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。
Highly luminescent zinc(II)-bis(8-hydroxyquinoline) (Znq(2)) complex nanorods have been synthesized via a sonochemical route from the microemulsion containing zinc acetate and 8-hydroxyquinoline. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images showed that the products were rod-…
A computational study using the B3LYP/6-31G(d) level of theory shows that the chemisorptions of one and two hydrogen atoms on the external surface of (3,3), (4,4), (5,5), and (6,6) armchair single-walled carbon nanotubes (SWNTs) are exothermic processes. Our results clearly indicate that two hydrogen atoms favor bindi…
Transparent glass-ceramics containing β-Ga 2 O 3:Ni 2+ nanocrystals were synthesized and characterized by X-ray diffraction, transmission electron microscopy, and electron energy loss spectroscopy. Intense broad-band luminescence centering at 1200 nm was observed when the sample was excited by a diode laser at 980 nm.…
In this work, the lateral mobility of polyelectrolyte multilayers was investigated by means of the fluorescence recovery after photobleaching (FRAP) technique, with special attention to the effect of relevant parameters during and after preparation. Different polyelectrolytes with respect to charge density, stiffness,…
Abstract Two types of mixtures were prepared by solution blending: high molecular weight polyhydroxybutyrate (PHB)/poly( ε ‐caprolactone) (PCL) and PHB/low molecular weight chemically modified PCLs (mPCL). The morphology, crystallization, and enzymatic degradation of the blends were studied by differential scanning ca…
Equilibrium molecular dynamics simulations on amorphous polymers filled with solid nanoparticles show that mechanical reinforcement results from the formation of a long-lived transient polymer−particle network only over a narrow range of parameter space. In these cases it is necessary that (i) the interfacial zone occ…
Abstract Zein fibers have been produced by electrospinning from acetic acid, aqueous methanol, ethanol and isopropyl alcohol. Alcohol solutions produced fibers that were predominantly ribbons. Fibers spun from acetic acid solution have a round morphology with a narrower distribution of diameters when spun under suitab…
Colloidal zinc oxide (ZnO) quantum dots (QDs) with a uniform particle size of around 5 nm have been synthesized, purified and blended with polymethylmethacrylate (PMMA) by solution mixing to prepare PMMA/ZnO nanocomposite films. The structure and morphology of ZnO QDs and PMMA/ZnO nanocomposite films have been charact…
Abstract Disubstituted poly(3,4‐propylenedioxythiophene)s (PProDOTs) exhibit large electrochromic contrasts in the near infrared (NIR) while showing essentially no color change in the visible region when incorporated into a reflective device platform. The source of this is attributed to a conductive front that propaga…
North Carolina State University Theses Chemical Engineering.
Ce 3+ -doped YAG nanoparticles have been synthesized at relatively low temperatures by the co-precipitation and polymer-assisted sol–gel methods and characterized by Fourier transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD) and x-ray absorption near-edge structure (XANES) measurements. Calcination of th…
Microstructures built into the surfaces of an optic or window, have been shown to suppress the reflection of broad-band light to unprecedented levels. These antireflective (AR) microstructures form an integral part of an optic component, yielding an AR property that is as environmentally robust, mechanically durable,…
Magnetic switching of a single molecular magnet (SMM) due to spin-polarized current flowing between ferromagnetic metallic leads (electrodes) is investigated theoretically. Magnetic moments of the leads are assumed to be collinear and parallel to the magnetic easy axis of the molecule. Electrons tunneling through the…
The wide bandgap and large exciton binding energy of ZnO may generate new applications in bio-imaging after careful surface modifications. Formation of chemically pure ZnO colloidal nanocrystals with controlled size without unwanted by-products or agglomeration has been the major challenge to fully utilize ZnO’s uniqu…
In this paper we present large-scale correlated calculations of linear optical absorption spectrum of oligo-acenes containing up to seven benzene rings. For the calculations we used the Pariser-Parr-Pople (P-P-P) Hamiltonian, along with the configuration interaction (CI) technique at various levels such as the full CI…
We study ion condensation onto a patterned surface of alternating charges. The competition between self-energy and ion-surface interactions leads to the formation of ionic crystalline structures at low temperatures. We consider different arrangements of underlying ionic crystals, including single ion adsorption, as we…
Dense granular matter has to expand in order to flow, a phenomenon known as dilatancy. Here we perform, by means of Magnetic Resonance Imaging, direct measurements of the evolution of the local packing density of a slow and smooth granular shear flow generated in a split-bottomed geometry. The dilatancy is found to be…
The structural and magnetic properties of V doped ZnO are presented. V ions were introduced into hydrothermal ZnO single crystals by ion implantation with fluences of 1.2×1016–6×1016cm−2. Postimplantation annealing was performed in high vacuum from 823to1023K. The ZnO host material still partly remains in a crystallin…
Mesostructured non-silicate oxides, with well-defined organization on the 2-50 nm size scale, may play a pivotal role in advancing vital disciplines such as catalysis, energy conversion, and biotechnology. Herein, we present selected methodologies for utilizing the sol-gel process, in conjunction with organic-directed…
We have demonstrated glutathione- and cysteine-induced transverse overgrowth on gold nanorods. In aqueous solutions, glutathione and cysteine are preferentially bound to the ends of gold nanorods that are stabilized by a cationic surfactant bilayer. This preferential end binding blocks the growth of the nanorods in th…