Reshaping the tips of ZnO nanowires by pulsed laser irradiation

Xue Wang; Yong Ding; Dajun Yuan; Jung Il Hong; Yan Liu; C. P. Wong; Chenguo Hu; Zhong Lin Wang

doi:10.1007/s12274-012-0222-5

Reshaping the tips of ZnO nanowires by pulsed laser irradiation

Xue Wang
, Yong Ding
, Dajun Yuan
, Jung Il Hong
, Yan Liu
, C. P. Wong
, Chenguo Hu
, Zhong Lin Wang

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical shape. Transmission electron microscopy revealed that the spherical tip is a single-crystalline piece connected to the body of the ZnO nanowire, and that the center of the sphere is hollow. The growth mechanism of the hollow ZnO nanospheres is proposed to involve laser-induced ZnO evaporation immediately followed by re-nucleation in a temperature gradient environment. The laser-irradiated ZnO nanowire array shows hydrophobic properties while the original ZnO nanowire array shows hydrophilicity. The as-grown ZnO nanowire arrays with hollow spherical tips can serve as templates to grow ZnO nanowire arrays with very fine tips, which may be a good candidate material for use in field emission and scanning probe microscopy.

Original language	English
Pages (from-to)	412-420
Number of pages	9
Journal	Nano Research
Volume	5
Issue number	6
DOIs	https://doi.org/10.1007/s12274-012-0222-5
State	Published - Jun 2012

Bibliographical note

Funding Information:
This research was supported by Basic Energy Sciences (BES), Department of Energy (DOE) and National Science Foundation (NSF). X. Wang and C. G. Hu acknowledge the support of NSFC (60976055) and the Postgraduates’ Science and Innovation Fund (201005B1A0010339) of Chongqing University. X. Wang also would like to acknowledge the fellowship from the China Scholarship Council (CSC) (2010605070).

Keywords

ZnO nanowires
fine ZnO tips
hollow ZnO nanospheres
laser irradiation
surface wettability

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10.1007/s12274-012-0222-5

Cite this

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title = "Reshaping the tips of ZnO nanowires by pulsed laser irradiation",

abstract = "Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical shape. Transmission electron microscopy revealed that the spherical tip is a single-crystalline piece connected to the body of the ZnO nanowire, and that the center of the sphere is hollow. The growth mechanism of the hollow ZnO nanospheres is proposed to involve laser-induced ZnO evaporation immediately followed by re-nucleation in a temperature gradient environment. The laser-irradiated ZnO nanowire array shows hydrophobic properties while the original ZnO nanowire array shows hydrophilicity. The as-grown ZnO nanowire arrays with hollow spherical tips can serve as templates to grow ZnO nanowire arrays with very fine tips, which may be a good candidate material for use in field emission and scanning probe microscopy.",

keywords = "ZnO nanowires, fine ZnO tips, hollow ZnO nanospheres, laser irradiation, surface wettability",

author = "Xue Wang and Yong Ding and Dajun Yuan and Hong, \{Jung Il\} and Yan Liu and Wong, \{C. P.\} and Chenguo Hu and Wang, \{Zhong Lin\}",

note = "Funding Information: This research was supported by Basic Energy Sciences (BES), Department of Energy (DOE) and National Science Foundation (NSF). X. Wang and C. G. Hu acknowledge the support of NSFC (60976055) and the Postgraduates{\textquoteright} Science and Innovation Fund (201005B1A0010339) of Chongqing University. X. Wang also would like to acknowledge the fellowship from the China Scholarship Council (CSC) (2010605070).",

year = "2012",

month = jun,

doi = "10.1007/s12274-012-0222-5",

language = "English",

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AU - Wang, Xue

AU - Ding, Yong

AU - Yuan, Dajun

AU - Hong, Jung Il

AU - Liu, Yan

AU - Wong, C. P.

AU - Hu, Chenguo

AU - Wang, Zhong Lin

N1 - Funding Information: This research was supported by Basic Energy Sciences (BES), Department of Energy (DOE) and National Science Foundation (NSF). X. Wang and C. G. Hu acknowledge the support of NSFC (60976055) and the Postgraduates’ Science and Innovation Fund (201005B1A0010339) of Chongqing University. X. Wang also would like to acknowledge the fellowship from the China Scholarship Council (CSC) (2010605070).

PY - 2012/6

Y1 - 2012/6

N2 - Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical shape. Transmission electron microscopy revealed that the spherical tip is a single-crystalline piece connected to the body of the ZnO nanowire, and that the center of the sphere is hollow. The growth mechanism of the hollow ZnO nanospheres is proposed to involve laser-induced ZnO evaporation immediately followed by re-nucleation in a temperature gradient environment. The laser-irradiated ZnO nanowire array shows hydrophobic properties while the original ZnO nanowire array shows hydrophilicity. The as-grown ZnO nanowire arrays with hollow spherical tips can serve as templates to grow ZnO nanowire arrays with very fine tips, which may be a good candidate material for use in field emission and scanning probe microscopy.

AB - Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical shape. Transmission electron microscopy revealed that the spherical tip is a single-crystalline piece connected to the body of the ZnO nanowire, and that the center of the sphere is hollow. The growth mechanism of the hollow ZnO nanospheres is proposed to involve laser-induced ZnO evaporation immediately followed by re-nucleation in a temperature gradient environment. The laser-irradiated ZnO nanowire array shows hydrophobic properties while the original ZnO nanowire array shows hydrophilicity. The as-grown ZnO nanowire arrays with hollow spherical tips can serve as templates to grow ZnO nanowire arrays with very fine tips, which may be a good candidate material for use in field emission and scanning probe microscopy.

KW - ZnO nanowires

KW - fine ZnO tips

KW - hollow ZnO nanospheres

KW - laser irradiation

KW - surface wettability

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SP - 412

EP - 420

JO - Nano Research

JF - Nano Research

IS - 6

ER -

Reshaping the tips of ZnO nanowires by pulsed laser irradiation

Abstract

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Keywords

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