Materials Literature
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This paper deals with the fabrication of carbon nanotube field effect transistors (CNTFETs) for gas sensing applications. Such devices exploit the extremely sensitive change of the Schottky barrier heights between carbon nanotubes (CNTs) and drain/source metal electrodes: the gas adsorption creates an interfacial dipo…
With the objective of reduction carbon dioxide emissions, gasoline fuels are increasingly being blended with ethanol of biogenous origin. These blends cause changes in the corrosivity of the fuels. As a result, different forms of corrosion, e.g. general, wet and dry corrosion, of metallic materials must be considered…
In tissue engineering, scaffolds with multiscale functionality, especially with the ability to release locally multiple or specific bioactive molecules to targeted cell types, are highly desired in regulating appropriate cell phenotypes. In this study, poly (epsilon-caprolactone) (PCL) solutions (8% w/v) containing di…
Several compositions in the system TiO2-MgO were prepared via sol-gel method. The structural evolution of the samples was followed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal analysis (DTA/TG). In order to study the crystalline phase stability over time, the amorphous fresh g…
Data retention loss from the amorphous (RESET) state over time in Phase-Change Memory cells is associated with spontaneous crystallization. In this paper, the change in the threshold voltage (VT) of memory cells in the RESET state before and after heating is used as a probe into the nature of the retention loss mechan…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Zhuhua Zhang, Wanlin Guo, Yitao Dai; Freestanding (3,0) boron nitride nanotube: Expected to be st…
Abstract An Al 94 Mn 2 Be 2 Cu 2 cast alloy was developed displaying increased quasicrystalline formation ability at moderate cooling rates. The as-cast microstructure consisted of a mainly icosahedral phase in the Al-matrix. The microstructure remained stable during uniform heating to 580 °C and isothermal annealing…
This paper presents a rigorous investigation of high-frequency effects in carbon nanotube interconnects and their implications for the design and performance analysis of high-quality on-chip inductors. An accurate method is developed to calculate the frequency-dependent resistance and inductance of both single-walled…
The wettability characteristics of different cotton, polyester and multi-layered cotton/polyester fabrics have been studied to manage human perspiration well. The vertical capillary action behavior of these fabrics has been compared by measuring the capillary height as a function of time. Wicking coefficients in multi…
Low-frequency noise in PCM devices is experimentally investigated providing a new physical model for the amorphous GST (Ge2Sb2Te5) material. Noise intensity is characterized and modelled as a function of bias, temperature and size. Findings from 1/ƒ noise analysis are used to understand the drift mechanism of the amor…
The proper annealing of Ni(51)Mn(28)Ga(21) ribbon alloy gives rise to an increase of the saturation magnetization and of the magnetic order T(C) (up to 20 K) and martensitic transition T(M) (up to 10 K) temperatures. The combined x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) studies…
We have studied crystallization-induced stress in phase change films (Ge2Sb2Te5) as a function of thickness and with and without a capping layer, by measuring the deflection of microcantilevers. The stress is found to increase with decreasing film thickness. A thin dielectric capping layer leads to a further increase…
Thermal simulation is, nowadays, a basic tool to predict temperature distributions and heat fluxes of complex packages and modules. These variables are of main importance in high-power assemblies to analyze and predict their reliability limits. Nevertheless, the simulation results can be inaccurate due to the uncertai…
With dimensional analysis and similarity theory, the model similarity law of aircraft structures under bird impact load is investigated. Numerical calculations by means of nonlinear dynamic software ANSYS/LS-DYNA are conducted on the finite element models constructed with different scaling factors. The influence of st…
An 80:20 polyester/viscose blended woven fabric was subjected to different softening and sanforising treatments. The effect of different softeners and sanforising treatments on the pilling propensity of the fabric was investigated. It was found that, while some types of softeners had no effect on pilling, the others m…
Soluble eggshell membrane protein (SEP) is used to engineer poly(D,L-lactic acid) (PDL-LA) membrane surface by a physical entrapment method to enhance cytocompatibility. Attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and contact angle measurements are used to cha…
For possible control of the size of nanoparticles (NPs), the fluence-dependent formation of Zn and ZnO NPs by ion implantation with and without thermal oxidation was investigated by optical absorption spectroscopy, Rutherford backscattering spectrometry, and small-angle x-ray scattering (SAXS). The mean diameter and n…
CuAlO 2 thin films were grown on single crystalline sapphire substrates with c-axis orientation by rf sputtering method. The x-ray diffraction data indicate the formation of delafossite structure and tend to be oriented along (001). Temperature dependent Raman spectra of CuAlO2 thin films were measured from 80 to 1273…
The crystal structures of a nepheline, K0.54Na3.24Ca0.03{square}0.19Al3.84Si4.16O16, and that of the same sample annealed at high temperature to induce K-vacancy disorder, have been determined at several temperatures down to 15 K by single-crystal X-ray diffraction. The largest structural change in both crystals with…
Large scale, high density boron carbide nanowires have been synthesized by using an improved carbothermal reduction method with B/B 2 O 3 /C powder precursors under an argon flow at 1100°C. The boron carbide nanowires are 5–10 μm in length and 80–100 nm in diameter. Transmission electron microscopy (TEM) and selected…