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

doi:10.1063/1.2798390

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 journal › Article › peer-review

132 Scopus citations

Abstract

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 language	English (US)
Article number	084303
Journal	Journal of Applied Physics
Volume	102
Issue number	8
DOIs	https://doi.org/10.1063/1.2798390
State	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.2798390

Cite this

@article{0c3b81928765415e946eff3f7c4516ad,

title = "Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization",

abstract = "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.",

author = "He, {J. H.} and Lin, {Yen H.} and McConney, {Michael E.} and Tsukruk, {Vladimir V.} and Wang, {Zhong L.} and Gang Bao",

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.",

year = "2007",

doi = "10.1063/1.2798390",

language = "English (US)",

volume = "102",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "AIP Publishing",

number = "8",

}

TY - JOUR

T1 - Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization

AU - He, J. H.

AU - Lin, Yen H.

AU - McConney, Michael E.

AU - Tsukruk, Vladimir V.

AU - Wang, Zhong L.

AU - Bao, Gang

N1 - 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.

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=35648940250&partnerID=8YFLogxK

U2 - 10.1063/1.2798390

DO - 10.1063/1.2798390

M3 - Article

AN - SCOPUS:35648940250

SN - 0021-8979

VL - 102

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

M1 - 084303

ER -

Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this