Self-assembled multilayers of gold nanoparticles as versatile platforms for molecular sensing by Fourier transform-surface enhanced scattering (FT-SERS) and surface enhanced infrared absorption (SEIRA)

A wet-chemistry strategy for fabricating multilayers of gold nanoparticles on solid substrates is proposed. The strategy is based on immobilization of discrete gold colloid arrays on aminosilane-functionalized substrate with subsequent immersion of the substrate in gold colloidal and p-aminothiophen...

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Published inJournal of Optoelectronics and Advanced Materials Vol. 9; no. 3; pp. 625 - 628
Main Authors Toderas, F, Boca, S, Baia, M, Baia, L, Maniu, D, Astilean, S, Simon, S
Format Journal Article
LanguageEnglish
Published 01.03.2007
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Summary:A wet-chemistry strategy for fabricating multilayers of gold nanoparticles on solid substrates is proposed. The strategy is based on immobilization of discrete gold colloid arrays on aminosilane-functionalized substrate with subsequent immersion of the substrate in gold colloidal and p-aminothiophenol solutions. The formation of multilayers structures was confirmed by AFM images and uv-vis absorption spectroscopy. Both FT-SERS and SEIRA (in ATR mode) spectra of p-aminothiophenol absorbed onto as prepared gold films were successfully recorded. The result offers a valuable approach for chemical trace analysis and bio-sensing.
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ISSN:1454-4164