Liquid cell with plasmon lenses for surface enhanced raman spectroscopy.
High-fidelity surface enhanced Raman spectra (SERS) of Rhodamine 6G and 2-mercaptopyrimidine liquid solutions are measured using a microfluidic delivery system constructed on a flat silver substrate. Microscopic plasmon lenses patterned in the silver film focus surface plasmons into a subwavelength spot which yields the light amplification required for SERS. The system provides an efficiency similar to traditional colloidal substrates, and allows multiple sample loading. We find that the main contribution to the spectra comes from the molecules directly attached to the silver surface, which gives strong evidence for the chemical enhancement of SERS.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 982690
- Report Number(s):
- ANL/MSD/JA-66789
- Journal Information:
- Appl. Phys. Lett., Journal Name: Appl. Phys. Lett. Journal Issue: May 17, 2010 Vol. 96; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- ENGLISH
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