Well-Aligned Multi-Walled Carbon Nanotubes and Their Photoresponse
In this paper we report efficient growth of well-aligned multi-walled carbon nanotube (MWNT) forest by chemical vapor deposition (CVD). Under optimized parameters, the growth rate can be 15 μm/min and the average diameter is about 10 nm. Large photocurrent can be generated in a bundle of MWNT using camera flash. The photocurrent depends linearly on the light intensity. We propose that photon induced electron-hole pair generation in multi-walled carbon nanotubes and subsequent charge separation across the Schottky barrier is the main origin of the photocurrent.
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Document Type: Research Article
Publication date: 2009-02-01
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