1
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Tan Y, Lu X, Ding T. Trace-Amount Detection of Chiral Molecules Based on Plasmonic Racemic Arrays Fabricated via Direct Laser Writing. ACS Sens 2024; 9:3290-3295. [PMID: 38832719 DOI: 10.1021/acssensors.4c00644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Superchiral fields, supported by chiral plasmonic structures, have shown outstanding performance for chiral molecule sensing via enhanced chiral light-matter interaction. However, this sensing capability cannot fully reveal the chiral origin of the molecules as the chiroptic response of the molecules is intertwined with the chiroptic response of the chiral plasmonic nanostructures, which can potentially be excluded by using a plasmonic racemic mixture. Such a plasmonic racemic mixture is not easily attainable, as it normally requires complex fabrication and expensive instrumentation, whose structural fineness is limited by the fabrication precision. Here, we demonstrate trace-amount chiral molecule detection with plasmonic racemic arrays fabricated by direct laser writing with vector beams, which is facile, cost-effective, and highly controllable. The racemic arrays present no inherent circular differential scattering but a large local superchiral field, which reflects the intrinsic chiral features of the chiral molecules. They are further applied to discriminate enantiomers of phenylalanine with a limit of detection (LOD) of 10.0 ± 2.8 μM, which is an order of magnitude smaller than the LOD of conventional circular dichroism spectroscopy. The strong local superchiral field provided by the plasmonic racemic arrays enlightens the design of a superior sensing platform, which holds promising applications for biomedical detection and enantioselective drug development.
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Affiliation(s)
- Yong Tan
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Xiaolin Lu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Tao Ding
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
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2
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Li S, Xu X, Xu L, Lin H, Kuang H, Xu C. Emerging trends in chiral inorganic nanomaterials for enantioselective catalysis. Nat Commun 2024; 15:3506. [PMID: 38664409 PMCID: PMC11045795 DOI: 10.1038/s41467-024-47657-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 04/01/2024] [Indexed: 04/28/2024] Open
Abstract
Asymmetric transformations and synthesis have garnered considerable interest in recent decades due to the extensive need for chiral organic compounds in biomedical, agrochemical, chemical, and food industries. The field of chiral inorganic catalysts, garnering considerable interest for its contributions to asymmetric organic transformations, has witnessed remarkable advancements and emerged as a highly innovative research area. Here, we review the latest developments in this dynamic and emerging field to comprehensively understand the advances in chiral inorganic nanocatalysts and stimulate further progress in asymmetric catalysis.
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Affiliation(s)
- Si Li
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Xinxin Xu
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu, 214122, People's Republic of China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China.
| | - Liguang Xu
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu, 214122, People's Republic of China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China.
| | - Hengwei Lin
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Hua Kuang
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu, 214122, People's Republic of China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Chuanlai Xu
- International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, Jiangsu, 214122, People's Republic of China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China.
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3
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Liang X, Liang K, Deng X, He C, Zhou P, Li J, Qin J, Jin L, Yu L. The Mechanism of Manipulating Chirality and Chiral Sensing Based on Chiral Plexcitons in a Strong-Coupling Regime. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:705. [PMID: 38668199 PMCID: PMC11053506 DOI: 10.3390/nano14080705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024]
Abstract
Manipulating plasmonic chirality has shown promising applications in nanophotonics, stereochemistry, chirality sensing, and biomedicine. However, to reconfigure plasmonic chirality, the strategy of constructing chiral plasmonic systems with a tunable morphology is cumbersome and complicated to apply for integrated devices. Here, we present a simple and effective method that can also manipulate chirality and control chiral light-matter interactions only via strong coupling between chiral plasmonic nanoparticles and excitons. This paper presents a chiral plexcitonic system consisting of L-shaped nanorod dimers and achiral molecule excitons. The circular dichroism (CD) spectra in our strong-coupling system can be calculated by finite element method simulations. We found that the formation of the chiral plexcitons can significantly modulate the CD spectra, including the appearance of new hybridized peaks, double Rabi splitting, and bisignate anti-crossing behaviors. This phenomenon can be explained by our extended coupled-mode theory. Moreover, we explored the applications of this method in enantiomer ratio sensing by using the properties of the CD spectra. We found a strong linear dependence of the CD spectra on the enantiomer ratio. Our work provides a facile and efficient method to modulate the chirality of nanosystems, deepens our understanding of chiral plexcitons in nanosystems, and facilitates the development of chiral devices and chiral sensing.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Li Yu
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.L.); (K.L.); (X.D.); (C.H.); (P.Z.); (J.L.); (J.Q.); (L.J.)
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4
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Biswas A, Cencillo-Abad P, Shabbir MW, Karmakar M, Chanda D. Tunable plasmonic superchiral light for ultrasensitive detection of chiral molecules. SCIENCE ADVANCES 2024; 10:eadk2560. [PMID: 38394206 PMCID: PMC10889367 DOI: 10.1126/sciadv.adk2560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 01/22/2024] [Indexed: 02/25/2024]
Abstract
The accurate detection, classification, and separation of chiral molecules are pivotal for advancing pharmaceutical and biomolecular innovations. Engineered chiral light presents a promising avenue to enhance the interaction between light and matter, offering a noninvasive, high-resolution, and cost-effective method for distinguishing enantiomers. Here, we present a nanostructured platform for surface-enhanced infrared absorption-induced vibrational circular dichroism (VCD) based on an achiral plasmonic system. This platform enables precise measurement, differentiation, and quantification of enantiomeric mixtures, including concentration and enantiomeric excess determination. Our experimental results exhibit a 13 orders of magnitude higher detection sensitivity for chiral enantiomers compared to conventional VCD spectroscopic techniques, accounting for respective path lengths and concentrations. The tunable spectral characteristics of this achiral plasmonic system facilitate the detection of a diverse range of chiral compounds. The platform's simplicity, tunability, and exceptional sensitivity holds remarkable potential for enantiomer classification in drug design, pharmaceuticals, and biological applications.
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Affiliation(s)
- Aritra Biswas
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA
- CREOL, The College of Optics and Photonics, University of Central Florida, 4304 Scorpius St., Orlando, FL 32816, USA
| | - Pablo Cencillo-Abad
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA
| | - Muhammad W Shabbir
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA
| | - Manobina Karmakar
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA
| | - Debashis Chanda
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, USA
- CREOL, The College of Optics and Photonics, University of Central Florida, 4304 Scorpius St., Orlando, FL 32816, USA
- Department of Physics, University of Central Florida, 4111 Libra Drive, Physical Sciences Bldg. 430, Orlando, FL 32816, USA
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5
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Liu W, Han H, Wang J. Recent Advances in the 3D Chiral Plasmonic Nanomaterials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305725. [PMID: 37828637 DOI: 10.1002/smll.202305725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 10/03/2023] [Indexed: 10/14/2023]
Abstract
From the view of geometry, chirality is that an object cannot overlap with its mirror image, which has been a fundamental scientific problem in biology and chemistry since the 19th century. Chiral inorganic nanomaterials serve as ideal templates for investigating chiral transfer and amplification mechanisms between molecule and bulk materials, garnering widespread attentions. The chiroptical property of chiral plasmonic nanomaterials is enhanced through localized surface plasmon resonance effects, which exhibits distinctive circular dichroism (CD) response across a wide wavelength range. Recently, 3D chiral plasmonic nanomaterials are becoming a focal research point due to their unique characteristics and planar-independence. This review provides an overview of recent progresses in 3D chiral plasmonic nanomaterials studies. It begins by discussing the mechanisms of plasmonic enhancement of molecular CD response, following by a detailed presentation of novel classifications of 3D chiral plasmonic nanomaterials. Finally, the applications of 3D chiral nanomaterials such as biology, sensing, chiral catalysis, photology, and other fields have been discussed and prospected. It is hoped that this review will contribute to the flourishing development of 3D chiral nanomaterials.
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Affiliation(s)
- Wenliang Liu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Han Han
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Jiqian Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China
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6
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Zhang C, Hu H, Ma C, Li Y, Wang X, Li D, Movsesyan A, Wang Z, Govorov A, Gan Q, Ding T. Quantum plasmonics pushes chiral sensing limit to single molecules: a paradigm for chiral biodetections. Nat Commun 2024; 15:2. [PMID: 38169462 PMCID: PMC10762144 DOI: 10.1038/s41467-023-42719-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 10/19/2023] [Indexed: 01/05/2024] Open
Abstract
Chiral sensing of single molecules is vital for the understanding of chirality and their applications in biomedicine. However, current technologies face severe limitations in achieving single-molecule sensitivity. Here we overcome these limitations by designing a tunable chiral supramolecular plasmonic system made of helical oligoamide sequences (OS) and nanoparticle-on-mirror (NPoM) resonator, which works across the classical and quantum regimes. Our design enhances the chiral sensitivity in the quantum tunnelling regime despite of the reduced local E-field, which is due to the strong Coulomb interactions between the chiral OSs and the achiral NPoMs and the additional enhancement from tunnelling electrons. A minimum of four molecules per single-Au particle can be detected, which allows for the detection of an enantiomeric excess within a monolayer, manifesting great potential for the chiral sensing of single molecules.
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Affiliation(s)
- Chi Zhang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, 430072, Wuhan, China
| | - Huatian Hu
- Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, 430205, Wuhan, China
- Center for Biomolecular Nanotechnologies, Istituto Italiano di Tecnologia, Via Barsanti 14, Arnesano, LE, 73010, Italy
| | - Chunmiao Ma
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Yawen Li
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, 430072, Wuhan, China
| | - Xujie Wang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, 430072, Wuhan, China
| | - Dongyao Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Artur Movsesyan
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, 610054, Chengdu, China
- Department of Physics and Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, 610054, Chengdu, China
| | - Alexander Govorov
- Department of Physics and Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Quan Gan
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China.
| | - Tao Ding
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, 430072, Wuhan, China.
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7
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Lipok M, Obstarczyk P, Żak A, Olesiak-Bańska J. Single Gold Nanobipyramids Sensing the Chirality of Amyloids. J Phys Chem Lett 2023; 14:11084-11091. [PMID: 38051220 DOI: 10.1021/acs.jpclett.3c02762] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Plasmonic nanoparticles, due to their sensitivity to small changes in their closest environment and plasmon resonance, can sense the chirality of the surrounding molecules. Therefore, plasmonic nanoparticles can be applied as a next-generation biosensor for peptides or proteins. In this work, we explore the interaction between chiral, ordered protein aggregates (amyloids) and small gold nanobipyramids. We show how the morphology, structure, and chiroptical properties of amyloids induce circular dichroism in the plasmon resonance wavelengths from individual plasmonic nanoparticles upon binding to the chiral amyloid template. Moreover, using the data from microscopic and spectroscopic analyses of formed heterostructures, we propose the most probable mechanism behind the induction of chirality in this system and discuss which specific feature of insulin protein aggregates is sensed by nanobipyramids.
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Affiliation(s)
- Maciej Lipok
- Institute of Advanced Materials, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Patryk Obstarczyk
- Institute of Advanced Materials, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Andrzej Żak
- Institute of Advanced Materials, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Joanna Olesiak-Bańska
- Institute of Advanced Materials, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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8
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Venturi M, Adhikary R, Sahoo A, Ferrante C, Daidone I, Di Stasio F, Toma A, Tani F, Altug H, Mecozzi A, Aschi M, Marini A. Plasmon-enhanced circular dichroism spectroscopy of chiral drug solutions. J Chem Phys 2023; 159:154703. [PMID: 37846957 DOI: 10.1063/5.0169826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/01/2023] [Indexed: 10/18/2023] Open
Abstract
We investigate the potential of surface plasmon polaritons at noble metal interfaces for surface-enhanced chiroptical sensing of dilute chiral drug solutions with nl volume. The high quality factor of surface plasmon resonances in both Otto and Kretschmann configurations enables the enhancement of circular dichroism differenatial absorption thanks to the large near-field intensity of such plasmonic excitations. Furthermore, the subwavelength confinement of surface plasmon polaritons is key to attain chiroptical sensitivity to small amounts of drug volumes placed around ≃100 nm by the metal surface. Our calculations focus on reparixin, a pharmaceutical molecule currently used in clinical studies for patients with community-acquired pneumonia, including COVID-19 and acute respiratory distress syndrome. Considering realistic dilute solutions of reparixin dissolved in water with concentration ≤5 mg/ml and nl volume, we find a circular-dichroism differential absorption enhancement factor of the order ≃20 and chirality-induced polarization distortion upon surface plasmon polariton excitation. Our results are relevant for the development of innovative chiroptical sensors capable of measuring the enantiomeric imbalance of chiral drug solutions with nl volume.
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Affiliation(s)
- Matteo Venturi
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | - Raju Adhikary
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | - Ambaresh Sahoo
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | - Carino Ferrante
- CNR-SPIN, c/o Dip.to di Scienze Fisiche e Chimiche, Via Vetoio, Coppito (L'Aquila) 67100, Italy
| | - Isabella Daidone
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | | | - Andrea Toma
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16136, Italy
| | - Francesco Tani
- Max Planck Institute for the Science of Light, Staudtstr. 2, 91058 Erlangen, Germany
| | - Hatice Altug
- Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne 1015, Switzerland
| | - Antonio Mecozzi
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | - Massimiliano Aschi
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
| | - Andrea Marini
- Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy
- CNR-SPIN, c/o Dip.to di Scienze Fisiche e Chimiche, Via Vetoio, Coppito (L'Aquila) 67100, Italy
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9
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Samanta D, Shaw M, Shaik MAS, Basu R, Mondal I, Bhattacharya A, Pathak A. Optical Asymmetry and Structural Complexity in Hierarchically Organized Chiral CuO Nanostructures: Insight into the Geometric and Crystallographic Effects on Cooperative Chirality. Inorg Chem 2023; 62:16725-16733. [PMID: 37768369 DOI: 10.1021/acs.inorgchem.3c01861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Optical asymmetry and structural complexity across different length scales were realized in flower-shaped CuO nanostructures, prepared through refluxing an aqueous solution of copper acetate, sodium hydroxide, and D-tartaric acid, as well as in their toroid-like forms obtained on calcination at 600 °C. Atomic scale chirality in the flower morphology could be visualized as putative Boerdijk-Coexter-Bernal like tetrahelical fragments, while that in the toroid form could be identified as screw dislocation-driven helicity. The fraction of asymmetry in the nanostructures has been evaluated from their chiroptical responses based on Kuhn asymmetry factor (g) from circular dichroism (CD) spectroscopy in the entire UV-vis range. The origin of chirality in the two CuO nanostructures has been assigned to the helical arrangement of the Cu-O-Cu network in accordance with their microscopic and spectroscopic observations. Attempts have been made to interpret the crystallographic and geometric chiralities in the two CuO nanostructures based on the redshift and augmented intensity of the CD signal along with an increase in their corresponding anisotropic factor on calcination. Further, the diverse interaction of the toroid-shaped CuO nanostructures with enantiomeric tryptophan moieties has been illustrated from the measurement of their corresponding thermodynamic parameters.
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Affiliation(s)
- Dipanjan Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Manisha Shaw
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Md Abdus Salam Shaik
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Rajarshi Basu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Imran Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Angana Bhattacharya
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
| | - Amita Pathak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, W.B. 721302, India
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10
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Jiao R, Wang Q, Liu J, Shu F, Pan G, Jing X, Hong Z. High-Q Quasi-Bound States in the Continuum in Terahertz All-Silicon Metasurfaces. MICROMACHINES 2023; 14:1817. [PMID: 37893254 PMCID: PMC10609513 DOI: 10.3390/mi14101817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/29/2023]
Abstract
Bound states in the continuum (BIC)-based all-silicon metasurfaces have attracted widespread attention in recent years because of their high quality (Q) factors in terahertz (THz) frequencies. Here, we propose and experimentally demonstrate an all-silicon BIC metasurface consisting of an air-hole array on a Si substrate. BICs originated from low-order TE and TM guided mode resonances (GMRs) induced by (1,0) and (1,1) Rayleigh diffraction of metagratings, which were numerically investigated. The results indicate that the GMRs and their Q-factors are easily excited and manipulated by breaking the lattice symmetry through changes in the position or radius of the air-holes, while the resonance frequencies are less sensitive to these changes. The measured Q-factor of the GMRs is as high as 490. The high-Q metasurfaces have potential applications in THz modulators, biosensors, and other photonic devices.
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Affiliation(s)
| | | | | | | | | | | | - Zhi Hong
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China; (R.J.); (Q.W.); (J.L.); (F.S.); (G.P.); (X.J.)
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11
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Lininger A, Palermo G, Guglielmelli A, Nicoletta G, Goel M, Hinczewski M, Strangi G. Chirality in Light-Matter Interaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2107325. [PMID: 35532188 DOI: 10.1002/adma.202107325] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 04/07/2022] [Indexed: 06/14/2023]
Abstract
The scientific effort to control the interaction between light and matter has grown exponentially in the last 2 decades. This growth has been aided by the development of scientific and technological tools enabling the manipulation of light at deeply sub-wavelength scales, unlocking a large variety of novel phenomena spanning traditionally distant research areas. Here, the role of chirality in light-matter interactions is reviewed by providing a broad overview of its properties, materials, and applications. A perspective on future developments is highlighted, including the growing role of machine learning in designing advanced chiroptical materials to enhance and control light-matter interactions across several scales.
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Affiliation(s)
- Andrew Lininger
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giovanna Palermo
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Alexa Guglielmelli
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Giuseppe Nicoletta
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Madhav Goel
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Michael Hinczewski
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giuseppe Strangi
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
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12
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Goerlitzer ESA, Zapata-Herrera M, Ponomareva E, Feller D, Garcia-Etxarri A, Karg M, Aizpurua J, Vogel N. Molecular-Induced Chirality Transfer to Plasmonic Lattice Modes. ACS PHOTONICS 2023; 10:1821-1831. [PMID: 37363627 PMCID: PMC10288536 DOI: 10.1021/acsphotonics.3c00174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Indexed: 06/28/2023]
Abstract
Molecular chirality plays fundamental roles in biology. The chiral response of a molecule occurs at a specific spectral position, determined by its molecular structure. This fingerprint can be transferred to other spectral regions via the interaction with localized surface plasmon resonances of gold nanoparticles. Here, we demonstrate that molecular chirality transfer occurs also for plasmonic lattice modes, providing a very effective and tunable means to control chirality. We use colloidal self-assembly to fabricate non-close packed, periodic arrays of achiral gold nanoparticles, which are embedded in a polymer film containing chiral molecules. In the presence of the chiral molecules, the surface lattice resonances (SLRs) become optically active, i.e., showing handedness-dependent excitation. Numerical simulations with varying lattice parameters show circular dichroism peaks shifting along with the spectral positions of the lattice modes, corroborating the chirality transfer to these collective modes. A semi-analytical model based on the coupling of single-molecular and plasmonic resonances rationalizes this chirality transfer.
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Affiliation(s)
- Eric Sidney Aaron Goerlitzer
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstraße 4, D-91058 Erlangen, Germany
| | - Mario Zapata-Herrera
- Materials
Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain
| | - Ekaterina Ponomareva
- Institut
für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, Düsseldorf D-40225 Germany
| | - Déborah Feller
- Institut
für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, Düsseldorf D-40225 Germany
| | - Aitzol Garcia-Etxarri
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque
Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain
| | - Matthias Karg
- Institut
für Physikalische Chemie I: Kolloide und Nanooptik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, Düsseldorf D-40225 Germany
| | - Javier Aizpurua
- Materials
Physics Center CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
| | - Nicolas Vogel
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstraße 4, D-91058 Erlangen, Germany
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13
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Lin X, Zhou Y, Pan X, Zhang Q, Hu N, Li H, Wang L, Xue Q, Zhang W, Ni W. Trace detection of chiral J-aggregated molecules adsorbed on single Au nanorods. NANOSCALE 2023. [PMID: 37314106 DOI: 10.1039/d3nr01147j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Trace detection of chiral molecules, which is of great significance in chemical, biological, medical and pharmaceutical sciences, requires microscopic techniques at the single-particle or single-molecule level. Although ensemble experiments show that the circular dichroism of chiral molecules can be amplified by plasmonic nanocrystals, trace detection of small chiral molecules remains challenging due to weak signals that are far below the detection limit. Herein, we demonstrate trace detection of chiral J-aggregated molecules adsorbed on individual Au nanorods (NRs) using single-particle circular differential scattering (CDS) spectroscopy. Through measuring the single-particle CDS spectra, we identified dip-peak bisignatures and further determined the chirality by matching them with calculations modelled with chiral media. We therefore find that plasmonic nanocrystals can dramatically amplify the circular dichroism of strongly coupled molecules to a detectable level so that the detection limit is as low as 3.9 × 103 molecules on an individual plasmonic nanoparticle, whereas 2.5 × 1012 molecules free in solution are barely detectable using a commercial circular dichroism instrument, suggesting a significant amplification factor of 108. Our method provides a promising strategy with a high amplification factor, shedding light on the trace detection of chiral molecules using optical microscopic methods.
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Affiliation(s)
- Xingyue Lin
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Yuhan Zhou
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Xinyang Pan
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Qin Zhang
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Ningneng Hu
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Hao Li
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Le Wang
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Qi Xue
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Wei Zhang
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Weihai Ni
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou, Jiangsu, 215006, China.
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14
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Yamane H, Yokoshi N, Ishihara H, Oka H. Enantioselective optical trapping of single chiral molecules in the superchiral field vicinity of metal nanostructures. OPTICS EXPRESS 2023; 31:13708-13723. [PMID: 37157253 DOI: 10.1364/oe.482207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, we theoretically analyzed the optical force acting on single chiral molecules in the plasmon field induced by metallic nanostructures. Using the extended discrete dipole approximation, we quantitatively examined the optical response of single chiral molecules in the localized plasmon by numerically analyzing the internal polarization structure of the molecules obtained from quantum chemical calculations, without phenomenological treatment. We evaluated the chiral gradient force due to the optical chirality gradient of the superchiral field near the metallic nanostructures for chiral molecules. Our calculation method can be used to evaluate the molecular-orientation dependence and rotational torque by considering the chiral spatial structure inside the molecules. We theoretically showed that the superchiral field induced by chiral plasmonic nanostructures can be used to selectively optically capture the enantiomers of a single chiral molecule.
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15
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Liu H, Vladár AE, Wang PP, Ouyang M. Tuning Geometric Chirality in Metallic and Hybrid Nanostructures by Controlled Nanoscale Crystal Symmetry Breaking. J Am Chem Soc 2023; 145:7495-7503. [PMID: 36952630 DOI: 10.1021/jacs.3c00503] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Understanding and controlling chirality in inorganic crystalline materials at the nanoscale is crucial in elucidating fundamental chirality-dependent physical and chemical processes as well as advancing new technological prospects, but significant challenges remain due to the lack of material control. Here, we have developed a facile and general bottom-up synthetic strategy for achieving chiral plasmonic Au nanostructures, including nanocubes and nanorods with fine chirality control. The underlying chiral mechanism enabled by the chiral boundary morphology is substantiated by theoretical modeling and finite element method (FEM) simulation. Because of the robustness of induced handedness and their small size, these as-synthesized chiral nanostructures can be further employed as building blocks toward the formation of complex chiral nanostructures. We have demonstrated a new class of chiral hybrid metal-semiconductor nanostructures that can allow integration of chirality with other properties and functionalities. All of these together have paved the way to engineer nanoscale inorganic chirality and thus study various emerging chirality-entangled effects with practical technological applications.
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Affiliation(s)
- Hanyu Liu
- Department of Physics and Quantum Materials Center, University of Maryland, College Park, Maryland 20742, United States
| | - András E Vladár
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Peng-Peng Wang
- Department of Physics and Quantum Materials Center, University of Maryland, College Park, Maryland 20742, United States
| | - Min Ouyang
- Department of Physics and Quantum Materials Center, University of Maryland, College Park, Maryland 20742, United States
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16
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Martens K, Funck T, Santiago EY, Govorov AO, Burger S, Liedl T. Onset of Chirality in Plasmonic Meta-Molecules and Dielectric Coupling. ACS NANO 2022; 16:16143-16149. [PMID: 36241172 PMCID: PMC9620978 DOI: 10.1021/acsnano.2c04729] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
Chirality is a fundamental feature in all domains of nature, ranging from particle physics over electromagnetism to chemistry and biology. Chiral objects lack a mirror plane and inversion symmetry and therefore cannot be spatially aligned with their mirrored counterpart, their enantiomer. Both natural molecules and artificial chiral nanostructures can be characterized by their light-matter interaction, which is reflected in circular dichroism (CD). Using DNA origami, we assemble model meta-molecules from multiple plasmonic nanoparticles, representing meta-atoms accurately positioned in space. This allows us to reconstruct piece by piece the impact of varying macromolecular geometries on their surrounding optical near fields. Next to the emergence of CD signatures in the instance that we architect a third dimension, we design and implement sign-flipping signals through addition or removal of single particles in the artificial molecules. Our data and theoretical modeling reveal the hitherto unrecognized phenomenon of chiral plasmonic-dielectric coupling, explaining the intricate electromagnetic interactions within hybrid DNA-based plasmonic nanostructures.
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Affiliation(s)
- Kevin Martens
- Faculty
of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany
| | - Timon Funck
- Faculty
of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany
| | - Eva Y. Santiago
- Department
of Physics and Astronomy, Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, Ohio 45701, United States
| | - Alexander O. Govorov
- Department
of Physics and Astronomy, Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, Ohio 45701, United States
| | - Sven Burger
- Zuse
Institute Berlin, Takustraße 7, D-14195 Berlin, Germany
- JCMwave
GmbH, Bolivarallee 22, 14050 Berlin, Germany
| | - Tim Liedl
- Faculty
of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany
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17
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Yuan Y, Li H, Yang H, Han C, Hu H, Govorov AO, Yan H, Lan X. Unraveling the Complex Chirality Evolution in DNA‐Assembled High‐Order, Hybrid Chiroplasmonic Superstructures from Multi‐Scale Chirality Mechanisms. Angew Chem Int Ed Engl 2022; 61:e202210730. [DOI: 10.1002/anie.202210730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Yongqing Yuan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
| | - Huacheng Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
| | - Hao Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
| | - Cong Han
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
| | - Huatian Hu
- Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology Wuhan Hubei 430205 China
| | - Alexander O. Govorov
- Department of Physics and Astronomy and the Nanoscale & Quantum Phenomena Institute Ohio University Athens OH 45701 USA
| | - Hao Yan
- Center for Molecular Design and Biomimetics The Biodesign Institute, School of Molecular Sciences Arizona State University Tempe AZ 85287 USA
| | - Xiang Lan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
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18
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Yuan Y, Li H, Yang H, Han C, Hu H, Govorov AO, Yan H, Lan X. Unraveling the Complex Chirality Evolution in DNA‐Assembled High‐Order, Hybrid Chiroplasmonic Superstructures from Multi‐Scale Chirality Mechanisms. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yongqing Yuan
- Donghua University - Songjiang Campus: Donghua University Center for Advanced Low-dimension Materials CHINA
| | - Huacheng Li
- Donghua University - Songjiang Campus: Donghua University Center for Advanced Low-dimension Materials CHINA
| | - Hao Yang
- Donghua University - Songjiang Campus: Donghua University Center for Advanced Low-dimension Materials CHINA
| | - Cong Han
- Donghua University - Songjiang Campus: Donghua University Center for Advanced Low-dimension Materials CHINA
| | - Huatian Hu
- Wuhan Institute of Technology Hubei Key Laboratory of Optical Information and Pattern Recognition CHINA
| | - Alexander O. Govorov
- Ohio University Department of Physics and Astronomy and the Nanoscale & Quantum Phenomena Institute UNITED STATES
| | - Hao Yan
- Arizona State University The Biodesign Institute UNITED STATES
| | - Xiang Lan
- Donghua University - Songjiang Campus: Donghua University Center for Advanced Low-Dimension Materials No.2999 North Renmin Str, Songjiang Dist 201620 Shanghai CHINA
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19
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Control of light, spin and charge with chiral metal halide semiconductors. Nat Rev Chem 2022; 6:470-485. [PMID: 37117313 DOI: 10.1038/s41570-022-00399-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2022] [Indexed: 11/08/2022]
Abstract
The relationship between the structural asymmetry and optoelectronic properties of functional materials is an active area of research. The movement of charges through an oriented chiral medium depends on the spin configuration of the charges, and such systems can be used to control spin populations without magnetic components - termed the chiral-induced spin selectivity (CISS) effect. CISS has mainly been studied in chiral organic molecules and their assemblies. Semiconductors are non-magnetic extended systems that allow for the control of charge transport, as well as the absorption and emission of light. Therefore, introducing chirality into semiconductors would enable control over charge, spin and light without magnetic components. Chiral metal halide semiconductors (MHSs) are hybrid organic-inorganic materials that combine the properties of small chiral organic molecules with those of extended inorganic semiconductors. Reports of CISS in chiral MHSs have resulted in breakthroughs in our understanding of CISS and in the realization of spin-dependent optoelectronic properties. This Review examines the fundamentals and applications of CISS in chiral MHSs. The structural diversity and key structure-property relationships, such as chiral transfer from the organic to the inorganic components, are summarized. With a focus on the underlying chemistry and physics, the control of spin, light and charge in these semiconductors is explored.
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20
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Bukharina D, Kim M, Han MJ, Tsukruk VV. Cellulose Nanocrystals' Assembly under Ionic Strength Variation: From High Orientation Ordering to a Random Orientation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6363-6375. [PMID: 35559606 DOI: 10.1021/acs.langmuir.2c00293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We discuss the effect of the ionic strength and effective charge density on the final structural organization of cellulose nanocrystals (CNCs) after drying suspensions with different ionic strengths in terms of quantitative characteristics of the orientation order, rarely considered to date. We observed that increasing the ionic strength in the initial suspension results in continuous shrinking of the helical pitch length that shifts the photonic band gap to a far UV region from the visible range (from 400 to 250 nm) because of the increase in the helical twisting power from 4 to 6 μm-1 and doubling of the twisting angle between neighboring monolayers from 5.5 to 9°. As our estimation of the Coulombic interactions demonstrates, the reduction of the Debye charge screening length below a critical value of 3 nm results in the loss of the long-range helicoidal order and the transition to a disordered morphology with random packing of nanocrystals. Subsequently, very high orientation ordering with the 2D orientation factor, S, within the range 0.8-0.9, close to the theoretical limit of 1, gradually decreased to a very low value of S = 0.1-0.2, a characteristic of random organization at high ionic strength. We suggest that the loss of the chiral ordering is a result of the reduction of repulsive forces, promoting direct physical contact with the reduced contact area during Brownian motion, combined with increased repulsive Coulombic interactions of nanocrystals at nonparallel local packing. Notably, electrolyte addition enhances chiral interactions to the point where the helical twisting power is too large and the resulting nanocrystal bundles can no longer compactly pack without creating unfavorably large free volume. We propose that the Debye charge screening length in suspensions can be used as a universal parameter for CNCs under different conditions and can be used to assess expected ordering characteristics in the solid films.
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Affiliation(s)
- Daria Bukharina
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Moon Jong Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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21
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Zhang M, Hao D, Wang S, Li R, Wang S, Ma Y, Moro R, Ma L. Chiral biosensing using terahertz twisted chiral metamaterial. OPTICS EXPRESS 2022; 30:14651-14660. [PMID: 35473204 DOI: 10.1364/oe.448735] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Subwavelength chiral metamaterials with tunable geometries and compositions are essential to advance the development of chiral biochemical samples detection. Here, we report a spatial symmetry breaking chiral terahertz (THz) metamaterial structure with stacked layers of L-shape arranged gold disks as the periodic unit cell. The chiroptical response can be adjusted on-demand by manipulating the number of stacking layers and the twisted angle of the periodic unit between adjacent array layers. We reveal that the chiroptical response originates from the optical resonances of the gold disks and the adjacent gold disks array layers via experiments and numerical simulation analysis. Furthermore, we find that this chiral metamaterial can realize label-free detection of proline in biological samples and label-free enantio-discrimination of chiral molecules. The change of the analyte concentration can also regulate the transmission circular dichroism (TCD) intensity of the chiral metamaterials. Our results not only provide new ideas into the design of functional chiral metamaterials, but also bring new strategies to develop chiroptical biosensing devices.
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22
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Chen Y, Chen W, Kong X, Wu D, Chu J, Qiu CW. Can Weak Chirality Induce Strong Coupling between Resonant States? PHYSICAL REVIEW LETTERS 2022; 128:146102. [PMID: 35476494 DOI: 10.1103/physrevlett.128.146102] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Strong coupling between resonant states is usually achieved by modulating intrinsic parameters of optical systems, e.g., the refractive index of constituent materials or structural geometries. Externally introduced chiral enantiomers may couple resonances, but the extremely weak chirality of natural enantiomers largely prevents the system from reaching strong coupling regimes. Whether weak chirality could induce strong coupling between resonant states remains an open question. Here, we realize strong coupling between quasibound states in the continuum of a high-Q metasurface, assisted with externally introduced enantiomers of weak chirality. We establish a chirality-involved Hamiltonian to quantitatively describe the correlation between the coupling strength and the chirality of such systems, which provides an insightful recipe for enhancing the coupling of resonant states further in the presence of quite weak chirality. Consequently, high-sensitivity chiral sensing is demonstrated, in which the circular dichroism signal is enhanced 3 orders higher than the case without strong coupling. Our findings present a distinct strategy for manipulating optical coupling between resonances, revealing opportunities in chiral sensing, topological photonics, and quantum optics.
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Affiliation(s)
- Yang Chen
- Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 230027 Hefei, China
- Department of Electrical and Computer Engineering, National University of Singapore, 117583 Singapore, Singapore
| | - Weijin Chen
- Department of Electrical and Computer Engineering, National University of Singapore, 117583 Singapore, Singapore
| | - Xianghong Kong
- Department of Electrical and Computer Engineering, National University of Singapore, 117583 Singapore, Singapore
| | - Dong Wu
- Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 230027 Hefei, China
| | - Jiaru Chu
- Chinese Academy of Sciences Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, 230027 Hefei, China
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, 117583 Singapore, Singapore
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23
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Liu Y, Perera T, Shi Q, Yong Z, Mallawaarachchi S, Fan B, Walker JAT, Lupton CJ, Thang SH, Premaratne M, Cheng W. Thermoresponsive chiral plasmonic nanoparticles. NANOSCALE 2022; 14:4292-4303. [PMID: 35244653 DOI: 10.1039/d1nr08343k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chiral metallic nanoparticles can exhibit novel plasmonic circular dichroism (PCD) in the ultraviolet and visible range of the electromagnetic spectrum. Here, we investigate how thermoresponsive dielectric nanoenvironments will influence such PCD responses through poly(N-isopropylacrylamide) (PNIPAM) modified chiral gold nanorods (AuNRs). We observed the temperature-dependent chiral plasmonic responses distinctly from unmodified counterparts. As for the modified systems, the PCD peaks for both L-AuNRs and D-AuNRs at 50 °C red shifted simultaneously with enhanced intensities compared to the results at 20 °C. In contrast, the unmodified L-AuNRs and D-AuNRs exhibited no peak shift with reduced intensities. Subsequent simulation and experimental studies demonstrated that the enhanced PCD was attributed to PNIPAM chain collapse causing the increase of the refractive index by expelling minute water out of the corona surrounding chiral plasmonic AuNRs. Notably, such thermoresponsive chiral plasmonic responses are reversible, general, and extendable to other types of chiral plasmonic nanoparticles.
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Affiliation(s)
- Yiyi Liu
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Tharaka Perera
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Qianqian Shi
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Zijun Yong
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Sudaraka Mallawaarachchi
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Bo Fan
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Julia Ann-Therese Walker
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
- Drug Delivery, Disposition and Dynamic, Monash Institute of Pharmaceutical Sciences, Parkville, Victoria 3052, Australia
| | - Christopher J Lupton
- Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - San H Thang
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Malin Premaratne
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Wenlong Cheng
- Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia.
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24
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Both S, Schäferling M, Sterl F, Muljarov EA, Giessen H, Weiss T. Nanophotonic Chiral Sensing: How Does It Actually Work? ACS NANO 2022; 16:2822-2832. [PMID: 35080371 DOI: 10.1021/acsnano.1c09796] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanophotonic chiral sensing has recently attracted a lot of attention. The idea is to exploit the strong light-matter interaction in nanophotonic resonators to determine the concentration of chiral molecules at ultralow thresholds, which is highly attractive for numerous applications in life science and chemistry. However, a thorough understanding of the underlying interactions is still missing. The theoretical description relies on either simple approximations or on purely numerical approaches. We close this gap and present a general theory of chiral light-matter interactions in arbitrary resonators. Our theory describes the chiral interaction as a perturbation of the resonator modes, also known as resonant states or quasi-normal modes. We observe two dominant contributions: A chirality-induced resonance shift and changes in the modes' excitation and emission efficiencies. Our theory brings deep insights for tailoring and enhancing chiral light-matter interactions. Furthermore, it allows us to predict spectra much more efficiently in comparison to conventional approaches. This is particularly true, as chiral interactions are inherently weak and therefore perturbation theory fits extremely well for this problem.
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Affiliation(s)
- Steffen Both
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Martin Schäferling
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Florian Sterl
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Egor A Muljarov
- Cardiff University, School of Physics and Astronomy, The Parade, CF24 3AA, Cardiff, United Kingdom
| | - Harald Giessen
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Thomas Weiss
- 4th Physics Institute and Research Center SCoPE, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
- Institute of Physics, University of Graz, and NAWI Graz, Universitätsplatz 5, 8010 Graz, Austria
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25
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Carone A, Mariani P, Désert A, Romanelli M, Marcheselli J, Garavelli M, Corni S, Rivalta I, Parola S. Insight on Chirality Encoding from Small Thiolated Molecule to Plasmonic Au@Ag and Au@Au Nanoparticles. ACS NANO 2022; 16:1089-1101. [PMID: 34994190 DOI: 10.1021/acsnano.1c08824] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chiral plasmonic nanomaterials exhibiting intense optical activity are promising for numerous applications. In order to prepare those nanostructures, one strategy is to grow metallic nanoparticles in the presence of chiral molecules. However, in such approach the origin of the observed chirality remains uncertain. In this work, we expand the range of available chiral plasmonic nanostructures and we propose another vision of the origin of chirality in such colloidal systems. For that purpose, we investigated the synthesis of two core-shell Au@Ag and Au@Au systems built from gold nanobipyramid cores, in the presence of cysteine. The obtained nanoparticles possess uniform shape and size and show plasmonic circular dichroism in the visible range, and were characterized by electron microscopy, circular dichroism, and UV-vis-NIR spectroscopy. Opto-chiral responses were found to be highly dependent on the morphology and the plasmon resonance. It revealed (i) the importance of the anisotropy for Au@Au nanoparticles and (ii) the role of the multipolar modes for Au@Ag nanoparticles on the way to achieve intense plasmonic circular dichroism. The role of cysteine as shaping agent and as chiral encoder was particularly evaluated. Our experimental results, supported by theoretical simulations, contrast the hypothesis that chiral molecules entrapped in the nanoparticles determine the chiral properties, highlighting the key role of the outmost part of the nanoparticles shell on the plasmonic circular dichroism. Along with these results, the impact of enantiomeric ratio of cysteine on the final shape suggested that the presence of a chiral shape or chiral patterns should be considered.
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Affiliation(s)
- Antonio Carone
- Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 allée d'Italie, F-69364 Lyon, France
| | - Pablo Mariani
- Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 allée d'Italie, F-69364 Lyon, France
| | - Anthony Désert
- Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 allée d'Italie, F-69364 Lyon, France
| | - Marco Romanelli
- Dipartimento di Scienze Chimiche, Università di Padova, 35131 Padova, Italy
- Istituto di Nanoscienze, Consiglio Nazionale delle Ricerche CNR-NANO, 41125 Modena, Italy
| | - Jacopo Marcheselli
- Dipartimento di Chimica Industriale "Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
- SISSA─Scuola Internazionale Superiore di Studi Avanzati, Via Bonomea 265, 34136 Trieste, Italy
| | - Marco Garavelli
- Dipartimento di Chimica Industriale "Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Stefano Corni
- Dipartimento di Scienze Chimiche, Università di Padova, 35131 Padova, Italy
- Istituto di Nanoscienze, Consiglio Nazionale delle Ricerche CNR-NANO, 41125 Modena, Italy
| | - Ivan Rivalta
- Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 allée d'Italie, F-69364 Lyon, France
- Dipartimento di Chimica Industriale "Toso Montanari″, Università degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Stephane Parola
- Université de Lyon, École Normale Supérieure de Lyon, Université Lyon 1, CNRS UMR 5182, Laboratoire de Chimie, 46 allée d'Italie, F-69364 Lyon, France
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26
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Besteiro LV, Movsesyan A, Ávalos-Ovando O, Lee S, Cortés E, Correa-Duarte MA, Wang ZM, Govorov AO. Local Growth Mediated by Plasmonic Hot Carriers: Chirality from Achiral Nanocrystals Using Circularly Polarized Light. NANO LETTERS 2021; 21:10315-10324. [PMID: 34860527 PMCID: PMC8704195 DOI: 10.1021/acs.nanolett.1c03503] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/08/2021] [Indexed: 05/05/2023]
Abstract
Plasmonic nanocrystals and their assemblies are excellent tools to create functional systems, including systems with strong chiral optical responses. Here we study the possibility of growing chiral plasmonic nanocrystals from strictly nonchiral seeds of different types by using circularly polarized light as the chirality-inducing mechanism. We present a novel theoretical methodology that simulates realistic nonlinear and inhomogeneous photogrowth processes in plasmonic nanocrystals, mediated by the excitation of hot carriers that can drive surface chemistry. We show the strongly anisotropic and chiral growth of oriented nanocrystals with lowered symmetry, with the striking feature that such chiral growth can appear even for nanocrystals with subwavelength sizes. Furthermore, we show that the chiral growth of nanocrystals in solution is fundamentally challenging. This work explores new ways of growing monolithic chiral plasmonic nanostructures and can be useful for the development of plasmonic photocatalysis and fabrication technologies.
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Affiliation(s)
- Lucas V. Besteiro
- Institute
of Fundamental and Frontier Sciences, University
of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
- Centre
Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec J3X 1S2, Canada
- CINBIO, Universidade de Vigo, 36310 Vigo, Spain
| | - Artur Movsesyan
- Institute
of Fundamental and Frontier Sciences, University
of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
- Department
of Physics and Astronomy and the Nanoscale & Quantum Phenomena
Institute, Ohio University, Athens, Ohio 45701, United States
| | - Oscar Ávalos-Ovando
- Department
of Physics and Astronomy and the Nanoscale & Quantum Phenomena
Institute, Ohio University, Athens, Ohio 45701, United States
| | - Seunghoon Lee
- Chair
in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany
| | - Emiliano Cortés
- Chair
in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany
| | | | - Zhiming M. Wang
- Institute
of Fundamental and Frontier Sciences, University
of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
- Institute
for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Alexander O. Govorov
- Institute
of Fundamental and Frontier Sciences, University
of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
- Department
of Physics and Astronomy and the Nanoscale & Quantum Phenomena
Institute, Ohio University, Athens, Ohio 45701, United States
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27
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Perera T, Mallawaarachchi S, Premaratne M. Chiral Plasmonic Ellipsoids: An Extended Mie-Gans Model. J Phys Chem Lett 2021; 12:11214-11219. [PMID: 34761942 DOI: 10.1021/acs.jpclett.1c03144] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mie-Gans theory optically characterizes ellipsoidal and by extension generally elongated nonchiral metal nanoparticles (MNPs) and is ubiquitous in verifying experimental results and predicting particle behavior. Recently, elongated chiral MNPs have garnered enthusiasm, but a theory to characterize their chiroptical behavior is lacking in the literature. In this Letter, we present an ab initio model for chiral ellipsoidal MNPs to address this shortcoming and demonstrate that it reduces to the general Mie-Gans model under nonchiral conditions, produces results that concur with state-of-the-art numerical simulations, and can accurately replicate recent experimental measurements. Furthermore, to gain physical insights, we analyze factors such as background medium permittivity and particle size that drive the chiroptical activity using two types of plasmonic chiral MNPs. We also demonstrate the utility of our model in metamaterial design. Generic features of our model can be extended to characterize similar elongated chiral MNPs, fueling many other variants of the current model.
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Affiliation(s)
- Tharaka Perera
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Sudaraka Mallawaarachchi
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia
- Melbourne Integrative Genomics, School of Mathematics and Statistics, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Malin Premaratne
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia
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28
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Spaeth P, Adhikari S, Baaske MD, Pud S, Ton J, Orrit M. Photothermal Circular Dichroism of Single Nanoparticles Rejecting Linear Dichroism by Dual Modulation. ACS NANO 2021; 15:16277-16285. [PMID: 34550678 PMCID: PMC8552490 DOI: 10.1021/acsnano.1c05374] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Circular dichroism (CD) is the property of chiral nanoobjects to absorb circularly polarized light of either handedness to different extents. Photothermal microscopy enables the detection of CD signals with high sensitivity and provides a direct absorptive response of the samples under study. To achieve CD measurements at the single-particle level, one must reduce such artifacts as leakage of linear dichroism (LD) and residual intensity modulation. We have simulated our setup with a simple model, which allows us to tune modulation parameters to obtain a CD signal virtually free from artifacts. We demonstrate the sensitivity of our setup by measuring the very weak inherent CD signals of single gold nanospheres. We furthermore demonstrate that our method can be extended to obtain spectra of the full absorptive properties of single nanoparticles, including isotropic absorption, linear dichroism, and circular dichroism. We then investigate nominally achiral gold nanoparticles immersed in a chiral liquid. Carefully taking into account the intrinsic chirality of the particles and its change due to heat-induced reshaping, we find that the chiral liquid carvone surrounding the particle has no measurable effect on the particles' chirality, down to g-factors of 3 × 10-4.
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Affiliation(s)
- Patrick Spaeth
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
| | - Subhasis Adhikari
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
| | - Martin Dieter Baaske
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
| | - Sergii Pud
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
| | - Jacco Ton
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
| | - Michel Orrit
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, Leiden, 2300 Rapenburg, Netherlands
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29
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Long- and short-ranged chiral interactions in DNA-assembled plasmonic chains. Nat Commun 2021; 12:2025. [PMID: 33795690 PMCID: PMC8016906 DOI: 10.1038/s41467-021-22289-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/04/2021] [Indexed: 02/01/2023] Open
Abstract
Circular dichroism (CD) has long been used to trace chiral molecular states and changes of protein configurations. In recent years, chiral plasmonic nanostructures have shown potential for applications ranging from pathogen sensing to novel optical materials. The plasmonic coupling of the individual elements of such metallic structures is a crucial prerequisite to obtain sizeable CD signals. We here identify and implement various coupling entities-chiral and achiral-to demonstrate chiral transfer over distances close to 100 nm. The coupling is realized by an achiral nanosphere situated between a pair of gold nanorods that are arranged far apart but in a chiral fashion using DNA origami. The transmitter particle causes a strong enhancement of the CD response, the emergence of an additional chiral feature at the resonance frequency of the nanosphere, and a redshift of the longitudinal plasmonic resonance frequency of the nanorods. Matching numerical simulations elucidate the intricate chiral optical fields in complex architectures.
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30
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Zheng G, He J, Kumar V, Wang S, Pastoriza-Santos I, Pérez-Juste J, Liz-Marzán LM, Wong KY. Discrete metal nanoparticles with plasmonic chirality. Chem Soc Rev 2021; 50:3738-3754. [PMID: 33586721 DOI: 10.1039/c9cs00765b] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
From a geometrical perspective, a chiral object does not have mirror planes or inversion symmetry. It exhibits the same physical properties as its mirror image (enantiomer), except for the chiroptical activity, which is often the opposite. Recent advancements have identified particularly interesting implications of chirality on the optical properties of metal nanoparticles, which are intimately related to localized surface plasmon resonance phenomena. Although such resonances are usually independent of the circular polarization of light, specific strategies have been applied to induce chirality, both in assemblies and at the single-particle level. In this tutorial review, we discuss the origin of plasmonic chirality, as well as theoretical models that have been proposed to explain it. We then summarise recent developments in the synthesis of discrete nanoparticles with plasmonic chirality by means of wet-chemistry methods. We conclude with a discussion of promising applications for discrete chiral nanoparticles. We expect this tutorial review to be of interest to researchers from a wide variety of disciplines where chiral plasmonics can be exploited at the nanoparticle level, such as chemical sensing, photocatalysis, photodynamic or photothermal therapies, etc.
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Affiliation(s)
- Guangchao Zheng
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450001, P. R. China
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31
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Wang Y, Wang Q, Wang Q, Wang Y, Li Z, Lan X, Dong J, Gao W, Han Q, Zhang Z. Dynamically adjustable-induced THz circular dichroism and biosensing application of symmetric silicon-graphene-metal composite nanostructures. OPTICS EXPRESS 2021; 29:8087-8097. [PMID: 33820261 DOI: 10.1364/oe.419614] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
Induced circular dichroism (ICD) has been used to detect biomolecular conformations through the coupling between chiral molecules and achiral metal nanostructures with the localized surface plasmon (LSP). However, this ICD is always weak and cannot be dynamically adjusted. Here, we put dielectric and graphene nanostructures on a metal-substrate for restricting more light energies and obtaining dynamic adjustable performance. A composite nanostructure array composed of achiral silicon-nanorods on a metal-substrate and graphene-ribbons (ASMG) is theoretically investigated. Two strong ICD signals appear in the THz region. Near-field magnetic distributions of ASMG reveal that the two strong ICD signals are mainly due to the surface plasmon resonances (SPPs) on the metal-substrate and LSP in the graphene nanostructures, respectively. The ICD signals strongly depend on the geometric parameters of ASMG and are dynamically adjusted by just changing the Fermi levels of graphene-ribbons. In addition, left-handed ASMG and right-handed ASMG can be used to identify the chiral molecular solutions with different chiralities. The maximum enhancement factor of the chiral molecular solutions could reach up to 3500 times in the THz region. These results can help to design dynamically adjustable THz chiral sensors and promote their application in biological monitoring and asymmetric catalysis.
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32
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Chen Y, Zhao C, Zhang Y, Qiu CW. Integrated Molar Chiral Sensing Based on High- Q Metasurface. NANO LETTERS 2020; 20:8696-8703. [PMID: 33215497 DOI: 10.1021/acs.nanolett.0c03506] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Circular dichroism (CD) spectroscopy is conventionally utilized for the enantiomer-specific analysis of chiral samples, which is of great significance in academia and industry. Recently, metasurfaces have been introduced for enhancing the sensitivity of CD spectroscopy. However, the obtained CD spectrum alone cannot provide the enantiomer composition of a chiral sample. It should be normalized by the molar concentration of chiral molecules, which is usually measured on a different platform. Here, for the first time we demonstrate the integrated acquisition of CD spectrum and molar concentration over an individual metasurface with high sensitivities. High-Q resonances are supported on the metasurface, governed by bound states in the continuum. The generated superchiral field enables a 59-times enhancement of CD signal. Meanwhile, the refractive index-based detection of molar concentration achieves a large figure-of-merit of 80.6. Accordingly, a standard procedure is established for the integrated molar chiral sensing with high sensitivity.
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Affiliation(s)
- Yang Chen
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Chen Zhao
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
- College of Materials Science and Engineering and Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
| | - Yongzhe Zhang
- College of Materials Science and Engineering and Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology, Beijing 100124, China
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
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33
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Yu H, Qu W, Liu F, Mehl GH. Two helices from one chiral centre - self organization of disc shaped chiral nanoparticles. Chem Sci 2020; 12:1778-1782. [PMID: 34163939 PMCID: PMC8179125 DOI: 10.1039/d0sc05100d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/30/2020] [Indexed: 11/21/2022] Open
Abstract
Gold nanoparticles (AuNPs) have been prepared and surface-functionalized with a mixture of 1-hexanethiol co-ligands and chiral discogen ligands separated from a disulfide function via a flexible spacer. Polarized optical microscopy together with differential scanning calorimetry showed that the organic corona of the nanocomposite forms a stable chiral discotic nematic phase with a wide thermal range. Synchrotron X-ray diffraction showed that gold NPs form a superlattice with p2 plane symmetry. Analysis indicated that the organic corona takes up the shape of a flexible macrodisk. Synchrotron radiation-based circular dichroism signals of thin films are significantly enhanced on the isotropic-LC transition, in line with the formation of a chiral nematic phase of the organic corona. At lower temperatures the appearance of CD signals at longer wavelengths is associated with the chiral organisation of the NPs and is indicative of the formation of a second helical structure. The decreased volume required and the chiral environment of the disc ligands drives the nanoparticles into columns that arrange helically, parallel to the shortest axis of the two dimensional lattice.
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Affiliation(s)
- Huanan Yu
- Department of Chemistry, University of Hull Hull HU6 7RX UK
| | - Wentao Qu
- State Key Laboratory for Mechanical Behaviour of Materials, Shaanxi International Research Centre for Soft Matter, Xi'an Jiaotong University Xi'an P. R. China
| | - Feng Liu
- State Key Laboratory for Mechanical Behaviour of Materials, Shaanxi International Research Centre for Soft Matter, Xi'an Jiaotong University Xi'an P. R. China
| | - Georg H Mehl
- Department of Chemistry, University of Hull Hull HU6 7RX UK
- State Key Laboratory for Mechanical Behaviour of Materials, Shaanxi International Research Centre for Soft Matter, Xi'an Jiaotong University Xi'an P. R. China
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34
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Cao Z, Gao H, Qiu M, Jin W, Deng S, Wong KY, Lei D. Chirality Transfer from Sub-Nanometer Biochemical Molecules to Sub-Micrometer Plasmonic Metastructures: Physiochemical Mechanisms, Biosensing, and Bioimaging Opportunities. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907151. [PMID: 33252162 DOI: 10.1002/adma.201907151] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 06/21/2020] [Indexed: 05/05/2023]
Abstract
Determining the structural chirality of biomolecules is of vital importance in bioscience and biomedicine. Conventional methods for characterizing molecular chirality, e.g., circular dichroism (CD) spectroscopy, require high-concentration specimens due to the weak electronic CD signals of biomolecules such as amino acids. Artificially designed chiral plasmonic metastructures exhibit strong intrinsic chirality. However, the significant size mismatch between metastructures and biomolecules makes the former unsuitable for chirality-recognition-based molecular discrimination. Fortunately, constructing metallic architectures through molecular self-assembly allows chirality transfer from sub-nanometer biomolecules to sub-micrometer, intrinsically achiral plasmonic metastructures by means of either near-field interaction or chirality inheritance, resulting in hybrid systems with CD signals orders of magnitude larger than that of pristine biomolecules. This exotic property provides a new means to determine molecular chirality at extremely low concentrations (ideally at the single-molecule level). Herein, three strategies of chirality transfer from sub-nanometer biomolecules to sub-micrometer metallic metastructures are analyzed. The physiochemical mechanisms responsible for chirality transfer are elaborated and new fascinating opportunities for employing plasmonic metastructures in chirality-based biosensing and bioimaging are outlined.
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Affiliation(s)
- Zhaolong Cao
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Han Gao
- Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Meng Qiu
- Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Wei Jin
- Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Shaozhi Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Kwok-Yin Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Dangyuan Lei
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, 999077, China
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35
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Kong XT, Besteiro LV, Wang Z, Govorov AO. Plasmonic Chirality and Circular Dichroism in Bioassembled and Nonbiological Systems: Theoretical Background and Recent Progress. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1801790. [PMID: 30260543 DOI: 10.1002/adma.201801790] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/25/2018] [Indexed: 05/22/2023]
Abstract
Nature is chiral, thus chirality is a key concept required to understand a multitude of systems in physics, chemistry, and biology. The field of optics offers valuable tools to probe the chirality of nanosystems, including the measurement of circular dichroism, the differential interaction strength between matter and circularly polarized light with opposite helicity. Simultaneously, the use of plasmonic systems with giant light-interaction cross-sections opens new paths to investigate and manipulate systems on the nanoscale. Consequently, the interest in chiral plasmonic and hybrid systems has continually grown in recent years, due to their potential applications in biosensing, polarization-encoded optical communication, polarization-selective chemical reactions, and materials with polarization-dependent light-matter interaction. Experimentally, chiral properties of nanostructures can be either created artificially using modern fabrication techniques involving inorganic materials, or borrowed from nature using bioassembly or biomolecular templating. Herein, the recent progress in the field of plasmonic chirality is summarized, with a focus on both the theoretical background and the experimental advances in the study of chirality in various systems, including molecular-plasmonic assemblies, chiral plasmonic nanostructures, chiral assemblies of interacting plasmonic nanoparticles, and chiral metal metasurfaces and metamaterials. The growth prospects of this field are also discussed.
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Affiliation(s)
- Xiang-Tian Kong
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Department of Physics and Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Lucas V Besteiro
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Centre Énergie Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Alexander O Govorov
- Department of Physics and Astronomy, Ohio University, Athens, OH, 45701, USA
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36
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Wu W, Liu W, Chun Z, Ling Y, Ding J, Wang X, Huang L, Li H. Optical rotation and electromagnetically induced transparency in a chiral metamaterial with C 4 symmetry. OPTICS EXPRESS 2020; 28:29496-29512. [PMID: 33114849 DOI: 10.1364/oe.403421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
We design and fabricate a double-layered chiral metamaterial with 4-fold rotational symmetry, which simultaneously exhibits optical rotation and electromagnetically induced transparency (EIT) effects. Using analytical equivalent circuit model and Lorentz's coupled oscillator model, we interpret the physical mechanisms and derive material equations. Importantly, we find that magnetic dipole and electric quadrupole play important roles in optical rotation and keeping the symmetry of the material equations. Our work offers a better understanding of optical rotation in chiral metamaterials, and provides a new and simple approach to combine optical rotation and EIT effects into a single metamaterial.
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37
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Droulias S, Bougas L. Absolute Chiral Sensing in Dielectric Metasurfaces Using Signal Reversals. NANO LETTERS 2020; 20:5960-5966. [PMID: 32608985 DOI: 10.1021/acs.nanolett.0c01938] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sensing molecular chirality at the nanoscale has been a long-standing challenge due to the inherently weak nature of chiroptical signals, and nanophotonic approaches have proven fruitful in accessing these signals. However, in most cases, complete sensing of the chiral part of the molecule's refractive index (magnitude and sign of both its real and imaginary part) has not been possible, while the strong inherent signals from the nanostructures themselves obscure the weak chiroptical signals. Here, we propose a dielectric metamaterial system that overcomes these limitations and allows for complete measurements of the total chirality and discrimination of the effects of its real and imaginary part, possible also in an absolute manner via the application of a crucial signal reversal (excitation with reversed polarization) that enables chirality measurements without the need for sample removal. As proof of principle, we demonstrate signal enhancements by a factor of 200 for ultrathin, subwavelength, chiral samples over a uniform and accessible area.
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Affiliation(s)
- Sotiris Droulias
- Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, 71110 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Greece
| | - Lykourgos Bougas
- Institut für Physik, Johannes Gutenberg Universität Mainz, 55128 Mainz, Germany
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38
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Ming Y, Chen F, Wu X, Pang L, Gao F, Hou Y. Asymmetric chiroptical effect from chiral medium filled golden slit grating on substrate. OPTICS LETTERS 2020; 45:1330-1333. [PMID: 32163957 DOI: 10.1364/ol.384773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
In this Letter, we report a giant and robust asymmetric chiroptical effect (ACOE) in the chiral medium filled golden slit grating on glass substrate (CMGSG-GS). This ACOE comes from the influence of interface asymmetry on the electromagnetic cross-coupling in the CMGSG-GS, and it is inherently different than that reported in the Faraday medium and the planar anisotropic chiral metamaterials. Both the polarization eigenstate and the transmission matrix are highly dependent on the metal structure used in the CMGSG-GS. The polarization eigenstates of the CMGSG-GS are two co-rotating elliptical states with ellipticity of nearly 0, and they remain mostly unchanged for opposite directions. The transmission matrices of opposite directions are normal matrices, which do not show any symmetric law although the geometry of the CMGSG-GS owns a high rotational symmetry. The reported ACOE gives a measurable physical parameter to reveal the events happening at interface.
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39
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García-Guirado J, Svedendahl M, Puigdollers J, Quidant R. Enhanced Chiral Sensing with Dielectric Nanoresonators. NANO LETTERS 2020; 20:585-591. [PMID: 31851826 DOI: 10.1021/acs.nanolett.9b04334] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Chiro-sensitive molecular detection is highly relevant as many biochemical compounds, the building blocks of life, are chiral. Optical chirality is conventionally detected through circular dichroism (CD) in the UV range, where molecules naturally absorb. Recently, plasmonics has been proposed as a way to boost the otherwise very weak CD signal and translate it to the visible/NIR range, where technology is friendlier. Here, we explore how dielectric nanoresonators can contribute to efficiently differentiate molecular enantiomers. We study the influence of the detuning between electric (ED) and magnetic dipole (MD) resonances in silicon nanocylinders on the quality of the CD signal. While our experimental data, supported by numerical simulations, demonstrate that dielectric nanoresonators can perform even better than their plasmonic counterpart, exhibiting larger CD enhancements, we do not observe any significant influence of the optical chirality.
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Affiliation(s)
- Jose García-Guirado
- ICFO-Institut de Ciències Fotòniques , The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
| | - Mikael Svedendahl
- KTH Royal Institute of Technology , Roslagstullsbacken 21 , 10691 Stockholm , Sweden
| | - Joaquim Puigdollers
- Universitat Politècnica de Catalunya (UPC) , Departament d'Ingeniería Electrónica , 08034 Barcelona , Spain
| | - Romain Quidant
- ICFO-Institut de Ciències Fotòniques , The Barcelona Institute of Science and Technology , 08860 Castelldefels, Barcelona , Spain
- ICREA-Institució Catalana de Recerca I Estudis Avançats , 08010 Barcelona , Spain
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40
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Nemati A, Shadpour S, Querciagrossa L, Mori T, Zannoni C, Hegmann T. Highly Sensitive, Tunable Chirality Amplification through Space Visualized for Gold Nanorods Capped with Axially Chiral Binaphthyl Derivatives. ACS NANO 2019; 13:10312-10326. [PMID: 31424907 DOI: 10.1021/acsnano.9b03787] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The creation and transmission of chirality in molecular systems is a well-known, widely applied notion. Our understanding of how the chirality of nanomaterials can be controlled, measured, transmitted through space, and applied is less well understood. Dynamic assemblies for chiral sensing or metamaterials engineered from chiral nanomaterials require exact methods to determine transmission and amplification of nanomaterial chirality through space. We report the synthesis of a series of gold nanorods (GNRs) with a constant aspect ratio of ∼4.3 capped with C2-symmetric, axially chiral binaphthyl thiols, preparation of dispersions in the nematic liquid crystal 5CB, measurements of the helical pitch, and the determination of the helical twisting power as well as the average distance between the chiral nanomaterial additives. By comparison to the neat organic chiral derivatives, we demonstrate how the amplification of chirality facilitated by GNRs decorated with chiral molecules can be used to clearly distinguish the chiral induction strength of a homologous series of binaphthyl derivatives, differing only in the length of the nontethered aliphatic chain, in the induced chiral nematic liquid crystal phase. Considering systematic errors in sample preparation and optical measurements, these chiral molecules would otherwise be deemed identical with respect to chiral induction. Notably, we find some of the highest ever-reported values of the helical twisting power. We further support our experimentally derived arguments of a more comprehensive understanding of chirality transfer by calculations of a suitable pseudoscalar chirality indicator.
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Affiliation(s)
- Ahlam Nemati
- Advanced Materials and Liquid Crystal Institute, Chemical Physics Interdisciplinary Program , Kent State University , Kent , Ohio 44242 , United States
| | - Sasan Shadpour
- Advanced Materials and Liquid Crystal Institute, Chemical Physics Interdisciplinary Program , Kent State University , Kent , Ohio 44242 , United States
| | - Lara Querciagrossa
- Dipartimento di Chimica Industriale "Toso Montanari" and INSTM , Università di Bologna , Viale Risorgimento 4 , IT-40136 Bologna , Italy
| | - Taizo Mori
- Graduate School of Frontier Science , The University of Tokyo , 5-1-5, Kashiwanoha , Kashiwa 277-0827 , Japan
| | - Claudio Zannoni
- Dipartimento di Chimica Industriale "Toso Montanari" and INSTM , Università di Bologna , Viale Risorgimento 4 , IT-40136 Bologna , Italy
| | - Torsten Hegmann
- Advanced Materials and Liquid Crystal Institute, Chemical Physics Interdisciplinary Program , Kent State University , Kent , Ohio 44242 , United States
- Department of Chemistry and Biochemistry , Kent State University , Kent , Ohio 44242 , United States
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41
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Orientation of Chiral Schiff Base Metal Complexes Involving Azo-Groups for Induced CD on Gold Nanoparticles by Polarized UV Light Irradiation. Symmetry (Basel) 2019. [DOI: 10.3390/sym11091094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, we report the synthesis, characterization, and chiroptical properties of azo-group-containing chiral salen type Schiff base Ni(II), Cu(II), and Zn(II) complexes absorbed on gold nanoparticles (AuNPs) of 10 nm diameters. Induced circular dichroism (CD) around the plasmon region from the chiral species weakly adsorbed on the surface of AuNP were observed when there were appropriate dipole–dipole interactions at the initial states. Spectral changes were also observed by not only cis-trans photoisomerization of azo-groups but also changes of orientation due to Weigert effect of azo-dyes after linearly polarized UV light irradiation. Spatial features were discussed based on dipole-dipole interactions mainly within an exciton framework.
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42
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Urban MJ, Shen C, Kong XT, Zhu C, Govorov AO, Wang Q, Hentschel M, Liu N. Chiral Plasmonic Nanostructures Enabled by Bottom-Up Approaches. Annu Rev Phys Chem 2019; 70:275-299. [DOI: 10.1146/annurev-physchem-050317-021332] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We present a comprehensive review of recent developments in the field of chiral plasmonics. Significant advances have been made recently in understanding the working principles of chiral plasmonic structures. With advances in micro- and nanofabrication techniques, a variety of chiral plasmonic nanostructures have been experimentally realized; these tailored chiroptical properties vastly outperform those of their molecular counterparts. We focus on chiral plasmonic nanostructures created using bottom-up approaches, which not only allow for rational design and fabrication but most intriguingly in many cases also enable dynamic manipulation and tuning of chiroptical responses. We first discuss plasmon-induced chirality, resulting from the interaction of chiral molecules with plasmonic excitations. Subsequently, we discuss intrinsically chiral colloids, which give rise to optical chirality owing to their chiral shapes. Finally, we discuss plasmonic chirality, achieved by arranging achiral plasmonic particles into handed configurations on static or active templates. Chiral plasmonic nanostructures are very promising candidates for real-life applications owing to their significantly larger optical chirality than natural molecules. In addition, chiral plasmonic nanostructures offer engineerable and dynamic chiroptical responses, which are formidable to achieve in molecular systems. We thus anticipate that the field of chiral plasmonics will attract further widespread attention in applications ranging from enantioselective analysis to chiral sensing, structural determination, and in situ ultrasensitive detection of multiple disease biomarkers, as well as optical monitoring of transmembrane transport and intracellular metabolism.
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Affiliation(s)
| | - Chenqi Shen
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine Research, and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215213, China
| | - Xiang-Tian Kong
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - Chenggan Zhu
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine Research, and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215213, China
| | - Alexander O. Govorov
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qiangbin Wang
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine Research, and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215213, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mario Hentschel
- 4th Physics Institute and Stuttgart Research Center of Photonic Engineering (SCoPE), University of Stuttgart, 70569 Stuttgart, Germany
| | - Na Liu
- Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany
- Kirchhoff-Institute for Physics, University of Heidelberg, 69120 Heidelberg, Germany
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43
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Yang X, Li M, Hou Y, Du J, Gao F. Active perfect absorber based on planar anisotropic chiral metamaterials. OPTICS EXPRESS 2019; 27:6801-6814. [PMID: 30876258 DOI: 10.1364/oe.27.006801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/01/2019] [Indexed: 06/09/2023]
Abstract
Active chiral plasmonics have attracted a considerable amount of research interest for their power to switch the handedness of chiral metamaterials and the potential applications in highly integrated polarization sensitive devices, stereo display fields, and so on. In this work, we propose a kind of active chiral metamaterial absorber (ACMA) composed by planar anisotropic chiral metamaterials (PACMs) and a metal layer. Our in-depth theoretical analysis indicates that the circular conversion dichroism (CCD) from PACMs plays a crucial role to achieve the active chiroptical effect. The CCD effect can enable a differentiated microcavity-interference effect between the left and right circular incident lights and results in a chiroptical effect related to the equivalent optical length between the PACMs and the metal layer. In simulations, a high-performance ACMA, which are composed by the 'Z'-shaped PACMs, is designed, and the maximum reflection CDR from ACMA can reach 0.882. Meanwhile, the minimum reflection CDR can reach to 0, resulting a very large adjustable range of from 0 to 0.882. The maximum modulation sensitivity, which is defined as Mn=∂CDR/∂n and Md=∂CDR/∂d, can reach to about 1368.252 for d=100um and 0.06157 nm-1 for n=4.5,respectively. In addition to the active chiroptical effect, the designed ACMA also shows excellent performance as a sensor, such as when it is being used as a highly-sensitive temperature sensor. In that case, the minimum detected precision can reach approximately 3.067 * 10-8 °C, if VO2 is used to fill the FP cavity.
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44
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Wu Z, Liu Y, Hill EH, Zheng Y. Chiral metamaterials via Moiré stacking. NANOSCALE 2018; 10:18096-18112. [PMID: 30004551 DOI: 10.1039/c8nr04352c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chiral metamaterials have attracted strong interest due to their versatile capabilities in spin-dependent light manipulation. Benefiting from advancements in nanofabrication and mechanistic understanding of chiroptical effects, chiral metamaterials have shown potential in a variety of applications including circular polarizers, chiral sensors, and chiroptical detectors. Recently, chiral metamaterials made by moiré stacking, superimposing two or more periodic patterns with different lattice constants or relative spatial displacement, have shown promise for chiroptical applications. The moiré chiral metamaterials (MCMs) take advantage of lattice-dependent chirality, giving cost-effective fabrication, flexible tunability, and reconfigurability superior to conventional chiral metamaterials. This feature article focuses on recent progress of MCMs. We discuss optical mechanisms, structural design, fabrication, and applications of the MCMs. We conclude with our perspectives on the future opportunities for the MCMs.
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Affiliation(s)
- Zilong Wu
- Department of Mechanical Engineering, Materials Science and Engineering Program, and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA.
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45
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Mun J, Rho J. Surface-enhanced circular dichroism by multipolar radiative coupling. OPTICS LETTERS 2018; 43:2856-2859. [PMID: 29905707 DOI: 10.1364/ol.43.002856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/17/2018] [Indexed: 06/08/2023]
Abstract
We present numerical investigation of the mechanism of surface-enhanced circular dichroism of a chiral medium near nanoantennas. Strong circular dichroism was observed from the chiral medium surrounding nanoantennas with multipolar resonant modes, and the strong circular dichroism was more correlated to the multipolar resonances than to nearfield enhancement or optical helicity enhancement. According to this observation, we suggest multipolar radiative coupling between the nanoantennas and chiral medium as a possible mechanism of the strong chiral response. This work clarifies a mechanism of surface-enhanced chiral responses and would be useful for designing an enantiomeric-sensing platform and realizing devices relying on strong chirality, such as topological metamaterials for scattering-immune propagation of light and negative index metamaterials.
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46
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Pellegrini G, Finazzi M, Celebrano M, Duò L, Biagioni P. Surface-enhanced chiroptical spectroscopy with superchiral surface waves. Chirality 2018; 30:883-889. [PMID: 29782670 DOI: 10.1002/chir.22971] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/06/2022]
Abstract
We study the chiroptical properties of one-dimensional photonic crystals supporting superchiral surface waves by introducing a simple formalism based on the Fresnel reflection matrix. We show that the proposed framework provides useful insights on the behavior of all the relevant chiroptical quantities, allowing for a deeper understanding of surface-enhanced chiral sensing platforms based on one-dimensional photonic crystals. Finally, we analyze and discuss the limitations of such platforms as the surface concentration of the target chiral analytes is gradually increased.
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Affiliation(s)
| | - Marco Finazzi
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
| | | | - Lamberto Duò
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
| | - Paolo Biagioni
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
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47
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Haran G, Chuntonov L. Artificial Plasmonic Molecules and Their Interaction with Real Molecules. Chem Rev 2018; 118:5539-5580. [DOI: 10.1021/acs.chemrev.7b00647] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Gilad Haran
- Chemical and Biological Physics Department, Weizmann Institute of Science, Rehovot 760001, Israel
| | - Lev Chuntonov
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology, Haifa 3200008, Israel
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48
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Yao K, Liu Y. Enhancing circular dichroism by chiral hotspots in silicon nanocube dimers. NANOSCALE 2018; 10:8779-8786. [PMID: 29713707 DOI: 10.1039/c8nr00902c] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Circular dichroism (CD) spectroscopy, which measures the differential absorption of circularly polarized light with opposite handedness, is an important technique to detect and identify chiral molecules in chemistry, biology and life sciences. However, CD signals are normally very small due to the intrinsically weak chirality of molecules. Here we theoretically investigate the generation of chiral hotspots in silicon nanocube dimers for CD enhancement. Up to 15-fold enhancement of the global optical chirality is obtained in the dimer gap, which boosts the CD signal by one order of magnitude without reducing the dissymmetry factor. This chiral hotspot originates from the simultaneous enhancement of magnetic and electric fields and their proper spatial overlap. Our findings could lead to integrated devices for CD spectroscopy, enantioselective sensing, sorting and synthesis.
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Affiliation(s)
- Kan Yao
- Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115, USA
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49
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Muljarov EA, Weiss T. Resonant-state expansion for open optical systems: generalization to magnetic, chiral, and bi-anisotropic materials. OPTICS LETTERS 2018; 43:1978-1981. [PMID: 29714725 DOI: 10.1364/ol.43.001978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 02/27/2018] [Indexed: 06/08/2023]
Abstract
The resonant-state expansion, a recently developed powerful method in electrodynamics, is generalized here for open optical systems containing magnetic, chiral, or bi-anisotropic materials. It is shown that the key matrix eigenvalue equation of the method remains the same, but the matrix elements of the perturbation now contain variations of the permittivity, permeability, and bi-anisotropy tensors. A general normalization of resonant states in terms of the electric and magnetic fields is presented.
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50
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Tullius R, Platt GW, Khorashad LK, Gadegaard N, Lapthorn AJ, Rotello VM, Cooke G, Barron LD, Govorov AO, Karimullah AS, Kadodwala M. Superchiral Plasmonic Phase Sensitivity for Fingerprinting of Protein Interface Structure. ACS NANO 2017; 11:12049-12056. [PMID: 29220155 PMCID: PMC6034627 DOI: 10.1021/acsnano.7b04698] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The structure adopted by biomaterials, such as proteins, at interfaces is a crucial parameter in a range of important biological problems. It is a critical property in defining the functionality of cell/bacterial membranes and biofilms (i.e., in antibiotic-resistant infections) and the exploitation of immobilized enzymes in biocatalysis. The intrinsically small quantities of materials at interfaces precludes the application of conventional spectroscopic phenomena routinely used for (bio)structural analysis due to a lack of sensitivity. We show that the interaction of proteins with superchiral fields induces asymmetric changes in retardation phase effects of excited bright and dark modes of a chiral plasmonic nanostructure. Phase retardations are obtained by a simple procedure, which involves fitting the line shape of resonances in the reflectance spectra. These interference effects provide fingerprints that are an incisive probe of the structure of interfacial biomolecules. Using these fingerprints, layers composed of structurally related proteins with differing geometries can be discriminated. Thus, we demonstrate a powerful tool for the bioanalytical toolbox.
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Affiliation(s)
- Ryan Tullius
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Geoffrey W. Platt
- Avacta Life Sciences, Ash Way, Thorp Arch Estate, Wetherby, LS23 7FA, UK
| | | | - Nikolaj Gadegaard
- School of Engineering, Rankine Building, University of Glasgow, Glasgow, G12 8LT, UK
| | - Adrian J. Lapthorn
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Vincent M. Rotello
- Department of Chemistry, 710 Nt. Pleasant Street, University of Massachusetts Amherst, MA 01003, USA
| | - Graeme Cooke
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Laurence D. Barron
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
| | | | - Affar S. Karimullah
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
- School of Engineering, Rankine Building, University of Glasgow, Glasgow, G12 8LT, UK
| | - Malcolm Kadodwala
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow, G12 8QQ, UK
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