Photochromic Properties of MoO3 and Au Nanoparticles Composite Thin Films

Chem. J. Chinese Universities ›› 2001, Vol. 22 ›› Issue (5): 824.

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Photochromic Properties of MoO₃ and Au Nanoparticles Composite Thin Films

HE Tao¹, YIN Yan-Hua¹, MA Ying¹, JIANG Peng², CAO Ya-An¹, YAO Jian-Nian¹

1. Center for Molecular Science, Institute of Chemistry, Laboratory of Photochemistry, Chinese Academy of Sciences, Beijing 100080, China;
2. Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2000-08-31 Online:2001-05-24 Published:2001-05-24

Abstract

Abstract: 1-Nonanethiol capped gold nanoparticles were firstly used to modify the surface of MoO₃ thin films in order to fabricate the MoO₃/Au composite thin film. Absorption experiments and XPSmeasurements were used to investigate the effect of Au nanoparticles on the photochromic properties of the composite thin film. According to the XPSmeasurements, the binding energy for the valence band(O_2p ) of the composite thin films decreased. The experimental results of absorbance showed that the photochromic efficiency for the composite thin films became at least as two times as that of MoO₃ thin films. The mechanism of enhancement can be explained by the band energy theory of semiconductor. The Schottky barrier formed at the interface prolonged the electron hole pair separation lifetime and resulted in the enhancement of the photochromic efficiency.

Key words: MoO₃, Gold nanoparticles, Photochromism, Composite thin films

CLC Number:

TB34
O647.11

TrendMD:

HE Tao, YIN Yan-Hua, MA Ying, JIANG Peng, CAO Ya-An, YAO Jian-Nian . Photochromic Properties of MoO₃ and Au Nanoparticles Composite Thin Films[J]. Chem. J. Chinese Universities, 2001, 22(5): 824.

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Photochromic Properties of MoO₃ and Au Nanoparticles Composite Thin Films

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