Monolithic hierarchical nanoporous gold disks, 500 nm in diameter, 75 nm in thickness and 3.5 nm in pore radius, have been fabricated by hybrid processes. A surface-enhanced Raman scattering enhancement factor of at least 108 has been obtained on individual disks using
The article was received on 18 Oct 2012, accepted on 20 Dec 2012 and first published on 03 Jan 2013
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