa, Tetsuo Soga
Nano silicon structures are important materials for modern electronic devices and have been widely researched with regard to photoelectricity, thermoelectricity, and lithium-ion batteries. However, since the nano silicon structures fabricated by conventional methods cannot be separated from silicon substrates, reuse of the substrate is restricted. Here, we propose a simple fabrication method to separate
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Silver nanoclusters prepared in water-in-oil emulsions Nano Express Pub Date : 2023-02-15 Hector H Oyem, Andrew Houlton, Benjamin R Horrocks
Stable silver clusters can be prepared by a simple electroless reduction reaction taking place in water-in-oil emulsions. An emulsion containing AgNO3 in the water droplets was mixed with a similar emulsion containing aqueous NaBH4 droplets. The droplet diameter, based on Rayleigh scattering, was 41 nm and the mean number of Ag+ ions in each droplet varied from 2.0 to 21.7 as the concentration increased
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Nitrogen plasma passivation of GaAs nanowires resolved by temperature dependent photoluminescence Nano Express Pub Date : 2023-01-23 Austin Irish, Xianshao Zou, Enrique Barrigon, Giulio D’Acunto, Rainer Timm, Magnus T Borgström, Arkady Yartsev
We demonstrate a significant improvement in the optical performance of GaAs nanowires achieved using a mixed nitrogen-hydrogen plasma which passivates surface states and reduces the rate of nonradiative recombination. This has been confirmed by time-resolved photoluminescence measurements. At room temperature, the intensity and lifetime of radiative recombination in the plasma-treated nanowires was
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Photoelectron spectromicroscopy analysis of graphene during gate-controlled photo-oxidation process Nano Express Pub Date : 2023-01-13 Naoka Nagamura, Shun Konno, Morihiro Matsumoto, Wenxiong Zhang, Masato Kotsugi, Masaharu Oshima, Ryo Nouchi
The analysis of chemical reactions in two-dimensional (2D) materials is becoming increasingly important for device applications. Typically, 2D materials are in the form of small flakes; therefore, local inhomogeneities between or within the flakes should be investigated. In this study, we investigated the gate-controlled UV photo-oxidation reaction of monolayer graphene sheets using field-effect transistor
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Non-volatile memory storage in tri-layer structures using the intrinsically ferromagnetic semiconductors GdN and DyN Nano Express Pub Date : 2023-01-12 Sam Devese, Catherine Pot, Franck Natali, Simon Granville, Natalie Plank, Ben J Ruck, H Joe Trodahl, William Holmes-Hewett
We report on the potential use of the intrinsic ferromagnetic rare earth nitride (REN) semiconductors as ferromagnetic electrodes in tunnelling magnetoresistance and giant magnetoresistance device structures for non-volatile memory storage devices. Non-volatile memory elements utilising magnetic materials have been an industry standard for decades. However, the typical metallic ferromagnets and dilute
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The effect of flow on radiolysis in liquid phase-TEM flow cells Nano Express Pub Date : 2023-01-10 Stefan Merkens, Giuseppe De Salvo, Andrey Chuvilin
Applying a continuous flow to rinse radiolytic species from the irradiated volume is a widely proposed strategy to reduce beam-related artefacts in Liquid-Phase Transmission Electron Microscopy (LP-TEM). However, this has not been verified either experimentally or theoretically to date. Here we explore an extended numerical model implementing radiolytic chemistry, diffusion and liquid convection to