Theoretical investigation on SERS of pyridine adsorbed on C _n clusters induced by charge transfer: A hint that SERS could be applied on many materials

摘要

The SERS spectra of pyridine-C _n (n=1-6) complexes are investigated theoretically. The obtained enhancement factors of about 10 ~2-10 ~3 in the pre-resonance Raman spectrum calculations are attributed to charge-transfer transitions from the carbon clusters to pyridine, where a good match of band structures between substrates and probe molecules is essential. The SERS spectra of pyridine-C ~n (n=1-6) complexes (see picture for n=6) are investigated theoretically. The obtained enhancement factors in the pre-resonance Raman spectrum calculations are attributed to charge-transfer transitions from the carbon clusters to pyridine, where a good match of band structures between substrates and probe molecules is essential.