SERS spectra. (a) SERS spectrum of 10−6 M CuTMpyP4 adsorbed on the top side of porous copper membrane. (b, c) Raman spectra of 10−6 M CuTMpyP4 deposited from water and solution on bottom side of Cu membrane and porous silicon substrate, respectively. Laser plasma bands are marked by asterisks. Excitation wavelength was 441.6 nm.
Bandarenka et al. Nanoscale Research Letters 2012 7:477 doi:10.1186/1556-276X-7-477