Inner Filter Effect on Surface Enhanced Raman Spectroscopic Measurement
Abbreviated Journal Title
GOLD NANOPARTICLE; SCATTERING SERS; HOT-SPOTS; SILVER; FLUORESCENCE; MOLECULE; CLUSTERS; DIMERS; FILM; Chemistry, Analytical
Presented herein is a combined experimental and computational study of the gold nanopartide (AuNP) inner filter effect on surface enhanced Raman spectroscopic (SERS) measurements. Using a bianalyte strategy in which dithiopurine (DTP) and ethanol were employed as the model analytes, we demonstrated that AuNPs enhance DTP's Raman signal but attenuate ethanol's Raman intensity. Combined time-resolved UV-vis and Raman measurements showed that AuNP aggregation has significant and an exactly opposite impact on the AuNP inner filter effect and SERS enhancement. This research provides critical new insights regarding SEAS signal variation and offers a simple methodology for reliable determination of the SERS enhancement factors.
"Inner Filter Effect on Surface Enhanced Raman Spectroscopic Measurement" (2012). Faculty Bibliography 2010s. 2223.