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Baden N, Watanabe H, Aoyagi M, Ujii H, Fujita Y. Surface-enhanced optical-mid-infrared photothermal microscopy using shortened colloidal silver nanowires: a noble approach for mid-infrared surface sensing. NANOSCALE HORIZONS 2024. [PMID: 38808389 DOI: 10.1039/d4nh00106k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
We propose surface-enhanced optical-mid-infrared photothermal (MIP) microscopy using highly crystalline silver nanowires, acting as a Fabry-Perot resonator, and demonstrate its applicability to enhanced mid-infrared surface sensing of thin polymer layers as thin as 20 nm.
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Affiliation(s)
- Naoki Baden
- Nihon Thermal Consulting, Co., Ltd, 3-9-2 Nishishinjuku, Sinjuku-ku, Tokyo 160-0023, Japan
| | - Hirohmi Watanabe
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Kagamiyama 3-11-32, Higashihiroshima, Hiroshima, 739-0046, Japan.
| | - Masaru Aoyagi
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Kagamiyama 3-11-32, Higashihiroshima, Hiroshima, 739-0046, Japan.
| | - Hiroshi Ujii
- Research Institute for Electronic Science (RIES) and Division of Information Science and Technology, Graduate School of Information Science and Technology, Hokkaido University, N20W10, Sapporo, Hokkaido 001-0020, Japan
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yasuhiko Fujita
- Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Kagamiyama 3-11-32, Higashihiroshima, Hiroshima, 739-0046, Japan.
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2
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Chen Y, Zhou J, Xie X, Ma H, Zhang S, Xie Z, Min C, Zhang Y, Yuan X. Switchable rotation of metal nanostructures in an intensity chirality-invariant focus field. OPTICS LETTERS 2023; 48:6328-6331. [PMID: 38039259 DOI: 10.1364/ol.503217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/30/2023] [Indexed: 12/03/2023]
Abstract
Light-induced rotation is a fundamental motion form that is of great significance for flexible and multifunctional manipulation modes. However, current optical rotation by a single optical field is mostly unidirectional, where switchable rotation manipulation is still challenging. To address this issue, we demonstrate a switchable rotation of non-spherical nanostructures within a single optical focus field. Interestingly, the intensity of the focus field is chiral invariant. The rotation switch is a result of the energy flux reversal in front and behind the focal plane. We quantitatively analyze the optical force exerted on a metal nanorod at different planes, as well as the surrounding energy flux. Our experimental results indicate that the direct switchover of rotational motion is achievable by adjusting the relative position of the nanostructure to the focal plane. This result enriches the basic motion mode of micro-manipulation and is expected to create potential opportunities in many application fields, such as biological cytology and optical micromachining.
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3
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Nan F, Rodríguez-Fortuño FJ, Yan S, Kingsley-Smith JJ, Ng J, Yao B, Yan Z, Xu X. Creating tunable lateral optical forces through multipolar interplay in single nanowires. Nat Commun 2023; 14:6361. [PMID: 37821466 PMCID: PMC10567843 DOI: 10.1038/s41467-023-42076-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 09/25/2023] [Indexed: 10/13/2023] Open
Abstract
The concept of lateral optical force (LOF) is of general interest in optical manipulation as it releases the constraint of intensity gradient in tightly focused light, yet such a force is normally limited to exotic materials and/or complex light fields. Here, we report a general and controllable LOF in a nonchiral elongated nanoparticle illuminated by an obliquely incident plane wave. Through computational analysis, we reveal that the sign and magnitude of LOF can be tuned by multiple parameters of the particle (aspect ratio, material) and light (incident angle, direction of linear polarization, wavelength). The underlying physics is attributed to the multipolar interplay in the particle, leading to a reduction in symmetry. Direct experimental evidence of switchable LOF is captured by polarization-angle-controlled manipulation of single Ag nanowires using holographic optical tweezers. This work provides a minimalist paradigm to achieve interface-free LOF for optomechanical applications, such as optical sorting and light-driven micro/nanomotors.
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Affiliation(s)
- Fan Nan
- Guangdong Provincial Key Laboratory of Nanophotonics Manipulation, Institute of Nanophotonics, Jinan University, 511443, Guangzhou, China.
| | - Francisco J Rodríguez-Fortuño
- Department of Physics and London Centre for Nanotechnology, King's College London, Strand, London, WC2R 2LS, United Kingdom
| | - Shaohui Yan
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 710119, Xi'an, China.
| | - Jack J Kingsley-Smith
- Department of Physics and London Centre for Nanotechnology, King's College London, Strand, London, WC2R 2LS, United Kingdom
| | - Jack Ng
- Department of Physics, Southern University of Science and Technology, 518055, Shenzhen, Guangdong, China
| | - Baoli Yao
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 710119, Xi'an, China
| | - Zijie Yan
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599, USA
| | - Xiaohao Xu
- State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 710119, Xi'an, China.
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4
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Remembering Zijie Yan─A Master of Light and Matter, with Nanometer Precision. ACS NANO 2023; 17:17597-17599. [PMID: 37750205 DOI: 10.1021/acsnano.3c08506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
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5
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Achouri K, Chung M, Kiselev A, Martin OJF. Multipolar Pseudochirality-Induced Optical Torque. ACS PHOTONICS 2023; 10:3275-3282. [PMID: 37743946 PMCID: PMC10515695 DOI: 10.1021/acsphotonics.3c00696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Indexed: 09/26/2023]
Abstract
It has been observed that achiral nanoparticles, such as flat helices, may be subjected to an optical torque even when illuminated by normally incident linearly polarized light. However, the origin of this fascinating phenomenon has so far remained mostly unexplained. We therefore propose an exhaustive discussion that provides a clear and rigorous explanation for the existence of such a torque. Using multipolar theory and taking into account nonlocal interactions, we find that this torque stems from multipolar pseudochiral responses that generate both spin and orbital angular momenta. We also show that the nature of these peculiar responses makes them particularly dependent on the asymmetry of the particles. By elucidating the origin of this type of torque, this work may prove instrumental for the design of high-performance nano-rotors.
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Affiliation(s)
- Karim Achouri
- Nanophotonics and Metrology Laboratory, Institute of Electrical and Microengineering, École
Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland
| | - Mintae Chung
- Nanophotonics and Metrology Laboratory, Institute of Electrical and Microengineering, École
Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland
| | - Andrei Kiselev
- Nanophotonics and Metrology Laboratory, Institute of Electrical and Microengineering, École
Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland
| | - Olivier J. F. Martin
- Nanophotonics and Metrology Laboratory, Institute of Electrical and Microengineering, École
Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland
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6
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Fresno-Hernández A, Marqués MI. Opto-mechanically generated resonant field enhancement. Sci Rep 2022; 12:18292. [PMID: 36316389 PMCID: PMC9622864 DOI: 10.1038/s41598-022-22987-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023] Open
Abstract
A link between the resonant cumulative field enhancement experienced by a chain of plasmonic nanoparticles in a light field and the orientation of the chain with respect to the field is obtained. We calculate analytically the optical torque and the equilibrium configuration and we show how stable orientations are triggered by the geometric resonance conditions. Analytical predictions are checked using numerical calculations based on the coupled dipoles method (CDA) for the particular case of a chain of silver nanoparticles. The reported resonance driven optical torque allows for a tuning of the orientation of the chain depending on radiation's wavelength.
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Affiliation(s)
- Alicia Fresno-Hernández
- Grupo de Displays y Aplicaciones Fotónicas (GDAF), Universidad Carlos III de Madrid (UC3M), 28911, Leganés, Madrid, Spain.
| | - Manuel I Marqués
- Departamento Física de Materiales, IFIMAC and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid (UAM), Ciudad Universitaria de Cantoblanco, C. Francisco Tomás y Valiente, 7, 28049, Madrid, Spain.
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7
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Yamanishi J, Ahn HY, Yamane H, Hashiyada S, Ishihara H, Nam KT, Okamoto H. Optical gradient force on chiral particles. SCIENCE ADVANCES 2022; 8:eabq2604. [PMID: 36129977 PMCID: PMC9491721 DOI: 10.1126/sciadv.abq2604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
When a chiral nanoparticle is optically trapped using a circularly polarized laser beam, a circular polarization (CP)–dependent gradient force can be induced on the particle. We investigated the CP-dependent gradient force exerted on three-dimensional chiral nanoparticles. The experimental results showed that the gradient force depended on the handedness of the CP of the trapping light and the particle chirality. The analysis revealed that the spectral features of the CP handedness–dependent gradient force are influenced not only by the real part of the refractive index but also by the electromagnetic field perturbed by the chiral particle resonant with the incident light. This is in sharp contrast to the well-known behavior of the gradient force, which is governed by the real part of the refractive index. The extended aspect of the chiral optical force obtained here can provide novel methodologies on chirality sensing, manipulation, separation, enantioselective biological reactions, and other fields.
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Affiliation(s)
- Junsuke Yamanishi
- Institute for Molecular Science, National Institutes of Natural Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Hyo-Yong Ahn
- Institute for Molecular Science, National Institutes of Natural Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
- Center for Novel Science Initiatives, National Institutes of Natural Sciences, 4-3-13 Toranomon, Minato-ku, Tokyo 105-0001, Japan
| | - Hidemasa Yamane
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
- Department of Physics, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Shun Hashiyada
- Institute for Molecular Science, National Institutes of Natural Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
- Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Electrical, Electronic, and Communication Engineering, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Hajime Ishihara
- Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
- Department of Materials Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
- Center for Quantum Information and Quantum Biology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hiromi Okamoto
- Institute for Molecular Science, National Institutes of Natural Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
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8
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Zhang W, Lei H, Zhong L, Liu W, Li J, Qin Y. Manipulation of a Single Metal Nanowire by an Unpolarized Gaussian Beam. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29111-29119. [PMID: 35723431 DOI: 10.1021/acsami.2c05410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Optical manipulation of metal nanowires offers a promising route to building optoelectronic nanosystems, which remains a challenge because of their strong absorption or scattering properties. Here, precise optical manipulation of a single Ag nanowire, including capture, translation, rotation, immobilization, and release, was readily achieved within a large operation range of 100 μm by a single unpolarized Gaussian beam based on an optical scattering force. Besides, the optical forces and torques exerted on the Ag nanowires under different conditions were quantitatively analyzed and calculated by simulation to give insight into the manipulation mechanism. This proposed scattering-force-based optical manipulation method also has great position and orientation stability with a capture stiffness of 1.2 pN/μm and an orientation standard deviation of 0.3°. More surprisingly, it is independent of both laser polarization and the metal material, shape, and size and is a universal and promising strategy for the manipulation and assembly of nontransparent structures in mesoscopic/Mie sizes.
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Affiliation(s)
- Weina Zhang
- Guangdong Provincial Key Laboratory of Photonics Information Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Hongxiang Lei
- School of Materials Science and Engineering, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
| | - Liyun Zhong
- Guangdong Provincial Key Laboratory of Photonics Information Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Wenjie Liu
- Guangdong Provincial Key Laboratory of Photonics Information Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Juan Li
- Institute of Nanophotonics, Jinan University, Guangzhou, 511443, China
| | - Yuwen Qin
- Guangdong Provincial Key Laboratory of Photonics Information Technology, School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
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9
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Chen Z, Cai Z, Liu W, Yan Z. Optical trapping and manipulation for single-particle spectroscopy and microscopy. J Chem Phys 2022; 157:050901. [DOI: 10.1063/5.0086328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Optical tweezers can control the position and orientation of individual colloidal particles in solution. Such control is often desirable but challenging for single-particle spectroscopy and microscopy, especially at the nanoscale. Functional nanoparticles that are optically trapped and manipulated in a three-dimensional (3D) space can serve as freestanding nanoprobes, which provide unique prospects of sensing and mapping the surrounding environment of the nanoparticles and studying their interactions with biological systems. In this perspective, we will first describe the optical forces underlying the optical trapping and manipulation of microscopic particles, then review the combinations and applications of different spectroscopy and microscopy techniques with optical tweezers. Finally, we will discuss the challenges of performing spectroscopy and microscopy on single nanoparticles with optical tweezers, the possible routes to address these challenges, and the new opportunities that will arise.
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Affiliation(s)
- Zhenzhen Chen
- The University of North Carolina at Chapel Hill, United States of America
| | - Zhewei Cai
- Clarkson University, United States of America
| | - Wenbo Liu
- The University of North Carolina at Chapel Hill, United States of America
| | - Zijie Yan
- University of North Carolina at Chapel Hill, United States of America
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10
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Jani R, Das SC, Zahura F, Islam H, Al-Quaderi GD, Mahdy MRC. Plasmonic octamer objects: reversal of near-field optical binding force without the aid of backgrounds. APPLIED OPTICS 2021; 60:10124-10131. [PMID: 34807119 DOI: 10.1364/ao.435982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
In recent years, the near-field optical binding force has gained a lot of interest in the field of optical manipulation. The reversal of the near-field binding force, a new, to the best of our knowledge, kind of optical manipulation, has so far been investigated mostly between dimers and in a very few cases among tetramers by utilizing the help of suitable substrates or backgrounds. Until now, no known way to control the near-field optical binding force among octamer configurations has been found, to our knowledge. In this paper, we propose a plasmonic (silver) octamer configuration where we demonstrate the control and reversal (attraction and repulsion) of the near-field optical binding force of octamers by illuminating the system with a TM polarized Bessel beam. The control of the binding force and its reversal is explained based on the polarization and gradient forces created by the Bessel beam. As the aid of a background or substrate is not required, our proposed simplified approach has the potential to open up novel ways of manipulating multiple particles. Our investigation also implicitly suggests that for future research on controlling the reversal of the near-field optical binding force of multiple particles, Bessel beams can be the appropriate choice instead of plane waves.
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11
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Wang Y, Hu H, Tang J, Meng S, Xu H, Ding T. Plasmon-Directed On-Wire Growth of Branched Silver Nanowires with Chiroptic Activity. ACS NANO 2021; 15:16404-16410. [PMID: 34558905 DOI: 10.1021/acsnano.1c05796] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Silver nanowires (Ag NWs) present prominent waveguiding properties of subwavelength light due to their nanoconfinement with propagating surface plasmons, which is of great importance for on-chip integration of nanophotonic devices and optical computation. Such propagating plasmons also exert plasmonic forces, which can be utilized to manipulate nanoparticles (NPs) beyond the diffraction limit. However, such controllability is spatially limited to the near fields, whereas a large portion of uncontrolled particles are randomly deposited on the chips, which could be detrimental to the integrated optical devices. Herein we shine continuous wave laser at one end of the Ag NW immersed in AgNO3 solution to launch the propagating surface plasmons. The laser irradiation also induces the photoreduction of Ag+ ions to locally generate tiny Ag NPs, which evolve into large Ag flake branches closer to the other end of the Ag NW. Such a peculiar growth is due to the synergistic effect of plasmonic forces and the thermophoretic/thermo-osmosis forces induced by temperature gradient. These branched Ag NWs with sharp angles are intrinsically chiral, which can be partially controlled by changing the irradiation location, forming plasmonic chiral enantiomers. The circular differential scattering (CDS) response of these branched Ag NWs can be as large as 40%, which can be used for chiral enantiomer sensing with spectral dissymmetric factor up to 4 nm induced by phenylalanine. This plasmon-directed on-wire growth not only offers a facile approach for generating plasmonic chiral nanostructures with remote controllability, but also provides significant insights on the synergistic effect of plasmonic forces and thermal-induced forces, which has great implications for self-assembly and integration of on-chip optics.
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Affiliation(s)
- Yunxia Wang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Huatian Hu
- The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Jibo Tang
- The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Shuang Meng
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China
| | - Hongxing Xu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China
- The Institute for Advanced Studies, 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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12
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Nan F, Yan Z. Synergy of Intensity, Phase, and Polarization Enables Versatile Optical Nanomanipulation. NANO LETTERS 2020; 20:2778-2783. [PMID: 32134670 DOI: 10.1021/acs.nanolett.0c00443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Micromanipulation by optical tweezers mainly relies on the trapping force derived from the intensity gradient of light. Here we show that the synergy of intensity, phase, and polarization in structured light allows versatile optical manipulation of nanostructures. When a metal nanoparticle is confined by a linearly polarized laser field, the sign of optical force depends on the particle shape and the laser intensity, phase, and polarization profiles. By tuning these parameters in optical line traps, optical trapping, transporting, and sorting of silver nanostructures have been demonstrated. These findings inspired us to control the motion of nanostructures with designed intensity, phase, and polarization of light using holographic optical tweezers with advanced beam shaping techniques. This work provides a new perspective on active colloidal nanomanipulation in fully controlled optical landscapes, which largely expands the existing optical manipulation toolbox.
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Affiliation(s)
- Fan Nan
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Zijie Yan
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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13
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Hogan LT, Horak EH, Ward JM, Knapper KA, Nic Chormaic S, Goldsmith RH. Toward Real-Time Monitoring and Control of Single Nanoparticle Properties with a Microbubble Resonator Spectrometer. ACS NANO 2019; 13:12743-12757. [PMID: 31614083 PMCID: PMC6887843 DOI: 10.1021/acsnano.9b04702] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 10/15/2019] [Indexed: 05/22/2023]
Abstract
Optical microresonators have widespread application at the frontiers of nanophotonic technology, driven by their ability to confine light to the nanoscale and enhance light-matter interactions. Microresonators form the heart of a recently developed method for single-particle photothermal absorption spectroscopy, whereby the microresonators act as microscale thermometers to detect the heat dissipated by optically pumped, nonluminescent nanoscopic targets. However, translation of this technology to chemically dynamic systems requires a platform that is mechanically stable, solution compatible, and visibly transparent. We report microbubble absorption spectrometers as a versatile platform that meets these requirements. Microbubbles integrate a two-port microfluidic device within a whispering gallery mode microresonator, allowing for the facile exchange of chemical reagents within the resonator's interior while maintaining a solution-free environment on its exterior. We first leverage these qualities to investigate the photoactivated etching of single gold nanorods by ferric chloride, providing a method for rapid acquisition of spatial and morphological information about nanoparticles as they undergo chemical reactions. We then demonstrate the ability to control nanorod orientation within a microbubble through optically exerted torque, a promising route toward the construction of hybrid photonic-plasmonic systems. Critically, the reported platform advances microresonator spectrometer technology by permitting room-temperature, aqueous experimental conditions, which may be used for time-resolved single-particle experiments on non-emissive, nanoscale analytes engaged in catalytically and biologically relevant chemical dynamics.
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Affiliation(s)
- Levi T. Hogan
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Erik H. Horak
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Jonathan M. Ward
- Light-Matter
Interactions for Quantum Technologies Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Kassandra A. Knapper
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Síle Nic Chormaic
- Light-Matter
Interactions for Quantum Technologies Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Randall H. Goldsmith
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- E-mail:
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14
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Zhao C, Shah PJ, Bissell LJ. Laser additive nano-manufacturing under ambient conditions. NANOSCALE 2019; 11:16187-16199. [PMID: 31461093 DOI: 10.1039/c9nr05350f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Additive manufacturing at the macroscale has become a hot topic of research in recent years. It has been used by engineers for rapid prototyping and low-volume production. The development of such technologies at the nanoscale, or additive nanomanufacturing, will provide a future path for new nanotechnology applications. In this review article, we introduce several available toolboxes that can be potentially used for additive nanomanufacturing. We especially focus on laser-based additive nanomanufacturing under ambient conditions.
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Affiliation(s)
- Chenglong Zhao
- Department of Physics, University of Dayton, 300 College Park, Dayton, Ohio 45469-2314, USA. and Department of Electro-Optics and Photonics, University of Dayton, 300 College Park, Dayton, Ohio 45469-2314, USA
| | - Piyush J Shah
- Department of Electro-Optics and Photonics, University of Dayton, 300 College Park, Dayton, Ohio 45469-2314, USA and Materials and Manufacturing Directorate, Air Force Research Laboratory, 2179 12th St, Wright-Patterson AFB, Ohio 45433-7718, USA.
| | - Luke J Bissell
- Materials and Manufacturing Directorate, Air Force Research Laboratory, 2179 12th St, Wright-Patterson AFB, Ohio 45433-7718, USA.
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15
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Glier TE, Akinsinde L, Paufler M, Otto F, Hashemi M, Grote L, Daams L, Neuber G, Grimm-Lebsanft B, Biebl F, Rukser D, Lippmann M, Ohm W, Schwartzkopf M, Brett CJ, Matsuyama T, Roth SV, Rübhausen M. Functional Printing of Conductive Silver-Nanowire Photopolymer Composites. Sci Rep 2019; 9:6465. [PMID: 31015552 PMCID: PMC6478917 DOI: 10.1038/s41598-019-42841-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 04/08/2019] [Indexed: 11/09/2022] Open
Abstract
We investigated the fabrication and functional behaviour of conductive silver-nanowire-polymer composites for prospective use in printing applications. Silver-nanowires with an aspect ratio of up to 1000 were synthesized using the polyol route and embedded in a UV-curable and printable polymer matrix. Sheet resistances in the composites down to 13 Ω/sq at an optical transmission of about 90% were accomplished. The silver-nanowire composite morphology and network structure was investigated by electron microscopy, atomic force microscopy, profilometry, ellipsometry as well as surface sensitive X-ray scattering. By implementing different printing applications, we demonstrate that our silver nanowires can be used in different polymer composites. On the one hand, we used a tough composite for a 2D-printed film as top contact on a solar cell. On the other hand, a flexible composite was applied for a 3D-printed flexible capacitor.
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Affiliation(s)
- Tomke E Glier
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany.
| | - Lewis Akinsinde
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Malwin Paufler
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Ferdinand Otto
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Maryam Hashemi
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Lukas Grote
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Lukas Daams
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Gerd Neuber
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Benjamin Grimm-Lebsanft
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Florian Biebl
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Dieter Rukser
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
| | | | - Wiebke Ohm
- DESY, Notkestrasse 85, 22607, Hamburg, Germany
| | | | - Calvin J Brett
- DESY, Notkestrasse 85, 22607, Hamburg, Germany
- Department of Mechanics, KTH Royal Institute of Technology, Teknikringen 8, 100 44, Stockholm, Sweden
- Wallenberg Wood Science Center, Teknikringen 56-58, 100 44, Stockholm, Sweden
| | - Toru Matsuyama
- Max-Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Stephan V Roth
- DESY, Notkestrasse 85, 22607, Hamburg, Germany.
- Department of Fiber and Polymertechnology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44, Stockholm, Sweden.
| | - Michael Rübhausen
- Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany.
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16
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Peng X, Lin L, Hill EH, Kunal P, Humphrey SM, Zheng Y. Optothermophoretic Manipulation of Colloidal Particles in Nonionic Liquids. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2018; 122:24226-24234. [PMID: 30766650 PMCID: PMC6369910 DOI: 10.1021/acs.jpcc.8b03828] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The response of colloidal particles to a light-controlled external temperature field can be harnessed for opto-thermophoretic manipulation of the particles. The thermoelectric effect is regarded as the driving force for thermophoretic trapping of particles at the light-irradiated hot region, which is thus limited to ionic liquids. Herein, we achieve opto-thermophoretic manipulation of colloidal particles in various non-ionic liquids, including water, ethanol, isopropyl alcohol and 1-butanol, and establish the physical mechanism of the manipulation at the molecular level. We reveal that the non-ionic driving force originates from a layered structure of solvent molecules at the particle-solvent interface, which is supported by molecular dynamics simulations. Furthermore, the effects of hydrophilicity, solvent type, and ionic strength on the layered interfacial structures and thus the trapping stability of particles are investigated, providing molecular-level insight into thermophoresis and guidance on interfacial engineering for optothermal manipulation.
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Affiliation(s)
- Xiaolei Peng
- Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - Linhan Lin
- Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Eric H. Hill
- Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Pranaw Kunal
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA
| | - Simon M. Humphrey
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA
| | - Yuebing Zheng
- Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- Corresponding Author:
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17
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Ji H, Trevino J, Tu R, Knapp E, McQuade J, Yurkiv V, Mashayek F, Vuong LT. Long-Range Self-Assembly via the Mutual Lorentz Force of Plasmon Radiation. NANO LETTERS 2018; 18:2564-2570. [PMID: 29584938 DOI: 10.1021/acs.nanolett.8b00269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Long-range interactions often proceed as a sequence of hopping through intermediate, statistically favored events. Here, we demonstrate predictable mechanical dynamics of particles that arise from the Lorentz force between plasmons. Even if the radiation is weak, the nonconservative Lorentz force produces stable locations perpendicular to the plasmon oscillation; over time, distinct patterns emerge. Experimentally, linearly polarized light illumination leads to the formation of 80 nm diameter Au nanoparticle chains, perpendicularly aligned, with lengths that are orders of magnitude greater than their plasmon near-field interaction. There is a critical intensity threshold and optimal concentration for observing self-assembly.
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Affiliation(s)
- Haojie Ji
- Department of Physics , Queens College of the City University of New York , Flushing , New York 11367 , United States
| | - Jacob Trevino
- Department of Physics , The Graduate Center of the City University of New York , New York , New York 10016 , United States
- Department of Chemistry , The Graduate Center of the City University of New York , New York , New York 10016 , United States
- Advanced Science Research Center of the Graduate Center at the City University of New York , New York , New York 10031 , United States
| | - Raymond Tu
- Advanced Science Research Center of the Graduate Center at the City University of New York , New York , New York 10031 , United States
- Department of Chemical Engineering , City College of New York , New York , New York 10031 , United States
| | - Ellen Knapp
- Department of Chemical Engineering , City College of New York , New York , New York 10031 , United States
| | - James McQuade
- Department of Physics , Queens College of the City University of New York , Flushing , New York 11367 , United States
| | - Vitaliy Yurkiv
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Farzad Mashayek
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , Chicago , Illinois 60607 , United States
| | - Luat T Vuong
- Department of Physics , Queens College of the City University of New York , Flushing , New York 11367 , United States
- Department of Physics , The Graduate Center of the City University of New York , New York , New York 10016 , United States
- Advanced Science Research Center of the Graduate Center at the City University of New York , New York , New York 10031 , United States
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18
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Sule N, Yifat Y, Gray SK, Scherer NF. Rotation and Negative Torque in Electrodynamically Bound Nanoparticle Dimers. NANO LETTERS 2017; 17:6548-6556. [PMID: 28961013 DOI: 10.1021/acs.nanolett.7b02196] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We examine the formation and concomitant rotation of electrodynamically bound dimers (EBD) of 150 nm diameter Ag nanoparticles trapped in circularly polarized focused Gaussian beams. The rotation frequency of an EBD increases linearly with the incident beam power, reaching mean values of ∼4 kHz for relatively low incident powers of 14 mW. Using a coupled-dipole/effective polarizability model, we reveal that retardation of the scattered fields and electrodynamic interactions can lead to a "negative torque" causing rotation of the EBD in the direction opposite to that of the circular polarization. This intriguing opposite-handed rotation due to negative torque is clearly demonstrated using electrodynamics-Langevin dynamics simulations by changing particle separations and thus varying the retardation effects. Finally, negative torque is also demonstrated in experiments from statistical analysis of the EBD trajectories. These results demonstrate novel rotational dynamics of nanoparticles in optical matter using circular polarization and open a new avenue to control orientational dynamics through coupling to interparticle separation.
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Affiliation(s)
- Nishant Sule
- James Franck Institute, The University of Chicago , 929 E. 57th Street, Chicago, Illinois 60637, United States
| | - Yuval Yifat
- James Franck Institute, The University of Chicago , 929 E. 57th Street, Chicago, Illinois 60637, United States
| | - Stephen K Gray
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Norbert F Scherer
- James Franck Institute, The University of Chicago , 929 E. 57th Street, Chicago, Illinois 60637, United States
- Department of Chemistry, The University of Chicago , 929 East 57th Street, Chicago, Illinois 60637, United States
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19
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Kim K, Guo J, Liang ZX, Zhu FQ, Fan DL. Man-made rotary nanomotors: a review of recent developments. NANOSCALE 2016; 8:10471-90. [PMID: 27152885 PMCID: PMC4873439 DOI: 10.1039/c5nr08768f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The development of rotary nanomotors is an essential step towards intelligent nanomachines and nanorobots. In this article, we review the concept, design, working mechanisms, and applications of state-of-the-art rotary nanomotors made from synthetic nanoentities. The rotary nanomotors are categorized according to the energy sources employed to drive the rotary motion, including biochemical, optical, magnetic, and electric fields. The unique advantages and limitations for each type of rotary nanomachines are discussed. The advances of rotary nanomotors is pivotal for realizing dream nanomachines for myriad applications including microfluidics, biodiagnosis, nano-surgery, and biosubstance delivery.
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Affiliation(s)
- Kwanoh Kim
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Jianhe Guo
- Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - Z X Liang
- Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - F Q Zhu
- NovaMinds, LLC, 9535 Ketona Cv., Austin, TX 78759, USA
| | - D L Fan
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA. and Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, TX 78712, USA
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20
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Zhang L, Dou X, Min C, Zhang Y, Du L, Xie Z, Shen J, Zeng Y, Yuan X. In-plane trapping and manipulation of ZnO nanowires by a hybrid plasmonic field. NANOSCALE 2016; 8:9756-63. [PMID: 27117313 DOI: 10.1039/c5nr08940a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In general, when a semiconductor nanowire is trapped by conventional laser beam tweezers, it tends to be aligned with the trapping beam axis rather than confined in the horizontal plane, and this limits the application of these nanowires in many in-plane nanoscale optoelectronic devices. In this work, we achieve the in-plane trapping and manipulation of a single ZnO nanowire by a hybrid plasmonic tweezer system on a flat metal surface. The gap between the nanowire and the metallic substrate leads to an enhanced gradient force caused by deep subwavelength optical energy confinement. As a result, the nanowire can be securely trapped in-plane at the center of the excited surface plasmon polariton field, and can also be dynamically moved and rotated by varying the position and polarization direction of the incident laser beam, which cannot be performed using conventional optical tweezers. The theoretical results show that the focused plasmonic field induces a strong in-plane trapping force and a high rotational torque on the nanowire, while the focused optical field produces a vertical trapping force to produce the upright alignment of the nanowire; this is in good agreement with the experimental results. Finally, some typical ZnO nanowire structures are built based on this technique, which thus further confirms the potential of this method for precise manipulation of components during the production of nanoelectronic and nanophotonic devices.
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Affiliation(s)
- Lichao Zhang
- Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, Guangdong, China.
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21
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Xu X, Cheng C, Zhang Y, Lei H, Li B. Scattering and Extinction Torques: How Plasmon Resonances Affect the Orientation Behavior of a Nanorod in Linearly Polarized Light. J Phys Chem Lett 2016; 7:314-319. [PMID: 26720710 DOI: 10.1021/acs.jpclett.5b02375] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Linearly polarized light can exert an orienting torque on plasmonic nanorods. The torque direction has generally been considered to change when the light wavelength passes through a plasmon longitudinal resonance. Here, we use the Maxwell stress tensor to evaluate this torque in general terms. According to distinct light-matter interaction processes, the total torque is decomposed into scattering and extinction torques. The scattering torque tends to orient plasmonic nanorods parallel to the light polarization, independent of the choice of light wavelength. The direction of the extinction torque is not only closely tied to the excitation of plasmon resonance but also depends on the specific plasmon mode around which the light wavelength is tuned. Our findings show that the conventional wisdom that simply associates the total torque with the plasmon longitudinal resonances needs to be replaced with an understanding based on the different torque components and the details of spectral distribution.
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Affiliation(s)
- Xiaohao Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University , Guangzhou 510275, China
| | - Chang Cheng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University , Guangzhou 510275, China
| | - Yao Zhang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University , Guangzhou 510275, China
| | - Hongxiang Lei
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University , Guangzhou 510275, China
| | - Baojun Li
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University , Guangzhou 510275, China
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22
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José Andrés L, Fe Menéndez M, Gómez D, Luisa Martínez A, Bristow N, Paul Kettle J, Menéndez A, Ruiz B. Rapid synthesis of ultra-long silver nanowires for tailor-made transparent conductive electrodes: proof of concept in organic solar cells. NANOTECHNOLOGY 2015; 26:265201. [PMID: 26056864 DOI: 10.1088/0957-4484/26/26/265201] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Rapid synthesis of ultralong silver nanowires (AgNWs) has been obtained using a one-pot polyol-mediated synthetic procedure. The AgNWs have been prepared from the base materials in less than one hour with nanowire lengths reaching 195 μm, which represents the quickest synthesis and one of the highest reported aspect ratios to date. These results have been achieved through a joint analysis of all reaction parameters, which represents a clear progress beyond the state of the art. Dispersions of the AgNWs have been used to prepare thin, flexible, transparent and conducting films using spray coating. Due to the higher aspect ratio, an improved electrical percolation network is observed. This allows a low sheet resistance (RS = 20.2 Ω/sq), whilst maintaining high optical film transparency (T = 94.7%), driving to the highest reported figure-of-merit (FoM = 338). Owing to the light-scattering influence of the AgNWs, the density of the AgNW network can also be varied to enable controllability of the optical haze through the sample. Based on the identification of the optimal haze value, organic photovoltaics (OPVs) have been fabricated using the AgNWs as the transparent electrode and have been benchmarked against indium tin oxide (ITO) electrodes. Overall, the performance of OPVs made using AgNWs sees a small decrease in power conversion efficiency (PCE), primarily due to a fall in open-circuit voltage (50 mV). This work indicates that AgNWs can provide a low cost, rapid and roll-to-roll compatible alternative to ITO in OPVs, with only a small compromise in PCE needed.
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Affiliation(s)
- Luis José Andrés
- Energy Area, ITMA Materials Technology, C/ Calafates L3.4, Avilés, Spain
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23
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Zhang Y, Wang J, Shen J, Man Z, Shi W, Min C, Yuan G, Zhu S, Urbach HP, Yuan X. Plasmonic hybridization induced trapping and manipulation of a single Au nanowire on a metallic surface. NANO LETTERS 2014; 14:6430-6. [PMID: 25302534 DOI: 10.1021/nl502975k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Hybridization in the narrow gaps between the surface plasmon polaritons (SPPs) along a metal surface and the localized surface plasmons on metallic nano-objects strongly enhance the electromagnetic field. Here, we employ plasmonic hybridization to achieve dynamic trapping and manipulation of a single metallic nanowire on a flat metal surface. We reveal that the plasmonic hybridization achieved by exciting plasmonic tweezers with a linearly polarized laser beam could induce strong trapping forces and large rotational torques on a single metallic nanowire. The position and orientation of the nanowire could dynamically be controlled by the hybridization-enhanced nonisotropic electric field in the gap. Experimental results further verify that a single Au nanowire could robustly be trapped at the center of an excited SPP field by the induced forces and then rotated by the torques. Finally, a plasmonic swallow tail structure is built to demonstrate its potential in the fabrication of lab-on-a-chip plasmonic devices.
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Affiliation(s)
- Yuquan Zhang
- Institute of Modern Optics, Nankai University , Tianjin 300071, China
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24
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Liaw JW, Lo WJ, Kuo MK. Wavelength-dependent longitudinal polarizability of gold nanorod on optical torques. OPTICS EXPRESS 2014; 22:10858-10867. [PMID: 24921785 DOI: 10.1364/oe.22.010858] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study theoretically investigates the wavelength-dependent longitudinal polarizability of a gold nanorod (GNR) irradiated by a polarized laser beam. The resultant optical torque in terms of the Maxwell stress tensor was analyzed quantitatively using the multiple multipole method. Our results indicate that the real part of the longitudinal polarizability of GNR can be either positive or negative, leading to the parallel or perpendicular modes, respectively. For the parallel and perpendicular modes, the long axis of GNR is rotated to align parallel and perpendicular, respectively, to the polarization direction of the illuminating light. The turning point between these two modes, depending on the aspect ratio (AR) and the size of GNR, nearly coincides with the longitudinal surface plasmon resonance (LSPR). The perpendicular mode ranges from the transverse SPR to LSPR, and the range of the parallel mode is broadband from LSPR to the near infrared regime. Owing to that a larger optical torque and less plasmonic heating are of concern, an efficiency of optical torque is defined to evaluate the performance of different wavelengths. Analysis results indicate that lasers with wavelength in the perpendicular mode are applicable to rotate and align a GNR of a higher AR. For example, the laser of 785 nm (the perpendicular mode) is superior to that of 1064 nm (the parallel mode, off-resonant from LSPR of 955 nm) for rotating a GNR of AR = 4 and radius 20 nm with an orientation of 45° with respect to the laser polarization.
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25
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Li Z, Zhang S, Tong L, Wang P, Dong B, Xu H. Ultrasensitive size-selection of plasmonic nanoparticles by Fano interference optical force. ACS NANO 2014; 8:701-708. [PMID: 24308824 DOI: 10.1021/nn405364u] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we propose a solution for the ultrasensitive optical selection of plasmonic nanoparticles using Fano interference-induced scattering forces. Under a Gaussian beam excitation, the scattering of a plasmonic nanoparticle at its Fano resonance becomes strongly asymmetric in the lateral direction and consequently results in a net transverse scattering force, that is, Fano interference-induced force. The magnitude of this transverse scattering force is comparable with the gradient force in conventional optical manipulation experiments. More interestingly, the Fano scattering force is ultrasensitive to the particle size and excitation frequency due to the phase sensitivity of the interference between adjacent plasmon modes in the particle. Utilizing this distinct feature, we show the possibility of size-selective sorting of silver and gold nanoparticles with an accuracy of about ±10 nm and silica-gold core-shell nanoparticles with shell thickness down to several nanometers. These results would add to the toolbox of optical manipulation and fabrication.
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Affiliation(s)
- Zhipeng Li
- Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University , Beijing 100048, PR China
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26
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Yan Z, Pelton M, Vigderman L, Zubarev ER, Scherer NF. Why single-beam optical tweezers trap gold nanowires in three dimensions. ACS NANO 2013; 7:8794-8800. [PMID: 24041038 DOI: 10.1021/nn403936z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Understanding whether noble-metal nanostructures can be trapped optically and under what conditions will enable a range of applications that exploit their plasmonic properties. However, there are several nontrivial issues that first need to be resolved. A major one is that metal particles experience strong radiation pressure in optical beams, while stable optical trapping requires an attractive force greater than this radiation pressure. Therefore, it has generally been considered impossible to obtain sufficiently strong gradient forces using single-beam optical tweezers to trap relatively large metal nanostructures in three dimensions. Here we demonstrate that a single, tightly focused laser beam with a wavelength of 800 nm can achieve three-dimensional optical trapping of individual gold (Au) nanowires with lengths over 2 μm. Nanowires can be trapped by the beam at one of their ends, in which case they undergo significant angular fluctuations due to Brownian motion of the untrapped end. They can also be trapped close to their midpoints, in which case they are oriented approximately perpendicular to the light polarization direction. The behavior is markedly different from that of Ag nanowires with similar length and diameter, which cannot be trapped in three dimensions by a single focused Gaussian beam. Our results, including electrodynamics simulations that help to explain our experimental findings, suggest that the conventional wisdom, which holds that larger metal particles cannot be trapped, needs to be replaced with an understanding based on the details of plasmon resonances in the particles.
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Affiliation(s)
- Zijie Yan
- The James Franck Institute and Department of Chemistry, The University of Chicago , 929 East 57th Street, Chicago, Illinois 60637, United States
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27
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Do J, Fedoruk M, Jäckel F, Feldmann J. Two-color laser printing of individual gold nanorods. NANO LETTERS 2013; 13:4164-4168. [PMID: 23927535 DOI: 10.1021/nl401788w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the deposition of individual gold nanorods from an optical trap using two different laser wavelengths. Laser light, not being resonant to the plasmon resonances of the nanorods, is used for stable trapping and in situ alignment of individual nanorods. Laser light, being resonant to the transversal mode of the nanorods, is used for depositing nanorods at desired locations. The power and polarization dependence of the process is investigated and discussed in terms of force balances between gradient and scattering forces, plasmonic heating, and rotational diffusion of the nanorods. This two-color approach enables faster printing than its one-color equivalent and provides control over the angular orientation (±16°) and location of the deposited nanorods at the single-nanorod level.
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Affiliation(s)
- Jaekwon Do
- Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München , Amalienstr. 54, 80799 Munich, Germany
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28
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Yan Z, Shah RA, Chado G, Gray SK, Pelton M, Scherer NF. Guiding spatial arrangements of silver nanoparticles by optical binding interactions in shaped light fields. ACS NANO 2013; 7:1790-802. [PMID: 23363451 DOI: 10.1021/nn3059407] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We demonstrate assembly of spheroidal Ag nanoparticle clusters, chains and arrays induced by optical binding. Particles with diameters of 40 nm formed ordered clusters and chains in aqueous solution when illuminated by shaped optical fields with a wavelength of 800 nm; specifically, close-packed clusters were formed in cylindrically symmetric optical traps, and linear chains were formed in line traps. We developed a coupled-dipole model to calculate the optical forces between an arbitrary number of particles and successfully predicted the experimentally observed particle separations and arrangements as well as their dependence on the polarization of the incident light. This demonstrates that the interaction between these small Ag particles and light is well described by approximating the particles as point dipoles, showing that these experiments extend optical binding into the Rayleigh regime. For larger Ag nanoparticles, with diameters of approximately 100 nm, the optical-binding forces become comparable to the largest gradient forces in the optical trap, and the particles can arrange themselves into regular arrays or synthetic photonic lattices. Finally, we discuss the differences between our experimental observations and the point dipole theory and suggest factors that prevent the Ag nanoparticles from aggregating as expected from the theory.
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Affiliation(s)
- Zijie Yan
- Department of Chemistry and The James Franck Institute, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
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29
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Yan Z, Jureller JE, Sweet J, Guffey MJ, Pelton M, Scherer NF. Three-dimensional optical trapping and manipulation of single silver nanowires. NANO LETTERS 2012; 12:5155-5161. [PMID: 22931238 DOI: 10.1021/nl302100n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report the first experimental realization of all-optical trapping and manipulation of plasmonic nanowires in three dimensions. The optical beam used for trapping is the Fourier transform of a linearly polarized Bessel beam (termed FT-Bessel). The extended depth of focus of this beam enables the use of a retroreflection geometry to cancel radiation pressure in the beam propagation direction, making it possible to trap highly scattering and absorbing silver nanowires. Individual silver nanowires with lengths of several micrometers can be positioned by the trapping beam with a precision better than 100 nm and are oriented by the polarization of the trapping light with a precision of approximately 1°. Multiple nanowires can be trapped simultaneously in spatially separated maxima of the trapping field. Since trapping in the interferometric FT-Bessel potential is robust in bulk solution and near surfaces, it will enable the controlled assembly of metal nanowires into plasmonic nanostructures.
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Affiliation(s)
- Zijie Yan
- The James Franck Institute, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
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