Reconfigurable chiroptical nanocomposites with chirality transfer from the macro- to the nanoscale
- Authors
- Kim, Yoonseob; Yeom, Bongjun; Arteaga, Oriol; Yoo, Seung Jo; Lee, Sang-Gil; Kim, Jin-Gyu; Kotov, Nicholas A.
- Issue Date
- Apr-2016
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE MATERIALS, v.15, no.4, pp.461 - 468
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE MATERIALS
- Volume
- 15
- Number
- 4
- Start Page
- 461
- End Page
- 468
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/23172
- DOI
- 10.1038/NMAT4525
- ISSN
- 1476-1122
- Abstract
- Nanostructures with chiral geometries exhibit strong polarization rotation. However, achieving reversible modulation of chirality and polarization rotation in device-friendly solid-state films is difficult for rigid materials. Here, we describe nanocomposites, made by conformally coating twisted elastic substrates with films assembled layer-by-layer from plasmonic nanocolloids, whose nanoscale geometry and rotatory optical activity can be reversibly reconfigured and cyclically modulated by macroscale stretching, with up to tenfold concomitant increases in ellipticity. We show that the chiroptical activity at 660nm of gold nanoparticle composites is associated with circular extinction from linear effects. The polarization rotation at 550nm originates from the chirality of nanoparticle chains with an S-like shape that exhibit a non-planar buckled geometry, with the handedness of the substrate's macroscale twist determining the handedness of the S-like chains. Chiroptical effects at the nexus of mechanics, excitonics and plasmonics open new operational principles for optical and optoelectronic devices from nanoparticles, carbon nanotubes and other nanoscale components.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 화학공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/23172)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.