title: Active molecular plasmonics: controlling plasmon resonances with molecular switches.
abstract: 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.
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Yue Bing
authors.initials: YB
authors.lastname: Zheng
authors.forename: Ying-Wei
authors.initials: YW
authors.lastname: Yang
authors.forename: Lasse
authors.initials: L
authors.lastname: Jensen
authors.forename: Lei
authors.initials: L
authors.lastname: Fang
authors.forename: Bala Krishna
authors.initials: BK
authors.lastname: Juluri
authors.forename: Amar H
authors.initials: AH
authors.lastname: Flood
authors.forename: Paul S
authors.initials: PS
authors.lastname: Weiss
authors.forename: J Fraser
authors.initials: JF
authors.lastname: Stoddart
authors.forename: Tony Jun
authors.initials: TJ
authors.lastname: Huang