All-State Switching of the Mie Resonance of Conductive Polyaniline Nanospheres.
Nano Lett
; 22(3): 1406-1414, 2022 02 09.
Article
em En
| MEDLINE
| ID: mdl-35084205
ABSTRACT
Polyaniline (PANI), a conductive polymer, is a promising active material for optical switching. In most studies, active switching has so far been realized only between two states, whereas PANI has a total of six states. The optical properties of nanoscale PANI in all six states have remained unclear. Herein we report on all-state switching of the Mie resonance on PANI nanospheres (NSs) and active plasmon switching on PANI-coated Au nanodisks (NDs). All-state switching of differently sized PANI NSs is achieved by proton doping/dedoping and electrochemical methods. Theoretical studies show that the scattering peaks of the individual PANI NSs originate from Mie resonances. All-state switching is further demonstrated on PANI-coated circular Au NDs, where an unprecedentedly large plasmon peak shift of â¼200 nm is realized. Our study not only provides a fundamental understanding of the optical properties of PANI but also opens the probability for developing high-performance dynamic media for active plasmonics.
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01-internacional
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MEDLINE
Assunto principal:
Nanosferas
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2022
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Article