Artigo Acesso aberto Revisado por pares

Fabrication of patterned CdS/TiO2 heterojunction by wettability template-assisted electrodeposition

2010; Elsevier BV; Volume: 64; Issue: 11 Linguagem: Inglês

10.1016/j.matlet.2010.03.017

ISSN

1873-4979

Autores

Yuekun Lai, Zequan Lin, Zhong Chen, Jianying Huang, Changjian Lin,

Tópico(s)

Quantum Dots Synthesis And Properties

Resumo

A wettability template-assisted process was applied to selectively deposit cadmium sulfide (CdS) nanospheres on TiO2 nanotube layers to form uniformly coupled CdS/TiO2 semiconductor heterojunction micropatterns. The effect of deposition time on the size and morphology of the as-prepared CdS/TiO2 array patterns was investigated. It is shown that the CdS nanocrystals with a highly ordered, hierarchically porous structure in nano-micro dual scales could be selectively grown within the superhydrophilic regions. The patterned CdS/TiO2 heterojunctions have demonstrated enhanced photo-response under both UV and visible light irradiation. This novel template patterning technique, which is based on wettability contrast, can be applied to a broad range of technological areas, such as sensor arrays and optoelectronic devices.

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