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Issue 21, 2016
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Surface-enhanced hyper-Raman and Raman hyperspectral mapping

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Abstract

We investigate distributions of crystal violet and malachite green on plasmonic surfaces by principal component analysis (PCA) imaging of surface-enhanced hyper-Raman scattering (SEHRS) data. As a two-photon excited Raman scattering process, SEHRS provides chemical structure information based on molecular vibrations, but follows different selection rules than the normal, one-photon excited surface-enhanced Raman scattering (SERS). Therefore, simultaneous hyperspectral mapping using SEHRS excited at 1064 nm and SERS excited at 532 nm improves spatially resolved multivariate discrimination based on complementary vibrational information. The possibility to map distributions of the structurally similar dyes crystal violet and malachite green demonstrates the potential of this approach for multiplex imaging of complex systems.

Graphical abstract: Surface-enhanced hyper-Raman and Raman hyperspectral mapping

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Supplementary files

Article information


Submitted
09 Mar 2016
Accepted
04 May 2016
First published
04 May 2016

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 14228-14233
Article type
Paper
Author version available

Surface-enhanced hyper-Raman and Raman hyperspectral mapping

M. Gühlke, Z. Heiner and J. Kneipp, Phys. Chem. Chem. Phys., 2016, 18, 14228
DOI: 10.1039/C6CP01625A

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