We interrogate para-mercaptobenzoic acid (MBA) molecules chemisorbed onto plasmonic silver nanocubes through tip-enhanced Raman (TER) spectral nano-imaging. Through a detailed examination of the spectra, aided by correlation analysis and density functional theory calculations, we find that MBA chemisorbs onto the plasmonic particles with at least two distinct configurations: S- and CO2-bound. High spatial resolution TER mapping allows us to distinguish between the distinct adsorption geometries with a pixel-limited (
Published: July 2, 2021
Citation
Gabel M.L., B.T. O'Callahan, C.E. Groome, C. Wang, R. Ragan, Y. Gu, and P.Z. El-Khoury. 2021.Mapping Molecular Adsorption Configurations with The Journal of Physical Chemistry Letters 12, no. 14:3586-3590.PNNL-SA-160827.doi:10.1021/acs.jpclett.1c00661