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Preparation, Electrical Conductivity, Photocurrent and Wettability of Carbon Microcoils

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Abstract:

In this paper, we report on fabrication and physical properties of carbon microcoils, which are prepared by a chemical vapor deposition (CVD) process with Ni-catalyzed pyrolysis of acetylene, and characterized by a scanning electron microscope, a transmission electron microscope and an infrared spectrometer. The dark electrical conductivity of an isolated carbon microcoil is about 81 S/cm at room temperature, and its temperature dependence follows three-dimensional Mott variable-range hopping (VRH) model. Particularly, evident photocurrent is observed in the carbon microcoil upon cameral flash illumination. In addition, it is found that the surface of microcoil film is hydrophobic, showing a large water contact angle of about 135°. These results indicate that carbon microcoils have excellent physical properties, and can be used as optoelectronic and reinforced materials.

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Periodical:

Advanced Materials Research (Volume 465)

Pages:

125-131

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.465.125

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Online since:

February 2012

Authors:

Bin Sun, Hong Xing Yin, Meng Meng Li, Yun-Ze Long, Chang Zhi Gu

Keywords:

Carbon Microcoil, Conductivity, Contact Angle (CA), Photocurrent

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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