نتایج جستجو برای: nonmetallic materials

تعداد نتایج: 436697  

Journal: :The Journal of the Acoustical Society of America 1994

Journal: :Chemical synthesis 2023

Modulating the electrocatalytic performance of Palladium (Pd) with nonmetallic elements (e.g., H, B, C, N, O, P and S) has gained ever-increasing attention since their introduction been proven to effectively modulate 3d-electronic configuration subsurface properties Pd. In this review, most advanced nonmetal-modified Pd-based catalysts are classified according different doped atoms (i.e., hydri...

Journal: :Mining of Mineral Deposits 2022

Purpose. The present paper aims to develop methodological principles for the selection of effective parameters resource-saving technologies while developing water-bearing titanium-zirconium deposits basing on complex analytical studies. Methods. applies a research methods: – analyze and generalize main differences development technology placer problem statement; technical-economic analysis iden...

Journal: :The Journal of chemical physics 2005
Yan Zhao Nathan E Schultz D G Truhlar

By incorporating kinetic-energy density in a balanced way in the exchange and correlational functionals and removing self-correlation effects, we have designed a density functional that is broadly applicable to organometallic, inorganometallic, and nonmetallic bonding, thermochemistry, thermochemical kinetics, and noncovalent interactions as well as satisfying the uniform electron gas limit. Th...

Journal: :Physical review. B, Condensed matter 1996
Nakamura Kodama Sakita Maeno Fujita Takahashi Môri

Pressure dependence of out-of-plane resistivity rc has been investigated in an optimally-doped high-Tc cuprate La22xSr xCuO4. By applying pressure, we found a drastic decrease in rc which reaches 50% at P58 GPa. This surprisingly large P dependence implies that the thermal contraction along the c axis is significantly reflected in the rc(T) curve, leading to a metal-like term; hence La22xSr xCu...

2015
Kursad Zengin Mustafa Yasar Ozdamar Sebahattin Albayrak Serhat Tanik Muhittin Atar Hasan Bakirtas Muhammed Abdurrahim Imamoglu Mesut Gurdal

Penile tourniquet syndrome (PTS), a rare urologic emergency, may lead to undesirable results including necrosis and amputation of penis, if not diagnosed and treated appropriately. Sometimes these injuries may be accepted as a forensic case. Miscellaneous objects used for strangulation can be metallic or nonmetallic. Of all ages, the most vulnerable period is infancy. Telogen effluvium is the m...

2004
P. VAJEESTON P. RAVINDRAN

A systematic high-pressure study on LiAlH4 and NaAlH4 has been carried out using density-functional total-energy calculations. From the theoretical simulations, it is found that both LiAlH4 and NaAlH4 are subject to structural phase transitions at high pressure. α-LiAlH4 transforms to β-LiAlH4 (α-NaAlH4–type structure) at 2.6 GPa with a huge volume collapse of ca. 22 % (according to equilibrium...

Journal: :The journal of physical chemistry. B 2006
M A Uijttewaal G A de Wijs R A de Groot

Lanthanum hexaboride is one of the cathode materials most used in high-power electronics technology, but the many experimental results do not provide a consistent picture of the surface properties. Therefore, we report the first ab initio calculations of the work functions and surface energies of the (001), (011), (111), (112), and (012) surfaces by considering the different surface termination...

Journal: :Journal of the American Chemical Society 2015
Thomas J Kempa D Kwabena Bediako Evan C Jones Charles M Lieber Daniel G Nocera

The development of high-throughput and scalable techniques for patterning inorganic structures is useful for the improved function and efficiency of photonic and energy conversion devices. Here we demonstrate a facile and rapid electrochemical method for patterning periodic metallic and nonmetallic submicron structures over large areas. Si substrates have been patterned with arrays of periodica...

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