Marshall, ARL, Stokes, J, Viscomi, FN, Proctor, JE, Gierschner, J, Bouillard, J-SG and Adawi, AM 2017, 'Determining molecular orientation via single molecule SERS in a plasmonic nano-gap' , Nanoscale, 9 (44) , pp. 17415-17421.
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Abstract
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.
| Item Type: | Article |
|---|---|
| Schools: | Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre |
| Journal or Publication Title: | Nanoscale |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2040-3364 |
| Related URLs: | |
| Depositing User: | JE Proctor |
| Date Deposited: | 21 Nov 2017 14:28 |
| Last Modified: | 04 Oct 2018 05:22 |
| URI: | http://usir.salford.ac.uk/id/eprint/44389 |
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