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Core-Gap-Shell Nanoparticles@Polyaniline with TunablePlasmonic Chiroptical Activities by pH and Electric Potential Dual Modulation

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Title: Core-Gap-Shell Nanoparticles@Polyaniline with TunablePlasmonic Chiroptical Activities by pH and Electric Potential Dual Modulation
Authors: Lin, Han Browse this author
Mitomo, Hideyuki Browse this author →KAKEN DB
Yonamine, Yusuke Browse this author →KAKEN DB
Guo, Zhiyong Browse this author
Ijiro, Kuniharu Browse this author →KAKEN DB
Issue Date: 10-May-2022
Publisher: American Chemical Society
Journal Title: Chemistry of materials
Volume: 34
Issue: 9
Start Page: 4062
End Page: 4072
Publisher DOI: 10.1021/acs.chemmater.2c00313
Abstract: The emerging concept of tunable plasmonicchirality is mostly observed as a reconfigurable behavior or afeature of complex chiral plasmonic assemblies. For discretecolloidal particles, it is challenging to achieve reversible tunabilityor a transient response with regard to chiroptical activities,particularly in the visible or near-infrared region. Herein, wedemonstrate a stimulus-responsive system based on chiralmolecule-achiral plasmonic nanoparticles coated with polyaniline(PANI) as a variable dielectric layer, in whichL-/D-cysteinemolecules are introduced between the gold core and the shell as astatic chiral source, allowing the chiral transfer effect to be greatlyamplified by the hotspot gap of sub-monomolecular thickness. By taking advantage of the responsive properties to either pH or theelectric potential dual stimuli of PANI, which also provides a stable and real-time switchable dielectric environment for the wholesystem, dynamic tuning of the plasmon and its induced chiroptical activities of core-gap-shell nanoparticles@PANI were preciselyobtained. This well-defined design provides an open platform forflexible and rational tailoring of plasmonic cores, chiral molecules,and variable dielectrics to chiroptical needs, which is important for realizing applications in chemical sensing, chiral nanocatalysis,enantioselective separations, and novel optical devices
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三友 秀之

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