Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization

J. H. He*, Yen H. Lin, Michael E. McConney, Vladimir V. Tsukruk, Zhong L. Wang, Gang Bao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Scopus citations


UV photodetector fabricated using a single ZnO nanobelt (NB) has shown a photoresponse enhancement up to 750 times higher than that of a bare ZnO NB after coating with ∼20 nm plasma polymerized acrylonitrile (PP-AN) nanoscale film. The mechanism for this colossal photoconductivity is suggested as a consequence of the efficient exciton dissociation under UV illumination due to enhanced electron transfer from valence band of ZnO NB to the PP-AN and then back to the conduction band of ZnO. This process has demonstrated an easy and effective method for improving the performance of the nanowireNB-based devices, possibly leading to supersensitive UV detector for applications in imaging, photosensing, and intrachip optical interconnects.

Original languageEnglish (US)
Article number084303
JournalJournal of Applied Physics
Issue number8
StatePublished - 2007
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported in part by the National Heart Lung and Blood Institute of the NIH as a Program of Excellence in Nanotechnology (1U01HL80711 to G.B.) and by the National Cancer Institute of the NIH as a Center of Cancer Nanotechnology Excellence (5U54CA119338 to G.B. and Z.L.W.). The authors thank T. J. Bunning, H. Jiang, and J. O. Enlow (AFRL) for technical assistance.

ASJC Scopus subject areas

  • General Physics and Astronomy


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