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Determining molecular orientation via single molecule SERS in a plasmonic nano-gap

Marshall, Addison R. L.; Stokes, Jamie; Viscomi, Francesco N.; Proctor, John E.; Gierschner, Johannes; Bouillard, Jean-Sebastien G.; Adawi, Ali M.


Addison R. L. Marshall

Jamie Stokes

Francesco N. Viscomi

John E. Proctor

Johannes Gierschner


In this work, plasmonic nano-gaps consisting of a silver nanoparticle coupled to an extended silver film have been fully optimized for single molecule Surface-Enhanced Raman Scattering (SERS) spectroscopy. The SERS signal was found to be strongly dependent on the particle size and the molecule orientation with respect to the field inside the nano-gap. Using Finite Difference Time Domain (FDTD) simulations to complement the experimental measurements, the complex interplay between the excitation enhancement and the emission enhancement of the system as a function of particle size were highlighted. Additionally in conjunction with Density Functional Theory (DFT), the well defined field direction in the nano-gap enables to recover the orientation of individual molecules.


Marshall, A. R. L., Stokes, J., Viscomi, F. N., Proctor, J. E., Gierschner, J., Bouillard, J. G., & Adawi, A. M. (2017). Determining molecular orientation via single molecule SERS in a plasmonic nano-gap. Nanoscale, 9(44), 17415-17421.

Journal Article Type Article
Acceptance Date Oct 2, 2017
Online Publication Date Oct 4, 2017
Publication Date Nov 28, 2017
Deposit Date Oct 3, 2017
Publicly Available Date Oct 4, 2018
Journal Nanoscale
Print ISSN 2040-3364
Electronic ISSN 2040-3372
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 9
Issue 44
Pages 17415-17421
Keywords Plasmonics, Nanoparticle, Silver, Nano-gap, SERS
Public URL
Publisher URL!divAbstract
Additional Information : This document is Similarity Check deposited; : Supplementary Information; : John E. Proctor (ORCID); : Johannes Gierschner (ORCID); : Johannes Gierschner (ResearcherID); : Ali M. Adawi (ORCID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; : Single-blind; : Received 13 July 2017; Accepted 2 October 2017; Accepted Manuscript published 4 October 2017; Advance Article published 6 November 2017; Version of Record published 16 November 2017


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