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Beaklike SnO 2 Nanorods with Strong Photoluminescent and Field‐Emission Properties
Author(s) -
He Jr H.,
Wu Te H.,
Hsin Cheng L.,
Li Kun M.,
Chen Lih J.,
Chueh Yu L.,
Chou Li J.,
Wang Zhong L.
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200500210
Subject(s) - nanorod , photoluminescence , materials science , field electron emission , nanotechnology , optoelectronics , chemical engineering , physics , quantum mechanics , engineering , electron
Beaklike SnO 2 nanorods were synthesized by a vapor–liquid–solid approach using Au as a catalyst. The nanorods grow along the [10 $\bar 1$ ] direction and the beak is formed by switching the growth direction to [1 $\bar 1$ $\bar 2$ ] through controlling the growth conditions at the end of the synthesis. The photoluminescence (PL) spectrum of the nanorods exhibits visible light emission with a peak at 602 nm. The field‐emission (FE) properties of the nanorods have been measured to exhibit a turn‐on field of 5.8 V μm −1 . A comparative study of FE measurements between SnO 2 nanorods with uniform diameters and these beaklike nanorods suggests that the shape and curved tips are important factors in determining the FE properties.