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。
Abstract Poly(methyl methacrylate) (PMMA) nanocomposites containing an organoclay and triphenyl phosphate (TPP) were prepared by solution blending using a PMMA solution in methyl methacrylate (MMA) solvent. Exfoliated nanostructures were shown by X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The…
We evaluated the thermal conductivity of HfB 2 ‐based ultra‐high‐temperature ceramics from laser flash diffusivity measurements in the 25°–600°C temperature range. Commercially available powders were used to prepare HfB 2 composites containing 20 vol% SiC, some including TaSi 2 (5 vol%) and Ir (0.5 or 2 vol%) addition…
A pi-extended [2-(2-nitrophenyl)propoxy]carbonyl (NPPOC) derivative has been prepared as an efficient UV and near-IR photolabile protecting group for glutamate. This glutamate cage compound exhibits efficient photorelease upon one-photon excitation (epsilonPhi=990 M(-1) cm(-1) at 315 nm). In addition, it also shows ef…
In this work, electrospun tubes of interest for vascular tissue engineering were fabricated and evaluated for burst pressure and suture retention strength (SRS) in the same context as tensile strength providing a direct, novel comparison. Tubes could be fabricated displaying average burst pressures up to 4000 mmHg--we…
Commercially available single-walled carbon nanotubes (SWCNTs) contain large percentages of metal and carbonaceous impurities. These fractions influence the SWCNT physical properties and performance, yet their chemical compositions are not well defined. This lack of information also precludes accurate environmental ri…
The nitrogen-vacancy (NV) center is a paramagnetic defect in diamond with applications as a qubit. Here, we investigate its electronic structure by using ab initio density functional theory for five different NV center models of two different cluster sizes. We describe the symmetry and energetics of the low-lying stat…
Calcium sulfate hemihydrate (CSH) powders were synthesized for use as bone cement by heat treating calcium sulfate dihydrate (CSD) powders in boiling CaCl 2 solutions with various CaCl 2 concentrations, ranging from 23.5 to 35.5 wt%, in order to control their morphology. All of the prepared CSH powders showed X‐ray di…
Nanosized contrast agents have great potential in magnetic resonance molecular imaging applications for clinical diagnosis. This study proposes new nanoparticles spontaneously formed under mild conditions and composed of a noncovalent adduct between a gadolinium complex, a polymer of beta-cyclodextrin (pbetaCD: MW 1.5…
The physicochemical properties of squid skin collagens and biological activity of their enzymatic hydrolysates were determined to produce more value-added materials. The amino acid compositions of the inner and outer squid skin collagens were similar, but distinct from that of bovine tendon collagen in respect to the…
We present a detailed study of the complex dielectric constant and the ferroelectric polarization in multiferroic $\mathrm{Li}\mathrm{Cu}\mathrm{V}{\mathrm{O}}_{4}$ as function of temperature and external magnetic field. In zero external magnetic field, a spiral spin order with an $\mathbf{a}\mathbf{b}$ helix and a pr…
Abstract Melamine salt of tripentaerythriol phosphate (MTP), as a new intumescent flame‐retardant, was prepared from tripentaerythritol (TPE), polyphosphoric acid, phosphoric pentoxide, and melamine, and then incorporated into polypropylene (PP) to obtain flame‐retarded PP‐MTP. FT‐IR analysis showed that MTP was in th…
Abstract The synthesis and characterization of sidewall‐functionalized SWNT derivatives ( n PrNH) n ‐SWNTs containing n ‐propylamine addends is reported. The nucleophilic addition of in situ generated lithium n ‐propylamide to the sidewall of SWNTs and the subsequent reoxidation of charged intermediates of the type (…
This paper studies the vibrational characteristics of double-walled carbon nanotubes (DWNTs) with initial stress using a nonlocal Euler-Bernoulli beam model. Both the effect of initial stress and the effect of small length scale are discussed in detail. The effect of van der Waals forces is incorporated in the formula…
Geometry, electronic structure, and magnetic properties of TMNan (TM=Cr-Ni; n = 4-7) clusters are studied within a gradient corrected density functional theory (DFT) framework. Two complementary approaches, the first adapted to all-electron calculations on free clusters, and the second been on plane wave projector aug…
Hybrid bimetallic nanocobs, comprising a silver nanowire core surrounded by a gold nanoparticle shell linked together by a star polymer with terminal functional groups, revealed a greatly enhanced SERS ability. The SERS enhancement exceeded Raman scattering from isolated silver nanowires by about two orders of magnitu…
In this work plasma etching processes have been studied to roughen and fluorinate polystyrene surface as an easy method to achieve a superhydrophobic slippery character. Radiofrequency discharges have been fed with CF(4)/O(2) mixtures and the effect of the O(2):CF(4) ratio, the input power, and the treatment duration…
Abstract Microencapsulated ammonium polyphosphate (MCU‐APP) with urea–melamine–formaldehyde (UMF) resin is prepared by in situ polymerization, and is characterized by FTIR and XPS. The microencapsulation of APP with the UMF resin leads to a decrease in the particle's water solubility. The flame retardant actions of MC…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNew Design of Shape Memory Polymers: Mixtures of an Elastomeric Ionomer and Low Molar Mass Fatty Acids and Their SaltsR. A. Weiss*†‡, E. Izzo†‡, and S. Mandelbaum†View Author Information Polymer Program and Department of Chemical En…
We report the properties of two new isostructural compounds, U3Bi4Ni3 and U3Bi4Rh3. The first of these compounds is non-metallic, and the second is a nearly ferromagnetic metal, both as anticipated from their electron count relative to other U-based members of the larger 3-4-3 family. For U3Bi4Rh3, a logarithmic incre…
Tweaking the properties of carbon nanotubes is a prerequisite for their practical applications. Here, we demonstrate fine tuning the electronic properties of single-wall carbon nanotubes via filling with ferrocene molecules. The evolution of the bonding and charge transfer within the tube is demonstrated via chemical…