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Praveen Kamath P, Sil S, Truong VG, Nic Chormaic S. Particle trapping with optical nanofibers: a review [Invited]. BIOMEDICAL OPTICS EXPRESS 2023; 14:6172-6189. [PMID: 38420322 PMCID: PMC10898553 DOI: 10.1364/boe.503146] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 03/02/2024]
Abstract
Optical trapping has proven to be an efficient method to control particles, including biological cells, single biological macromolecules, colloidal microparticles, and nanoparticles. Multiple types of particles have been successfully trapped, leading to various applications of optical tweezers ranging from biomedical through physics to material sciences. However, precise manipulation of particles with complex composition or of sizes down to nanometer-scales can be difficult with conventional optical tweezers, and an alternative manipulation tool is desirable. Optical nanofibers, that is, fibers with a waist diameter smaller than the propagating wavelength of light, are ideal candidates for optical manipulation due to their large evanescent field that extends beyond the fiber surface. They have the added advantages of being easily connected to a fibered experimental setup, being simple to fabricate, and providing strong electric field confinement and intense magnitude of evanescent fields at the nanofiber's surface. Many different particles have been trapped, rotated, transported, and assembled with such a system. This article reviews particle trapping using optical nanofibers and highlights some challenges and future potentials of this developing topic.
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Affiliation(s)
- Pramitha Praveen Kamath
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Souvik Sil
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Viet Giang Truong
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Síle Nic Chormaic
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
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Richards CJ, Smart TJ, Jones PH, Cubero D. A microscopic Kapitza pendulum. Sci Rep 2018; 8:13107. [PMID: 30166616 PMCID: PMC6117283 DOI: 10.1038/s41598-018-31392-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 08/14/2018] [Indexed: 11/09/2022] Open
Abstract
Pyotr Kapitza studied in 1951 the unusual equilibrium features of a rigid pendulum when its point of suspension is under a high-frequency vertical vibration. A sufficiently fast vibration makes the top position stable, putting the pendulum in an inverted orientation that seemingly defies gravity. Kapitza’s analytical method, based on an asymptotic separation of fast and slow variables yielding a renormalized potential, has found application in many diverse areas. Here we study Kapitza’s pendulum going beyond its typical idealizations, by explicitly considering its finite stiffness and the dissipative interaction with the surrounding medium, and using similar theoretical methods as Kapitza. The pendulum is realized at the micrometre scale using a colloidal particle suspended in water and trapped by optical tweezers. Though the strong dissipation present at this scale prevents the inverted pendulum regime, new ones appear in which the equilibrium positions are displaced to the side, and with transitions between them determined either by the driving frequency or the friction coefficient. These new regimes could be exploited in applications aimed at particle separation at small scales.
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Affiliation(s)
- Christopher J Richards
- Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
| | - Thomas J Smart
- Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
| | - Philip H Jones
- Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
| | - David Cubero
- Departamento de Fisica Aplicada I, EPS, Universidad de Sevilla, Calle Virgen de África 7, 41011, Sevilla, Spain.
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Köhler J, Ruschke J, Ferenz KB, Esen C, Kirsch M, Ostendorf A. Investigation of albumin-derived perfluorocarbon-based capsules by holographic optical trapping. BIOMEDICAL OPTICS EXPRESS 2018; 9:743-754. [PMID: 29552409 PMCID: PMC5854075 DOI: 10.1364/boe.9.000743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 06/08/2023]
Abstract
Albumin-derived perfluorocarbon-based capsules are promising as artificial oxygen carriers with high solubility. However, these capsules have to be studied further to allow initial human clinical tests. The aim of this paper is to provide and characterize a holographic optical tweezer to enable contactless trapping and moving of individual capsules in an environment that mimics physiological (in vivo) conditions most effectively in order to learn more about the artificial oxygen carrier behavior in blood plasma without recourse to animal experiments. Therefore, the motion behavior of capsules in a ring shaped or vortex beam is analyzed and optimized on account of determination of the optical forces in radial and axial direction. In addition, due to the customization and generation of dynamic phase holograms, the optical tweezer is used for first investigations on the aggregation behavior of the capsules and a statistical evaluation of the bonding in dependency of different capsule sizes is performed. The results show that the optical tweezer is sufficient for studying individual perfluorocarbon-based capsules and provide information about the interaction of these capsules for future use as artificial oxygen carriers.
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Affiliation(s)
- Jannis Köhler
- Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum,
Germany
| | - Jegor Ruschke
- Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum,
Germany
| | - Katja Bettina Ferenz
- Institut für Physiologische Chemie, Universität Duisburg-Essen, Universitätsklinikum Essen, Hufelandstraße 55, 45147 Essen,
Germany
| | - Cemal Esen
- Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum,
Germany
| | - Michael Kirsch
- Institut für Physiologische Chemie, Universität Duisburg-Essen, Universitätsklinikum Essen, Hufelandstraße 55, 45147 Essen,
Germany
| | - Andreas Ostendorf
- Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum,
Germany
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Memoli G, Fury CR, Baxter KO, Gélat PN, Jones PH. Acoustic force measurements on polymer-coated microbubbles in a microfluidic device. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2017; 141:3364. [PMID: 28599556 PMCID: PMC5436981 DOI: 10.1121/1.4979933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
This work presents an acoustofluidic device for manipulating coated microbubbles, designed for the simultaneous use of optical and acoustical tweezers. A comprehensive characterization of the acoustic pressure in the device is presented, obtained by the synergic use of different techniques in the range of acoustic frequencies where visual observations showed aggregation of polymer-coated microbubbles. In absence of bubbles, the combined use of laser vibrometry and finite element modelling supported a non-invasive measurement of the acoustic pressure and an enhanced understanding of the system resonances. Calibrated holographic optical tweezers were used for direct measurements of the acoustic forces acting on an isolated microbubble, at low driving pressures, and to confirm the spatial distribution of the acoustic field. This allowed quantitative acoustic pressure measurements by particle tracking, using polystyrene beads, and an evaluation of the related uncertainties. This process facilitated the extension of tracking to microbubbles, which have a negative acoustophoretic contrast factor, allowing acoustic force measurements on bubbles at higher pressures than optical tweezers, highlighting four peaks in the acoustic response of the device. Results and methodologies are relevant to acoustofluidic applications requiring a precise characterization of the acoustic field and, in general, to biomedical applications with microbubbles or deformable particles.
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Affiliation(s)
- Gianluca Memoli
- Department of Acoustics, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Christopher R Fury
- Department of Acoustics, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Kate O Baxter
- Department of Acoustics, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Pierre N Gélat
- Department of Acoustics, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom
| | - Philip H Jones
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
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Liu Z, Jones PH. Optical manipulation using highly focused alternate radially and azimuthally polarized beams modulated by a devil's lens. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2016; 33:2501-2508. [PMID: 27906277 DOI: 10.1364/josaa.33.002501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We propose and demonstrate a novel high numerical aperture (NA) focusing system composed of an annular beam with alternate radially and azimuthally polarized rings, focused by a devil's lens (DL), and further investigate its radiation forces acting upon a Rayleigh particle both analytically and numerically. Strongly focused cylindrical vector beams produce either dark-centered or peak-centered intensity distributions depending on the state of polarization, whereas the DL produces a series of foci along the propagation direction. We exploit these focusing properties and show that by selecting an appropriate truncation parameter in front of the focusing lens, the proposed optical focusing system can selectively trap and manipulate dielectric micro-particles with low or high refractive indices by simply adjusting the radius of the pupil or the beam. Finally, the stability conditions for effectively trapping and manipulating Rayleigh particles are analyzed. The results obtained in this work are of interest in possible applications in optical confinement and manipulation, sorting micro-particles, and making use of a DL.
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Magazzú A, Spadaro D, Donato MG, Sayed R, Messina E, D’Andrea C, Foti A, Fazio B, Iatí MA, Irrera A, Saija R, Gucciardi PG, Maragó OM. Optical tweezers: a non-destructive tool for soft and biomaterial investigations. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2015. [DOI: 10.1007/s12210-015-0395-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Mihiretie BM, Snabre P, Loudet JC, Pouligny B. Optically driven oscillations of ellipsoidal particles. Part I: experimental observations. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2014; 37:124. [PMID: 25577402 DOI: 10.1140/epje/i2014-14124-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/21/2014] [Accepted: 11/06/2014] [Indexed: 06/04/2023]
Abstract
We report experimental observations of the mechanical effects of light on ellipsoidal micrometre-sized dielectric particles, in water as the continuous medium. The particles, made of polystyrene, have shapes varying between near disk-like (aspect ratio k = 0.2) to very elongated needle-like (k = 8). Rather than the very tightly focused beam geometry of optical tweezers, we use a moderately focused laser beam to manipulate particles individually by optical levitation. The geometry allows us varying the longitudinal position of the particle, and to capture images perpendicular to the beam axis. Experiments show that moderate-k particles are radially trapped with their long axis lying parallel to the beam. Conversely, elongated (k > 3) or flattened (k < 0.3) ellipsoids never come to rest, and permanently "dance" around the beam, through coupled translation-rotation motions. The oscillations are shown to occur in general, be the particle in bulk water or close to a solid boundary, and may be periodic or irregular. We provide evidence for two bifurcations between static and oscillating states, at k ≈ 0.33 and k ≈ 3 for oblate and prolate ellipsoids, respectively. Based on a recently developed 2-dimensional ray-optics simulation (Mihiretie et al., EPL 100, 48005 (2012)), we propose a simple model that allows understanding the physical origin of the oscillations.
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Affiliation(s)
- B M Mihiretie
- CNRS, Centre de Recherche Paul Pascal, Université de Bordeaux, Avenue A. Schweitzer, F-33600, Pessac, France
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Valkai S, Oroszi L, Ormos P. Optical tweezers with tips grown at the end of fibers by photopolymerization. APPLIED OPTICS 2009; 48:2880-2883. [PMID: 19458738 DOI: 10.1364/ao.48.002880] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a method to build an optical tip at the end of a single-mode optical fiber. The tip is grown by a self-writing process: photopolymerization by the light coming from the optical fiber. We developed a technique to produce a flat end surface on the tip. The good optical quality of the tip and the output laser beam was demonstrated by the fact that a counterpropagating optical trap could be constructed by using the tips with parameters comparable to regular fiber traps. Because of the small size of the tips, the tweezers require a much smaller space than regular fiber traps.
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Affiliation(s)
- Sándor Valkai
- Institute of Biophysics, Biological Research Centre, Hungarian Academy of Sciences, Temesvári krt 62, H-6726 Szeged, Hungary
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Jonás A, Zemánek P. Light at work: the use of optical forces for particle manipulation, sorting, and analysis. Electrophoresis 2009; 29:4813-51. [PMID: 19130566 DOI: 10.1002/elps.200800484] [Citation(s) in RCA: 257] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We review the combinations of optical micro-manipulation with other techniques and their classical and emerging applications to non-contact optical separation and sorting of micro- and nanoparticle suspensions, compositional and structural analysis of specimens, and quantification of force interactions at the microscopic scale. The review aims at inspiring researchers, especially those working outside the optical micro-manipulation field, to find new and interesting applications of these methods.
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Affiliation(s)
- Alexandr Jonás
- Institute of Scientific Instruments of the AS CR, vvi, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
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