TY  - JOUR
AU  - Guo, Chenyang
AU  - Chen, Xing
AU  - Ding, Song-Yuan
AU  - Mayer, Dirk
AU  - Wang, Qingling
AU  - Zhao, Zhikai
AU  - Ni, Lifa
AU  - Liu, Haitao
AU  - Lee, Takhee
AU  - Xu, Bingqian
AU  - Xiang, Dong
TI  - Molecular Orbital Gating Surface-Enhanced Raman Scattering
JO  - ACS nano
VL  - 12
IS  - 11
SN  - 1936-086X
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2018-07423
SP  - 11229 - 11235
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:30335940
UR  - <Go to ISI:>//WOS:000451789200062
DO  - DOI:10.1021/acsnano.8b05826
UR  - https://juser.fz-juelich.de/record/858553
ER  -