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Origin of green emission from ZnS nanobelts as revealed by scanning near-field optical microscopy

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4 Author(s)
Tsuruoka, T. ; International Center for Materials Nanoacrhitectonics (MANA), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan ; Liang, C.H. ; Terabe, K. ; Hasegawa, T.

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The emission properties of ZnS nanobelts synthesized through thermal evaporation were investigated by means of scanning near-field optical microscopy. The photoluminescence (PL) images of single nanobelts exhibited a bright line along their length. The local light emission spectra measured over the bright lines showed a green emission peak around 535 nm, which was in good agreement with a PL peak obtained for an ensemble of the nanobelts. From careful scanning-electron-microscopy observations of identical nanobelts, we found that the observed green emission is related to line or planar defects of the ZnS nanobelts.

Published in:

Applied Physics Letters  (Volume:92 ,  Issue: 9 )

Date of Publication:

Mar 2008

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