Materials Literature
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Surface morphology and structural-phase changes in polycrystalline V 2 O 5 under the influence of a high-power nanosecond ion beam with a current density of 20–100 A/cm 2 were studied. It was revealed that a single action of the beam with a current density of 50 A/cm 2 leads to formation on the V 2 O 5 surface of a co…
Principally, metal ceramic bonding were determined by availability of forming oxide layer on the interface between metal and ceramic. Only a thin film of oxide layer that needed for provide sufficient adherence. Many investigations were done in order to increase this condition, for example kinds of treatment on the in…
PART I The energy spectrum of heavily-doped molecular crystals was treated in the Green’s function formulation. The mixed crystal Green’s function was obtained by averaging over all possible impurity distributions. The resulting Green’s function, which takes the form of an infinite perturbation expansion, was further…
PbMoO 4 산화물을 수열합성법과 마이크로파 공정으로 합성하여 XRD, DRS, BET, Raman, SEM 및 PL 등에 의해 특성분석을 하였고, 자외선 조사 하에서 Rhodamine B의 광분해 반응에서의 활성을 조사하였다. XRD 및 Raman의 분석 결과로부터 대부분의 촉매들은 제조방법과 무관하게 잘 결정화된 PbMoO₄ 구조를 가지고 있었으며 42에서 59 ㎚의 크기를 나타내었다. 마이크로파 공정으로 제조된 PbMoO₄ 촉매는 통상적인 수열합성법으로 제조된 촉매에 비해 균일한 입자를 가지고 있으며, 높은 광분해 활성을 나타내었다. 마이크로파 주사 시간을…
Abstract C14H14CoO6, monoclinic, C2/m (no. 12), a = 7.3910(5) Å, b = 7.4029(6) Å, c = 13.012(1) Å, β = 90.573(1)°, V = 711.9 Å3, Z = 2, Rgt(F) = 0.0373, wRref(F2) = 0.1026, T = 298 K.
Room-temperature ferromagnetism induced by Cu vacancies in Cux(Cu2O)1−x granular films* , Xie, Xin-Jian, Li, Hao-Bo, Wang, Wei-Chao, Lu, Feng, Yu, Hong-Yun, Wang, Wei-Hua, Cheng, Ya-Hui, Zheng, Rong-Kun, Liu, Hui
University of Minnesota Ph.D. dissertation. September 2015. Major: Electrical/Computer Engineering. Advisor: Philip Cohen. 1 computer file (PDF); xiv, 113 pages.
The kesterite Cu 2 ZnSnSe 4 (CZTSe) thin film solar cells were synthesized by selenization of sputtered Cu/Sn/Zn metallic precursors on Mo coated soda lime glass substrate in Ar atmosphere. Cu/Sn/Zn metallic precursors were deposited by DC magnetron sputtering process with 30 W power at room temperature. As-deposited…
Placental insufficiency is a serious medical condition responsible for most of IUGR and pre-eclampsia cases. Dynamic contrast enhancement MRI (DCE-MRI) in pregnant women measures placental perfusion and may pick up placental insufficiency before it becomes symptomatic or allow better management. However this technique…
Photosynthesis is a highly efficient and productive process that converts solar energy into chemical energy.Much of the visible and near-infrared radiation falling on the surface of the Earth is not absorbed by photosynthesising organisms, which occupy particular spectral niches depending on the absorption of the part…
Elastic properties of glassy materials were studied in comparison to the isochemical crystalline phases. Structural changes were studied by density-functional theory with respect to electronic, vibrational, mechanical and thermodynamic properties. It turned out that topology is essential for elastic moduli. For both,…
ZnO is gathering great interest for large square optoelectrical devices of flat panel display (FHD) and solar cell as a transparent conductive oxide (TCO). Herewith, Mg and IIIA (Al, In) co-doped ZnO films were prepared on SLG substrate using RF magnetron sputtering system. The effect of variation of atomic weight % o…
In this paper, heterostructures with self-organized quantum dots have been produced using incongruent evaporation. Island films on the basis of the intermediate phases forming in the Sn–Se have been grown. The surface morphology of the structures has been studied using atomic force microscopy (AFM). A certain change o…
Sulfur-modified zirconia with various S contents have been characterized and analyzed for potential applications in dosimetry. The thermoluminescent signal induced by gamma radiation in pure zirconia and sulfated zirconia in the tetragonal phase has been considered. Experimental results show that the thermoluminescent…
Due to the prospective partial replacement of fossil fuels by biodiesel, its production has continuously grown in the last decade. The increase in global biodiesel production demands the development of sustainable applications of its main by-product, crude glycerol. In this thesis the feasibility of producing polyhydr…
Effect of Mn-site disorder in La0.67Ca0.33Mn1-xSbxO3 (LCMSO) created by the substitution of Sb5+ at Mn-site is studied through X-ray diffraction (XRD) and temperature dependent resistivity measurements to identify the role of size mismatch at Mn-site and their resistivity property correlations. XRD patterns collected…
The interest in chromium (Cr) arises from the widespread use of this heavy metal in various industrial processes that cause its release as liquid, solid and gaseous waste into the environment. The impact of Cr on the environment and living organisms primarily depends on its chemical form, since Cr(III) is an essential…
The dependence of a scalar measure of the structural changes occurring in a material under plastic deformation on a plastic strain measure and the dependence of a free energy measure on a structural change measure are constructed using experimental data that allow the expended plastic work to be divided into a latent…
In this study, a possible method of reducing the flashover stress is achieved by the effect of an additional magnetic field in the transverse direction on the main applied electric field. The degree of vacuum used in this study was [Formula: see text] Pa. The magnetic flux density B employed in this study extends from…
Lo scopo di questa tesi e fare il punto sui risultati ottenuti nello studio dei materiali di prima parete dei reattori a fusione, concentrando l' attenzione sul problema di accumulo e rilascio di D e T nel tungsteno, materiale scelto a tal scopo.