Photoluminescence and Raman spectra of the DNA-functionalized SWCNTs before and after adding metal particles. PL spectra show substantial enhancement after adding (a) gold, (b) cobalt, and (c) nickel particles. Raman spectra do not show any change after adding (d) gold, (e) cobalt, and (f) nickel particles. Excitation laser wavelength was 532 nm for (a, c, d, and f) and 514 nm for (b and e). All the ‘after’ spectra were taken 180 min after adding metal particles.
Kim et al. Nanoscale Research Letters 2014 9:85 doi:10.1186/1556-276X-9-85