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Probing the molecular orientation of a single conjugated polymer via nano-gap SERS

Marshall, Addison R L; Roberts, Matthew; Gierschner, Johannes; Bouillard, Jean-Sebastien G; Adawi, Ali M.

Authors

Addison R L Marshall

Matthew Roberts

Johannes Gierschner



Abstract

Determining the molecular orientation at the single molecule level is of key importance for a wide range of applica-tions ranging from molecular electronic devices to biomedical applications. In this work Surface-Enhanced Raman Scattering (SERS) was used to probe the light emitting conjugated polymer F8-PFB at the single molecule level using nanoparticle on an extended metallic film nano-gap. The directional field enhancement of the nano-gap combined with Density Functional Theory (DFT) calculations was used to determine the orientation of the molecule. This analysis revealed that the spin-coated conjugated polymer preferentially aligns its molecular chains parallel to the metallic substrate. The integration of this approach in nanofabrication and synthesis will have a profound impact on different fields ranging from molecular electronic devices to biomedical applications.

Journal Article Type Article
Publication Date May 10, 2019
Journal ACS Applied Polymer Materials
Electronic ISSN 2637-6105
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 1
Issue 5
Pages 1175-1180
APA6 Citation Marshall, A. R. L., Roberts, M., Gierschner, J., Bouillard, J. G., & Adawi, A. M. (2019). Probing the molecular orientation of a single conjugated polymer via nano-gap SERS. ACS applied polymer materials, 1(5), 1175-1180. https://doi.org/10.1021/acsapm.9b00180
DOI https://doi.org/10.1021/acsapm.9b00180
Publisher URL https://pubs.acs.org/doi/10.1021/acsapm.9b00180
Additional Information This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS applied polymer materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsapm.9b00180