Materials Literature
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It is well known that cavitation collapse can generate intense concentrations of mechanical energy, sufficient to erode even the hardest metals and to generate light emissions visible to the naked eye [sonoluminescence (SL)]. Considerable attention has been devoted to the phenomenon of "single bubble sonoluminescence"…
Gold and nickel nanoclusters immobilized on aluminum oxide exhibited high activity in the reaction of acetylene hydrogenation to ethylene with molecular hydrogen at temperatures from 20 to 64°C. The reaction selectivity on Au-Ni nanocomposites with metal concentrations from 0.02 to 0.36 wt % was no lower than 99.99%,…
Abstract The emission mechanism in ZnS-capped 3-nm CuInS 2 nanocrystals was studied by using time-resolved photoluminescence (TRPL). A typical TRPL spectrum demonstrates two broad emission bands. The spectral shifts as functions of the excitation power density and delay times from the excitation moment prove that both…
Abstract Wetting properties and surface roughness of SU‐8 can be modified by wet chemical and plasma processes. These processes result in an enhanced wettability that can be attributed to an increase of CO and COO groups at the surface. Wet chemical etching with ceric ammonium nitrate (CAN) rendered the SU‐8 surface…
Electronic and magnetic properties of Co-doped TiO2 polycrystalline pellets (Ti0.95Co0.05O2) have been investigated using x-ray diffraction, x-ray photoemission, magnetization, and resistance measurements. The as-synthesized and hydrogenated specimens crystallize in the anatase type tetragonal structure containing ver…
Magnetic exchange data for bi- and polynuclear complexes of transition metals with hydrazones, Schiff bases, oximes, and related systems were generalized and systematized. A correlation between the electronic and geometrical structures of the complexes and characteristic exchange effects was discussed. A systematic an…
Application of Ni?Mn?Ga magnetic shape memory alloys in magnetic-field-induced actuation relies on their performance in long-term high-cycle fatigue. In this paper the performance and changes in the microstructure of a Ni?Mn?Ga 10M martensite single crystal material are reported in a long-term mechanically induced sha…
We review a combination of theoretical and experimental techniques that have been applied to the study of grain boundaries in SrTiO 3 , with particular attention to Σ3 and ( 100 )-oriented grain boundaries. Electron microscopy, which includes high-resolution transmission and high-angle annular dark-field methods, is d…
One of the most significant challenges implementing colloidal magnetic nanoparticles in medicine is the efficient heating of microliter quantities by applying a low frequency alternating magnetic field. The ultimate goal is to accomplish nonsurgically the treatment of millimeter size tumors. Here, we demonstrate the s…
AIM: Low solubility in water has become an intrinsic property of many anticancer drugs, which poses a hurdle in the translation from the bench to the clinic. In this study, we developed a facile method to prepare 10-hydroxycamptothecin (HCPT) nanocrystallites and testified their feasibility for liver-targeting therapy…
( 1 − x ) Bi 0.5 Na 0.5 TiO 3 − x Bi ( Zn 0.5 Ti 0.5 ) O 3 [(1−x)BNT−xBZT, x=0, 0.025, 0.0375, 0.050, and 0.075] lead-free piezoceramics were prepared and their structures and electrical properties were investigated. It is found that BZT can increase the Curie temperature of BNT. A morphotropic phase boundary (MPB) se…
BACKGROUND: Adenoviral-directed enzyme prodrug therapy is a promising approach for head and neck cancer gene therapy. The challenges faced by this approach, however, comprise transient gene expression and dissemination of viruses to distant organs. METHODS: We used recombinant silk-elastinlike protein polymer (SELP) m…
Problem statement: Microcapsule is one of important fine chemical products in the current chemical industries. Better understanding of microencapsulation process is useful to properly design of microcapsule with specific characteristics. The aim of this research is to study the mechanism of Urea-Formaldehyde (UF) micr…
The detection of partial discharge (PD) and the analysis of SF6gas components in gas insulated switchgear (GIS) have great significance for the fault diagnosis and running state assessment of power equipments. In this paper, a method of detecting SF6decomposition components caused by PD is proposed. Accordingly, multi…
Abstract The effects of acid activation on the chemical composition, surface area and pore structure of palygorskite from Xuyi (Jiangsu, P.R. China) were investigated systematically using X-ray fluorescence (XRF) and BET techniques. The palygorskite samples were activated with HCl, H 2 SO 4 and H 3 PO 4 of various con…
This review demonstrates the potential of sonochemistry to become a valuable tool for nanotechnology through composite fabrication if the underlying complex processes are understood and controlled. We show that control of cavitation requires control of interfaces at the microsecond timescale, and a diversity of phenom…
Optimal conditions were found for the preparation of copper nanoparticles in aqueous solution via reduction of copper(II) ions with hydrazine hydrate. The effects of ligand environment of copper(II) in the initial solution (hydrate, ammonia, citrate, and glycine complexes), concentration, pH, surfactants, temperature,…
The geometry of the semiconductor pellets (i.e., the number of them and their height) within thermoelectric modules (TEMs) operating in generation mode is optimized in order to maximize either their performance (i.e., output power) or their conversion efficiency for a specified performance. This is accomplished for a…
Electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) are used to identify and characterize electrons trapped by oxygen vacancies and holes trapped by lithium vacancies in lithium tetraborate (Li2B4O7) crystals. Our study includes a crystal with the natural abundances of B10 and B11 and a…
Innovations in computer technology have made possible continuous on-line monitoring of partial discharge (PD) activities. The power industry aims to assess the condition of power system equipment through on-line monitoring of PD activities. This involves long-term continuous data recording and it is very difficult to…