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。
A series of polyurethanes with novel copolymer soft blocks display a new surface phenomenon, contraphilic wetting, in which the dry surface is hydrophilic and the wetted surface is hydrophobic. A precursor polymer was prepared with copolymer soft blocks containing semifluorinated (trifluoroethoxy, 3FOx, or pentafluoro…
The reaction of [(mu3,mu3-EDBP)Li2]2[(mu3-nBu)Li(0.5Et2O)]2 (1) [EDBP-H2 = 2,2'-ethylidenebis(4,6-di-tert-butylphenol)] with 1 equiv of ROH in toluene gave [(mu3,mu3-EDBP)Li2]2[(mu3-OR)Li]2 [R = Bn (2), CH2CH2OEt (3), and nBu (4)]. In the presence of 3 equiv of tetrahydrofuran (THF), the hexanuclear compound 1 slowly…
State-of-the-art generalized gradient approximation (GGA) (PBE, OPBE, RPBE, OLYP, and HCTH), meta-GGA (VSXC and TPSS), and hybrid (B3LYP, B3LYP*, O3LYP, and PBE0) functionals are compared for the determination of the structure and the energetics of the D3 [Co(bpy)3](2+) complex in the (4)A2 and (4)E trigonal component…
A novel approach for the synthesis of cobalt-doped ZnO single-crystalline nanorods based on a wet chemical reaction has been developed. The as-doped ZnO nanorods have a length between 0.3 and 0.6 µm and a diameter between 30 and 60 nm. Structure and composition analyses indicate that the cobalt is incorporated into th…
Dye-infiltrated polymer nanotubes are constructed via a simple vapor deposition polymerization process (see figure). 1D poly(methyl methacrylate) (PMMA) nanofibers doped with two dyes with significant spectral overlap between the donor and the acceptor display special fluorescence resonance energy transfer (FRET) prop…
Zinc oxide thin films have been prepared on different substrates by the sol-gel method using 2-methoxyethanol solution of zinc acetate dihydrate stabilized by monoethanolamine. The photoluminescence spectra of the films show the band-edge and sub-band transitions. The intensity of the band edge emission peak increases…
Abstract A polyoxometalate‐modified titania hybrid electrode with a tailored microstructure is studied for its photoelectrochemical applications. A highly ordered TiO 2 nanotube array is prepared by low‐voltage anodization followed by calcination. Functionalized polyoxophosphotungstate–titania/titanium (POW–TiO 2 /Ti)…
The aim of this study was to demonstrate the feasibility of in vivo cell tracking to monitor anticancer cell therapy by means of a high-resolution noninvasive MRI method. Ovalbumin-specific splenocytes (OT-1) labeled with anionic gamma-Fe2O3 superparamagnetic iron oxide (SPIO) nanoparticles were adoptively transferred…
Molecular dynamics (MD) simulations of β-Ni(OH) 2, α-Ni(OH) 2, and Ni/Al-layered double hydroxides (LDHs) have been performed in order to study structures and binding energies of the materials containing various anions such as CO 3 2 -, SO 4 2 -, OH -, F -, Cl -, Br -, and NO 3 - . We propose a modified force field of…
We report a new approach to convert an electrospun nanofibrous cellulose acetate mat surface from super-hydrophilic to super-hydrophobic. Super-hydrophilic cellulose acetate nanofibrous mats can be obtained by electrospinning hydrophilic cellulose acetate. The surface properties of the fibrous mats were modified from…
We have systematically studied the thin film morphologies of symmetric poly(styrene)-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer after annealing to solvents with varying selectivity. Upon neutral solvent vapor annealing, terraced morphology is observed without any lateral structures on the surfaces.…
A convenient pathway for controlling defect-free nanoscopic domains over large areas is illustrated. A simple rubbing technique is used to align nanocylinders self-assembled in an amphiphilic diblock liquid-crystalline copolymer by introducing novel supramolecular cooperative motions between mesogens and microphase do…
A study of ripple formation on sapphire surfaces by 300-2000 eV Ar+ ion bombardment is presented. Surface characterization by in-situ synchrotron grazing incidence small angle x-ray scattering and ex-situ atomic force microscopy is performed in order to study the wavelength of ripples formed on sapphire (0001) surface…
We have studied the temperature dependent thermopower of gate-defined, lateral quantum dots in the Coulomb blockade regime using an electron heating technique. The line shape of the thermopower oscillations depends strongly on the contributing tunneling processes. Between 1.5 K and 40 mK a crossover from a pure sawtoo…
NMR studies have been carried out on a single crystal sample of TbBaCo2O5.5 with the oxygen-deficient perovskite structure. We have also carried out neutron diffraction studies and added new results to our previously published data. By analyzing these data, the magnetic structures and the spin states of the system, wh…
Unusual emission of light, called the unconventional Smith-Purcell radiation (uSPR) in this paper, was demonstrated from an electron traveling near a finite photonic crystal (PhC) at an ultra-relativistic velocity. This phenomenon is not related to the accepted mechanism of the conventional SPR and arises because the…
The results of the synthesis and characterization of the optimally doped $(\mathrm{La}{)}_{1.4}({\mathrm{Sr}}_{1\ensuremath{-}y}{\mathrm{Ca}}_{y}{)}_{1.6}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7\ifmmode\pm\else\textpm\fi{}\ensuremath{\delta}}$ solid solution with $y=0$, 0.25, and 0.5 are reported. By progressively replacing t…
Many metastable complex fluids such as colloidal glasses and gels show distinct nonlinear viscoelasticity with increasing oscillatory-strain amplitude; the storage modulus decreases monotonically as the strain amplitude increases whereas the loss modulus has a distinct peak before it decreases at larger strains. We pr…
Soft and transparent polymer–clay nanocomposites (see figure), consisting of hydrophobic poly(2-methoxyethylacrylate) and hydrophilic inorganic clay, with a unique clay-network morphology have been synthesized by in situ free-radical polymerization. The nanocomposites exhibit the first observation of abnormal necking…
Producing densely packed arrays of nanoscopic anisotropic objects, while necessary for applications in photovoltaic and field emission devices, presents considerable challenges. Here, we present findings on the phase separation of ligand-functionalized nanorods in a polymer matrix under an applied electric field. Dens…