Enhancing UV photoconductivity of ZnO nanobelt by polyacrylonitrile functionalization

被引：123

作者：

He, J. H. ^{[1
]}

Lin, Yen H.

McConney, Michael E.

Tsukruk, Vladimir V.

Wang, Zhong L.

Bao, Gang

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Sch Biomed Engn, Atlanta, GA 30332 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2007年 / 102卷 / 08期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1063/1.2798390

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 similar to 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 nanowire/NB-based devices, possibly leading to supersensitive UV detector for applications in imaging, photosensing, and intrachip optical interconnects.

引用

页数：4

共 36 条

[1] Enhanced emission and its switching in fluorescent organic nanoparticles [J].

An, BK ;

Kwon, SK ;

Jung, SD ;

Park, SY .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (48) :14410-14415

[2] Bulk acoustic resonator based on piezoelectric ZnO belts [J].

Buchine, Brent A. ;

Hughes, William L. ;

Degertekin, F. Levent ;

Wang, Zhong L. .

NANO LETTERS, 2006, 6 (06) :1155-1159

[3]

COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0

[4] Single-nanowire electrically driven lasers [J].

Duan, XF ;

Huang, Y ;

Agarwal, R ;

Lieber, CM .

NATURE, 2003, 421 (6920) :241-245

[5] Photoluminescence and polarized photodetection of single ZnO nanowires [J].

Fan, ZY ;

Chang, PC ;

Lu, JG ;

Walter, EC ;

Penner, RM ;

Lin, CH ;

Lee, HP .

APPLIED PHYSICS LETTERS, 2004, 85 (25) :6128-6130

[6] Conversion of zinc oxide nanobelts into superlattice-structured nanohelices [J].

Gao, PX ;

Ding, Y ;

Mai, WJ ;

Hughes, WL ;

Lao, CS ;

Wang, ZL .

SCIENCE, 2005, 309 (5741) :1700-1704

[7] Assembly of well-aligned multiwalled carbon nanotubes in confined polyacrylonitrile environments: Electrospun composite nanofiber sheets [J].

Ge, JJ ;

Hou, HQ ;

Li, Q ;

Graham, MJ ;

Greiner, A ;

Reneker, DH ;

Harris, FW ;

Cheng, SZD .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (48) :15754-15761

[8] Nanoscale avalanche photodiodes for highly sensitive and spatially resolved photon detection [J].

Hayden, O ;

Agarwal, R ;

Lieber, CM .

NATURE MATERIALS, 2006, 5 (05) :352-356

[9]

He JH, 2006, SMALL, V2, P116, DOI 10.1002/smll.200500210

[10]

HE JH, 2006, SMALL, V18, P650

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