Journal Article

FZJ-2018-07423

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Molecular Orbital Gating Surface-Enhanced Raman Scattering

Guo, C. ; Chen, X. ; Ding, S.-Y. ; Mayer, D.FZJ* ; Wang, Q. ; Zhao, Z. ; Ni, L. ; Liu, H. ; Lee, T. ; Xu, B. ; Xiang, D. (Corresponding author)

2018
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsnano.8b05826

Abstract: One of the promising approaches to meet the urgent demand for further device miniaturization is to create functional devices using single molecules. Although various single-molecule electronic devices have been demonstrated recently, single-molecule optical devices which use external stimulations to control the optical response of a single molecule have rarely been reported. Here, we propose and demonstrate a field-effect Raman scattering (FERS) device with a single molecule, an optical counterpart to field-effect transistors (a key component of modern electronics). With our devices, the gap size between electrodes can be precisely adjusted at subangstrom accuracy to form single molecular junctions as well as to reach the maximum performance of Raman scattering via plasmonic enhancement. Based on this maximum performance, we demonstrated that the intensity of Raman scattering can be further enhanced by an additional ∼40% if the orbitals of the molecules bridged two electrodes were shifted by a gating voltage. This finding not only provides a method to increase the sensitivity of Raman scattering beyond the limit of plasmonic enhancement, but also makes it feasible to realize addressable functional FERS devices with a gate electrode array.

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Contributing Institute(s):

1. Bioelektronik (ICS-8)
2. JARA-FIT (JARA-FIT)

Research Program(s):

1. 523 - Controlling Configuration-Based Phenomena (POF3-523) (POF3-523)

Appears in the scientific report 2018

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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