Materials Literature
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Transformer oil-based nanofluids with TiO2 semiconductive nanoparticles exhibit substantially higher AC and positive impulse breakdown voltage levels than that of pure transformer oils. Thermally stimulated current method (TSC) and pulse electroacoustic technique (PEA) have been used to measure charge trap and transpo…
We report a general method for the synthesis of noble metal nanorods, including Au, Ag, Pt, and Pd, based on their seeded growth in silica nanotube templates. The controlled growth of the metals occurs exclusively on the seeds inside the silica nanotubes, which act as hard templates to confine the one-dimensional grow…
Flexoelectric effect, which is defined as strain gradient–induced polarization or electric gradient–induced strain in crystalline solids, can be presented as a fourth-rank tensor. The symmetry of the flexoelectric coefficients in matrix form is studied. The results indicate that the direct flexoelectric coefficients s…
We systematically investigate the magnetic and electronic properties of graphene adsorbed with diluted 3$d$ transition and noble-metal atoms using first-principles calculation methods. We find that most transition-metal atoms (i.e., Sc, Ti, V, Mn, Fe) favor the hollow adsorption site, and the interaction between magne…
A significant enhancement of thermoelectric performance in layered oxyselenides BiCuSeO was achieved. The electrical conductivity and Seebeck coefficient of BiCu(1-x)SeO (x = 0-0.1) indicate that the carriers were introduced in the (Cu(2)Se(2))(2-) layer by Cu deficiencies. The maximum of electrical conductivity is 3…
Graphene subject to a spatially uniform, circularly polarized electric field supports a Floquet spectrum with properties akin to those of a topological insulator. The transport properties of this system, however, are complicated by the nonequilibrium occupations of the Floquet states. We address this by considering tr…
Covalent organic frameworks (COFs) are a class of important porous materials that allow atomically precise integration of building blocks to achieve pre-designable pore size and geometry; however, pore surface engineering in COFs remains challenging. Here we introduce pore surface engineering to COF chemistry, which a…
π-Conjugated organic molecules represent an attractive platform for the design and fabrication of a wide range of nano- and microstructures for use in organic optoelectronics. The desirable optical and electrical properties of π-conjugated molecules for these applications depend on their primary molecular structure an…
We report here the UV-VIS study of CdS nanoparticles synthesized via Chemical precipitation in aqueous medium, the UV-VIS of CdS in aqueous medium shows an excitonic peak at 230 nm, while that of CdS quantum dots in solid form shows an absorption maximum at 480 nm. This bleaching of band gap may be attributed to Moss–…
The Microstructure Characterization and the Mechanical Properties of Electrospun Polyacrylonitrile-Based Nanofibers
Although one is hard-pressed to name an industry that has not jumped on the nanotechnology bandwagon, the makers of cosmetics and sunscreens have capitalized on nanotechnology more aggressively than any other. Already by 2006, 5% of all cosmetic products contained nanoparticles (NPs), whereas more than 300 sunscreens…
Together we glow: Fully organic host-guest crystals with two dyes inserted in their parallel nanochannels display broad emission in the visible range thanks to resonant energy transfer. The conjugated host crystal provides light harvesting in the UV region.
ZnO thin films deposited on fused silica glass substrates were sequentially implanted with P ions in terms of different energy/fluence combinations, i.e. 150 keV/1.5 × 10 15 ions cm −2 , 80 keV/5.5 × 10 14 ions cm −2 and 35 keV/2.5 × 10 14 ions cm −2 , or were singly implanted with 150 keV P ions at a fluence of 1.5 ×…
Using molecular dynamics simulations we study, in two dimensions, the temperature-density phase diagram of a simple model with two internal states labeled 1 and -1. The particles interact with a modified Lennard-Jones potential, which depends on relative positions of the particles as well as on their state. Working in…
The world is turning into a vast technological jungle and the amount of pollution has increased proportionally to the number of industries and world population. The majority of the pollution is created by anthropogenic activities that include burning of fossil fuels, exhaust of automobiles and other combustion process…
Abstract BACKGROUND: Bacterial cellulose (BC) synthesized by Acetobacter xylinum has been shown to be a potential matrix for impregnating carbon nanotubes (CNTs) to produce bacterial cellulose/carbon nanotubes (BC/CNTs) nanocomposite. The objective of this study was to investigate the crystal structure of BC/CNTs nano…
intended to cover every aspect of fibre surface modification, but rather focus
Nanofibers have been paid much attention in research community due to the recent developments in nanotechnology. Generally, nanotechnology deals with structures sized 1-100 nm in at least one dimension. Nanotechnology may create many new materials and devices with a vast range of applications such as in medicine, elec…
We present a quantitative analysis of grain morphology of self-organizing hexagonal patterns based on the phase-field crystal model to examine the effect of stochastic noise on grain coarsening. We show that the grain size increases with increasing noise strength, resulting in enhanced hexagonal orientation due to noi…
The first-principles density functional theory is used to study the interaction of atomic hydrogen with ZnO surfaces. We find that atomic-hydrogen environments significantly reduce ZnO surface formation energies with hydrogen adsorption on the surface. The negative surface energy of the O-terminated ZnO(0001) surface…