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O: Fachverband Oberflächenphysik

O 25: Plasmonics and nanooptics: Light-matter interaction, spectroscopy II

O 25.10: Vortrag

Dienstag, 13. März 2018, 12:45–13:00, MA 041

Chemical enhancement contribution in surface enhanced Raman scattering — •Bo Liu¹, Peter Lemmens^1,2, Rainer Stosch³, and Bernd Güttler³ — ¹IPKM, TU-BS, Braunschweig, Germany — ²LENA, TU-BS, Braunschweig, Germany — ³PTB, Braunschweig, Germany

In the fields of clinical chemistry, biotechnology, pharmacy, food industry and metrology, surface enhanced Raman scattering (SERS) is of enormous importance [1]. For a better insight into the complex light-matter interaction processes that lead to a signal enhancement, it is essential to experimentally distinguish and quantify the contributions from chemical (CMs) and electromagnetic mechanisms (EM) [2]. Here, we present an approach to estimate the relative CMs response of each Raman mode via analysing light induced degeneration of target molecules on designed metal/semiconductor SERS substrates [3]. Our work thereby provides a potential tool for understanding the CMs at the level of each mode. Work supported by DFG-RTG 1952/1 "NanoMet", Braunschweig-IGSM, and DFG-LE967/17-1. [1] Hampel, et al., Measurement Science and Technology (2017). [2] Kneipp, J. Phys. Chem. C 37, 21076 (2016). [3] Liu, et al., Nanotechnology 28, 195201 (2017).