CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Dynamic surface wettability of three-dimensional graphene foam |
Huang Wen-Bin (黄文斌)a, Wang Guang-Long (王广龙)a, Gao Feng-Qi (高凤岐)a, Qiao Zhong-Tao (乔中涛)a, Wang Gang (王刚)b, Chen Min-Jiang (陈闽江)b, Tao Li (陶立)b, Deng Ya (邓娅)b, Sun Lian-Feng (孙连峰)b |
a Institute of Nanotechnology and Microsystems, Mechanical Engineering College, Shijiazhuang 050003, China;
b National Center for Nanoscience and Technology, Beijing 100190, China |
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Abstract In this work, three-dimensional graphene foams (GFs) are synthesized and characterized by scanning electron microscope (SEM) and Raman spectroscopy. The SEM images indicate that after the growth of graphene, the graphene covers the surface of nickel (Ni) foam uniformly. Raman spectra show that the percentages of monolayer, bilayer, trilayer, and multilayer graphenes are ~ 58%, ~ 32%, ~ 8%, and ~ 2%, respectively. The contact angle (CA) (~ 12°) of water droplet (3 μL) on GF is found to be larger than that on Ni foam (~ 107°), indicating that graphenes have changed the surface wettability of the Ni foam. Meanwhile, the dynamic characteristics of CA of water droplet on GF are different from those on Ni foam. The mechanisms for different behaviors are discussed, which are attributed to volatilization and seepage of water droplets.
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Received: 21 August 2013
Revised: 09 October 2013
Accepted manuscript online:
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PACS:
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68.08.De
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(Liquid-solid interface structure: measurements and simulations)
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68.35.Ja
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(Surface and interface dynamics and vibrations)
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81.15.Gh
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(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10774032 and 90921001) and the Key Knowledge InnovationProject of the Chinese Academy of Sciences on Water Science Research, Instrument DevelopingProject of the Chinese Academy of Sciences (Grant No. Y2010031). |
Corresponding Authors:
Sun Lian-Feng
E-mail: slf@nanoctr.cn
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About author: 68.08.De; 68.35.Ja; 81.15.Gh |
Cite this article:
Huang Wen-Bin (黄文斌), Wang Guang-Long (王广龙), Gao Feng-Qi (高凤岐), Qiao Zhong-Tao (乔中涛), Wang Gang (王刚), Chen Min-Jiang (陈闽江), Tao Li (陶立), Deng Ya (邓娅), Sun Lian-Feng (孙连峰) Dynamic surface wettability of three-dimensional graphene foam 2014 Chin. Phys. B 23 046802
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