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。
The optical functions of strontium titanate (SrTiO 3 ) (STO) single crystals were determined with spectroscopic ellipsometry in the 1–6 eV spectral region and the 4.2–300 K temperature region. On approaching the band gap edge, the optical absorption shows Urbach tail behavior followed by the onset of indirect optical…
Abstract Detailed knowledge of the transport properties of nanoporous materials is a prerequisite for their complete characterization and optimum technological exploitation. One of the best ways to attain this information is provided by the “microscopic” techniques of diffusion measurement, in particular by the pulsed…
A series of linear−dendritic copolymers were synthesized by conjugating BE block copolymers (B 8 E 41 and B 16 E 42, B = 1,2-butylene oxide and E = ethylene oxide) with G1−3 PAMAM dendrimers via carbamate bonds. The critical micelle concentrations of the dendrimer conjugates were less than 0.11 mmol dm −3 . Light scat…
We construct an effective spin model from the coupled spin-fermion problem appropriate to double perovskites of the form ${A}_{2}B{B}^{\ensuremath{'}}{\text{O}}_{6}$. The magnetic model that emerges is reminiscent of double exchange and we illustrate this ``reduction'' in detail for the case of perfect $B\text{\ensure…
Here we report the fabrication of magnetically responsive calcium carbonate microcrystals produced by coprecipitation of calcium carbonate in the presence of citrate-stabilized iron oxide nanoparticles. We demonstrate that the calcite microcrystals obtained possess superparamagnetic properties due to incorporated magn…
Oxygen transport characteristics, i.e., permeability, diffusivity, and solubility, have been determined for a variety of photopolymerized thiol−ene networks. Despite the abundance of thiol−ene research and the importance of such information, it is until now absent from the literature. One model network, which showed h…
We report a new approach to study the kinetics of ligand exchange on colloidal gold nanoparticles, where the coordination and dissociation of surface ligands could be monitored in situ by surface-enhanced Raman scattering.
In ultra-deep submicrometer (UDSM) technologies, the current paradigm of using copper (Cu) interconnects for on-chip global communication is rapidly becoming a serious performance bottleneck. In this paper, we perform a system level evaluation of Carbon Nanotube (CNT) interconnect alternatives that may replace convent…
UNLABELLED: A newly developed route for the synthesis of hollow carbon nanospheres without introducing template under hydrothermal conditions was reported. Hollow carbon nanospheres with the diameter of about 100 nm were synthesized using alginate as reagent only. Many instruments were applied to characterize the morp…
Semi-synthetic, proteolytically degradable polymer hydrogels have proven effective as scaffolds to augment bone and skin regeneration in animals. However, high costs due to expensive peptide building blocks pose a significant hurdle towards broad clinical usage of these materials. Here we demonstrate that tri-amino ac…
The integration of zinc oxide (ZnO) and cadmium sulfide (CdS) has shown promise in applications such as sensing and photovoltaics. We describe here a room temperature, aqueous synthetic strategy to selectively grow nanocrystalline CdS on ZnO. In particular, we describe an experimentally simple process that selectively…
Existence and uniqueness for infinitesimal dislocation based rate-independent gradient plasticity with linear isotropic hardening and plastic spin are shown using convex analysis and variational inequality methods. The dissipation potential is extended non-uniquely from symmetric plastic rates to non-symmetric plastic…
Gemcitabine hydrochloride is an anticancer nucleoside analogue indicated in clinic for the treatment of various solid tumors. Although this drug has been demonstrated to display anticancer activity against a wide variety of tumors, it is needed to be administered at high doses to elicit the required therapeutic respon…
We present a theoretical scheme that seamlessly handles the crossover from fully ballistic to diffusive thermal transport regimes and apply it to carbon nanotubes. At room temperature, micrometer-length nanotubes belong to the intermediate regime in which ballistic and diffusive phonons coexist. According to our schem…
The liquid dynamics of 5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrile, named ROY for its red, orange, and yellow crystal polymorphs, was characterized by dielectric spectroscopy and differential scanning calorimetry. Four of these polymorphs show fast "diffusionless" crystal growth at low temperatures while…
Silver nanoplates (NPTs) were prepared by a seed-mediated growth method with different diameters ( d = 25, 32, 53, and 100 nm) and with thicknesses of approximately 10 nm in all cases. As the concentration of silver seeds increased, the diameter of the nanoplates increased, resulting in an overall shift in the localiz…
Nanoporous thin-film samples, fabricated from degradable block copolymers, polystyrene-b-poly(l-lactide) (PS-PLLA), were utilized as templates for the formation of ordered nanoarrays. This work elucidates the feasibility of using such nanoporous PS templates as coatings on implantable devices for drug delivery through…
We evaluated the radiative lifetimes and the one-dimensional exciton coherence lengths in single-walled carbon nanotubes (SWNTs). The radiative lifetimes determined from simultaneous measurements of photoluminescence (PL) lifetimes and PL quantum yields range from $\ensuremath{\sim}3$ to 10 ns, and slightly increase w…
Diamond is a promising material for high-power and low-loss semiconductor devices. However, the reported reverse blocking electric field of diamond-based power devices is as low as 2 MV/cm, and their performance is worse than ideal. We have developed reach-through-type Schottky barrier diodes (SBDs) with various Schot…
We report the formation of stable nanoparticle−polymer clusters obtained by electrostatic complexation. The nanoparticles placed under scrutiny were nanoceria (CeO 2 ) coated with short poly(acrylic acid) moieties, whereas the polymers were cationic-neutral block copolymers. The cluster formation was monitored using d…