Materials Literature
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Gold clusters protected by terminal alkynes (1-octyne (OC-H), phenylacetylene (PA-H) and 9-ethynyl-phenanthrene (EPT-H)) were prepared by the ligand exchange of small (diameter <2 nm) Au clusters stabilized by polyvinylpyrrolidone. The bonding motif of these alkynes on Au clusters was investigated using various spectr…
This Review focuses on the recent progress in the area of CO2 -responsive polymers and provides detailed descriptions of these existing examples. CO2 -responsive polymers can be categorized into three types based on their CO2 -responsive groups: amidine, amine, and carboxyl groups. Compared with traditional temperatur…
A new chemical dual-functional reducing agent, thiophene, was used to produce high-quality reduced graphene oxide (rGO) as a result of a chemical reduction of graphene oxide (GO) and the healing of rGO. Thiophene reduced GO by donation of electrons with acceptance of oxygen while it was converted into an intermediate…
No sweat, no gain: Flexible biofuel cells functionalized with lactate oxidase (LOx) and platinum as anode and cathode materials harvested biochemical energy from human perspiration (see picture). Substantial power was generated from human sweat in real-life scenarios.
An efficient and mature inkjet printing technology is introduced for mass production of coffee-ring-free patterns of high-quality graphene at high resolution (unmarked scale bars are 100 μm). Typically, several passes of printing and a simple baking allow fabricating a variety of good-performance electronic devices, i…
Supercapacitors have been widely studied around the world in recent years, due to their excellent power density and long cycle life. As the most frequently used electrode materials for supercapacitors, carbonaceous materials attract more and more attention. However, their relatively low energy density still holds back…
Nanoparticles (NPs) of copper oxide (CuO), zinc oxide (ZnO) and especially nanosilver are intentionally used to fight the undesirable growth of bacteria, fungi and algae. Release of these NPs from consumer and household products into waste streams and further into the environment may, however, pose threat to the 'non-…
Проанализирована термодинамика процессов взаимодействия реакторных материалов (цирконий, железо, графит) с водяным паром. Показано (с учётом кинетических факторов), что участие кислорода в этих процессах приводит к экзотермическому характеру и резкому возрастанию интенсивности реакций, продуктом которых являются \nвзр…
This report outlines the selection of coolant, fuel and structural material for the Hyperion Power reactor concept (now the Gen 4 Energy concept.) The logic for coolant, fuel and structural material is presented individually.
We propose a simple method to improve the light extraction in GaN based light emitting diode. Conventional light emitting diode has an extraction limitation due to the total internal reflection which occurs at the interface between GaN and air. By using periodic grating etched at the GaN layer, we can couple more emit…
Diagnostic Electron Microscopy. A Practical Guide to Interpretation and Technique. John W. Stirling , Alan Curry , and Brian Eyden (Eds.). Royal Microscopical Society and John Wiley and Sons, Chichester, West Sussex, UK, 2013. ISBN: 978-1-119-97399-7. - Volume 19 Issue 4
In this study, effects of silicon addition on the spheroidizing annealing of hyper-eutectoid steel was investigated. Heat treatment at various temperatures in the ${\gamma}+{\theta}$ region was also conducted in order to systematically control the kinetics of undissolved cementite. It was found that small amount of Si…
Shingled magnetic recording (SMR) is suitable for higher density recording due to its writing ability. We calculate the SMR's offset error rate with a probabilistic approach by using a linear geometric model. The results show the SMR's offset error rate as being a little better than conventional recording. We also qua…
The gene of Mus musculus was cloned into plasmid vector (pYEUra3) of E.coli from the cDNA library which was then verified using colony PCR. The plasmid DNA was then purified and digested with EcoRI to check the presence of an insert. PICOGREEN assay, HindIII digestion and absorbance were used to quantify the DNA. The…
High-voltage (HV) tests are usually required for evaluating electrical withstand of equipment, such as power transformers. These tests are based on standards that suggest values for the parameters of the voltage surge wave shape to be applied. However, for the personnel of HV laboratory, the adjustment of the wave sha…
In this work, we present next-generation solar cells based on GaAs 3-D nanostructures compared to conventional 2-D approaches as a path to low-cost, high-efficiency photovoltaics. Arrays of GaAs nanopillars are capable of waveguiding light into the absorbing semiconductor, reaching broadband absorption values close to…
The microstructural changes of Fe-20Mn-12Cr-1Cu alloy have been studied during high temperature gas nitriding (HTGN) at the range of $1000^{\circ}C{\sim}1150^{\circ}C$ in an atmosphere of nitrogen gas. The mixed microstructure of austenite and ${\varepsilon}$ -martensite of as-received alloy was changed to austenite s…
Based on the Stieltjes integral, this paper investigates the characteristics of the torque area of surface permanent magnet motors with sinusoidal magnetization used in hard disk drives. Then, a simple torque calculation algorithm is proposed and verified through comparison with the finite element analysis. Meanwhile,…
We investigate the difference between analytic predictions, numerical simulations, and experiments measuring the transmission of energy through subwavelength, periodically arranged holes in a metal film. At normal incidence, theory predicts a sharp transmission minimum when the wavelength is equal to the periodicity,…
단일 벽 탄소 나노튜브(SWNT)의 열전도도를 구하기 위해서 메모리함수에 Kubo 등식을 사용하였다. 계산 과정에서 나타나는 발산의 문제를 해결하기 위해 전파인자는 연속 분수과정으로 전개하였다. 이러한 계산에서 메모리함수는 지금까지 제시된 다른 이론들 보다 많은 상호작용의 효과를 고려할 수 있다. SWNT에서 20 K 이하의 저온 영역은 온도의 증가에 따라 열전도도가 증가하며, (9,0) 보다 (10,0)이 다소 큰 값을 가지는데 이는 포논의 평균자유행로 $l_{ph}$ 가 직경의 크기와 관계 있음을 알 수 있다. 그리고 20 K 이상의 고온 영역에서는 비열이 거의…