Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We review our recent theoretical works on the the quantum spin Hall effect. First we compare edge states in various 2D systems, and see whether they are robust or fragile against perturbations. Through the comparisons we see the robust nature of edge states in 2D quantum spin Hall phases. We see how it is protected by…
A variety of fish and cephalopods use tunable 1D photonic crystals to signal and display information. These animals control the color of the reflectors through chemical secretion by the sympathetic nervous system, which reduces the distance between platelets in reflective cells. This control can be mimicked by a bioin…
Thermally driven reversible emission switching between different colors and solid-phase transformation are investigated for two aromatic-amine compounds bearing trifluoromethyl (CF3) groups. The phase-dependent emission properties are attributed to the different molecular packing properties and changeable molecular ge…
Tetragonal barium yttrium fluoride (BaYF 5 ) nanocrystals doped with 0.5 mol % Tm 3+ and 15 mol % Yb 3+ (BaYF 5:Tm 3+, Yb 3+ ) were synthesized using the thermal decomposition method yielding rectangular-shaped nanocrystals (15 nm × 5 nm) that can (up)convert near-infrared light to higher energies such as blue, via a…
In this work, oxygen-containing groups were introduced onto multiwall carbon nanotubes (MWCNTs) by using microwave-excited Ar/O 2 surface-wave plasma (SWP) treatment. The changes of the atomic contents and structure properties of MWCNTs as a function of gas flow rate, treatment time, and plasma power were analyzed usi…
One of the main goals of nanomedicine is to develop a nanocarrier that can selectively deliver anticancer drugs to the targeted tumors. Extensive efforts have resulted in several tumor-targeted nanocarriers, some of which are approved for clinical use. Most nanocarriers achieve tumor-selective accumulation through the…
Monodisperse Fe3O4 nanoparticles are synthesized by a much simplified method of reductive decomposition of iron acetylacetonate in benzyl ether and oleylamine. The Fe3O4 nanoparticles are catalytically active for CVD growth of 1D boron nanowires.
The interactions between four different graphenes (including pristine, B- or N-doped and defective graphenes) and small gas molecules (CO, NO, NO(2) and NH(3)) were investigated by using density functional computations to exploit their potential applications as gas sensors. The structural and electronic properties of…
Ultrathin boron nitride nanosheets are fabricated and detailed morphological and structural microscopic studies of are carried out. Polymeric composites containing BN nanosheets exhibit a remarkable reduction of the coefficient of thermal expansion (CTE) and possess enhanced elastic modulus and strength.
The protection power of the cationic surfactant decylammonium acetate (DAA) in seawater has been studied to define the perfect conditions have to be found for using it as a corrosion inhibitor for copper surface. The adsorption isotherm of this surfactant on copper surface has been determined at different interval tim…
We present a comparative study on the quantum size effects in CdS and CdSe spherical dots, using first-principles derived semi-empirical pseudopotential method. Various properties including single-particle energy levels, characterization of individual electron wave functions, interband and intraband transitions, elect…
There is controversy about the persistence or not of the relaxor state in the nanoscale. We report here the dielectric properties of nanostructured ceramics of the Pb(Zn1/3Nb2/3)O3–Pb(Fe1/2Nb1/2)O3–PbTiO3 ternary system with an average grain size of 20 nm, which clearly indicate that it persists as long as correlation…
This study evaluated cement-based composites reinforced with cellulose fibers. The production of composites in laboratory scale is an adaptation of industrial processes for fiber-cement manufacturing. The physical and mechanical behaviors were evaluated using macroscopic properties, considered to be important when tha…
Is it possible to form few-layer graphene by direct merging single-walled carbon nanotubes (SWNTs), which are generally regarded as rolled single-layered graphene? In this study, we reported the structure transformation of SWNTs to few-layer graphene assisted by the encapsulated ferrocene molecules. High resolution tr…
A kind of emulsifier-free latex (FL) was successfully synthesized from styrene (St) and butyl acrylate (BA) with 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as a reactive emulsifier. The particle size of latex particles, stability against electrolytes, minimum film forming temperature (MFT) and water contact an…
We have synthesized luminescent nanoparticles comprising a core of lanthanide complexes and shells of amorphous silica using reverse micelles as nanoreactors. 3-Hydroxypicolinate complexes of Eu(III), Tb(III), and the corresponding heteronuclear complexes have been investigated as the photoactive cores. The size of th…
Heterogeneous Co−saponite was found to be an efficient catalyst for the liquid phase oxidation of p- cresol under mild conditions. Divalent cobalt ions were found to be in both the tetrahedral and octahedral positions of the saponite clay. Studies on the effect of reaction parameters showed that the rate of reaction i…
Nonplanar field emission from electrochemically etched tungsten field emitters has been observed using near field emission scanning electron microscopy. Close-proximity field emission in adequate ultrahigh vacuum conditions was implemented to attain Fowler–Nordheim plots using typical imaging parameters. The emission…
Herein we report the anisotropic carrier transport properties of a layered cobaltate, NaxCoO2 epitaxial film grown on the m-plane of an α-Al2O3 substrate using reactive solid-phase epitaxy. Scanning and transmission electron microscopy analyses revealed that NaxCoO2 was heteroepitaxially grown with the CoO2 conducting…
A novel series of nonionic amino acid Schiff-Bases were synthesized and characterized using different spectroscopic tools to elucidate their chemical structures. The surface and thermodynamic properties of these compounds were studied using classical measurements including surface and interfacial tension and emulsific…