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Fabrication of Au/SnO2 Nanocomposites Based on 3D Structures of Butterfly Wing Scales and Research on Its SERS Effects

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Author(s): LIU Bo-Yang, ZHANG Wang, HE Zhao-Wen, ZHANG Di

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 27;
Issue: 9;
Start page: 917;
Date: 2012;
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Keywords: butterfly wing scale; 3D quasi-periodic structure; Au/SnO2; SERS

ABSTRACT
Scales from fore wings ofPapilio paris was used as templates, by ringing the original fore wings in the precursor and treatment by calcinations, SnO2 (rutile) which inherited the 3D quasi-periodic structures of original wing scale was fabricated. After that, Au nanoparticles were incorporated in the system of as-prepared SnO2 to form the Au/SnO2 nanocomposites. XRD, SEM and TEM were carried out to investigate the morphologies, structures and elemental composition. For measuring Surface-enhanced Raman Scattering (SERS) effects of the Au/SnO2 substrate, R6G was used as analyte molecules. By analyzing morphologies of this nanocomposites and UV-Vis DRS spectra of different substrates, mechanisms of SERS effects for this Au/SnO2 nanocomposites substrate were analyzed. The three-dimensional nanostructures of the substrate provide large quantities of Raman ‘hot spots’, meanwhile, the SnO2 and Au make synergetic contribution to the enhancement effects. The satisfying SERS properties combined with low synthesis costs show the prospective application possibilities of this novel SERS substrate.

Tango Jona
Tangokurs Rapperswil-Jona

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