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Fabrication and Electrochemical Characterization of Molecularly Alternating Self-Assembled Films and Capsules of Titania Nanosheets and Gold Nanoparticles

Author(s): Yong Zhou, Lian Z. Wang, Ren Z. Ma, Yasuo Ebina, Kazunori Takada, Takayoshi Sasaki.

Abstract:

A molecularly alternating self-assembled film and heterostructured capsule of titania nanosheets/gold nanoparticles has been successfully fabricated by layer-by-layer self-assembly of titania nanosheets and positively charged gold nanoparticles as electrostatic building blocks. The films were characterized with atomic force microscopy and UV-vis absorption spectroscopy. The nearly linear increase in both UV-vis absorbances as a function of the sequential assembly number demonstrates the regular growth of the composite film. The electrochemcial property of the fabricated (titania nanosheet/Au nanoparticle)n multilayer film was examined by measuring cyclic voltammograms. The heterostructured capsule from a UV-sensitive poly(methyl methacrylate) as a sacrificial template was characterized by field-emission scanning electron microscopy and transmission electron microscopy. The energy-dispersive X-ray spectrometer verifies the composition of Ti and Au elements of the heterostructured capsule.

Keywords: Layer-by-layer, Nanosheets, Multilayered Films, Capsules, Self-assembly

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Article Details

VOLUME: 3
ISSUE: 2
Year: 2007
Page: [155 - 160]
Pages: 6
DOI: 10.2174/157341307780619297
Price: $58