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Experimental approaches for micromagnetic coercivity analysis of advanced permanent magnet materials Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-12 Satoshi Okamoto
Abstract Although coercivity is one of the fundamental properties of permanent magnets, it has not been well understood. In this paper, micromagnetics and thermal activation magnetization reversal theories are briefly reviewed, and then our recent macroscopic and microscopic experimental approaches for thermally activated magnetization reversal in advanced Nd-Fe-B hot-deformed magnets are explained
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Solvothermally-synthesized anatase TiO2 nanoparticles for photoanodes in dye-sensitized solar cells Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-11 Kadhim Attafi; Andrew Nattestad; Hamzeh Qutaish; Min-Sik Park; Lok Kumar Shrestha; Katsuhiko Ariga; Shi Xue Dou; Jung Ho Kim
Abstract Many researchers working on the development of Dye-sensitized solar cells (DSCs) continue to focus on the synthesis of photoanode materials with high surface area, along with high light scattering ability to enhance light harvesting efficiency (LHE). On the other hand, dye packing density, which can also affect the LHE significantly, is often overlooked. Solvothermally-synthesized anatase
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Temperature-dependent electronic structure of bixbyite α-Mn2O3 and the importance of a subtle structural change on oxygen electrocatalysis Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-07 Junais Habeeb Mokkath; Maryam Jahan; Masahiko Tanaka; Satoshi Tominaka; Joel Henzie
ABSTRACT Bixbyite α -Mn2O3 is an inexpensive Earth-abundant mineral that can be used to drive both oxygen evolution (OER) and oxygen reduction reactions (ORR) in alkaline conditions. It possesses a subtle orthorhombic → cubic phase change near room temperature that suppresses Jahn-Teller distortions and presents a unique opportunity to study how atomic structure affects the electronic structure and
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Conducting polymer-inorganic nanocomposite-based gas sensors: a review Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-06 Yan Yan; Guiqin Yang; Jian-Long Xu; Meng Zhang; Chi-Ching Kuo; Sui-Dong Wang
ABSTRACT With the rapid development of conductive polymers, they have shown great potential in room-temperature chemical gas detection, as their electrical conductivity can be changed upon exposure to oxidative or reductive gas molecules at room temperature. However, due to their relatively low conductivity and high affinity toward volatile organic compounds and water molecules, they always exhibit
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Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe2O3 on GaN Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-06 Sergey M. Suturin; Alexander M. Korovin; Alla A. Sitnikova; Demid A. Kirilenko; Mikhail P. Volkov; Polina A. Dvortsova; Victor A. Ukleev; Masao Tabuchi; Nikolai S. Sokolov
Abstract In the present paper we discuss correlations between crystal structure and magnetic properties of epitaxial ε-Fe2O3 films grown on GaN. The large magnetocrystalline anisotropy and room temperature multiferroic properties of this exotic iron oxide polymorph, make it a perspective material for the development of low power consumption magnetic media storage devices. Extending our recent progress
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Micropillar compression deformation of single crystals of α-Nb5Si3 with the tetragonal D8 l structure Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-05 Kyosuke Kishida; Takuto Maruyama; Takayoshi Fukuyama; Haruyuki Inui
ABSTRACT The plastic deformation behavior of single crystals of α-Nb5Si3 with the tetragonal D8 l structure has been investigated by micropillar compression at room temperature as a function of crystal orientation and specimen size. Three slip systems, (001)<010>, {110}<1 1 ˉ 0> and {0 1 ˉ 1}<111>, are found to be operative in micropillar specimens of α-Nb5Si3 single crystals at room temperature, as
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High performance hot-deformed Nd-Fe-B magnets (Review) Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-05 Keiko Hioki
Abstract Hot-deformed anisotropic Nd-Fe-B magnets may potentially attain high coercivity due to their fine and highly orientated crystal grain microstructure as a result of the unique production process that creates these magnets. However, despite their fine grain size of 100–500 nm, coercivity was only around 25% of the full potential of the anisotropy field. This grain size was close to the critical
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Flexible wearable sensors - an update in view of touch-sensing Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2021-01-04 Chi Cuong Vu; Sang Jin Kim; Jooyong Kim
ABSTRACT Nowadays, much of user interface is based on touch and the touch sensors have been common for displays, Internet of things (IoT) projects, or robotics. They can be found in lamps, touch screens of smartphones, or other wide arrays of applications as well. However, the conventional touch sensors, fabricated from rigid materials, are bulky, inflexible, hard, and hard-to-wear devices. The current
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Magnetic nanostructures functionalized with a derived lysine coating applied to simultaneously remove heavy metal pollutants from environmental systems Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-16 Olivija Plohl; Marjana Simonič; Ken Kolar; Sašo Gyergyek; Lidija Fras Zemljič
The pollution of environmental systems with heavy metals is becoming a serious problem worldwide. These contaminants are one of the main issues in sludge (which is considered waste) and can even have harmful effects if the sludge is not treated properly. Thus, the development of a novel functional magnetic nanoadsorbent based on a derived lysine is reported here, which can be efficiently applied for
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Synthesis of mesoscopic particles of multi-component rare earth permanent magnet compounds Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-16 T. Thuy Trinh; Jungryang Kim; Ryota Sato; Kenshi Matsumoto; X Toshiharu Teranishi
ABSTRACT Multielement rare earth (R)–transition metal (T) intermetallics are arguably the next generation of high-performance permanent magnetic materials for future applications in energy-saving and renewable energy technologies. Pseudobinary Sm2Fe17N3 and (R,Zr)(Fe,Co,Ti)12 (R=Nd, Sm) compounds have the highest potential to meet current demands for rare-earth-element-lean permanent magnets (PMs)
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Recent progress in the conversion of biomass wastes into functional materials for value-added applications Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-14 Chufan Zhou; Yixiang Wang
ABSTRACT The amount of biomass wastes is rapidly increasing, which leads to numerous disposal problems and governance issues. Thus, the recycling and reuse of biomass wastes into value-added applications have attracted more and more attention. This paper reviews the research on biomass waste utilization and biomass wastes derived functional materials in last five years. The recent research interests
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Diphenolic acid modified PAMAM/chlorinated butyl rubber nanocomposites with superior mechanical, damping and self-healing properties Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-11 Yao Lu; Jincheng Wang; Le Wang; Shiqiang Song
ABSTRACT Based on its excellent damping properties, traditional rubberhas been widely used in various industries, includingaerospace, rail transit and automotive.However, the disadvantages of effective damping area, unstable damping performance, easy fatigue and aging, greatly limited the further application of rubber materials. Thus, it is important to develop novel modifiedrubber damping materials
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Computational thermodynamics and microstructure simulations to understand the role of grain boundary phase in Nd-Fe-B hard magnets Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-07 Toshiyuki Koyama; Yuhki Tsukada; Taichi Abe
Abstract To control the coercivity of Nd hard magnets efficiently, the thermal stability of constituent phases and the microstructure changes observed in hard magnets during thermal processes should be understood. Recently, the CALPHAD method and phase-field method have been recognized as promising approaches to realize phase stability and microstructure developments in engineering materials. Thus
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Effect of Dy substitution in the giant magnetocaloric properties of HoB2 Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-07 Pedro Baptista de Castro; Kensei Terashima; Takafumi D. Yamamoto; Suguru Iwasaki; Ryo Matsumoto; Shintaro Adachi; Yoshito Saito; Hiroyuki Takeya; Yoshihiko Takano
Recently, a massive magnetocaloric effect near the liquefaction temperature of hydrogen has been reported in the ferromagnetic material HoB2. Here we investigate the effects of Dy substitution in the magnetocaloric properties of Ho1-x Dy x B2 alloys (x = 0, 0.3, 0.5, 0.7, 1.0). We find that the Curie temperature (T C) gradually increases upon Dy substitution, while the magnitude of the magnetic entropy
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Cetuximab-conjugated perfluorohexane/gold nanoparticles for low intensity focused ultrasound diagnosis ablation of thyroid cancer treatment Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-12-03 Ying Liu; Yue Ma; Xiaoshan Peng; Lingling Wang; Haixia Li; Wen Cheng; Xiulan Zheng
Abstract We report the formulation of nanoassemblies (NAs) comprising C225 conjugates Au-PFH-NAs (C-Au-PFH-NAs) for low-intensity focused ultrasound diagnosis ablation of thyroid cancer. C-Au-PFH-NAs showed excellent stability in water, phosphate-buffered saline (PBS), and 20% rat serum. Transmission electron microscopy (TEM) images also revealed the effective construction of C-Au-PFH-NAs as common
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Progress in polydopamine-based melanin mimetic materials for structural color generation Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-11-19 Michinari Kohri
ABSTRACT Structural color is a color derived from optical interaction between light and a microstructure and is often seen in nature. Natural melanin plays an important role in bright structural coloration. For example, the vivid colors of peacock feathers are due to structural colors. The periodic arrangement of melanin granules inside the feathers leads to light interference, and the black granules
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Improvement of mechanical properties of elastic materials by chemical methods Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-11-17 Yukikazu Takeoka; Sizhe Liu; Fumio Asai
ABSTRACT Elastomers such as gels and rubbers play various roles in our lives. Elastomers, which guarantee the safety of airplanes and automobiles and the stability of buildings, are materials that have made the lives of people in the 20th century extremely convenient. The existence of macromolecules, that is, giant molecules, has been clarified; the development of synthetic macromolecules has progressed;
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Thermally enhanced polyolefin composites: fundamentals, progress, challenges, and prospects Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-11-02 A.U. Chaudhry; Abdel Nasser Mabrouk; Ahmed Abdala
ABSTRACT The low thermal conductivity of polymers is a barrier to their use in applications requiring high thermal conductivity such as electronic packaging, heat exchangers, and thermal management devices. Polyolefins represent about 55% of global thermoplastic production, and therefore improving their thermal conductivity is essential for many applications. This review analyzes the advances in enhancing
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Intermetallic compounds in heterogeneous catalysis Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-11-02 Marc Armbrüster; Yuri Grin
(2020). Intermetallic compounds in heterogeneous catalysis. Science and Technology of Advanced Materials: Vol. 21, No. 1, pp. 767-767.
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Organic Eu3+-complex-anchored porous diatomite channels enable UV protection and down conversion in hybrid material Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-10-28 Xiaoshuang Yu; Lili Li; Yue Zhao; Xinzhi Wang; Yao Wang; Wenfei Shen; Xiaolin Zhang; Yanying Zhang; Jianguo Tang; Olle Inganäs
ABSTRACT The organic Eu3+-complex [Eu(TTA)3Phen] has been incorporated into the channels of surface-modified frustules from diatoms as a key material to absorb and convert UV-photons to visible luminescence. Systematic investigation results indicate that the organic Eu3+-complex encapsulated in the functionalized diatomite channels exhibits enhanced luminescence and longer lifetime, owning to the Eu(TTA)3Phen
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Review of microstructure and properties of low temperature lead-free solder in electronic packaging Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-10-19 Kai-Kai Xu; Liang Zhang; Li-Li Gao; Nan Jiang; Lei Zhang; Su-Juan Zhong
ABSTRACT Low temperature solder (In-based, Sn-Bi, Sn-Zn) has great advantages in aerospace and through-hole technology assemblies in IBM mainframe due to its unique low temperature characteristics. The review evaluates the effects of alloying elements, rare earth elements and nanoparticles on the wettability, microstructure, mechanical properties and oxidation resistance of the low-temperature solders
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Essential structural and experimental descriptors for bulk and grain boundary conductivities of Li solid electrolytes Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-10-19 Yen-Ju Wu; Takehiro Tanaka; Tomoyuki Komori; Mikiya Fujii; Hiroshi Mizuno; Satoshi Itoh; Tadanobu Takada; Erina Fujita; Yibin Xu
ABSTRACT We present a computational approach for identifying the important descriptors of the ionic conductivities of lithium solid electrolytes. Our approach discriminates the factors of both bulk and grain boundary conductivities, which have been rarely reported. The effects of the interrelated structural (e.g. grain size, phase), material (e.g. Li ratio), chemical (e.g. electronegativity, polarizability)
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Aim high energy conversion efficiency in triboelectric nanogenerators Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-28 Hong-Joon Yoon; Sung Soo Kwak; Seong Min Kim; Sang-Woo Kim
ABSTRACT Triboelectric nanogenerators (TENGs) that enable the conversion of a given mechanical energy into electrical energy at high efficiency have been very important in practice. Since the given mechanical energy is involuntarily converted to secondary energy sources (light, heat, and sound during triboelectrification), the significant amount of energy being converted is lost. Various studies have
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Addressing the need for standardization of test methods for self-healing concrete: an inter-laboratory study on concrete with macrocapsules Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-22 Tim Van Mullem; Giovanni Anglani; Marta Dudek; Hanne Vanoutrive; Girts Bumanis; Chrysoula Litina; Arkadiusz Kwiecień; Abir Al-Tabbaa; Diana Bajare; Teresa Stryszewska; Robby Caspeele; Kim Van Tittelboom; Tulliani Jean-Marc; Elke Gruyaert; Paola Antonaci; Nele De Belie
Development and commercialization of self-healing concrete is hampered due to a lack of standardized test methods. Six inter-laboratory testing programs are being executed by the EU COST action SARCOS, each focusing on test methods for a specific self-healing technique. This paper reports on the comparison of tests for mortar and concrete specimens with polyurethane encapsulated in glass macrocapsules
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Determining phase transitions of layered oxides via electrochemical and crystallographic analysis Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-15 Katja Fröhlich; Isaac Abrahams; Marcus Jahn
The chemical diffusion coefficient in LiNi1/3Mn1/3Co1/3O2 was determined via the galvanostatic intermittent titration technique in the voltage range 3 to 4.2 V. Calculated diffusion coefficients in these layered oxide cathodes during charging and discharging reach a minimum at the open-circuit voltage of 3.8 V and 3.7 V vs. Li/Li+, respectively. The observed minima of the chemical diffusion coefficients
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A first step towards computational design of W-containing self-healing ferritic creep resistant steels Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-14 Hao Yu; Wei Xu; Sybrand van der Zwaag
In this work, we combine a generic alloy-by-design model with a novel concept, the nucleation barrier for the formation of Laves phase to fill the creep cavities, in order to develop multi-component creep resistant steels with kinetically tuned self-healing behaviour. In the model the high-temperature long-term strength is estimated by integrating precipitation strengthening due to M23C6 carbides and
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Finite element analysis of the fracture statistics of self-healing ceramics Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-11 Shingo Ozaki; Marika Nakamura; Toshio Osada
Self-healing materials have been recognized as a promising type of next-generation materials. Among them, self-healing ceramics play a particularly important role, and understanding them better is necessary. Therefore, in this study, we applied the oxidation kinetics-based constitutive model to finite element analysis of a series of damage-healing processes in self-healing ceramics (alumina/SiC composites)
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A simple in vitro biomimetic perfusion system for mechanotransduction study Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-11 Ruikang Xue; Sarah Cartmell
In mechanotransduction studies, flow-induced shear stress (FSS) is often applied to two-dimensional (2D) cultured cells with a parallel-plate flow chamber (PPFC) due to its simple FSS estimation. However, cells behave differently under FSS inside a 3D scaffold (e.g. 10 mPa FSS was shown to induce osteogenesis of human mesenchymal stem cells (hMSC) in 3D but over 900 mPa was needed for 2D culture).
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Stacking fault energy prediction for austenitic steels: thermodynamic modeling vs. machine learning Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-11 Xin Wang; Wei Xiong
Stacking fault energy (SFE) is of the most critical microstructure attribute for controlling the deformation mechanism and optimizing mechanical properties of austenitic steels, while there are no accurate and straightforward computational tools for modeling it. In this work, we applied both thermodynamic modeling and machine learning to predict the stacking fault energy (SFE) for more than 300 austenitic
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Photothermal and adsorption effects of silver selenide nanoparticles modified by different surfactants in nursing care of cancer patients. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-09-01 Xingju Yang,Chen Wang,Xiaoxu Zhang,Yue Wang,Feng Gao,Lixia Sun,Wenli Xu,Changxiu Qiao,Guiqin Zhang
Silver selenide nanoparticles have advantages of low cytotoxicity, desirable near-infrared light response characteristics, and easy surface modification, which attract increasing attention in chemo-photothermal therapy and nursing care of cancer patients. In this contribution, we synthesized Ag2Se nanoparticles modified by the surfactant of cetyltrimethylammonium bromide (CTAB) using a ligand exchange
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Intermetallic Pd3 X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-08-24 Rajesh Kodiyath,Gubbala V Ramesh,Maidhily Manikandan,Shigenori Ueda,Takeshi Fujita,Hideki Abe
Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd3Ti and Pd3Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicates that the electronic properties of Pd are modified significantly, as evident from the lowering of the d-band
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Intermetallic Pd3 X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-08-24 Rajesh Kodiyath, Gubbala V. Ramesh, Maidhily Manikandan, Shigenori Ueda, Takeshi Fujita, Hideki Abe
Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd3Ti and Pd3Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicates that the electronic properties of Pd are modified significantly, as evident from the lowering of the d-band
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Heusler alloys for spintronic devices: review on recent development and future perspectives Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-08-21 Kelvin Elphick; William Frost; Marjan Samiepour; Takahide Kubota; Koki Takanashi; Sukegawa Hiroaki; Seiji Mitani; Atsufumi Hirohata
Abstract Heusler alloys are theoretically predicted to become half-metals at room temperature (RT). The advantages of using these alloys are good lattice matching with major substrates, high Curie temperature above RT and intermetallic controllability for spin density of states at the Fermi energy level. The alloys are categorised into half- and full-Heusler alloys depending upon the crystalline structures
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Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-08-17 Toshio Osada,Toru Hara,Masanori Mitome,Shingo Ozaki,Taichi Abe,Kiichi Kamoda,Takahito Ohmura
ABSTRACT We propose a new theoretical kinetic model of strength recovery by oxidation-induced self-healing of surface cracks in composites containing a healing agent (HA). The kinetics is a key parameter in the design of structural components that can self-heal the damage done in service. Based on three-dimensional (3D) observations of crack-gap filling, two crack-gap filling models, i.e., a bridging
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Dual-acting antibacterial porous chitosan film embedded with a photosensitizer. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-08-03 Zi-Jun Liu,Shu-Ching Lin,Pei-Yuan Lee,Ying-Ting Lin,Zi-Lun Lai,Cheng-Chung Chang,Gou-Jen Wang
ABSTRACT This study proposes to develop a dual-acting antibacterial film of porous chitosan (Cs) embedded with small molecular compound, which possesses photosensitive characteristics with bactericidal efficacy, to promote the accelerated recovery of infectious wounds. The Cs/small molecular compound (Cs-cpd.2) dressing was prepared using the freeze-drying method. Characterization of the synthesized
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NMR-TS: de novo molecule identification from NMR spectra. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-30 Jinzhe Zhang,Kei Terayama,Masato Sumita,Kazuki Yoshizoe,Kengo Ito,Jun Kikuchi,Koji Tsuda
ABSTRACT Nuclear magnetic resonance (NMR) spectroscopy is an effective tool for identifying molecules in a sample. Although many previously observed NMR spectra are accumulated in public databases, they cover only a tiny fraction of the chemical space, and molecule identification is typically accomplished manually based on expert knowledge. Herein, we propose NMR-TS, a machine-learning-based python
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As(V) and As(III) sequestration by starch functionalized magnetite nanoparticles: influence of the synthesis route onto the trapping efficiency. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-29 Mbolantenaina Rakotomalala Robinson,Romain Coustel,Mustapha Abdelmoula,Martine Mallet
ABSTRACT We report the effect of the synthesis route of starch-functionalized magnetite nanoparticles (NPs) on their adsorption properties of As(V) and As(III) from aqueous solutions. NP synthesis was achieved by two different routes implying the alkaline precipitation of either a mixed Fe2+/Fe3+ salt solution (MC samples) or a Fe2+ salt solution in oxidative conditions (MOP samples). Syntheses were
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Materials informatics approach to understand aluminum alloys. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-29 Ryo Tamura,Makoto Watanabe,Hiroaki Mamiya,Kota Washio,Masao Yano,Katsunori Danno,Akira Kato,Tetsuya Shoji
ABSTRACT The relations between the mechanical properties, heat treatment, and compositions of elements in aluminum alloys are extracted by a materials informatics technique. In our strategy, a machine learning model is first trained by a prepared database to predict the properties of materials. The dependence of the predicted properties on explanatory variables, that is, the type of heat treatment
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Biosynthesis of selenium nanoparticles and their protective, antioxidative effects in streptozotocin induced diabetic rats. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-27 Dabei Fan,Li Li,Zhizhen Li,Ying Zhang,Xiaojun Ma,Lina Wu,Haohao Zhang,Feng Guo
ABSTRACT Green synthesis of selenium nanoparticles (Se NPs) was performed by mixing Hibiscus sabdariffa (roselle plant) leaf extract with the solution of selenious acid (H2SeO3) under continuous stirring conditions resulting the roselle plant secondary metabolites conjugated Se NPs. The existence of functional groups of roselle plant secondary metabolites on the surface of prepared Se NPs was confirmed
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Effective silicon production from SiCl4 source using hydrogen radicals generated and transported at atmospheric pressure. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-27 Yuji Okamoto,Masatomo Sumiya,Yuya Nakamura,Yoshikazu Suzuki
ABSTRACT In the Siemens method, high-purity Si is produced by reducing SiHCl3 source gas with H2 ambient under atmospheric pressure. Since the pyrolysis of SiHCl3, which produces SiCl4 as a byproduct, occurs dominantly in the practical Siemens process, the Si yield is low (~30%). In the present study, we generated hydrogen radicals (H-radicals) at pressures greater than 1 atm using tungsten filaments
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Strain-enhanced high Q-factor GaN micro-electromechanical resonator. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-27 Liwen Sang,Meiyong Liao,Xuelin Yang,Huanying Sun,Jie Zhang,Masatomo Sumiya,Bo Shen
ABSTRACT We report on a highly sensitive gallium nitride (GaN) micro-electromechanical (MEMS) resonator with a record quality factor (Q) exceeding 105 at the high resonant frequency (f) of 911 kHz by the strain engineering for the GaN-on-Si structure. The f of the double-clamped GaN beam bridge is increased from 139 to 911 kHz when the tensile stress is increased to 640 MPa. Although it is usually
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Thermally-evaporated C60/Ag/C60 multilayer electrodes for semi-transparent perovskite photovoltaics and thin film heaters. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-22 Dong-Hyeok Choi,Hae-Jun Seok,Do-Hyung Kim,Su-Kyung Kim,Han-Ki Kim
ABSTRACT We investigated the characteristics of thermally evaporated fullerene (C60)/Ag/C60 (CAC) multilayer films for use in semi-transparent perovskite solar cells (PSCs) and thin-film heaters (TFHs). The top and bottom C60 layers and Ag interlayer were prepared using multi-source thermal evaporation, and the thickness of the Ag interlayer was investigated in detail for its effects on the resistivity
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Structural reorganization and crack-healing properties of hydrogels based on dynamic diselenide linkages. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-22 Hao Xu,Nao Suzuki,Akira Takahashi,Tomoyuki Ohishi,Raita Goseki,Xu-Ming Xie,Hideyuki Otsuka
ABSTRACT We report the dynamic behavior of diselenide-containing hydrophilic polyurethanes and hydrogels based on diselenide exchange reactions in an aqueous media. Diselenide-containing linear and cross-linked polyurethanes were synthesized via polyaddition reactions using diselenide-containing diol in combination with pyridinium diol that enhances the hydrophilicity of the polymer chains. The obtained
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Prediction of viscosity behavior in oxide glass materials using cation fingerprints with artificial neural networks. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-22 Jaekyun Hwang,Yuta Tanaka,Seiichiro Ishino,Satoshi Watanabe
ABSTRACT We propose a novel descriptor of materials, named ‘cation fingerprints’, based on the chemical formula or concentrations of raw materials and their respective properties. To test its performance, this method was used to predict the viscosity of glass materials using the experimental database INTERGLAD. Using artificial neural network models, we succeeded in predicting the temperature required
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Multiscale analysis of mechanical behavior of multilayer steel structures fabricated by wire and arc additive manufacturing. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-22 Ikumu Watanabe,Zhengzhong Sun,Houichi Kitano,Kenta Goto
ABSTRACT The mechanical behavior of multilayer steel structures fabricated via wire and arc additive manufacturing (WAAM) has been investigated from the multiscale perspective. The multimaterial WAAM approach can control a heterogeneous structure and improve its mechanical properties. In this study, WAAM equipment based on plasma arc welding was used to fabricate two pairs of single- and duplex-phase
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Synthesis and characterization of magnetic nanoparticles coated with polystyrene sulfonic acid for biomedical applications. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-22 Bo-Wei Chen,Yun-Chi He,Shian-Ying Sung,Trang Thi Huynh Le,Chia-Ling Hsieh,Jiann-Yeu Chen,Zung-Hang Wei,Da-Jeng Yao
ABSTRACT The development of novel magnetic nanoparticles (MNPs) with satisfactory biocompatibility for biomedical applications has been the subject of extensive exploration over the past two decades. In this work, we synthesized superparamagnetic iron oxide MNPs coated with polystyrene sulfonic acid (PSS-MNPs) and with a conventional co-precipitation method. The core size and hydrodynamic diameter
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A comparative study of the influence of the deposition technique (electrodeposition versus sputtering) on the properties of nanostructured Fe70Pd30 films. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-13 Matteo Cialone,Monica Fernandez-Barcia,Federica Celegato,Marco Coisson,Gabriele Barrera,Margitta Uhlemann,Annett Gebert,Jordi Sort,Eva Pellicer,Paola Rizzi,Paola Tiberto
ABSTRACT Sputtering and electrodeposition are among the most widespread techniques for metallic thin film deposition. Since these techniques operate under different principles, the resulting films typically show different microstructures even when the chemical composition is kept fixed. In this work, films of Fe70Pd30 were produced in a thickness range between 30 and 600 nm, using both electrodeposition
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Development of spectral decomposition based on Bayesian information criterion with estimation of confidence interval. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-02 Hiroshi Shinotsuka,Kenji Nagata,Hideki Yoshikawa,Yoh-Ichi Mototake,Hayaru Shouno,Masato Okada
ABSTRACT We develop an automatic peak fitting algorithm using the Bayesian information criterion (BIC) fitting method with confidence-interval estimation in spectral decomposition. First, spectral decomposition is carried out by adopting the Bayesian exchange Monte Carlo method for various artificial spectral data, and the confidence interval of fitting parameters is evaluated. From the results, an
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Focus on nanogenerators: toward smart wearable devices. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-02 Jung Ho Kim
(2020). Focus on nanogenerators: toward smart wearable devices. Science and Technology of Advanced Materials: Vol. 21, No. 1, pp. 422-423.
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Bio-inspired nanomaterials for biomedical innovation. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-01 Takanori Akagi,Horacio Cabral,Peng Mi
(2020). Bio-inspired nanomaterials for biomedical innovation. Science and Technology of Advanced Materials: Vol. 21, No. 1, pp. 420-421.
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Biocompatible and flexible paper-based metal electrode for potentiometric wearable wireless biosensing. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-24 Toshiya Sakata,Masami Hagio,Akiko Saito,Yuto Mori,Masayuki Nakao,Kazuhiko Nishi
ABSTRACT A paper-based electrode is a very attractive component for a disposable, nontoxic, and flexible biosensor. In particular, wearable biosensors, which have recently been attracting interest, not only require these characteristics of paper-based electrodes but must also be able to detect various ions and biomolecules in biological fluids. In this paper, we demonstrate the detection ability of
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Recent progress in self-healable ion gels. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-24 Ryota Tamate,Masayoshi Watanabe
ABSTRACT Ion gels, soft materials that contain ionic liquids (ILs), are promising gel electrolytes for use in electrochemical devices. Due to the recent surge in demand for flexible and wearable devices, highly durable ion gels have attracted significant amounts of attention. In this review, we address recent advances in the development of ion gels that can heal themselves when mechanically damaged
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High-performance extended-gate ion-sensitive field-effect transistors with multi-gate structure for transparent, flexible, and wearable biosensors. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-23 Jin-Hyeok Jeon,Won-Ju Cho
ABSTRACT In this study, we developed a high-performance extended-gate ion-sensitive field-effect transistor (EG-ISFET) sensor on a flexible polyethylene naphthalate (PEN) substrate. The EG-ISFET sensor comprises a tin dioxide (SnO2) extended gate, which acts as a detector, and an amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistor (TFT) for a transducer. In order to self-amplify the sensitivity
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Corrosion rate prediction and influencing factors evaluation of low-alloy steels in marine atmosphere using machine learning approach. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-19 Luchun Yan,Yupeng Diao,Zhaoyang Lang,Kewei Gao
ABSTRACT The empirical modeling methods are widely used in corrosion behavior analysis. But due to the limited regression ability of conventional algorithms, modeling objects are often limited to individual factors and specific environments. This study proposed a modeling method based on machine learning to simulate the marine atmospheric corrosion behavior of low-alloy steels. The correlations between
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Osteoclast and osteoblast responsive carbonate apatite coatings for biodegradable magnesium alloys. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-19 Sachiko Hiromoto,Sayaka Itoh,Naomi Noda,Tomohiko Yamazaki,Hideki Katayama,Takaya Akashi
ABSTRACT Corrosion-control coatings which can enhance bone formation and be completely replaced by bone are attractive for biodegradable Mg alloys. Carbonate apatite (CAp) and hydroxyapatite (HAp) coatings were formed on Mg-4 wt% Y-3 wt% rare earth (WE43) alloy as a corrosion-control and bioabsorbable coating in the coating solution with various concentrations of NaHCO3. The incorporation of carbonate
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Molecular swarm robots: recent progress and future challenges. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-16 Arif Md Rashedul Kabir,Daisuke Inoue,Akira Kakugo
ABSTRACT Recent advancements in molecular robotics have been greatly contributed by the progress in various fields of science and technology, particularly in supramolecular chemistry, bio- and nanotechnology, and informatics. Yet one of the biggest challenges in molecular robotics has been controlling a large number of robots at a time and employing the robots for any specific task as flocks in order
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Quantitative prediction of mixture toxicity of AgNO3 and ZnO nanoparticles on Daphnia magna. Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-16 Min Jeong Baek,Jino Son,Jayoung Park,Yohan Seol,Baeckkyoung Sung,Young Jun Kim
ABSTRACT Once metal-based engineered nanoparticles (NPs) are released into the aquatic environment, they are expected to interact with other existing co-contaminants. A knowledge gap exists as to how the interaction of NPs with other co-contaminants occurs. Here we selected ZnO NPs among various NPs, with Ag ion existing as a contaminant in the aquatic environment by Ag NPs widely used. A novel modeling
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Intermetallic compounds in catalysis – a versatile class of materials meets interesting challenges Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-06-15 Marc Armbrüster
ABSTRACT The large and vivid field of intermetallic compounds in catalysis is reviewed to identify necessities, strategies and new developments making use of the advantageous catalytic properties of intermetallic compounds. Since recent reviews summarizing contributions in heterogeneous catalysis as well as electrocatalysis are available, this contribution is not aiming at a comprehensive literature
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Focus on nanogenerators: toward smart wearable devices Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-02 Jung Ho Kim
(2019). Focus on nanogenerators: toward smart wearable devices. Science and Technology of Advanced Materials: Vol. 20, Nanogenerators, pp. 422-423.
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Bio-inspired nanomaterials for biomedical innovation Sci. Technol. Adv. Mater. (IF 5.799) Pub Date : 2020-07-01 Takanori Akagi, Horacio Cabral, Peng Mi
(2018). Bio-inspired nanomaterials for biomedical innovation. Science and Technology of Advanced Materials: Vol. 19, Bio-inspired nanomaterials, pp. 420-421.