Materials Literature
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We synthesize nanoporous copper (NP Cu) through electrochemical dealloying of amorphous Cu0.41Si0.59 under compressive residual stress. Transmission Electron Microscopy reveals that struts are nanocrystalline with grain size equal to the strut thickness. Moreover, a significant population of twins with spacing ∼7 nm i…
We review experimental results, from transport to magnetization measurements, on different graphite samples, from bulk oriented graphite, thin graphite films to transmission electron microscope lamellae, that indicate the existence of granular superconductivity at temperatures above 100~K. The accumulated evidence spe…
The aim of this present study was to investigate the degradation of Rhodamine B (RhB) in aqueous solution under the influence of ultrasound irradiation. An ultrasonic reactor was used to investigate the effect of different operational parameters such as dye initial concentration, ultrasound power, pH and electrical co…
An innovative mechanism leading to the formation of 5|8|5 defects in graphenic systems is presented. These twofold-symmetrical defects, made by an octagon and two opposing pentagonal rings, emerge from sequences of Stone-Wales rotations, the so-called Stone-Wales waves recently introduced to induce isomeric modificati…
Acid-soluble and pepsin-solubilized collagen were isolated from chicken keel bone and analyzed by electrophoresis and circular dichroism. The denaturation temperature of chicken keel bone was determined by circular dichroism and compared to denaturation temperature of black drum or alligator bone. Our results show tha…
BiFeO 3 nanofibers doped with divalent barium have been fabricated using electrospinning technique. Phase transition from space group R3c to C222 can be observed by the Ba doping. Our results indicate that these BiFeO 3 nanofibers show obvious room temperature ferromagnetic behaviors, which can be enhanced remarkably…
Co vacancy (VCo) induced robust room temperature ferromagnetism (Ms ∼ 60 emu/cm3 and coercivity ∼ 603 Oe) is experimentally realized in rock-salt CoO epitaxial thin film (∼110 nm) grown by pulsed laser deposition. Co charge state is found to be higher ∼+3.2 (from Co L3/L2 white line ratio) and this is due to the VCo i…
Epigallocatechin gallate was added to gelatin, and the changes in the gelatin were characterized to determine the effects of epigallocatechin gallate modification. The microstructural changes in the samples were analyzed using Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetr…
We report in this letter the synthesis and thermoelectric properties of Zn1−xNixO/polyparaphenylene (Zn1−xNixO/PPP) organic-inorganic hybrid materials. Compared to the inorganic ZnO-based materials, hybrid materials exhibit dual effects of increased power factor consistent with the molecular junction effect and a redu…
Stable ultrathin transparent conductive carbon nanotube (CNT) micropatterns were fabricated from photosensitive polymer diazoresin (DR) and carboxylic acid-modified CNT (COOH-CNT) using a layer-by-layer (LBL) self-assembly technique. The CNT micropatterns were realized on LBL ultrathin film after UV exposure through a…
Unsaturated polyester polyol of 2,4,6-tris (4-hydroxyphenyl)-1-3-5-triazine (ETPUP) was synthesized and styrene was added as a reactive diluent (ETPUPSt). The structure of ETPUP was supported by FTIR and 1H NMR spectroscopic techniques. ETPUP is thermally stable up to about 230 °C and followed multistep degradation re…
IN ITS PURE FORM, DIAMOND IS COLORLESS. However, in nature (or even when made in laboratories), diamonds are never composed of 100 percent carbon atoms. Even colorless diamonds will contain some de...
Abstract Layered vanadyl phosphate hydrates with the V/P ratio of 1:1 represent an important class of low‐dimensional phosphate structures as they are of great interest in intercalation chemistry in association with redox catalytic reactions and innovation of light and energy‐saving materials. The inorganic layer of V…
Non-equilibrium molecular dynamics simulations reveal that the thermal conductance of Si nanowires with periodic corrugations is lower than that of smooth wires with cross-sections equivalent to the constricted portions. This reduction in conductance is up to 30% and tends to plateau with increasing corrugation height…
In the search for new materials to separate 2,4-dinitrophenol (DNP) from 2,4-dinitroanisole (DNAN), we have focused on the polymer design and synthesis of novel porous poly(amide-sulfonamide) (PASA) containing both repeated amide and sulfonamide functional groups from the reaction of m-chlorosulfonylbenzoyl chloride w…
We develop a comparative thermal conductivity measurement technique based on miniature differential thermocouples and measure the temperature dependence of the thermal conductivity of chemical vapor deposition grown graphene supported on glass or SiO2 substrate in the temperature range of 180–420 K. For all 28 investi…
The high solar-to-electric-power conversion efficiency reported for 5-(4-carboxylphenyl)-10,15,20-tetrakis (2,4,6-trimethylphenyl) porphyrinatozinc(II) (TPP-Zn(II)) prompted us to study at a molecular level the interaction of this dye on the rutile surface. The –COOH group was included in the complex to anchor the dye…
Bismuth oxide thin films were deposited by atomic layer deposition using Bi(OCMe2iPr)3 and H2O at deposition temperatures between 90 and 270 °C on Si3N4, TaN, and TiN substrates. Films were analyzed using spectroscopic ellipsometry, x-ray diffraction, x-ray reflectivity, high-resolution transmission electron microscop…
Oxidation of CH4 with N2O into value added products like methanol, formaldehyde etc., was attempted in a nonthermal plasma reactor operated under ambient conditions. Typical results highlight the potential of plasma during the direct decomposition of N2O into N2 and nascent oxygen that converts CH4 into methanol, form…
La1-xMgxO1-2xF2xBiS2 (x = 0.1-0.35) were synthesized, and their superconductive properties were investigated. The superconducting transition temperature (Tc) increased below the codoping level (x ≤ 0.25). La1-xMgxOBiS2 (x = 0-0.2) and La1-xMgxO0.6F0.4BiS2 (x = 0.1-0.3) were further prepared to explore the effect of Mg…