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Jedrych A, Pawlak M, Gorecka E, Lewandowski W, Wojcik MM. Light-Responsive Supramolecular Nanotubes-Based Chiral Plasmonic Assemblies. ACS NANO 2023; 17:5548-5560. [PMID: 36897199 PMCID: PMC10062029 DOI: 10.1021/acsnano.2c10955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
We describe the fabrication of dual-responsive (thermo/light) chiral plasmonic films. The idea is based on using photoswitchable achiral liquid crystal (LCs) forming chiral nanotubes for templating helical assemblies of Au NPs. Circular dichroism spectroscopy (CD) confirms chiroptical properties coming from the arrangement of organic and inorganic components, with up to 0.2 dissymmetry factor (g-factor). Upon exposure to UV light, organic molecules isomerize, resulting in controlled melting of organic nanotubes and/or inorganic nanohelices. The process can be reversed using visible light and further modified by varying the temperature, offering a control of chiroptical response of the composite material. These properties can play a key role in the future development of chiral plasmonics, metamaterials, and optoelectronic devices.
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Parzyszek S, Tessarolo J, Pedrazo-Tardajos A, Ortuño AM, Bagiński M, Bals S, Clever GH, Lewandowski W. Tunable Circularly Polarized Luminescence via Chirality Induction and Energy Transfer from Organic Films to Semiconductor Nanocrystals. ACS NANO 2022; 16:18472-18482. [PMID: 36342742 PMCID: PMC9706675 DOI: 10.1021/acsnano.2c06623] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/28/2022] [Indexed: 06/03/2023]
Abstract
Circularly polarized luminescent (CPL) films with high dissymmetry factors hold great potential for optoelectronic applications. Herein, we propose a strategy for achieving strongly dissymetric CPL in nanocomposite films based on chirality induction and energy transfer to semiconductor nanocrystals. First, focusing on a purely organic system, aggregation-induced emission (AIE) and CPL activity of organic liquid crystals (LCs) forming helical nanofilaments was detected, featuring green emission with high dissymmetry factors glum ∼ 10-2. The handedness of helical filaments, and thus the sign of CPL, was controlled via minute amounts of a small chiral organic dopant. Second, nanocomposite films were fabricated by incorporating InP/ZnS semiconductor quantum dots (QDs) into the LC matrix, which induced the chiral assembly of QDs and endowed them with chiroptical properties. Due to the spectral matching of the components, energy transfer (ET) from LC to QDs was possible enabling a convenient way of tuning CPL wavelengths by varying the LC/QD ratio. As obtained, composite films exhibited absolute glum values up to ∼10-2 and thermally on/off switchable luminescence. Overall, we demonstrate the induction of chiroptical properties by the assembly of nonchiral building QDs on the chiral organic template and energy transfer from organic films to QDs, representing a simple and versatile approach to tune the CPL activity of organic materials.
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Affiliation(s)
- Sylwia Parzyszek
- Faculty
of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Jacopo Tessarolo
- Faculty
of Chemistry and Chemical Biology, TU Dortmund
University, Otto-Hahn Straße 6, 44227 Dortmund, Germany
| | - Adrián Pedrazo-Tardajos
- Electron
Microscopy for Materials Research, University
of Antwerp, Groenenborgerlaan, 171, 2020 Antwerp, Belgium
- NANOlab
Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Ana M. Ortuño
- Faculty
of Chemistry and Chemical Biology, TU Dortmund
University, Otto-Hahn Straße 6, 44227 Dortmund, Germany
| | - Maciej Bagiński
- Faculty
of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Sara Bals
- Electron
Microscopy for Materials Research, University
of Antwerp, Groenenborgerlaan, 171, 2020 Antwerp, Belgium
- NANOlab
Center of Excellence, University of Antwerp, 2020 Antwerp, Belgium
| | - Guido H. Clever
- Faculty
of Chemistry and Chemical Biology, TU Dortmund
University, Otto-Hahn Straße 6, 44227 Dortmund, Germany
| | - Wiktor Lewandowski
- Faculty
of Chemistry, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
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