Materials Literature
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Summary form only given. A numerical method to obtain the electron energy distribution function (EEDF) using Savitzky-Golay technique is proposed. The Savitzky-Golay filter is one of usually adopted methods to smooth the distorted data, and also gives derivatives of data; the second derivative of I-V characteristic cu…
An interferometric pump-probe method with the femtosecond resolution in time is used to study the third-order non-linear optical response and photosensitivity of a variety of chalcogenide glasses of the system As-S-Se.
Capacitively coupled O2plasma treatment effects of Ga-doped ZnO (GZO) was studied in terms of structural, optical, and electrical properties. GZO films were spin-coated onto glass and post-treated in O2plasma at 0~100 W radio frequency (RF) power and 0~60 s process times in a capacitively coupled plasma system. Atomic…
The spatio-temporal electron impact excitation dynamics in a capacitively coupled RF discharge driven by tailored voltage waveforms in Ar and CF4 are investigated experimentally and by PIC simulations. In the experiment, the discharge is driven by up to three consecutive harmonics of 13.56 MHz with individually adjust…
Summary form only given. For the strongest bonding between two different materials, a novel adhesion process called “plasma press” has been studied using an atmospheric pressure plasma and the effect of plasma press between a flexible substrate (adhesive polymer substrate; Prepreg) and an inorganic material (BaTiO3) h…
Simulation of GaAs nanorings formation by droplet epitaxy was carried out using a kinetic lattice Monte Carlo model. Dependence of nanoring morphology on growth temperature, arsenic flux intensity and gallium drop surface density was demonstrated. The formation conditions for single, double and triple concentric rings…
The optical damage of an LBO crystal by laser pulses of microsecond duration at 1.0796 μm and 0.5398 μm is investigated.
Summary form only given. A Computationally Assisted Spectroscopic Technique to measure secondary electron emission coefficients (γ-CAST) in capacitively coupled radio-frequency plasmas is proposed. This non-intrusive, sensitive diagnostic is based on a combination of Phase Resolved Optical Emission Spectroscopy and pa…
The recent development of high field (25 T at the coil), high temperature REBCO superconductors has been asserted, particularly by scientists and engineers at the MIT-PSFC, to be a potential game changer for the economic development of fusion power based on the tokamak concept. The goal of the present work is to test…
The optical gain characteristics of AlN-delta-GaN quantum well are investigated for mid-ultraviolet (UV) lasers. The ultra-thin delta-GaN layer is inserted into AlN quantum well (QW) active region with AlN barrier layers. Large TE-polarized optical gain is achieved for AlN-delta-GaN QW structure at 253 nm. The peak em…
Impregnated pressboard is currently one of the insulating materials under investigation for DC applications at the University in Schweinfurt. In HVDC (high voltage direct current) equipment, AC and DC stresses have to be regarded and therefore, permittivity as well as electrical conductivity play a role. Especially th…
Summary form only given. In this paper we present the review of various research works that our group has done to develop a simple and environmentally-friendly approach for (i) green plasma chemistry based synthesis of free standing 3-D carbon nanostructures, particularly graphene nanomesh and vertical graphene, using…
Some features of spectral and non-linear optical properties of ZnS quantum dots stabilized by high-molecular polyvinylpyrrolidone have been studied. It is shown that the absorption spectra of ZnS composite materials (sols, coatings) in UV spectral region are determined by quantum confinement effect, exhibiting the dep…
The homoepitaxial growth of diamond on single crystal substrates is done using microwave plasma-assisted chemical vapor deposition with a hydrogen-methane plasma. The doping of the deposited diamond with boron makes it a p-type semiconductor and with phosphorus makes it an n-type semiconductor. The doping of diamond i…
Various mechanical and chemical pretreatment methods including alkali treatment, pre-beating, enzyme treatment and oxidation treatment have been used to reduce the production energy of the microfibrillated cellulose (MFC). Among them, alkali swelling can be helpful to reduce the energy consumption because the internal…
We have experimentally studied saturation behavior of Single-Walled Carbon Nanotube-based saturable absorbers at different temperatures and SWCNT concentrations in the carboxymetylcellulose polymer matrix and related it to the mode-locked erbium-doped fiber laser performance.
In this work a method for the laser formation of C-Au-Ag clusters and complexes on the surface of an optically transparent media is discussed.
In this study, experiments and finite element method analysis were used to determine the autofrettage pressure that is optimal and then maximizes the cycling life of Type3 composite cylinders used in self-contained breathing apparatus. For both approaches, the cylinders were pressurized at 100, 110, ..., 290 % of the…
This paper presents distractive features of hysteresis voltage control for voltage source inverters. The features of the creation of the hysteresis voltage control systems for electric power systems are considered. The possibility of applying of hysteresis voltage control for multilevel voltage source inverters is eva…
본 연구에서는 UV 광을 이용하여 CO, C₂H 5 OH 및 H₂S에 해당하는 오염물질을 제어하기 위한 광촉매 연구를 수행하였다. 제조된 촉매들이 동일한 체적 및 표면적의 경우에는 촉매 구조 내부까지 UV 광이 조사될 수 있는 구조에서 우수한 반응활성을 보였다. 하지만 이러한 광촉매 TiO₂의 CO에 대한 반응활성은 매우 저조하였으며, 이는 귀금속 계열의 Pt를 첨가하여 환원공정을 수행함으로써 해결할 수 있다. 특히 이러한 Pt/TiO₂ 광촉매는 환원공정을 통하여 표면 Pt 0 의 종의 생성 및 증가시킬 수 있으며, 이를 통해 CO의 반응활성이 우수해 짐을 확인하였…