Materials Literature
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Two new water-soluble gold nanoparticles (AO-TEG-Au and AO-PEG-Au NPs) are prepared and characterized. They are stabilized by thioalkylated oligoethylene glycols and functionalized with fluorescent Acridine Orange (AO) derivatives. Despite the different core sizes (11.8 and 3.9 nm respectively) and shell composition,…
Dendrimers are polybranched and polyfunctionalized tree-like polymers. Unlike linear polymers, they have perfectly defined structure and molecular weight, due to their iterative step-by-step synthesis. Their multivalent structure and supramolecular properties have made them attractive nanotools for applications, parti…
We report the rare observation of an irreversible transformation from a chiral to an achiral crystal through the syntheses of two polymorphs of K[Co(HCOO)(3)], and their characterization using single and powder crystal X-ray diffractions, infrared spectroscopy, thermal analyses, and the study of their magnetic propert…
We demonstrate synthesis of tin-doped indium oxide (ITO) nanorods on 2-in. glass wafers via radio frequency (rf)-magnetron sputtering deposition. The nanorods possessed a single-crystal structure of bixbyite, grew along the <100> orientation of the cubic unit cell, and were vertically aligned to the substrates. Height…
A new type of gradient-index (GRIN) metamaterial (MTM), composed of a dielectric post array (DPA), is proposed for millimeter-wave applications to achieve wideband, low-reflection characteristics, and low sensitivity to the polarization of the incident wave. The design concept is different from that followed in GRIN,…
We investigate with nonreactive molecular dynamics simulations the dynamic response of phenolic resin and its carbon-nanotube (CNT) composites to shock wave compression. For phenolic resin, our simulations yield shock states in agreement with experiments on similar polymers except the “phase change” observed in experi…
Phase transformation of solid solution decomposition occurring in a 96 at%Mg-4 at%Dy alloy, which was solution-treated at 540°C and subsequently aged at 250°C for various lengths of time, has been investigated by conventional transmission electron microscopy (TEM) in combination with high-angle annular detector dark-f…
This paper demonstrates that gliadin-free wheat glutenin can be an excellent biomaterial for tissue-engineering applications, better than poly(lactic acid) (PLA). Although plant proteins are more readily available than collagen and silk, limited studies have been conducted on understanding the potential of using plant…
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金属材料の水素脆性の本質を理解するためには，水素存在状態，変形過程における水素の動的挙動，格子欠陥形成促進，破壊に至る過程を解明することが重要である．本稿では種々の金属材料における水素トラップサイト同定，転位と水素の相互作用検出，水素とひずみによる格子欠陥（原子空孔および空孔クラスター）形成促進について解説する．さらに，塑性変形が関与する水素脆性との関係を解説する．
Available data concerning Wet Air Oxidation heterogeneous catalyst deactivation were collected and discussed in this review article. Deactivation mainly takes place through catalyst oxidation (overoxidation, superficial oxidation of metal particles, leaching), sintering and fouling. Only some of these phenomena appear…
A Liposome is spherical, self closed vesicles of colloidal dimensions, in which phospholipids bilayer sequesters part of the solvent, in wh ich i t freely float, into i t s interior . L iposome technology has progressed from conventional vesicles (first - generation liposom e) to second - generation liposome, in which…
Based on mineralogical and technological investigations of the deposit 'Greda' important characteristics of bentonite clay were determined. Representative samples of the deposit were characterized with X-ray diffraction, low-temperature nitrogen adsorption, chemical analysis, differential thermal analysis and scanning…
INTRODUCTION: Drug delivery systems could induce cellular toxicity as side effect of nanomaterials. The mechanism of toxicity usually involves DNA damage. The comet assay or single cell gel electrophoresis (SCGE) is a sensitive method for detecting strand damages in the DNA of a cell with applications in genotoxicity…
Metal-Enhanced Fluorescence (MEF) effects from different density silver island films (SiFs) and the effects of far-field excitation irradiance on the observed enhancement of fluorescence were studied. It is shown that MEF non-linearly depends on silver nanoparticle (NP) size/density, reaching a maximum value for SiFs…
Two platinum(II) terpyridyl-based metallo-supramolecular triblock copolymers, [ClPt(tpy)PEO-PPO-PEO(tpy)PtCl](OTf)(2) (1) and [(Ph-C≡C)Pt(tpy)PEO-PPO-PEO(tpy)Pt(C≡C-Ph)](OTf)(2) (2), have been synthesized and characterized. The two complexes were found to aggregate with PtPt and/or π-π interactions at high temperature…
Obtaining shape and size control of strongly correlated materials is imperative to obtain a fundamental understanding of the influence of finite size and surface restructuring on electronic instabilities in the proximity of the Fermi level. We present here a novel synthetic approach that takes advantage of the intrins…
The solvothermal reactions (at 180 °C for 48 h) of a mixture of lanthanide chlorides (Nd, Eu) with the tridendate heterocyclic nitrogen ligand, 2,2':6',2''-terpyridine (terpy), in ethanol medium give rise to the formation of crystalline mixed chloro-hydroxo-aquo complex Ln(2)Cl(5)(OH)(H(2)O)(terpy). Its crystal struct…
Biocompatible gold nanoparticles have gained considerable attention in recent years for potential applications in bio-diagnostics, gas sensing, catalysis, and nanomedicine due to their interesting size-dependent properties. In the present work a chemical reduction method is used to produce gold nanoparticles with diff…
Polymeric nanocomposites consist of nanoparticles imbedded in organic polymers, comprising a new class of materials. The combination of conducting nanoparticles and conducting polymers, described as hybrid electrically conducting nanocomposites, is a new emerging field. These materials may exhibit unprecedented proper…