Materials Literature
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The CO2, air, oxygen and special gases effluence and contamination in compressed gas cylinders during storage and transportation resulting into localised pitting corrosion of the storage and conveying metal is a major challenge in oil and gas sector. In an attempt to address this, the inhibition influence of Ketoconaz…
大気中光電子収量分光法は，試料にエネルギーを変えながら紫外線を照射し，放出される光電子数をオープンカウンターで測定する手法である．オープンカウンターは大気中で動作するので，大気中での物質の電子状態を反映した結果が得られる．近年，著者らは，大気中におけるその場観察の新たな可能性を引き出すことに取り組んできた．本総合論文では，最近の成果である，1）金属表面の仕事関数のその場観察，2）飲料の光電子放出特性，について紹介したい．
A new simultaneous measurement method for the measurement of the three thermoelectric properties with a film-type thermocouple probe was proposed. Seebeck coefficient was measured using the steady-state condi-tion of the differential method. The electrical resistivity was measured us-ing the four-probe method and the…
Here we report the preparation of nitromercurated styrene butadiene rubber (NMSBR)/silver doped zinc oxide nanocomposite by inexpensive and ecofriendly two roll mill mixing. The composites were characterized by UV, FTIR, XRD, SEM, TGA and conductivity measurements. UV and FTIR spectrum indicated the interfacial intera…
The thermoelectric effect, i.e., appearance of thermally stimulated current and voltage during uniform heating in a temperature range from 30 to 250°C, is studied. It is shown that greatest values of the current and voltage appear when maximum band gap difference is observed.
FM-52M, a kind of filler metal matched for Inconel 690, is widely applied in critical components of nuclear power plant. In this work, the effect of the microstructure refinement of FM-52M was studied through pulse TIG welding. First, a serial of bead welds under different welding parameters were conducted to elucidat…
本文利用第一性原理对单个Si原子掺杂石墨烯结构的电子性质进行了计算模拟研究。结果表明，该体系的原子间杂化成键状态倾向于sp2-sp3混合杂化，原子排列出现了褶皱，石墨烯原有的空间反演对称性破缺，使得石墨烯能带结构中的狄拉克锥的零能隙打开。通过投影能带发现，掺杂Si原子在狄拉克锥附近的贡献较小，其主要影响是改变体系的杂化成键状态使体系几何结构发生改变，进而导致体系的电子性质发生变化。 By using first principle calculations, we have investigated electronic properties of single Si atom doped graphene. The result…
The magneto-dielectric properties of ferromagnetic-ferroelectric (FM-FE) composites synthesized by using Mn-Zn ferrite and BaTiO3 (BTO) nanoparticles are reported in this work. The X-ray diffraction analysis of the composites show the existence of FM and FE phases. The field emission scanning electron micrographs (FES…
Organizational-and-technological design is considered to be a significant section of structural design in terms of its content and complexity. The processes of formating and automating the organizational and technological documentation in construction have their own specific features. In recent years leading Western a…
Natural fiber reinforced composites (NFRC) are used in several applications because of their good specific properties, eco-friendly characteristic and low cost. Moreover, due to the viscoelastic behavior of natural fibers, NFRC could present high damping capacity that is an important characteristic required in several…
We report a systematic investigation on photoluminescence (PL) behaviour of Au/ZnO/Au hybrid nanostructure. The ZnO (150 nm), and Au (10 nm)/ZnO (150 nm)/Au(10 nm) were deposited on quartz substrate by pulsed laser deposition (PLD) technique. The thickness of ZnO and Au films has been estimated from Rutherford backsca…
Li-CFx battery using a specific fluorinated nanocarbon as cathode material exhibits a capacity exceeding the expected theoretical value when used as an electrode material in primary lithium battery. Carbon nanodiscs were partially fluorinated by atomic fluorine released by thermal decomposition of TbF4, and the capaci…
A heat-engine using Ti-Ni shape memory alloy (SMA) driven by low-temperature waste heat energy has been investigated for waste heat recovery potential system. We had proposed the use of the tape-shaped SMA element because of the cooling efficiency improvement of the SMA element. However, the manufacturing cost of the…
In the present study, the dc conductivity of Se80-xTe20Pbx (x = 0, 1 and 2) glassy alloys has been measured from room temperature (298K) to 318K and in the voltage range 0-180V. I-V characteristics indicate that an ohmic behavior is observed at low electric field. However, at high electric field, non-ohmic behavior is…
The temperature driven first order AFM to FM phase transition of Rh doped FePt is studied during cooling and heating across the transition temperature by magnetic force microscopy. During warming AFM to FM transition starts with the nucleation of micrometer size nuclei of FM phase, which grows gradually with increase…
Early 19th century Deutsche Bund time historic mining horse skeletons were discovered in a mining road water canal nearby the deepest European iron mine west of Prague, Central Bohemia (CZ). Four different sized horse races and interbreeds of larger cold blood horses, medium-sized warm blood Przewalski breeds, but mai…
Extensive global research efforts have focused on the exploitation of graphene for enhanced energy storage. Novel graphene-based composite material electrodes have been developed, in many cases with reports of outstanding performance. However, the development of these composites involve extremely complex and costly pr…
We have synthesized bismuth telluride compound using mechanical alloying and hot press sintering method. The phase formation, crystal structure was evaluated by X-ray diffraction and Raman spectroscopy. The scanning electron microscopy images indicated sub-micron sized grains. We observed low value of thermal conducti…
This review study aimed at assessment of the bacterium Helicobacter pylori whether it is guilty, not guilty or innocent towards the brain and Alzheimer disease (AD). AD is a chronic age-related degenerative disease characterized by loss of cognitive and memory functions. A genetic theory was suggested while the amyloi…
We report here a microscopic tight binding theoretical model study of ferromagnetism in graphene taking into account of substrate effect and Coulomb interaction in both the sub-lattices of the honeycomb lattice. The Coulomb interaction is treated here within mean-field approximation giving rise to the ferromagnetic ma…