نتایج جستجو برای: thick hollow sphere

تعداد نتایج: 93335  

Journal: :Journal Of Geophysical Research: Planets 2022

The InSight lander rests on a regolith-covered, Hesperian to Early Amazonian lava plain in Elysium Planitia within ∼27-m-diameter, degraded impact crater called Homestead hollow. km cm-scale stratigraphy beneath the is relevant mission's geophysical investigations. Geologic mapping and statistics indicate that ∼170 m of mostly basaltic lavas are underlain by Noachian (∼3.6 Ga) materials possibl...

Journal: :Astrophysics 2021

Various solutions of the kinetic equation for equilibrium a gravitating sphere uniform density with quadratic gravitational potential and linear dependence force on radius are examined. New analytic obtained hollow spherical volume central mass inside sphere. Solutions also an arbitrary number layers same density, but different distribution functions.

Journal: :Chemical communications 2014
Xunfu Zhou Yingju Liu Xin Li Qiongzhi Gao Xiaotang Liu Yueping Fang

Novel SnO2/SiC hollow sphere nanochains were synthesized by topological morphology conversion of SnO2@C core-shell nanochains through a vapour-solid reaction. Evaluation of the SnO2/SiC HSNCs for the generation of hydrogen revealed that they exhibit excellent catalytic activity and durability.

Journal: :Chemical communications 2012
Swapan K Das Manas K Bhunia Debrup Chakraborty Anisur Rahman Khuda-Bukhsh Asim Bhaumik

Mesoporous phosphosilicate nanoparticles of hollow sphere architecture have been prepared hydrothermally for the first time under acidic pH conditions and this material is found to be efficient in encapsulating an antibiotic drug and its controlled release at physiological pH for possible cargo delivery applications.

Journal: :Optics letters 2011
M Pang W Jin

A polarization controller was built by pressurizing laterally three segments of a commercial hollow-core photonic bandgap fiber. By varying the magnitudes of the applied pressures, the output state of polarization showed a good coverage of all the possible polarization states on the surface of the Poincaré sphere.

Journal: :Nano letters 2011
Yan Yao Matthew T McDowell Ill Ryu Hui Wu Nian Liu Liangbing Hu William D Nix Yi Cui

Silicon is a promising candidate for the anode material in lithium-ion batteries due to its high theoretical specific capacity. However, volume changes during cycling cause pulverization and capacity fade, and improving cycle life is a major research challenge. Here, we report a novel interconnected Si hollow nanosphere electrode that is capable of accommodating large volume changes without pul...

2009
Andreas Öchsner Seyed Mohammad Hossein Hosseini Markus Merkel

This paper investigates the thermal properties of a new type of hollow sphere structures. For this new type, the sphere shell is perforated by several holes in order to open the inner sphere volume and surface. The effective thermal conductivity of perforated sphere structures in several kinds of arrangements is numerically evaluated for different hole diameters. The results are compared to cla...

Journal: :Chemical communications 2010
Myeong-Hee Lee Jin-Young Kim Hyun-Kon Song

We report on the evolution of a hollow sphere secondary structure of spherical nanoparticles by a solubilization-reprecipitation mechanism based on the difference of solubility products (K(sp)) of two different precipitates. Carbon-coated nanoparticles of olivine structure LiFePO(4) served as the primary nano-blocks to build the secondary nano-architecture.

Journal: :Chemical communications 2011
Xin-Hui Xia Jiang-Ping Tu Xiu-Li Wang Chang-Dong Gu Xin-Bing Zhao

A Co(3)O(4) monolayer hollow-sphere array with mesoporous walls exhibits high pseudocapacitances of 358 F g(-1) at 2 A g(-1) and 305 F g(-1) at 40 A g(-1), as well as excellent cycling stability for application as pseudocapacitors.

2012
Lili Feng Chunlei Zhang Guo Gao Daxiang Cui

Herein, we report that octahedral and spherical Cu2O samples with hollow structures are synthesized in high yield by reducing Cu(EDA)22+ complex with hydrazine. A series of experiments are carried out to investigate the factors which impact on the morphology of the Cu2O samples. It is observed that ethylenediamine (EDA) serves as a molecular template in the formation of hollow structure. Octahe...

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