Active molecular plasmonics: controlling plasmon resonances with molecular switches.
A gold nanodisk array, coated with bistable, redox-controllable [2]rotaxane molecules, when exposed to chemical oxidants and reductants, undergoes switching of its plasmonic properties reversibly. By contrast, (i) bare gold nanodisks and (ii) disks coated with a redox-active, but mechanically inert, control compound do not display surface-plasmon-based switching. Along with calculations based on time-dependent density functional theory, these experimental observations suggest that the nanoscale movements within surface-bound "molecular machines" can be used as the active components in plasmonic devices.
Zheng
Yue Bing
YB
Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Yang
Ying-Wei
YW
Jensen
Lasse
L
Fang
Lei
L
Juluri
Bala Krishna
BK
Flood
Amar H
AH
Weiss
Paul S
PS
Stoddart
J Fraser
JF
Huang
Tony Jun
TJ