Materials Literature
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An ultra-broadband multilayered graphene absorber operating at terahertz (THz) frequencies is proposed. The absorber design makes use of three mechanisms: (i) The graphene layers are asymmetrically patterned to support higher order surface plasmon modes that destructively interfere with the dipolar mode and generate e…
Nanoporous metal materials with many potential applications have been synthesized by a chemical dealloying approach. The fabrication of nanoporous metal nanoparticles (NPs), however, is still challenging due to the difficulties in producing suitable nanoscale precursors. Herein, nanoporous Co NPs of 31 nm have been su…
Much attention has been paid to exploring electrode materials with enhanced supercapacitor performance as well as relatively low cost and environmental friendliness. In this work, NiMoO4 nanospheres and nanorods were synthesized by facile hydrothermal methods. The hierarchical NiMoO4 nanospheres were about 2.5 μm in d…
Nanoparticles have recently emerged as a promising class of carriers for the co-delivery of multiple drugs. Combination therapies of small-molecule drugs are common in clinical practice, and it is anticipated that packaging into single macromolecular carriers will enable drug release in precisely balanced ratios and r…
Reduction of the bit size in conventional magnetic recording media is becoming increasingly difficult due to the superparamagnetic limit. Bit patterned media (BPM) has been proposed as a replacement technology as it will enable hard disk areal densities to increase past 1 Tb in −2 . Block copolymer directed self-assem…
Thermoelectrics is a challenging issue for modern and future energy conversion and recovery technology. Carbon nanotubes are promising active thermoelectic materials owing to their narrow bandgap energy and high charge carrier mobility, and they can be integrated into flexible thermoelectrics that can recover any wast…
Environment‐friendly lead‐free piezoelectric ceramics have been studied extensively in the past decade with great progress particularly in systems based on a niobate perovskite compound formulated as ( K , Na ) NbO 3 (abbreviated as KNN ). A comprehensive review on the latest development of KNN ‐based piezoelectric ce…
Crystal defects in diamond have emerged as unique objects for a variety of applications, both because they are very stable and because they have interesting optical properties. Embedded in nanocrystals, they can serve, for example, as robust single-photon sources or as fluorescent biomarkers of unlimited photostabilit…
실크 피브로인과 poly(vinyl alcohol)(PVA)는 뛰어난 생체적합성과 수용성을 가져 생체의학 분야에서 주목하는 재료이다. 본 연구에서는 실크 피브로인과 PVA를 초음파와 동결/융해 방법으로 드레싱제로서 사용 가능한 하이드로젤을 제조하고자 하였다. 실크와 PVA를 100/0, 75/25, 50/50, 25/75, 0/100 비율로 혼합하였다. 제작한 하이드로젤을 FE-SEM, TGA, FTIR, 압축 강도 측정 등을 통해 물성을 분석하였다. 실크/PVA 하이드로젤은 PVA 함량이 증가할수록 공극 크기와 팽윤도는 감소하였으며, 젤의 강도는 증가하였다. PV…
In this study, roofing sheets were produced from agricultural wastes such as corn cobs and cassava stalks using animal and PVC glue as binders. The sheets were produced using different combinations of the agro- wastes and adhesives. Physical properties of the sheets produced such as percentage water absorption (WA) an…
The influence of current collector on the sudden deterioration phenomena of conventional nickel-yttria-stabilized zirconia composite solid oxide fuel cell (SOFC) anodes operated in hydrogen with high humidity concentration is investigated. Current collectors of different materials have been tested within different con…
배향된 상태에서 복굴절이 없는 zero-<TEX>${\Delta}$</TEX>n 재료를 개발할 목적으로 용융혼합된 폴리락타이드(PLLA, (+)복굴절)/폴리(메틸 메타크릴레이트)(PMMA, (-)복굴절) 블렌드의 상용성과 PMMA의 공단량체인 메틸 아크릴레이트(MA)가 PLLA와의 상용성에 미치는 영향을 살펴보았다. MA 함량에 상관없이 모든 블렌드에서 조성에 따라 변하는 단일 <TEX>$T_g$</TEX>와 90% 이상의 투명도가 관찰되었으며, 이로부터 용융혼합된 PLLA/PMMA 블렌드는 분자수준에서 상용성을 보임을 확인하였다. 이들 블렌드는 <TEX>$280^…
Theoretical understanding of the stability, ferromagnetism, and spin polarization of Mn5Ge3 clusters has been performed by using the density functional theory with generalized gradient approximation for exchange and correlation. The magnetic moments and magnetic anisotropy energy (MAE) have been calculated for both bu…
Abstract The reactions of Bi(NO 3 ) 3 · 5H 2 O or Sm(NO 3 ) 3 · 6H 2 O with oleum (65 % SO 3 in conc. H 2 SO 4 ) and the pyridine (Py) complex Py · SO 3 in the ionic liquid 1‐butyl‐3‐methylimidazolium hydrogen sulfate, [bmim][HSO 4 ], yielded single crystals of (C 5 H 6 N)Bi(S 2 O 7 ) 2 and (C 5 H 6 N) 3 Sm(S 2 O 7 )…
Abstract Anisometrische SiO 2 ‐Suprapartikel werden durch einfache Verdunstung einer Dispersion von pyrogenem Siliciumdioxid in Wassertropfen auf einer superhydrophoben Oberfläche erhalten. Die Form der Suprapartikel wird unmittelbar durch die Salzkonzentration (NaCl) kontrolliert. Oberhalb einer Grenzkonzentration we…
Abstract From Fe 3 Si/FeSi 2 artificial lattices, wherein Fe 3 Si layers are partially epitaxially grown from the first layer on Si(111) up to the top layer across the FeSi 2 layers with the same orientation relationship as that in the first layer, current‐perpendicular‐to‐plane (CPP) structures that partially contain…
A small amount of high molecular weight molecules can have a dramatic influence on the flow‐induced crystallization kinetics and orientation of polymers. To elucidate the effects of the high molecular weight component under a real processing process, we prepared model blends in which high density polyethylene with a h…
You might think all glasses are the same—that they are all viscous amorphous materials somewhere between solids and liquids. In fact, many glass-forming liquids fall into two categories: “strong” and “fragile.” As the temperature T is reduced, the viscosity of strong glasses like SiO2 increases as exp(∆/T ), where ∆ c…
This work investigates the symmetry properties of single-wall carbon nanotubes and their structural analogs, which are nanotubes consisting of different kinds of atoms. The symmetry group of a nanotube is studied by looking at symmetries and color fixing symmetries associated with a coloring of the tiling by hexagons…
The dynamics of two- and five-disk systems confined in a square has been studied using molecular dynamics simulations and compared with the predictions of transition state theory. We determine the partition functions Z and Z(‡) of transition state theory using a procedure first used by Salsburg and Wood for the pressu…