Materials Literature
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Thermal conductivity of thin silicon nanowires (1.4-8.3 nm) including the realistic crystalline structures and surface reconstruction effects is investigated using direct molecular dynamics simulations with Stillinger-Weber potential for Si-Si interactions. Thermal conductivity as a function of decreasing nanowire dia…
A set of symmetric and asymmetric superlattices with ferromagnetic La0.6Sr0.4MnO3 and ferroelectric 0.7Pb(Mg0.33Nb0.67)O3 0.3(PbTiO3) as the constituting layers were fabricated on LaNiO3 coated (100) oriented LaAlO3 substrates using pulsed laser ablation. The crystallinity, magnetic and ferroelectric properties were s…
We report a first-principles study on electronic structures of the deformed armchair graphene nanoribbons (AGNRs). The variation of the energy gap of AGNRs as a function of uniaxial strain displays a zigzag pattern, which indicates that the energy gaps of AGNRs can be effectively tuned. The spatial distributions of tw…
A statistical mechanical framework elucidates the significance of structural correlations between coarse-grained (CG) sites in the multiscale coarse-graining (MS-CG) method (Izvekov, S.; Voth, G. A. J. Phys. Chem. B 2005, 109, 2469; J. Chem. Phys. 2005, 123, 134105). If no approximations are made, then the MS-CG metho…
The Raman spectra of epitaxial thin films of ${\mathrm{La}}_{2}\mathrm{Co}\mathrm{Mn}{\mathrm{O}}_{6}$ on (001)-oriented $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ substrates have been measured in several exact scattering configuration between 12 and $890\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The polarization dependenc…
Heterogeneous oxidation of gas-phase SO 2 on different iron oxides was investigated in situ using a White cell coupled with Fourier transform infrared spectroscopy (FTIR) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The results revealed that adsorbed SO 2 could be oxidized on the surface o…
Hybrids of single-walled carbon nanotubes (SWNTs) and β-cyclodextrins (β-CDs) were prepared by π−π interaction between pyrene modified β-CDs and SWNTs. Moreover, chemically responsive supramolecular SWNT hydrogel was constructed using host−guest interactions by means of hybrids of SWNTs and β-CDs.
Two SiC‐containing metal diborides materials, classified in the ultra‐high‐temperature ceramics (UHTCs) group, were fabricated by hot‐pressing. SiC, sinterability apart, promoted resistance to oxidation of the diboride matrices. Both the compositions, oxidized in air at 1450°C for 1200 min, had mass gains lower than 5…
Gate-modulated transport through partially aligned films of single-walled carbon nanotubes (SWNTs) in thin film type transistor structures are studied experimentally and theoretically. Measurements are reported on SWNTs grown by chemical vapor deposition with systematically varying degrees of alignment and coverage in…
Lock up your gold: Polymer-incarcerated gold nanoclusters (PI Au) were synthesized by microencapsulation of gold nanoclusters and cross-linking using a copolymer based on polystyrene (see TEM image). The nanoclusters could be used to catalyze the aerobic oxidation of alcohols to aldehydes and ketones under atmospheric…
Single-walled carbon nanotubes (SWNTs) exhibit advanced electrical and surface properties useful for high performance nanoelectronics. Important to future manufacturing of nanotube circuits is a large-scale assembly of SWNTs into aligned forms. Despite progress in assembly and oriented synthesis, pristine SWNTs in ali…
This paper describes a topochemical synthetic approach to Co2+-Fe3+ layered double hydroxides (LDHs). Micrometer-sized hexagonal platelets of brucite-like Co2/3Fe1/3(OH)2 were first prepared by a homogeneous precipitation of an aqueous solution of divalent cobalt and ferrous ions through hexamethylenetetramine (HMT) h…
Nuclear hormone receptors (NHRs) represent a diverse class of ligand-dependent transcriptional regulators. NHRs that have been rendered functionally inactive due to mutations that abrogate proper ligand binding can often be rescued by appropriately designed hormone analogues. The analogue-specific receptor-ligand pair…
Polycarbonate (PC) and polydimethylsiloxane (PDMS) rubber blend were made by melt blending using a twin-screw extruder. The blends were characterized by mechanical testing, thermal studies, electrical properties and morphological studies. The notched lzod impact strength increased greatly when the rubber content was 2…
Abstract A novel photocatalyst of iron(II)–tetra(5,6-dichloro-1,4-dithin)porphyrazine (abbreviated as FePz(dtnCl2)4) has been found to exhibit high catalytic activity to activate hydrogen peroxide for oxidative degradation of organic pollutants under visible light irradiation (λ > 420 nm) and wide pH range, in…
The validity of the Wiedemann-Franz law (WFL) for icosahedral quasicrystals belonging to the families AlCu(Fe,Ru) and AlPd(Mn,Re) is discussed. We exploit some characteristic features in the electronic structure in order to obtain closed analytical expressions for the transport coefficients in terms of the Hurwitz zet…
Cashew nut shell liquid (CNSL) is a cheap agro by-product and a renewable resource, which consists mainly of substituted phenols. A CNSL-based reactive resin was used in this study as binder for particleboards. The resin was prepared by heating a mixture of CNSL, phenol, and hexamethylenetetramine. Properties of the b…
Poly(3-hydroxy)butyrate (PHB) is a microbial polyester, which provides the advantages of biodegradability and biocompatibility but it is brittle and has low abilities for some chemical modifications. To overcome such problems reactive blending was done with a glassy acrylic polymer, poly(methylmethacrylate) (PMMA) wit…
Collisional energy transfer at the surface of poly(methyl methacrylate) thin films on $\mathrm{Si}{\mathrm{O}}_{x}∕\mathrm{Si}$ was investigated using low-energy neutral helium atom scattering. Analysis of spectra in two scattering regimes yields results consistent with the hypothesis that thinner films are stiffer, s…
This numerical study investigates the effect of cross section geometry on the bending of a beam and also buckling of a column made of shape memory alloy (SMA). It incorporates superelastic SMA's non-linear stress—strain relations, including the non-symmetric behavior in tension and compression. Primarily, an arbitrary…