Photocurrent amplification at carbon nanotube-metal contacts

Der-Hsien Lien*, Wen Kuang Hsu, Hsiao-Wen Zan, Nyan H. Tai, Chuen Horng Tsai

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

55 Scopus citations


The generation of photocurrent at single-walled carbon nanotube (SWNT)-electrode contacts at zero bias was determined. The current produced can be amplified significantly by a factor of 4-7 upon application of a bias and, higher currents are always achieved at the electrode opposite to that with positive bias. It was found that the current build-up at negative bias is faster by a factor of 6-7 as compared to that of positive-bias operation. The results suggest that the electrostatic potential within nanotubes is highly sensitive to external electric fields at the junction region.

Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalAdvanced Materials
Issue number1
StatePublished - 5 Jan 2006



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