Materials Literature
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We study the simple Hamiltonian, $H=\ensuremath{-}K({S}_{1z}^{2}+{S}_{2z}^{2})+\ensuremath{\lambda}{\stackrel{P\vec}{S}}_{1}\ifmmode\cdot\else\textperiodcentered\fi{}{\stackrel{P\vec}{S}}_{2}$, of two large, coupled spins which are taken equal, each of total spin $s$ with $\ensuremath{\lambda}$ the exchange coupling c…
Nickel ferrite spinel nanopowders were synthesised using a solution spray radio-frequency inductively coupled plasma reactor over a wide range of compositions (NixFe3-xO4, x ≤ 1), with metastable powders produced for x = 0, 0.25, and 0.5. X-ray fluorescence and X-ray diffraction coupled to Rietveld refinement show tha…
The synthesis and properties of new water-soluble tetra- and octacationic derivatives of meso-tetrakis(3-pyridyl)bacteriochlorin are reported. Tetracationic salt was synthesized by quaternization of the pyridine groups of starting bacteriochlorin with 1,4-dibromobutane. Octacationic salts were obtained by treating of…
Based on mathematical modeling and numerical simulations, influences of various biofuels on high temperature fuel cell performance are presented. Governing equations of high temperature fuel cell modeling are given. Adequate simulators of both SOFC and MCFC have been done and described. Performances of these fuel cell…
A six-residue facial cyclopeptide was designed with the following sequence: c-[D-Leu-L-Lys-D-Ala-L-Lys-D-Leu-L-Gln] (CP). Extensive hydrogen bonding between the cyclopeptide backbones mainly regulated CP to self-assemble into single-walled nanotubes. Simultaneously, the hydrophobic interaction among facial hydrophobic…
In this study, albumin egg (AE) induced layered rectorite (REC) to exfoliate by electrostatic forces between the molecular chains of AE and the interlayer of REC, which was confirmed by small angle X-ray diffraction. The composite nanofibrous mats with the exfoliated layered rectorite were successfully fabricated via…
We synthesize colloidal CdSe@CdS octapod nanocrystals decorated with Pt domains, resulting in a metal-semiconductor heterostructure. We devise a protocol to control the growth of Pt on the CdS surface, realizing both a selective tipping and a non-selective coverage. Ultrafast optical spectroscopy, particularly femtose…
When the plastic deformation is applied to neat polymer, the polymer chains are aligned and the thermal conductivity of neat polymer increases linearly along the loading direction. However, the thermal conductivity change of nanocomposites consisting of polymer matrix and nanofillers during plastic deformation is not…
Gold-nanoparticles (AuNPs) are employed for cancer treatment, drug delivery, chemical analyses, and many other uses. As AuNP manufacture increases, it is imperative that we understand the environmental fate of these nanomaterials. We investigated the transport and stability of AuNPs under simulated groundwater conditi…
High-resolution 1 H NMR has been used on the thermoresponsive hyperbranched polyethylenimines (HPEIs) modified with isobutyramide (IBAm) groups (HPEI-IBAm), to study the structure and dynamics of the macromolecules in aqueous solution before and after the phase transition. It shows that the HPEI-IBAm macromolecule hav…
Flower shaped homocentric pencil like ZnO nanorod bundles are synthesized by a hydrothermal method. The PXRD pattern corresponds to the typical wurtzite structures of ZnO, which exhibits excellent activity as a photocatalyst for the degradation of malachite green under solar light irradiation.
Tunable white light emission was obtained from ZnO nanorods with lengths ranging from 125 to 165 nm and quantum dots with an average size of 5 nm, synthesized with dodecylamine (DCA) as surfactant. It was possible to tailor the emission from cool to warm white light by changing the concentration of DCA in the synthesi…
Two new epiphytic species of Ulnaria (Kützing) Compère, U. titicacaensis E. Morales, Ector & P.B. Hamilton and U. macilenta E. Morales, C.E. Wetzel & S.F. Rivera, are described from the Tiquina Strait, Lake Titicaca, Bolivia. The taxa have distinctive morphological features and their separation from morphologically re…
Motivated by recent experimental and theoretical works dealing with the silicene and the graphene materials and inspired from the root systems of Lie algebras, we study the electronic and the magnetic properties of the iron adatom adsorption on the graphene. The calculations have been performed using the density funct…
Destabilization by the alkali metal hydroxides LiOH, NaOH, and KOH in the solid-state dehydrogenation of LiBH4 is reported. 6.5 wt% of hydrogen was liberated within 10 minutes at 250 °C. Destabilization originated from the interaction between H+ in [OH]− and H− in [BH4]−. A larger Pauling's electronegativity of the al…
Diamond, as a consequence of its superlative intrinsic physical properties, is an attractive material for a wide range of applications. Recent developments have greatly enhanced the quality of gas-phase grown diamonds. It has been observed that some defects are grown into diamond preferentially aligned to specific ori…
It is estimated that of all the nanomaterials used in consumer products, silver nanoparticles (AgNPs) currently have the highest degree of commercialization. They are used in electronics, clothing, paints, cosmetic, bactericides, bio-fungicides, biomedical applications, in the medical-pharmaceutical industry and food…
ABSTRACT Cellulose fibers from cellulose/1‐ethyl‐3‐methylimidazolium acetate solution were prepared by wet spinning with increasing extrusion speeds and draw ratios. The effects of spinning speeds on the structures and mechanical properties of these fibers were investigated by using scanning electron microscopy, wide…
Mesoporous zirconium phosphotungstate with large specific surface area, large pore volume, uniform pore size distribution, and tunable W/Zr ratios was successfully prepared.
ABSTRACT The dielectric and biological properties of chitosan (CTS)‐based nanocomposites were analyzed by dielectric spectroscopy, and antibacterial and antifungal assays. Carbon nanotubes (CNT) and CNT decorated with silver nanoparticles (AgnP) were incorporated into a CTS matrix at different concentrations to obtain…