Materials Literature
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Evaluation of the potential hazard of man-made nanomaterials has been hampered by a limited ability to observe and measure nanoparticles in cells. A FACSCalibur™ flow cytometer was used to measure changes in light scatter from cells after incubation with TiO(2) nanoparticle. Both the side scatter and forward scatter c…
Porous silicon (PS) layers were fabricated on n-type crystalline silicon (c-Si) wafers of (100) and (111) orientations using photoelectrochemical etching (PECE) process at etching time of 20 min, current density of 60 mA/cm2, and fixed electrolyte solution HF:C2H5OH (1,4). Moreover, PS layers fabricated on p-type c-Si…
By exerting sandblasting onto copper surfaces, we show that increasing the surface roughness can effectively promote CuO nanowire formation by significantly enhancing the nanowire growth density and length during the oxidation of copper. It is found that the enhanced nanowire nucleation and growth is associated with t…
I report a facile wet-chemical method for the synthesis of one-dimensional copper hydroxide nitrate nanostructures in 2-propanol under solvothermal conditions. Single-crystalline nearly monodispersed copper hydroxide nitrate nanorods and nanobelts with selected breadths in the range of 100 nm to 1 μm have been success…
This paper presents a general and feasible method for the fabrication of uniform hollow mesoporous nanocomposite silica spheres (HMNSs) loaded with functional nanoparticles (Au, Pt, Fe3O4, etc.) on their inner walls. In this approach, carboxylic-capped polystyrene (PS) spheres were first synthesized by a soap-free emu…
An [Fe(III)(biuret-amide)] complex has been immobilized onto mesoporous silica nanoparticles via Cu(I) catalyzed azide-alkyne click chemistry. This hybrid material functions as an efficient peroxidase mimic and was successfully used for the quantitative determination of hydrogen peroxide and glucose via a one-pot colo…
Hetero-structured interfaces of oxides, which can exhibit reactivity characteristics remarkably different from bulk oxides, are interesting systems to explore in search of highly active fuel cell catalysts for oxygen electrocatalysis. (001)-oriented La 0.6 Sr 0.4 CoO 3- δ (LSC60-40 113 ) thin films having thicknesses…
By means of first-principles calculations, we theoretically studied the structural stabilities and electronic properties of a pure-carbon 2D covalent metal named planar C(4) in P4/mmm (D(1)(4h)) symmetry. Planar C(4) is confirmed to be dynamically stable in the ground state based on phonon-mode analysis, and it is mor…
Phagocytosis or endocytosis by macrophages is critical to the uptake of fine particles, including nanoparticles, in order to initiate toxic effects in cells. Here, our data enhance the understanding of the process of internalization of silver nanoparticles by macrophages. When macrophages were pre-treated with inhibit…
A simple sample preparation method to obtain rich and reproducible surface-enhanced Raman scattering (SERS) spectra from proteins regardless of their surface properties and dimensions for label-free detection and identification is reported. The method uses colloidal silver nanoparticles (AgNPs) as substrates and is ba…
Fe–Ti–V spinel showed excellent SCR activity, N2 selectivity and H2O/SO2 durability at 250–400 °C, and an external magnetic field can effectively prevent the emission of a vanadium based catalyst to the environment due to its magnetization.
In this article, satisfying the second law of thermodynamics, we present a 3D constitutive model for shape memory polymers. The model is based on an additive decomposition of the strain into four parts. Also, evolution laws for internal variables during both cooling and heating processes are proposed. Since temperatur…
In this study, Mg-Al-carbonate layered double hydroxides (denoted as Mg-Al-CO(3) LDHs) were found to catalyze the chemiluminescence (CL) emission from peroxynitrous acid (ONOOH). The enhanced CL signals resulted from the concentration of peroxynitrite (ONOO(-)) onto the LDHs surface by electrostatic attraction, meanin…
Near-infrared (NIR) absorption in the range of 0.75–2.5 μm is in great demand for a variety of applications but currently the majority of commercial NIR devices are based on inorganic materials due to the limited number of organic materials that are active in this range. Here we present the preparation and optical stu…
A boronic acid-appended fluorescent receptor was incorporated into self-assembled nanofibers containing a hydrophobic FRET-paired dye to develop a gel-based fluorocolorimetric sensor for polyols. We demonstrated that the gel-based sensor is capable of detecting polyols such as catechol and dopamine not only under semi…
Electrochemical characteristics, composition and surface morphology of vinyltriethoxysilane (VTES) coatings on aluminum were investigated. The silane coatings were deposited chemically, by immersion in 2 and 5% VTES, and then cured at 100°C during 10 or 30 min. Surface morphology of VTES films was analyzed by scanning…
A family of mesoporous silica microspheres with fibrous morphology and different particle sizes ranging from about 400 to 900 nm has been successfully synthesized through a facile self-assembly process. The structural, morphological, and textural properties of the samples were well characterized by scanning electron m…
The use of single-source molecular precursors for lead chalcogenide thin films by CVD or as nanoparticles by solution methods is reviewed. The potential applications of these materials in solar energy are discussed along with the relative advantages of the various methods.
In order to obtain novel “flying-seed-like” liquid crystals, we have prepared a series of bulky group-substituted phthalocyanine derivatives without any long alkyl chains: tetra[4-(triphenylmethyl)-phenoxy]phthalocyaninato copper(II) (1a), tetra[4-(1,1-diphenylethyl)phenoxy]phthalocyaninato copper(II) (1b), tetra[4-(1…
The energetics of the order-disorder phase transformation in the binary oxide system, Eu2O3–ZrO2, is studied by powder X-ray diffraction and high temperature drop solution calorimetry. The nanocrystalline defect fluorite phase of Eu2Zr2O7 is synthesized on crystallization of an amorphous precursor from aqueous precipi…