论文信息 - Probing molecules by surface-enhanced Raman spectroscopy

Probing molecules by surface-enhanced Raman spectroscopy

A new class of Surface-Enhanced Raman Scattering (SERS) substrates have been engineered by exploiting both Photonic Crystal (PC) and semiconductor technologies. Gold coated inverted pyramids nanotextured substrates allow reproducibility <10% and enhancement factors > 106 over large areas. Modelling and optical characterization of the engineered structures is demonstrated. Examples of applications to amino acids and illicit drug detection are given. Concentrations as low as ppm-ppb (mg/mL to ng/mL) have been measured depending on the adsorbed analytes. Information on structure and conformation of the molecule is inferred due to the richer nature of SERS spectra.

[1] Robin L. Garrell,et al. Surface-Enhanced Raman Spectroscopy of Aromatic Thiols and Disulfides on Gold Electrodes , 1998 .

[2] Kitson,et al. Physical origin of photonic energy gaps in the propagation of surface plasmons on gratings. , 1996, Physical review. B, Condensed matter.

[3] J. Baumberg,et al. Plasmonic band gaps and trapped plasmons on nanostructured metal surfaces. , 2005, Physical review letters.

[4] M. Shikida,et al. Roughening of single-crystal silicon surface etched by KOH water solution , 1999 .

[5] W. Barnes,et al. Surface plasmon subwavelength optics , 2003, Nature.

[6] Jeremy J Baumberg,et al. Angle-resolved surface-enhanced Raman scattering on metallic nanostructured plasmonic crystals. , 2005, Nano letters.

[7] M. C. Netti,et al. Confined plasmons in metallic nanocavities. , 2001, Physical review letters.