نتایج جستجو برای: freestanding films

تعداد نتایج: 92538  

2007
D. P. Young A. B. Karki P. W. Adams Johnpeter N. Ngunjiri Jayne C. Garno Hongwei Zhu Bingqing Wei D. Moldovan

Freestanding, vertical, multiwall carbon nanotubes (MWCNT) are formed during the vacuum deposition of thin films of the metastable carbides CT3 (T = Ni, Co) onto fire-polished glass substrates. In contrast to widely used chemical and laser vapor deposition techniques, we utilize direct e-beam evaporation of arc-melted CT3 targets to produce MWCNs that are self-assembled out of the CT3-film matr...

Journal: :Nanotechnology 2014
Yantong Xu Xi Ke Changchun Yu Shaofang Liu Jie Zhao Guofeng Cui Drew Higgins Zhongwei Chen Qing Li Gang Wu

We report a novel strategy for the fabrication of nanoporous gold (NPG) films. The fabrication process involves the electrodeposition of a gold-tin alloy, followed by subsequent chemical dealloying of tin. Scanning electron microscopy (SEM) images show a bicontinuous nanoporous structure formed on the substrates after chemical dealloying. Energy dispersive x-ray (EDX) analysis indicates that th...

2003
H. D. Espinosa B. Peng B. C. Prorok N. Moldovan D. C. Mancini

The fracture strength of ultrananocrystalline diamond ~UNCD! has been investigated using tensile testing of freestanding submicron films. Specifically, the fracture strength of UNCD membranes, grown by microwave plasma chemical vapor deposition ~MPCVD!, was measured using the membrane deflection experiment developed by Espinosa and co-workers. The data show that fracture strength follows a Weib...

2016
Kecheng Li Zheng Bo Jianhua Yan Kefa Cen

Graphene film has been demonstrated as promising active materials for electric double layer capacitors (EDLCs), mainly due to its excellent mechanical flexibility and freestanding morphology. In this work, the distribution and variation pattern of electrolyte ions in graphene-film based EDLC electrodes are investigated with a 11B magic-angle spinning nuclear magnetic resonance (MAS-NMR) spectro...

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