Materials Literature
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Confocal photoluminescence scans of monocrystalline CdTe/MgCdTe double heterostructures epitaxially grown on lattice-matched InSb substrates reveal very low twin defect density, below 1 × 105cm-2. Room-temperature Shockley-Read-Hall (SRH) lifetimes of these samples are determined in the range of 35 ns to 86 ns using t…
Abstract An organic semiconductor, expressed as a quadrupolar linear conjugated system (DPP Linear‐c), consisting of a 1,4‐diketopyrrolo[3,4‐c]pyrrole (DPP) central unit and two quaterfluorenylphenyl arms at the 3‐ and 6‐positions of the DPP fragment, is studied in organic field‐effect transistors (OFETs). The strong…
Incomplete binder removal may introduce severe defects during ceramic processing. This work presents a new method to eliminate polyethylene glycol used as a binder in pre-sintering steps of alumina parts. The effectiveness of the proposed method was evaluated by density and pore size measurements, as well as thermogra…
In this paper, thermal cycling of silicon power semiconductor dies mounted on polycrystalline diamond and aluminum nitride insulated substrates is presented. Thermal strain, stress and safety factor was analysed using ANSYS®static structural analyses tool to understand the dependence of thermal strain and stress. Poly…
과산화수소 증기는 기존 염소계열의 멸균제에 비해 부식성이 낮아 제약 및 의료 분야의 실내멸균제로 사용되며, 암모니아 가스 추가 시 화학작용제의 제독성능이 있다고 알려져 있다. 본 연구에서는 과산화수소 증기를 이용하여 HD, GD, VX의 유사작용제인 CEPS, DFP, dimethoate 등에 대한 제독효율을 확인하였다. 이를 위해 자체 구성한 과산화수소 기화장치에서 발생시킨 증기를 제독챔버에 주입하여 반응시간을 유지하였다. 제독 후 잔류물을 GC/MS로 분석한 후 제독효율을 계산하였고, 각각의 유사작용제에 대한 반응 생성물을 통해서 화학작용제의 반응 메카니즘과 유…
A single step method for the synthesis of gold nanoparticles decorated graphene oxide nanocomposite using aniline as reducing agent has been developed. The composite was characterized using FE-SEM, UV-Vis and FT-IR and XRD analysis. The electron transfer behavior of the modified electrodes was investigated in a redox…
The impact of the cutting parameters; speed, feed, and depth of cut on the wear and the life of the cutting edge has long been a matter of debate among researchers. The cutting speed has long been agreed to have a prime influence in such a way that increasing speed leads to higher wear rate. Depth of cut has been conc…
Abstract In the course of homogenizing annealing of aluminium alloys being cast continually or semi-continually it appears that chemical inhomogenity takes off within separate dendritic cells (crystal segregation). It is about a diffusion process that takes place at the temperature which approaches the liquid temperat…
The Article is devoted to the realization of the contact method of amplitude measuring and distribution of it near ultrasound vibration sources, specifically: designing and development of piezoelectric receiving transducer with a point (needle) contact. Metrological characteristics of created device were measured. It…
Alternative coatings should be as effective as conventional paints but with lower toxicity. In the present study, a commercially available epoxy resin modified with non functionalized nanozinc oxide (nZnO) was examined to get information on its antifouling and anti-corrosive properties. Epoxy nanohybrid coating was sy…
The design space of conventional semiconductor devices - from the materials point of view - is currently set by heteroepitaxy, whose capability is strongly limited by lattice parameters and structures of materials of interest. Heterostructures of substantially different semiconductors may offer significant advantages…
This paper describes the relationship between sintering time conditons, tetragonality from phase formation, dielectric and ferroelectric characteristics of tetragonal PLZT (lanthanum modified lead zirconate titanate) ceramics with the pressureless sintering conditions. Ferroelectric compounds of Pb0.92La0.08(Zr0.4,Ti0…
The transition to semiconductor manufacturing on 450mm wafers continues to be one of the biggest challenges in the semiconductors industry. Even though lithography is critical for 450mm development, process tools such as ion implantation and associated metrology are also challenged by scaling-up to keep acceptable CoO…
Quantitative analysis of PET data requires a metabolite-corrected arterial input function (AIF) for estimation of distribution volume and related outcome measures. Collecting arterial blood samples adds risk, cost, and patient discomfort to PET studies. Minimally invasive AIF estimation is possible with simultaneous e…
AlGaN/GaN high elerton moblity transistors (HEMTs) with about 90 nm gate and 18nm-thick AlGaN barrier were fabricated on SiC substrate. The DC and RF characteristics were mearsured. The device has achieved a maximum drain current density of 1.2A/mm at a gate bias of +1.0V and a peak extrinsic transconductance of about…
Kraft paper is widely used in oil-paper insulation of power transformer. This type of cellulose insulation paper degrades under the combined influence of a number of interrelated factors, including moisture and electric field, during the long-term running process of power transformer. And researchers have conducted a…
It is well known that devices based on chemical vapor deposited (CVD) graphene exhibit substantial variability of their electrical properties [1]. However, the sources of such variability and how they might be controlled remain poorly understood. Here, we methodically investigate variability of CVD graphene field-effe…
A wide variety of physical and chemical detecting methods have been proposed for discriminating between an electric arc beads that caused a fire, versus one that was caused by the fire itself. The simplest proposed method claims that examination of the molten marks in a bead under a microscope will suffice to make the…
Poly-β-hydroxybutyrate-co-β-hydroxyvalerate (PHBV) is a bacterial-synthesized biopolymer. Moreover, PHBV is a biodegradable, it is an interesting biopolymer for disposable products. PHBV is difficult to process due to its low toughness, an elastic polymer such as natural rubber is introduced to develop toughness. In t…
A model was developed to describe the luminescent down-shifting (LDS) process in photovoltaic application. The model links the Jscenhancement (JLDS%) of the solar cell to the photophysical properties including absorption (λabs) and emission (λem) wavelengths, Stokes shift (Δλ) and spectral cutting point (λSCP), as wel…