Share Email Print
cover

Proceedings Paper

Molecular active plasmonics: controlling plasmon resonances with molecular machines
Author(s): Yue Bing Zheng; Ying-Wei Yang; Lasse Jensen; Lei Fang; Bala Krishna Juluri; Amar H. Flood; Paul S. Weiss; J. Fraser Stoddart; Tony Jun Huang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The paper studies the molecular-level active control of localized surface plasmon resonances (LSPRs) of Au nanodisk arrays with molecular machines. Two types of molecular machines - azobenzene and rotaxane - have been demonstrated to enable the reversible tuning of the LSPRs via the controlled mechanical movements. Azobenzene molecules have the property of trans-cis photoisomerization and enable the photo-induced nematic (N)-isotropic (I) phase transition of the liquid crystals (LCs) that contain the molecules as dopant. The phase transition of the azobenzene-doped LCs causes the refractive-index difference of the LCs, resulting in the reversible peak shift of the LSPRs of the embedded Au nanodisks due to the sensitivity of the LSPRs to the disks' surroundings' refractive index. Au nanodisk array, coated with rotaxanes, switches its LSPRs reversibly when it is exposed to chemical oxidants and reductants alternatively. The correlation between the peak shift of the LSPRs and the chemically driven mechanical movement of rotaxanes is supported by control experiments and a time-dependent density functional theory (TDDFT)-based, microscopic model.

Paper Details

Date Published: 2 September 2009
PDF: 10 pages
Proc. SPIE 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V, 73950W (2 September 2009); doi: 10.1117/12.824525
Show Author Affiliations
Yue Bing Zheng, The Pennsylvania State Univ. (United States)
Ying-Wei Yang, Northwestern Univ. (United States)
Lasse Jensen, The Pennsylvania State Univ. (United States)
Lei Fang, Northwestern Univ. (United States)
Bala Krishna Juluri, The Pennsylvania State Univ. (United States)
Amar H. Flood, Indiana Univ. (United States)
Paul S. Weiss, The Pennsylvania State Univ. (United States)
J. Fraser Stoddart, Northwestern Univ. (United States)
Tony Jun Huang, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 7395:
Plasmonics: Nanoimaging, Nanofabrication, and their Applications V
Satoshi Kawata; Vladimir M. Shalaev; Din Ping Tsai, Editor(s)

© SPIE. Terms of Use
Back to Top