Plasmon-Mediated Surface Engineering of Silver Nanowires for Surface-Enhanced Raman Scattering

We reveal nanoscale morphological changes on the surface of a silver nanowire (AgNW) in the conventional surface-enhanced Raman scattering (SERS) measurement condition. The surface morphology changes are due to the surface plasmon-mediated photochemical etching of silver in the presence of certain R...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2017-07, Vol.8 (13), p.2774-2779
Main Authors: Lu, Gang, Yuan, Haifeng, Su, Liang, Kenens, Bart, Fujita, Yasuhiko, Chamtouri, Maha, Pszona, Maria, Fron, Eduard, Waluk, Jacek, Hofkens, Johan, Uji-i, Hiroshi
Format: Article
Language:English
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Summary:We reveal nanoscale morphological changes on the surface of a silver nanowire (AgNW) in the conventional surface-enhanced Raman scattering (SERS) measurement condition. The surface morphology changes are due to the surface plasmon-mediated photochemical etching of silver in the presence of certain Raman probes, resulting in a dramatic increase of Raman scattering intensity. This observation indicates that the measured SERS enhancement does not always originate from the as-designed/fabricated structures themselves, but sometimes with contribution from the morphological changes by plasmon-mediated photochemical reactions. Our work provides a guideline for more reliable SERS measurements and demonstrates a novel method for simple and site-specific engineering of SERS substrate and AgNW probes for designing and fabricating new SERS systems, stable and efficient TERS mapping, and single-cell SERS endoscopy.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.7b00958