Inner Filter Effect on Surface Enhanced Raman Spectroscopic Measurement

    Authors

    F. S. Ameer; S. M. Ansar; W. F. Hu; S. L. Zou;D. M. Zhang

    Comments

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    Abbreviated Journal Title

    Anal. Chem.

    Keywords

    GOLD NANOPARTICLE; SCATTERING SERS; HOT-SPOTS; SILVER; FLUORESCENCE; MOLECULE; CLUSTERS; DIMERS; FILM; Chemistry, Analytical

    Abstract

    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.

    Journal Title

    Analytical Chemistry

    Volume

    84

    Issue/Number

    20

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    8437

    Last Page

    8441

    WOS Identifier

    WOS:000309805200002

    ISSN

    0003-2700

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