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 velocity field in the vicinity of a laser-generated cavitation bubble in water is investigated by means of particle tracking velocimetry (PTV). Two situations are explored: a bubble collapsing spherically and a bubble collapsing aspherically near a rigid wall. In the first case, the accuracy of the PTV method is a…
Abstract The effect of the addition of microcrystalline cellulose nanofibers into linear segmented polyurethanes (SPU) was investigated. The polymers were synthesized with 4,4‐methylene‐bisphenyldiisocyanate (MDI) and poly(tetramethyleneglycol) (PTMG) with 1,4‐butanediol (BD) as chain extender. The nanocrystals were i…
The thermal conductance of nanoscale phonon modes is typically calculated using the Boltzmann transport equation. A particular implementation of this method is the acoustic mismatch model (AMM) that compares impedance ratios at a mathematically abrupt transition between two equilibrium regions. The shortcomings of thi…
Joule heating in single-walled carbon nanotubes (CNTs) using a quantum mechanical approach is presented in this paper. The modeling is based on the energy transfer between the electrons and both acoustic and optical phonons. In this formulation, only the knowledge of the full energy dispersion relation, phonon dispers…
To avoid molecular damage of biomolecules due to oxidation, all cells have evolved constitutive and responsive systems to mitigate and repair chemical modifications. Archaea have adapted to some of the most extreme environments known to support life, including highly oxidizing conditions. However, in comparison to bac…
Abstract 1‐Butyl‐3‐methylimidazolium chloride ([BMIM]Cl) was used as a solvent for cellulose, the rheological behavior of the cellulose/[BMIM]Cl solution was studied, and the fibers were spun with a dry‐jet–wet‐spinning process. In addition, the structure and properties of the prepared cellulose fibers were investigat…
Near-infrared quantum cutting phenomenon has been demonstrated in Pr3+–Yb3+-codoped NaYF4 microcrystals synthesized by a facile hydrothermal route, which involves the emission of two near-infrared photons from an absorbed blue photon via a cooperative downconversion process. The Pr3+–Yb3+ energy transfer mechanisms ha…
A series of monomethoxy poly(ethylene glycol)-poly(lactide) (mPEG-PLA) diblock copolymers were synthesized, and mPEG-PLA micelle was fabricated and used as a nanocarrier for solubilization and delivery of a promising anticancer drug ethaselen. Ethaselen was efficiently encapsulated into the micelles by the dialysis me…
The role of chemical enhancement in surface-enhanced Raman scattering (SERS) remains a contested subject. We study SERS spectra of 4-mercaptopyridine molecules excited far from the molecular resonance, which are collected from individual electromagnetic hot spots at concentrations close to the single-molecule limit. T…
We demonstrate that the KPb m SbTe 2+ m system (PLAT- m for tellurium, antimony, lead potassium, m = 19−21) of materials exhibits high thermoelectric performance. Samples with compositions K 1− x Pb m +δ Sb 1+γ Te m+2 were prepared using several combinations of x, δ, γ and m and their thermoelectric properties were in…
This study examines the use of transition-metal hydride complexes that can be generated by the heterolytic cleavage of H(2) gas to form B-H bonds. Specifically, these studies are focused on providing a reliable and quantitative method for determining when hydride transfer from transition-metal hydrides to three-coordi…
It won′t overstay its welcome: Metal ions trigger the rapid assembly of a triple-helical collagen-based peptide with ligands at the ends and center into a fibrous three-dimensional mesh under physiological conditions (see picture). Importantly for applications in regenerative medicine, a mild chelating agent causes ra…
Abstract The structural and magnetic properties of ferromagnetic nanotubes fabricated by a low cost electrodeposition method are investigated. The fabrication of various elemental ferromagnetic materials are described, such as Fe, Co, and Ni, and ferromagnetic alloys, such as NiFe, CoPt, CoFeB, and CoCrPt nanotube arr…
The type III secretion system (T3SS) exports proteins from the cytoplasm, through both the inner and outer membranes, to the external environment. Here, a system is constructed to harness the T3SS encoded within Salmonella Pathogeneity Island 1 to export proteins of biotechnological interest. The system is composed of…
We present a comprehensive study of the magnetic and microwave properties of piezoelectric BaTiO3/magnetostrictive Ni nanocomposites (NCs), fabricated under uniaxial compression, at room temperature. In the current work, we investigated samples in the compositional range between 0≤fNi≤33.5 vol % and from 0.1 to 6 GHz…
In this work we present a magnetic, structural, and electron spin resonance (ESR) study of the geometrically frustrated ${\text{MnCr}}_{2}{\text{O}}_{4}$ spinel in an extended range of $T$ (2--1000 K). At the lowest temperature $(T<18\text{ }\text{K})$ the ESR lineshape is compatible with the coexistence of spiral…
We synthesized fluorescent, porphyrin-anchored, Au(22) clusters in a single step, starting from well-characterized Au(25) clusters protected with glutathione (-SG) by a combined core reduction/ligand exchange protocol, at a liquid-liquid interface. The prepared cluster was characterized by UV/vis, photoluminescence, X…
The effect of Mn doping on crystal structure, electric and magnetic properties of BiFeO3 thin films prepared via a chemical deposition method on (111) Pt/Ti/SiO2/Si substrates was studied. The substitution of Fe ions by a small amount (5%) of Mn ions could facilitate the stabilization of Fe3+ in BiFeO3 thin films, whi…
In this study, a detailed investigation of the nonlinear optical properties of a spherical quantum dot (QD) containing one and two electrons has been carried out. First, intersublevel linear, third-order, and total absorptions of both single- and double-electron QDs have been investigated for cases with (i.e., D0 and…
The frequency and temperature dependences of the dielectric constant and the electrical conductivity of the transparent glasses in the composition Li2O–3B2O3 were investigated in the 100 Hz–10 MHz frequency range. The dielectric constant and the loss in the low frequency regime were electrode material dependent. Diele…