1
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Adhikari S, Efremova MV, Spaeth P, Koopmans B, Lavrijsen R, Orrit M. Single-Particle Photothermal Circular Dichroism and Photothermal Magnetic Circular Dichroism Microscopy. NANO LETTERS 2024; 24:5093-5103. [PMID: 38578845 PMCID: PMC11066954 DOI: 10.1021/acs.nanolett.4c00448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 04/07/2024]
Abstract
Recent advances in single-particle photothermal circular dichroism (PT CD) and photothermal magnetic circular dichroism (PT MCD) microscopy have shown strong promise for diverse applications in chirality and magnetism. Photothermal circular dichroism microscopy measures direct differential absorption of left- and right-circularly polarized light by a chiral nanoobject and thus can measure a pure circular dichroism signal, which is free from the contribution of circular birefringence and linear dichroism. Photothermal magnetic circular dichroism, which is based on the polar magneto-optical Kerr effect, can probe the magnetic properties of a single nanoparticle (of sizes down to 20 nm) optically. Single-particle measurements enable studies of the spatiotemporal heterogeneity of magnetism at the nanoscale. Both PT CD and PT MCD have already found applications in chiral plasmonics and magnetic nanomaterials. Most importantly, the advent of these microscopic techniques opens possibilities for many novel applications in biology and nanomaterial science.
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Affiliation(s)
- Subhasis Adhikari
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
| | - Maria V. Efremova
- Department
of Applied Physics and Science Education, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Patrick Spaeth
- Department
of Sustainable Energy Materials, AMOLF; Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Bert Koopmans
- Department
of Applied Physics and Science Education, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Reinoud Lavrijsen
- Department
of Applied Physics and Science Education, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Michel Orrit
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
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2
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Lee S, Fan C, Movsesyan A, Bürger J, Wendisch FJ, de S Menezes L, Maier SA, Ren H, Liedl T, Besteiro LV, Govorov AO, Cortés E. Unraveling the Chirality Transfer from Circularly Polarized Light to Single Plasmonic Nanoparticles. Angew Chem Int Ed Engl 2024; 63:e202319920. [PMID: 38236010 DOI: 10.1002/anie.202319920] [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: 12/22/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/19/2024]
Abstract
Due to their broken symmetry, chiral plasmonic nanostructures have unique optical properties and numerous applications. However, there is still a lack of comprehension regarding how chirality transfer occurs between circularly polarized light (CPL) and these structures. Here, we thoroughly investigate the plasmon-assisted growth of chiral nanoparticles from achiral Au nanocubes (AuNCs) via CPL without the involvement of any chiral molecule stimulators. We identify the structural chirality of our synthesized chiral plasmonic nanostructures using circular differential scattering (CDS) spectroscopy, which is correlated with scanning electron microscopy imaging at both the single-particle and ensemble levels. Theoretical simulations, including hot-electron surface maps, reveal that the plasmon-induced chirality transfer is mediated by the asymmetric distribution of hot electrons on achiral AuNCs under CPL excitation. Furthermore, we shed light on how this plasmon-induced chirality transfer can also be utilized for chiral growth in bimetallic systems, such as Ag or Pd on AuNCs. The results presented here uncover fundamental aspects of chiral light-matter interaction and have implications for the future design and optimization of chiral sensors and chiral catalysis, among others.
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Affiliation(s)
- Seunghoon Lee
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
- Department of Chemistry, Dong-A University, Busan, 49315, South Korea
- Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea)
| | - Chenghao Fan
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
| | - Artur Movsesyan
- Department of Physics and Astronomy, Ohio University, Athens, Ohio, 45701, United States
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China
| | - Johannes Bürger
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
| | - Fedja J Wendisch
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
| | - Leonardo de S Menezes
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901, Recife-PE, Brazil
- Faculty of Physics and Center for Nanoscience, Ludwig-Maximilians-University München, 80539, München, Germany
| | - Stefan A Maier
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
- School of Physics and Astronomy, Monash University, Clayton, Victoria, 3800, Australia
- The Blackett Laboratory, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Haoran Ren
- School of Physics and Astronomy, Monash University, Clayton, Victoria, 3800, Australia
| | - Tim Liedl
- Department of Physics and Center for NanoScience, Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799, München, Germany
| | | | - Alexander O Govorov
- Department of Physics and Astronomy, Ohio University, Athens, Ohio, 45701, United States
- Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, Ohio, 45701, United States
| | - Emiliano Cortés
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539, München, Germany
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3
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Song J, Ji CY, Ma X, Li J, Zhao W, Wang RY. Key Role of Asymmetric Photothermal Effect in Selectively Chiral Switching of Plasmonic Dimer Driven by Circularly Polarized Light. J Phys Chem Lett 2024; 15:975-982. [PMID: 38252465 DOI: 10.1021/acs.jpclett.3c03387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Strong interaction between circularly polarized light and chiral plasmonic nanostructures can enable controllable asymmetric photophysical processes, such as selective chiral switching of a plasmonic nanorod-dimer. Here, we uncover the underlying physics that governs this chiral switching by theoretically investigating the interplay between asymmetric photothermal and optomechanical effects. We find that the photothermally induced local temperature rises could play a key role in activating the dynamic chiral configurations of a plasmonic dimer due to the temperature-sensitive molecular linkages located at the gap region. Importantly, different temperature rises caused by the opposite handedness of light could facilitate selective chiral switching of the plasmonic dimer driven by asymmetric optical torques. Our analyses on the wavelength-dependent selectively chiral switching behaviors are in good agreement with the experimental observations. This work contributes to a comprehensive understanding of the physical mechanism involved in the experimentally designed photoresponsive plasmonic nanosystems for practical applications.
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Affiliation(s)
- Jian Song
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Chang-Yin Ji
- Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, and School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Xiaoyun Ma
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Jiafang Li
- Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems, and School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Wenjing Zhao
- College of Math and Physics, Beijing University of Chemical Technology, Beijing 100029, China
| | - Rong-Yao Wang
- School of Physics, Beijing Institute of Technology, Beijing 100081, China
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4
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Li F, Sun Y, Sun X, Hu Y. Self-assembled bamboo-like carbon nanotubes based on chiral H 8BINOL sensors to recognize cinchonidine efficiently by diastereoisomer complexes. RSC Adv 2024; 14:1134-1140. [PMID: 38174240 PMCID: PMC10759310 DOI: 10.1039/d3ra08143e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 12/19/2023] [Indexed: 01/05/2024] Open
Abstract
Fluorescence recognition for the antimalarial cinchonidine could be achieved efficiently and rapidly through bamboo-like carbon nanotubes based on chiral conjugated H8BINOL derivatives. Herein, it was proved that the chiral fluorescence probe H8BINOL exhibited excellent fluorescence identification ability for cinchonidine. The structure and size of the S-1 (S-(3,3'-phenyl)-5,5'6,6',7',8,8'-octahydro-[1,1'-dinaphthalene]-2,2'-diol) and R-1 (R-(3,3'-phenyl)-5,5'6,6',7',8,8'-octahydro-[1,1'-dinaphthalene]-2,2'-diol) were studied by using the DLS, TEM, and SEM spectra, which exhibited a self-assembled bamboo-like carbon nanotube structure. In the CD (circular dichroism) test, cinchonidine was added to a pair of enantiomers of H8BINOL derivatives. The different configurations of H8BINOL derivatives showed significantly different Cotton effects for cinchonidine, indicating that cinchonidine formed diastereoisomer π-π complexes with different configurations of H8BINOL derivatives. From the AFM tests, it was revealed that cinchonidine could effectively quench the fluorescent spot of the probes quickly. The fluorescence titration tests demonstrated that 6.4 × 10-7 mol of cinchonidine could completely quench the fluorescence sensor of S-1 (2 × 10-5 M, 2 mL) through the formation of a 1 : 1 complex. The limit of detection (LOD) of S-1 was calculated to be 6.08 × 10-10, which indicates that S-1 has a high sensitivity and can be applied effectively to the practice of identifying cinchonidine. Meanwhile, the fluorescence sensor R-1 also exhibited the same sensibility with a low limit of detection (7.60 × 10-10).
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Affiliation(s)
- Fangxiu Li
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 China
| | - Yue Sun
- College of Chemistry, Nanchang University Nanchang China
| | - Xiaoxia Sun
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 China
| | - Yu Hu
- College of Chemistry, Nanchang University Nanchang China
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5
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Steves M, Knappenberger KL. Distinguishing Single-Metal Nanoparticles with Subdiffraction Spatial Resolution Using Variable-Polarization Fourier Transform Nonlinear Optical Microscopy. CHEMICAL & BIOMEDICAL IMAGING 2023; 1:91-98. [PMID: 37122832 PMCID: PMC10131489 DOI: 10.1021/cbmi.3c00008] [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: 01/09/2023] [Revised: 02/09/2023] [Accepted: 02/14/2023] [Indexed: 05/02/2023]
Abstract
The development and use of interferometric variable-polarization Fourier transform nonlinear optical (vpFT-NLO) imaging to distinguish colloidal nanoparticles colocated within the optical diffraction limit is described. Using a collinear train of phase-stabilized pulse pairs with orthogonal electric field vectors, the polarization of nonlinear excitation fields are controllably modulated between linear, circular, and various elliptical states. Polarization modulation is achieved by precise control over the time delay separating the orthogonal pulse pairs to within hundreds of attoseconds. The resultant emission from gold nanorods is imaged to a 2D array detector and correlated to the excitation field polarization and plasmon resonance frequency by Fourier transformation. Gold nanorods with length-to-diameter aspect ratios of 2 support a longitudinal surface plasmon resonance at approximately 800 nm, which is resonant with the excitation fundamental carrier wavelength. Differences in the intrinsic linear and circular dichroism resulting from variation in their relative alignment with respect to the laboratory frame enable optical differentiation of nanorods separated within 50 nm, which is an approximate 5-fold improvement over the diffraction limit of the microscope. The experimental results are supported by analytical simulations. In addition to subdiffraction spatial resolution, the vpFT-NLO method intrinsically provides the polarization- and frequency-dependent resonance response of the nanoparticles-providing spectroscopic information content along with super-resolution imaging capabilities.
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Affiliation(s)
| | - Kenneth L. Knappenberger
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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6
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Wang Y, Adhikari S, van der Meer H, Liu J, Orrit M. Thousand-Fold Enhancement of Photothermal Signals in Near-Critical CO 2. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:3619-3625. [PMID: 36865992 PMCID: PMC9969513 DOI: 10.1021/acs.jpcc.2c08575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Photothermal (PT) microscopy has shown strong promise in imaging single absorbing nano-objects in soft matter and biological systems. PT imaging at ambient conditions usually requires a high laser power for a sensitive detection, which prevents application to light-sensitive nanoparticles. In a previous study of single gold nanoparticles, we showed that the photothermal signal can be enhanced more than 1000-fold in near-critical xenon compared to that in glycerol, a typical medium for PT detection. In this report, we show that carbon dioxide (CO2), a much cheaper gas than xenon, can enhance PT signals in a similar way. We confine near-critical CO2 in a thin capillary which easily withstands the high near-critical pressure (around 74 bar) and facilitates sample preparation. We also demonstrate enhancement of the magnetic circular dichroism signal of single magnetite nanoparticle clusters in supercritical CO2. We have performed COMSOL simulations to support and explain our experimental findings.
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Affiliation(s)
- Yonghui Wang
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University; 2300 RA Leiden, The Netherlands
- School
of Mechatronics Engineering, Harbin Institute
of Technology; Harbin 150001, P. R. China
| | - Subhasis Adhikari
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University; 2300 RA Leiden, The Netherlands
| | - Harmen van der Meer
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University; 2300 RA Leiden, The Netherlands
| | - Junyan Liu
- School
of Mechatronics Engineering, Harbin Institute
of Technology; Harbin 150001, P. R. China
| | - Michel Orrit
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University; 2300 RA Leiden, The Netherlands
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7
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Spaeth P, Adhikari S, Heyvaert W, Zhuo X, García I, Liz-Marzán LM, Bals S, Orrit M, Albrecht W. Photothermal Circular Dichroism Measurements of Single Chiral Gold Nanoparticles Correlated with Electron Tomography. ACS PHOTONICS 2022; 9:3995-4004. [PMID: 36573165 PMCID: PMC9783064 DOI: 10.1021/acsphotonics.2c01457] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Indexed: 06/17/2023]
Abstract
Chemically synthesized metal nanoparticles with morphological chiral features are known to exhibit strong circular dichroism. However, we still lack understanding of the correlation between morphological and chiroptical features of plasmonic nanoparticles. To shed light on that question, single nanoparticle experiments are required. We performed photothermal circular dichroism measurements of single chiral and achiral gold nanoparticles and correlated the chiroptical response to the 3D morphology of the same nanoparticles retrieved by electron tomography. In contrast to an ensemble measurement, we show that individual particles within the ensemble display a broad distribution of strength and handedness of circular dichroism signals. Whereas obvious structural chiral features, such as helical wrinkles, translate into chiroptical ones, nanoparticles with less obvious chiral morphological features can also display strong circular dichroism signals. Interestingly, we find that even seemingly achiral nanoparticles can display large g-factors. The origin of this circular dichroism signal is discussed in terms of plasmonics and other potentially relevant factors.
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Affiliation(s)
- Patrick Spaeth
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300Leiden, RA, The Netherlands
- Department
of Sustainable Energy Materials, AMOLF, Science Park 104, 1098Amsterdam, XG, The Netherlands
| | - Subhasis Adhikari
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300Leiden, RA, The Netherlands
| | - Wouter Heyvaert
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan
171, B-2020Antwerp, Belgium
| | - Xiaolu Zhuo
- Basque
Research and Technology Alliance (BRTA), CIC biomaGUNE, Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
- School
of Science Engineering, The Chinese University
of Hong Kong (Shenzhen), Shenzhen518172, China
| | - Isabel García
- Basque
Research and Technology Alliance (BRTA), CIC biomaGUNE, Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
| | - Luis M. Liz-Marzán
- Basque
Research and Technology Alliance (BRTA), CIC biomaGUNE, Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
- Ikerbasque
(Basque Foundation for Science), 48009Bilbao, Spain
| | - Sara Bals
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan
171, B-2020Antwerp, Belgium
| | - Michel Orrit
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300Leiden, RA, The Netherlands
| | - Wiebke Albrecht
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300Leiden, RA, The Netherlands
- Department
of Sustainable Energy Materials, AMOLF, Science Park 104, 1098Amsterdam, XG, The Netherlands
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan
171, B-2020Antwerp, Belgium
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8
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Adhikari S, Orrit M. Optically Probing the Chirality of Single Plasmonic Nanostructures and of Single Molecules: Potential and Obstacles. ACS PHOTONICS 2022; 9:3486-3497. [PMID: 36411819 PMCID: PMC9673138 DOI: 10.1021/acsphotonics.2c01205] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/07/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Circular dichroism (CD) is a standard method for the analysis of biomolecular conformation. It is very reliable when applied to molecules, but requires relatively large amounts of solution. Plasmonics offer the perspective of enhancement of CD signals, which would extend CD spectrometry to smaller amounts of molecules and to weaker chiral signals. However, plasmonic enhancement comes at the cost of additional complications: averaging over all orientations is no longer possible or reliable, linear dichroism leaks into CD signals because of experimental imperfections, scattering and its interference with the incident beam must be taken into account, and the interaction between chiral molecules and possibly chiral plasmonic structures considerably complicates the interpretation of measured signals. This Perspective aims to explore the motivations and problems of plasmonic chirality and to re-evaluate present and future solutions.
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9
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Dieperink M, Scalerandi F, Albrecht W. Correlating structure, morphology and properties of metal nanostructures by combining single-particle optical spectroscopy and electron microscopy. NANOSCALE 2022; 14:7460-7472. [PMID: 35481561 DOI: 10.1039/d1nr08130f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The nanoscale morphology of metal nanostructures directly defines their optical, catalytic and electronic properties and even small morphological changes can cause significant property variations. On the one hand, this dependence allows for precisely tuning and exploring properties by shape engineering; next to advanced synthesis protocols, post-synthesis modification through tailored laser modification has become an emerging tool to do so. On the other hand, with this interconnection also comes the quest for detailed structure-property correlation and understanding of laser-induced reshaping processes on the individual nanostructure level beyond ensemble averages. With the development of single-particle (ultrafast) optical spectroscopy techniques and advanced electron microscopy such understanding can in principle be gained at the femtosecond temporal and atomic spatial scale, respectively. However, accessing both on the same individual nanostructure is far from straightforward as it requires the combination of optical spectroscopy and electron microscopy. In this Minireview, we highlight key studies from recent years that performed such correlative measurements on the same individual metal nanostructure either in a consecutive ex situ manner or in situ inside the electron microscope. We demonstrate that such a detailed correlation is critical for revealing the full picture of the structure-property relationship and the physics behind light-induced nanostructure modifications. We put emphasis on the advantages and disadvantages of each methodology as well as on the unique information that one can gain only by correlative studies performed on the same individual nanostructure and end with an outlook on possible further development of this field in the near future.
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Affiliation(s)
- Mees Dieperink
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Francesca Scalerandi
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Wiebke Albrecht
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
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10
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Spaeth P, Adhikari S, Lahabi K, Baaske MD, Wang Y, Orrit M. Imaging the Magnetization of Single Magnetite Nanoparticle Clusters via Photothermal Circular Dichroism. NANO LETTERS 2022; 22:3645-3650. [PMID: 35420830 PMCID: PMC9101077 DOI: 10.1021/acs.nanolett.2c00178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/12/2022] [Indexed: 05/30/2023]
Abstract
Magnetic imaging is a versatile tool in biological and condensed-matter physics. Existing magnetic imaging techniques either require demanding experimental conditions which restrict the range of their applications or lack the spatial resolution required for single-particle measurements. Here, we combine photothermal (PT) microscopy with magnetic circular dichroism (MCD) to develop a versatile magnetic imaging technique using visible light. Unlike most magnetic imaging techniques, photothermal magnetic circular dichroism (PT MCD) microscopy works particularly well for single nanoparticles immersed in liquids. As a proof of principle, we demonstrate magnetic CD imaging of superparamagnetic magnetite nanoparticulate clusters immersed in microscope immersion oil. The sensitivity of our method allowed us to probe the magnetization curve of single ∼400-nm-diameter magnetite nanoparticulate clusters.
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Affiliation(s)
- Patrick Spaeth
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
| | - Subhasis Adhikari
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
| | - Kaveh Lahabi
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
| | - Martin Dieter Baaske
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
| | - Yonghui Wang
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
- School
of Mechatronics Engineering, Harbin Institute
of Technology, Harbin 150001, P. R. China
| | - Michel Orrit
- Huygens-Kamerlingh
Onnes Laboratory, Leiden University, 2300 RA Leiden, The Netherlands
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11
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Adhikari S, Orrit M. Progress and perspectives in single-molecule optical spectroscopy. J Chem Phys 2022; 156:160903. [PMID: 35489995 DOI: 10.1063/5.0087003] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We review some of the progress of single-molecule optical experiments in the past 20 years and propose some perspectives for the coming years. We particularly focus on methodological advances in fluorescence, super-resolution, photothermal contrast, and interferometric scattering and briefly discuss a few of the applications. These advances have enabled the exploration of new emitters and quantum optics; the chemistry and biology of complex heterogeneous systems, nanoparticles, and plasmonics; and the detection and study of non-fluorescing and non-absorbing nano-objects. We conclude by proposing some ideas for future experiments. The field will move toward more and better signals of a broader variety of objects and toward a sharper view of the surprising complexity of the nanoscale world of single (bio-)molecules, nanoparticles, and their nano-environments.
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Affiliation(s)
- Subhasis Adhikari
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2333 CA Leiden, The Netherlands
| | - Michel Orrit
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2333 CA Leiden, The Netherlands
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12
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Characterization of Chirality in Diffractive Metasurfaces by Photothermal Deflection Technique. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Chirality, a lack of mirror symmetry, is present in nature at all scales; at the nanoscale, it governs the biochemical reactions of many molecules, influencing their pharmacology and toxicity. Chiral substances interact with left and right circularly polarized light differently, but this difference is very minor in natural materials. Specially engineered, nanostructured, periodic materials can enhance the chiro-optical effects if the symmetry in their interactions with circular polarization is broken. In the diffraction range of such metasurfaces, the intensity of diffracted orders depends on the chirality of the input beam. In this work, we combine a photothermal deflection experiment with a novel theoretical framework to reconstruct both the thermal and optical behavior of chiro-optical behavior in diffracted beams.
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