TiO2 Nanobelts/CdSSe Quantum Dots Nanocomposite

Shen V. Chong, Narayanaswamy Suresh, James Xia, Najeh Al-Salim, Hicham Idriss

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)10389-10393
Number of pages5
JournalThe Journal of Physical Chemistry C
Volume111
Issue number28
Early online date27 Jun 2007
DOIs
Publication statusPublished - 19 Jul 2007

Keywords

  • photocatalytic properties
  • nanocrystalline TIO2
  • titanate nanotubes
  • solar-cells
  • nanowires
  • electrodes
  • raman
  • CDSE
  • films
  • photosensitization

Cite this

Chong, S. V., Suresh, N., Xia, J., Al-Salim, N., & Idriss, H. (2007). TiO2 Nanobelts/CdSSe Quantum Dots Nanocomposite. The Journal of Physical Chemistry C, 111(28), 10389-10393. https://doi.org/10.1021/jp072579u