Nano Archive

Carbon Assisted Electroless Gold for Surface Enhanced Raman Scattering Studies

KULKARNI, G. U. and BHUVANA, T and Pavan Kumar, G. V. and Chandrabhas, Narayana (2007) Carbon Assisted Electroless Gold for Surface Enhanced Raman Scattering Studies. J. Phys. Chem. C, 111 . pp. 6700-6705.

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Abstract

Along with the ability to form desired architectures at the nanoscale, maximizing the enhancement factor of a Raman signal is of primary importance in a rational design of a surface enhanced Raman scattering (SERS) substrate. Here, we report how a layer of carbon on Si(100) substrate can assist and tune the formation of nanogranular gold in an electroless deposition process. It is demonstrated that Au deposited on an optimized thickness of carbon layer (90 nm) leads to a maximum enhancement factor of 107 with thiophenol as the probe molecule. Having characterized the substrates with AFM, XPS, and optical profilometry, their performance in SERS was tested using rhodamine 6G, hemoglobin, myoglobin, adenosine triphosphate, and adenine. In addition, the substrates are shown to be stable in the temperature range 123-433 K.

Item Type:Article
Subjects:Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:1610
Deposited By:JNCASR
Deposited On:17 Dec 2008 05:13
Last Modified:19 Feb 2009 09:13

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