We present a classical and a quantum constant of motion used to study the behavior of an electron moving in the vicinity of a tridimensional charged nanostructure with electric dipole. It is the generalization of the bidimensional version studied in a previous work. The classical case is found by using two approaches: the Hamilton Jacobi equation and a Newtonian treatment. The quantum case is obtained

The surface characteristics of nanomaterials primarily determine their combination with biomolecules, and the inescapable defects on the surface of nanomaterials could alter materials structure and properties. In this work, according to the structure and composition of the material, we designed three representative MoS2 nanosheets with different vacancy defects. Then the interactions between the three

Contrast-based photoacoustic imaging is an emerging imaging technology that gold nanoparticles (a kind of photoacoustic contrast agent with a size of 100 nm) are injected into blood vessels for photoacoustic imaging. Image reconstruction is a critical step in photoacoustic imaging, due to the fact that limitations and incompleteness of photoacoustic imaging data of image reconstruction are equivalent

Self-assembly researches in nanoscale have attracted numerous attention from researchers around the world. However, few studies have attempted to include discussions and visualization of literatures on this topic. This study conducted a bibliometric review on self-assembly researches in nanoscale from 1992 to 2020 using CiteSpace. Five thousand four hundred ninety-seven articles from the Web of Science

In this paper, the erythrocyte-like Bi2WO6 structures were firstly synthesized and then were used as template, loading BiOI nanosheets on it. Then the erythrocyte-like BiOI/Bi2WO6 heterostructures were synthesized. Meantime, BiOI/Bi2WO6 heterostructures with different ratio of I/W were synthesized. The crystalline, morphology, chemical composition, and optical properties of BiOI/Bi2WO6 heterostructures

In the present work, Li MO2 (Li CoO2, Li NiO2, LiMnO2, or LiFeO2) metal oxides of the transition lithium layers were modified to serve as cathode materials for lithium-ion batteries, usually prepared by combustion reaction for better electrochemical efficiency. Li: Co: Ni: Fe: O2 (LCNFO) powder was first prepared in a weight percentages mixture of 1:0.5:0.45:0.5:1 with citric acid as fuel, and de-ionized

Photocatalytic cement is self-cleaning due to the addition of titanium dioxide (TiO2) nanoparticles, which react with sunlight (UV) and produce reactive oxygen species (ROS). Construction workers using photocatalytic cement are exposed not only to cement particles that are irritants but also to nano TiO2 and UV, both carcinogens, as well as the generated ROS. Quantifying ROS generated from added nano

Using a simple and facile method, we precisely controlled the two-dimensional layered array structure of graphene oxide (GO)–iron oxide (Fe3O4) nanoparticle hybrid multilayer films and investigated the correlation between the assembled structure of the hybrid films and their magnetic properties. GO–Fe3O4 nanoparticle hybrids were obtained via the ligand exchange of oleic acid-functionalized Fe3O4 nanoparticles

Transition metal chalcogenides (TMCs) nanomaterials have become of great scientific interest due to unusual physical and chemical properties and the useful technological applications. Here, we have studied the effect of different transition metal (TM) doping on the structural, electronic, magnetic, and vibrational properties of Ten (n = 6, 8, 10, and 12) clusters using density functional theory calculations

The rapid increase in antibacterial resistance of pathogenic bacteria poses a key threat to human health. This has triggered initiatives worldwide to discover more potent antimicrobial agents. Hence, cefixime was conjugated to gold and silver nanoparticles (NPs) and resultant nano-conjugates (Cfm-AuNPs and Cfm-AgNPs) were evaluated against Staphylococcus aureus (S. aureus) ATCC 25923. The synthesized

The production of cellulose nanocrystals (CNCs) from vegetable fibres and residues has been intensely investigated due to the properties of high crystallinity and specific surface area of these nanofillers. The most common method of obtaining CNCs is by acid hydrolysis with inorganic acids; however, this method can lead to uncontrolled depolymerisation of the cellulose. Thus, this article examines

The original version of this article unfortunately contained a mistake on the first author name.

Nanofluids were prepared by dispersing dodecanethiol-coated copper nanoparticles (~ 50 nm average diameter) in toluene. The stability and thermal conductivity of the nanofluids were investigated for various particle volume concentrations (0.09–1.5 vol%) and temperatures (293–333 K). The amount of dodecanethiol surfactant coated on the nanoparticle surface was determined by thermogravimetric analysis

The increase in the amount of wastewater containing organic pollutants in various industrial processes creates serious problems for the environment. Sulfate radical-based advanced oxidation process (AOP) is an effective route to remove pollutants from wastewater. However, designing a new nano-based catalyst to generate sulfate radicals is an important factor for the AOP. For this vision, porous trimanganese

Magnetic Fe3O4/C nanoparticles with hollow grape cluster morphology were synthesized through hydrothermal method, using SBA-15 as the hard template, glucose as the carbon source, and ferric chloride hexahydrate as the iron source. As-synthesized magnetic nanomaterials were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM),

Nanotechnology has provided an unprecedented opportunity in addressing challenges faced by cancer treatment. Nanomaterials represent a promising and versatile method in biomedical applications. PEGylation of nanomaterials is considered as the most effective strategy for commercial relevance. The purpose of this study was to develop a novel solvothermal synthesis of PEGylated tungsten trioxide (PEG-WO3)

Graphene oxide has been functionalized with crown-ether moieties, while silica has been functionalized with stable free radicals of nitroxide type. These two materials and their mixture were firstly characterized by IR, ESR, SEM, and Raman spectroscopy, and secondly tested further for removal of some organic and inorganic pollutants from water, like benzyl alcohol, methylene blue dye, iron (II), and

Metal-organic frameworks (MOFs) have been recognized as promising adsorbents for carbon capture due to their ultrahigh surface areas and tunable properties. However, a majority of MOFs have strict requirements for preparation and high mass transfer resistance that limits the gas separation time. In order to improve the applicability of MOFs to practical applications, herein, we reported an experimental

First approach towards in situ synthesis of iron (Fe) nanoparticles within poly(N-isopropylacrylamide-acrylic acid) (p(NIPAM-AA)) microgel is established in this work. Morphology, size, and size distribution of Fe-p(NIPAM-AA) hybrid microgel are confirmed by FTIR, STEM, and UV-Vis spectroscopy. Size of majority of Fe nanoparticles lies in 5–25-nm range, and very few nanoparticles lie in 30–40-nm range

Methods obtaining gypsum whiskers via calcining dihydrate or hemihydrate gypsum perform high energy consumption. It also performs potential environmental impacts. New methods with energy-saving, high-efficiency, and environmentally friendly perform great challenges, which aim at fabricating gypsum whiskers even nanowhiskers. In this study, we used high-concentration calcium acetate solution and dilute

The present investigation concentrates on the reduction of NOx emissions, the indirect greenhouse gases, which generate ozone by reacting with the atmosphere. A series of composite catalytic support (TiO2-CNTs) with a constant TiO2-CNT ratio prepared by precipitation method was utilized to synthesize Fe-modified V2O5/TiO2-CNT catalyst for selective catalytic reduction (SCR) of NOx with ammonia (NH3)

In this paper, design and modeling of a surface plasmon resonance (SPR) sensors using transition metal dichalcogenide (TMDC) 2D nanomaterials such as tungsten sulfide (WS2) and graphene with the improvements of the sensitivity and the figure of merit (FoM) are demonstrated. The proposed sensors are based on Kretschmann configuration for the obtaining of the reflectivity using the transfer matrix method

Perfluorooctanoic acid (PFOA) is ubiquitous in the environment because of its wide applications in aqueous film forming foam, food packing, waterproof breathable fabrics, and Teflon products. Though it is resistant to biodegradation, photocatalytic degradation has been proven possible. In this study, zero-valent iron nanoparticles (Fe0 NPs), with or without 1% polyvinylpyrrolidone (PVP) coating, were

The porous Sb2SxSe3-x thin films with different pore sizes were successfully prepared on the TiO2 compact layer by the pyrolysis of the precursor solution containing N-butyldithiocarbamic acid, Se, and Sb2O3 in DMF and using the relative low spin-coating speed. The effect of the pyrolysis temperature on the chemical composition, optical absorption, crystal phase, and pore size of the porous Sb2SxSe3-x

Device testing of polymer electrolyte membrane fuel cell catalysts is essential for electrocatalyst development, yet most reported catalysts fabricated with nanoceramic coatings via atomic layer deposition (ALD) have not been thoroughly examined in this fashion. Platinum nanoparticle catalysts supported on functionalized XC72 carbon black that had been modified with sub-monolayer WN films and subjected

Abnormal metabolism of cancer cells leads to changes in the concentration of various components in the cell metabolic fluid, which is obviously different from that in normal cells. The two most representative parameters used for the early diagnosis of cancer are acidity (pH) and dissolved oxygen (DO) in the external environment of cancer cells. This study aimed to propose a dual-parameter detection

To test if the transit of a nanoparticle across different organs in the body affects its properties at the final destination, we devised an in vitro system that mimics the passage of nanoparticles from the blood to the lung to the brain and, occasionally, back to the blood. Each of the three media provided a unique corona to the nanoparticles, comprising mainly secreted, blood-specific proteins in

This work presents modelling for the aggregation process of metal nanoparticles following a theory proposed in literature. In this theory, metal atoms aggregate into particles of bigger size due to Van der Waal’s forces of attraction. Then, owing to the electrostatic forces of repulsion, the particles eventually stop aggregating and become stabilized. Based on this mechanistic description, we developed

Both dispersion behaviors and electrokinetic properties of nanoceria particles in concentrated slurries were researched with the ultrasound attenuation and electroacoustic technologies, and influences of dispersing media were analyzed. It was found that particle size distribution (PSD) of the nanoceria could be fitted well by the bimodal model with lower errors, and zeta potential of the particles

The red Pisha sandstone was taken as absorbents to investigate the effects of the solution pH, the adsorption time and temperature adsorption onto Ni (II) absorption by the Pisha sandstone, and used dynamics and thermodynamic absorption models, coupled with microcalorimetry and infrared spectroscopic (FTIR) analysis, and scanning electron microscope-energy dispersive spectrometer (SEM-EDS); it aimed

Series samples MnBi1-xGdx (x = 0, 0.04, 0.08, 0.12, and 0.16) were prepared and studied the structure and magnetic properties. The Rietveld refinement results showed that the low-temperature phase MnBi content in these samples is above 78% and the doped atoms occupied the position of Bi in the MnBi crystal structure. The Debye temperature is founding to decrease with increasing doping. The Curie temperature

This paper systematically studied the extraction process of total flavonoids from quinoa and the kinetics of macroporous resin purification. On the basis of single-factor experiments, the optimum extraction and purification process of total flavonoids from quinoa was studied by orthogonal experiments. The results showed that the optimum extraction conditions were as follows: ultrasonic time 25 min

In this paper, the selective laser melting (SLM) forming method was combined with the requirement of boiling heat transfer for porous structure to study the forming process and boiling heat transfer characteristics of porous structure of G-surface lattice formed by SLM. 316L stainless steel powder was used to rasterize the G-surface structure. Besides, porosity and surface morphology of G-surface lattice

Thrombosis is one of the leading causes of death worldwide. Out of four, one person is dying of thrombosis; yet, the seriousness of this disease is underappreciated. Its early prediction and prevention continue to be a dilemma that confuses researchers. Nevertheless, a light can be seen at the end of the tunnel; thanks to nanoscience which has led to the development of new generations of nanostructure

Photodynamic therapy (PDT) with photosensitizers has been considered an effective strategy for treating tumors by generating reactive oxygen species (ROS) to induce tumor cells apoptosis or necrosis. However, the poor water solubility, rapid blood clearance, and lack of effective targeting of the photosensitizer are still a serious challenge for its satisfactory anti-cancer efficacy. Herein, we fabricated

TiO2 prolatenanospheroids (PNSs) may be photosensitizers (PSs), which act by catalyzation of hydroxyl radical (∙OH) formation upon light illumination. ∙OH might, in turn, contribute to killing of cancer cells. On the other hand, there is great concern about toxicity in the dark of TiO2 nanoparticles in general. In this work, we have investigated the biocompatibility of TiO2 PNSs of the anatase crystal

Carbendazim residues in Chinese chives were treated by photocatalysis using the following three electrospun TiO2 nanofibers: TTiP/PVP, TTiP/PVAc, and TBOT/PVP. The as-spun fibers were calcined at 500–650 °C to achieve anatase/rutile (A/R) ratios of 100:0, 80:20, 70:30, 50:50, and 30:70. The obtained anatase crystallite sizes were in the range of 13.9–28.1 nm, while the rutile crystallite sizes were

Nylon12, a kind of polyamide with long carbon chain, who has low density, low melting point, good thermal stability, and high decomposition temperature, is widely used in various fields, such as automobile system pipeline, chemical petroleum pipeline, and hydraulic transmission system. In the present work, the nylon12 self-coiling into the single-walled carbon nanotubes was studied by the molecular

Over the past few decades, hollow-structured silica particles have attracted significant interest from material’s scientists due to their unique properties and morphologies related to biomedical applications. This interest has spurred the development of synthetic processes of silica particles and in this paper we report on the microwave-based synthesis of nano-silica hollow spheres (NSHS) with uniform

Magnetic hyperthermia therapy may be combined with controlled release of multiple chemotherapeutic agents to effectively treat cancerous tumors. This study describes the preparation and characteristics of gemcitabine- and paclitaxel-loaded magnetoliposomes to investigate the in vitro potential of this formulation in association with magnetic hyperthermia therapy to control drug delivery. Magnetic nanoparticles

Here, we report a systematic investigation of the effect of experimental parameters on the structure, morphology and electrochemically active surface area of 3-D mesoporous platinum (Pt) framework. Template-assisted deposition of the mesoporous Pt framework is achieved using phytantriol-based inverse bicontinuous cubic phase of double diamond morphology (QIID) with Pn3m symmetry. Platinum is deposited

In this work, Li2CoTi3O8 nanofibers and Li2CoTi3O8·CoTiO3·TiO2 (LCT) composite nanofibers as anode materials in lithium-ion batteries (LIBs) were successfully prepared by a traditional electrospinning technology, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectrometer (EDS), X-ray photoelectron

In situ growth of naked Ag nanoparticles on graphene oxide was achieved following a simple, green, and environment-friendly one-step stirring method. In the absence of extra reductant and stabilizer, the naked Ag nanoparticles formed on the surface of GO via a spontaneous redox reaction between Ag+ and GO at room temperature. The morphology and microstructure of the resultant heterogeneous nanostructures

There is a great deal of concern about the presence of pharmaceutical pollutants (PP) in water from various sources. The applications of heterogeneous photocatalysis using titanium dioxide (TiO2) for water treatment have been a feasible technology to overcome the occurrence of PP in water and wastewater. At the same time, polymer composite has proven as an excellent material due to its wide range of

Synergistic effects occurring between biologically active substances are of great importance for efficient treatment of many diseases. Therefore, the aim of research was to determine impact of sodium hexametaphosphate (HEX), which is a well-known permeabilizer, on the cytotoxicity of silver ions and two types of AgNPs towards HL-60 and U-937 tumor cells. The AgNPs were synthesized in a chemical reduction

Ni-Fe alloy nanoparticles were able to be prepared by a one-step hydrazine reduction, where the formation mechanism is unclear. In this paper, Ni1xFex nanoparticles with a composition gradient were prepared, and the change in composition gradient in the Ni1 − xFex nanoparticles was found to be affected by Fe content. Furthermore, it was surprising that the increase in Fe content significantly increased

A simple sol-gel synthesis method has been developed to synthesize uniform nanospheres of gold lithium-doped titanium dioxide in anatase phase (Au/Li-TiO2) with a well-defined core-shell structure with the Li-doped titania as shell and Au nanoparticles as core. The resulting core-shell nanoparticles have a high surface area (~494 m2/g) and uniform pore size (~3.5 nm) for the anatase shell. The synthesis

Co2CrO4 microspheres were hydrothermally synthesized as new electrocatalyst for water oxidation/oxygen evolution reaction (OER). SEM and TEM analyses revealed the hierarchical morphology of the microspheres which are assembly of nanoplates formed by the assembly of individual nanoparticles with ca. 17 nm size. BET analyses showed that this new material has very large surface area (125 m2 g−1). Co2CrO4

Magnetic nanoparticles (MNPs) modified by polyamidoamine (PAMAM)-immobilized 2,2,6,6-tetramethyl-1-piperidinyl-oxyl (TEMPO) as recoverable catalysts for catalytic oxidation of polyethylene glycol were designed and prepared, which were expected to combine the advantages of easy recovery of MNPs and high activity of PAMAM-immobilized TEMPO. The catalysts of MNPs modified by PAMAM-immobilized TEMPO (MNPs-PAMAM-T)

Silver sulfide clusters with size less than 2 nm are of much interest in photoelectric devices, such as photoconductive devices, infrared detectors and superconductors. The electronic structures of [Ag(Ag2S)n]+ (n = 1–9) clusters are investigated using the combined method of genetic algorithm (GA) and density functional theory (DFT). Results reveal that S atoms prefer to be at the tip of the structure

Lithium-sulfur (Li-S) batteries are considered as next-generation technology for energy storage due to their high energy density. However, the rapid capacity fading resulted from the shuttle effect obstructs their practical application. Herein, ultrathin dense double-walled carbon nanotube (DWCNT) membrane has been designed to impede the shuttle effect. The outer wall of DWCNT helps to keep the integrity

Present study peruses the vibrational behavior of triangular graphene sheets based on nano-mechanical graphene sensors. To this end, pristine and defected triangular graphene sheets in two directions, zigzag and armchair, have been simulated in molecular dynamic environment, and also the static response of sheets alone and with attached particles has been studied. By extracting the natural frequency

The potential of analytical ultracentrifugation (AUC) in the analysis of the drug distribution of liposomal doxorubicin formulation (with nominal diameter of 85 nm) in the presence of human serum proteins is demonstrated using the absorbance detection function of the instrument. Based on the AUC measurement (and model fitting for molecular mass calculation), we show that in a single experiment, it

Magnetic carbon nanotubes (CNTs)/alumina (Al2O3) nanocomposites were synthesized by the direct growth of CNTs on alumina by chemical vapor deposition (CVD) process. X-ray diffraction studies show that the crystalline structure of alumina nanoparticles remains preserved during the CVD process. Electron microscopy studies reveal the uniform distribution of CNTs within the alumina matrix. CNTs of average

g-C3N4 (graphitic carbon nitride) is an interesting photocatalyst that has found application in many fields especially in photocatalysis. It can be synthesized by various methods, and cocatalysts can be incorporated in its structure to construct a composite suitable for the desired application. We report synthesis of thin-layer g-C3N4 nanosheet decoration with MoS2 nanoparticles for the preparation

A simple and environment-friendly approach to prepare zinc oxide nanoaggregates was achieved by employing ethylene glycol–H2O as the reaction medium. The composition and structure of the as-fabricated ZnO products were confirmed using X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption measurements. By tailoring the volume ratio

Quantum dots of halide perovskite are considered to be the promising candidates for optoelectronic applications. Although many methods have been developed to prepare CsPbX3 (X = Cl, Br, I) nanocrystals, the large-scale synthesis of CsPbX3 nanocrystals remains an outstanding challenge. In this paper, nanocrystals of CsPbBr3 were subjected to one-pot synthesis in octane by using a precursor with a high

Recent thrust in the biomaterials research has shifted towards developing bioactive and resorbable scaffolds with nanotechnological interventions. Next-generation bone scaffolds need to be multifunctional with desired osteo-integration ability, conformed resorption rate and in vivo imaging potential. In this study, we synthesized biogenic multifunctional gold nanoparticles (AuNPs) using immobilized

The influence of polymeric shell formed by the layer-by-layer (LbL) assembly technique using chitosan or its grafted copolymers with dextran or poly(ethylene glycol) and dextran sulfate on physico-chemical properties and aggregation kinetics of silver nanoparticles (AgNP) was investigated. It is shown that the hydrodynamic diameter of encapsulated AgNP increases linearly with increasing the number

Double carbon-embedded Na3V2(PO4)3 (DC-NVP) nanocomposites were prepared via in situ growth of NVP@C nanoparticles on carbon nanotubes (CNTs). Beneficial of a high electronic conductivity network and structure stability, the DC-NVP nanocomposite as an anode of sodium ion batteries (SIBs) reveals outstanding electrochemical properties, delivering ultra-long cycle life with a first charge capacity of