Materials Literature
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Создана экспериментальная установка для измерения времен затухания люминесценции\nредкоземельных ионов в конденсированных средах (кристаллах, стеклах и растворах). С\nиспользованием методики, позволяющей устранить влияние перепоглощения излучения,\nпроведены измерения времени затухания люминесценции ионов Yb3+ в крист…
Regenerative titanium dioxide (TiO2) photoelectrochemical solar cells are regarded as a potential low-cost alternative to conventional solid-state photovoltaic devices such as silicon-based solar cells, However, charge collection and transport in TiO2-based devices is poor - significant charge recombination occurs due…
In this paper, the processes of birth, decay and formation of stable polytetrahedral nanoclusters in the structure of amorphous alloy Cu80Zr20 in the process of quenching from the liquid phase are studied by the molecular dynamics method
The influence of microwave frequencies at high temperature on the structural properties of Boron Nitride (BN) powder had been investigated. Crystallite size, microstrain and the graphitization index (G.I.) were determined before and after the microwave measurements. The x-ray diffraction patterns showed a remarkable i…
Aluminium doped zinc oxide (ZnO:Al) films prepared by magnetron sputter deposition and surface textured by etching are widely applied in silicon thin film solar cells. Based on 15 years of experience in ZnO texturization for solar cell application in our institute we propose an etch model, that describes the interacti…
Manganese oxides typically form by the oxidation of aqueous Mn(II) catalyzed by mineral surfaces and are nonspecific but potent redox-active mineral components commonly found in the environment. They therefore participate in a wide array of reactions with organic and inorganic compounds. They often exhibit high sorpti…
Our presented research is focused on cross section measurements of (n,xn gamma) reactions in the framework of Generation IV nuclear reactors studies. Indeed the development of new fast reactors or the investigations concerning new fuel cycles require the improvement of nuclear data bases over a wide range of energies,…
Topological insulators(TIs) constitute a novel state of quantum matter which possesses non-trivial topological properties. Although discovered only in the recent few years, TIs have attracted intensive interest among the community of condensed matter physics and material science. TIs are insulating in the bulk but ha…
At different heating rates, the glass transition temperature (T g) and the crystallization temperature (Tc) are obtained from the non-isothermal differential scanning calorimetry (DSC) measurements of bulk Ga15Se85-xAgx (x = 0, 2, 4, 6 and 8) chalcogenide glasses prepared by melt quenching technique. Their amorphous s…
采用快速共沉淀法制备Ni0.8Co0.1Mn0.1（OH）2前驱体,利用前驱体与LiOH.H2O的高温固相反应得到锂离子电池层状正极材料LiNi0.8Co0.1Mn0.1O2,探讨pH值对材料结构和电化学性能的影响。通过X射线衍射（XRD）、扫描电镜（SEM）和电化学测试对合成样品进行表征。结果表明,pH值为11.00~12.00时,合成的Ni0.8Co0.1Mn0.1（OH）2前驱体均无杂相;pH值为11.50时,合成的前驱体制备出的正极材料具有良好的电化学性能,0.1C倍率下首次放电比容量为192.4 mA.h/g;经过40次循环,容量保持率为91.56%。
The production and use of Ra-226 sealed sources was internationally recommended to be halted for health and safety reasons. Consequently, all Ra-226 sources in Cuba were collected, characterized and conditioned. The paper describes the safety and operational aspects related to the Ra-226 conditioning. For this, a Spec…
Symposium: P - Bio-inspired and bio-integrated materials as new frontiers nanomaterials: abstract P.V4
In order to achieve a significant reduction in volume over standard dielectric λsub/4 cavity slot antenna designs, while concurrently maintaining usable gains >2-3 dB, realizable high permeability oriented cobalt-substituted Z-Type barium hexaferrite materials have been introduced through a modified aqueous synthesis…
This paper explores the temperature dependent heterojunction behavior of n-type zinc oxide (ZnO) nanowires/p-Si diodes. The device behavior at different temperatures in forward as well as reverse biased conditions are studied and reported. From the detailed electrical properties, it is confirmed that the fabricated p-…
This study examined the possibility of corrosion inhibition of CuNiFe alloy in 0,5 mol/dm3 NaCl sloution at 250C, by means of gentisic and p-coumaric acid. The presence of these acids was found in the first acid fenolic subfraction of aqueous extract of rosemary leaves (Rosmarius officinalis L). Potentiodynamic polari…
An approach for constructing a continuum-molecular model of a polymer material is proposed. The approach has the following advantages. It combines the convenience of dealing with the continuum representation, which permits numerically analyzing complicated processes on the nanolevel with the characteristic time measur…
This chapter is a continuation of ultracapacitor application case studies with focus on heavy transportation. Public transportation systems and vehicles in particular are becoming more of a focus by regulatory agencies as a sector to promote energy efficiency. Energy efficiency now has the connotation of energy securi…
TiO2 nanorod (NR) array/poly(3-hexylthiophene) (P3HT) heterojunction solar cells have been fabricated in this study. The vertically aligned single crystal TiO2 nanorod (NR) array was synthesized on the FTO substrate by hydrothermal method. Significant enhancement of the cell efficiency is achieved by interfacial modif…
本研究以聚四甲基醚二醇 (Polytetramethylene ether glycol; PTMG) 、六亞甲基二異氰酸酯 (1,6-Hexamethylene diisocyanate; HDI) 及1,4-丁二醇 (1,4-Butanediol; 1,4-BD) 為原料，合成兩種不同硬鏈段含量之熱塑型聚胺基甲酸酯樹脂 (Thermoplastic polyurethane; TPU) ，並將其與四乙基矽氧烷 (Tetraethoxysilane; TEOS) 混合後藉由溶膠-凝膠法 (Sol-gel process) 製備有機-無機混成材料，進一步則利用多元醇液化柳杉取代部分PTMG合成液化木材改質TPU樹脂 (LTPU)…
This paper addresses modeling and optimization of loading path in T-shape hydroforming of tubes. A set of experimental data designed by DOE method is used to assess the influence of loading process parameters in hydroformed geometry. The minimum thickness and maximum height of protrusion are used as formability criter…