中国物理B ›› 2009, Vol. 18 ›› Issue (1): 324-332.doi: 10.1088/1674-1056/18/1/053

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Growth mechanism and photoluminescence of the SnO2 nanotwists on thin film and the SnO2 short nanowires on nanorods

王冰, 徐平   

  1. Shenzhen Key Lab of Micro-nano Photonic Information Technology, School of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China
  • 收稿日期:2008-06-16 修回日期:2008-08-19 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the Fund of Shenzhen Key Lab of Micro-nano Photonic Information Technology, China (Grant No 2000811), the National Natural Science Foundation of China (Grant No 10704050) and Fok Ying Tung Educational Foundation (Grant No 114009).

Growth mechanism and photoluminescence of the SnO2 nanotwists on thin film and the SnO2 short nanowires on nanorods

Wang Bing(王冰)† and Xu Ping(徐平)   

  1. Shenzhen Key Lab of Micro-nano Photonic Information Technology, School of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China
  • Received:2008-06-16 Revised:2008-08-19 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the Fund of Shenzhen Key Lab of Micro-nano Photonic Information Technology, China (Grant No 2000811), the National Natural Science Foundation of China (Grant No 10704050) and Fok Ying Tung Educational Foundation (Grant No 114009).

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摘要： SnO2 nanotwists on thin film and SnO2 short nanowires on nanorods have been grown on single silicon substrates by using Au--Ag alloying catalyst assisted carbothermal evaporation of SnO2 and active carbon powders. The morphology and the structure of the prepared nanostructures are determined on the basis of field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area electronic diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), x-ray diffraction (XRD), Raman and photoluminescence (PL) spectra analysis. The new peaks at 356, 450, and 489 nm in the measured PL spectra of two kinds of SnO2 nanostructures are observed, implying that more luminescence centres exist in these SnO2 nanostructures due to nanocrystals and defects. The growth mechanism of these nanostructures belongs to the vapour--liquid--solid (VLS) mechanism.

Abstract: SnO2 nanotwists on thin film and SnO2 short nanowires on nanorods have been grown on single silicon substrates by using Au--Ag alloying catalyst assisted carbothermal evaporation of SnO2 and active carbon powders. The morphology and the structure of the prepared nanostructures are determined on the basis of field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area electronic diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), x-ray diffraction (XRD), Raman and photoluminescence (PL) spectra analysis. The new peaks at 356, 450, and 489 nm in the measured PL spectra of two kinds of SnO2 nanostructures are observed, implying that more luminescence centres exist in these SnO2 nanostructures due to nanocrystals and defects. The growth mechanism of these nanostructures belongs to the vapour--liquid--solid (VLS) mechanism.

Key words: nanostructures, crystal growth, photoluminescence

中图分类号:  (Methods of micro- and nanofabrication and processing)

  • 81.16.-c
61.05.jm (Convergent-beam electron diffraction, selected-area electron diffraction, nanodiffraction) 61.46.-w (Structure of nanoscale materials) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 68.37.Lp (Transmission electron microscopy (TEM)) 78.55.Hx (Other solid inorganic materials)