Gold/silver coated nanoporous ceramic membranes: a new substrate for SERS studies

A. Kassu; P. Robinson; A. Sharma; P. B. Ruffin; C. Brantley; E. Edwards

doi:10.1117/12.859886

27 August 2010 Gold/silver coated nanoporous ceramic membranes: a new substrate for SERS studies

A. Kassu, P. Robinson, A. Sharma, P. B. Ruffin, C. Brantley, E. Edwards

Proceedings Volume 7764, Nanoengineering: Fabrication, Properties, Optics, and Devices VII; 77640M (2010) https://doi.org/10.1117/12.859886
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

Surface Enhanced Raman Scattering (SERS) is a recently discovered powerful technique which has demonstrated sensitivity and selectivity for detecting single molecules of certain chemical species. This is due to an enhancement of Raman scattered light by factors as large as 10¹⁵. Gold and Silver-coated substrates fabricated by electron-beam lithography on Silicon are widely used in SERS technique. In this paper, we report the use of nanoporous ceramic membranes for SERS studies. Nanoporous membranes are widely used as a separation membrane in medical devices, fuel cells and other studies. Three different pore diameter sizes of commercially available nanoporous ceramic membranes: 35 nm, 55nm and 80nm are used in the study. To make the membranes SERS active, they are coated with gold/silver using sputtering techniques. We have seen that the membranes coated with gold layer remain unaffected even when immersed in water for several days. The results show that gold coated nanoporous membranes have sensitivity comparable to substrates fabricated by electron-beam lithography on Silicon substrates.

Citation Download Citation

A. Kassu, P. Robinson, A. Sharma, P. B. Ruffin, C. Brantley, and E. Edwards "Gold/silver coated nanoporous ceramic membranes: a new substrate for SERS studies", Proc. SPIE 7764, Nanoengineering: Fabrication, Properties, Optics, and Devices VII, 77640M (27 August 2010); https://doi.org/10.1117/12.859886

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