共 37 条
TiO2 nanobelts/CdSSe quantum dots nanocomposite
被引:55
作者:

Chong, Shen V.
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机构: Ind Res Ltd, Lower Hutt 5040, New Zealand

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Xia, James
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机构: Ind Res Ltd, Lower Hutt 5040, New Zealand

Al-Salim, Najeh
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机构: Ind Res Ltd, Lower Hutt 5040, New Zealand

Idriss, Hicham
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机构: Ind Res Ltd, Lower Hutt 5040, New Zealand
机构:
[1] Ind Res Ltd, Lower Hutt 5040, New Zealand
[2] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand
[3] Univ Auckland, Dept Chem, Auckland 1142, New Zealand
关键词:
D O I:
10.1021/jp072579u
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
This work presents the successful noncovalent attachment of similar to 5 nm diameter cadmium-sulfur-selenium (CdSSe) quantum dots on strips of anatase TiO2 nanobelts. The TiO2 nanobelts were hydrothermally synthesized from a strong alkaline solution and subsequently heat-treated to achieve the anatase phase. The self-assembled-monolayer (SAM) technique was employed to attach the quantum dots onto the nanobelts. Due to the hydrophobic nature of the quantum dots, the surface of the nanobelts was first self-assembled with a layer of hydrophobic organic layer before both mixtures were added together. The resulting nanostructure assembly and composition was confirmed via transmission-electron-microscopy (TEM) imaging, Raman spectroscopy, UV-visible absorption spectroscopy (UV-vis), and X-ray photoelectron spectroscopy (XPS). Both Raman and UV-vis spectroscopies indicate evidence of interactions between the quantum dots and nanobelts. The visible-light sensitizing effect of the quantum dots was demonstrated in photocurrent experiments.
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页码:10389 / 10393
页数:5
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