Optical manipulation of airborne particles: techniques and applications

McGloin, David; Burnham, Daniel R.; Summers, Michael D.; Rudd, Daniel; Dewar, Neil; Anand, Smriti

doi:10.1039/b702153d

Cited by 95 publications

(60 citation statements)

References 39 publications

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“…Droplet manipulation mechanisms that have been investigated cover a broad range of physical principles, including electrowetting on dielectric (EWOD) [12,13], dielectrophoresis (DEP) [14,15], thermocapillary force [16,17], surface acoustic wave [18], magnetic force [19,20], and optical forces [21]. In recent years, many light-driven droplet actuation mechanisms have been demonstrated, aiming to provide more functionalities, flexibility, lower cost, and higher throughput droplet manipulation tools or platforms [22,23].…”

Section: Introductionmentioning

confidence: 99%

Light-Driven Droplet Manipulation Technologies for Lab-on-a-Chip Applications

Park

Chiou

2011

Advances in OptoElectronics

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Droplet-based (digital) microfluidics has been demonstrated in many lab-on-a-chip applications due to its free crosscontamination and no dispersion nature. Droplet manipulation mechanisms are versatile, and each has unique advantages and limitations. Recently, the idea of manipulating droplets with light beams either through optical forces or light-induced physical mechanisms has attracted some interests, since light can achieve 3D addressing, carry high energy density for high speed actuation, and be patterned and dynamically reconfigured to generate a large number of light beams for massively parallel manipulation. This paper reviews recent developments of various optical technologies for droplet manipulation and their applications in lab-on-achip.

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Section: Introductionmentioning

confidence: 99%

Light-Driven Droplet Manipulation Technologies for Lab-on-a-Chip Applications

Park

Chiou

2011

Advances in OptoElectronics

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“…Manipulation of droplets in a precise and flexible manner plays a vital role in these applications. A number of approaches have been commonly used to manipulate the dynamical behavior of droplets in microfluidics, including electrowetting on dielectric (EWOD) [1,2], dielectrophoresis (DEP) [3,4], hydrodynamic stress [5,6,7], thermocapillary force [8,9,10,11], surface acoustic wave [12], magnetic force [13,14], and optical forces [15,16]. In recent years, a novel use of surface energy gradients was demonstrated to guide or anchor droplets against a mean flow in a confined microchannel [17,18].…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann simulation of the trapping of a microdroplet in a well of surface energy

Liu

Zhang

2017

Computers & Fluids

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This version is available at https://strathprints.strath.ac.uk/58315/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. Lattice Boltzmann Simulation of the Trapping of a Microdroplet in a Well of Surface EnergyHaihu Liu a, * ,Y o n g h a oZ h a n g b AbstractIn this paper, a three-dimensional phase-field lattice Boltzmann method is used to simulate the dynamical behavior of a droplet, subject to an outer viscous flow, in a microchannel that contains a cylindrical hole etched into its top surface.The influence of the capillary number and the hole diameter (expressed as the ratio of hole diameter to channel height, b) is investigated. We demonstrate numerically that the surface energy gradient induced by the hole canc r e a t ea n anchoring force to resist the hydrodynamic drag from the outer flow, resulting in the droplet anchored to the hole when the capillary number is below a critical value. As b increases, the droplet can be anchored more easily. For b<2, the droplet partially enters into the hole and forms a spherical cap; whereas for b>2, the spherical cap of droplet reaches the top wall of the hole, making the hole depth into an additional important parameter. These observations are consistent with the previously reported experiments. However, the droplet does

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“…Optical tweezing is another micromanipulation technique that is especially well suited for stable confinement of very small droplets and readily adaptable for simultaneous manipulation of large numbers of particles [11]. Various studies employed optical tweezing to localize liquid aerosols over long periods of time for applications in a large variety of fields including atmospheric chemistry and physics, and health science [12,13]. Optical tweezing has also been used to confine and move solid lasing microspheres [14] or lasing emulsion droplets [15].…”

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confidence: 99%

“…The trapping laser beam was sent through a beam expander and focused into the sample chamber by a water immersion microscope objective (NA 1.2, 60×; Nikon) in the inverted microscope geometry. Based on the previous work [13], the power of the trapping beam was set to 3.5 mW at the focus of the microscope objective for stable on-axis trapping of aerosols with diameters ranging between 5 and 10 μm. Pulsed green beam (λ 532 nm, 20 ns pulse width and 33 kHz repetition rate) obtained after frequency-doubling the output of a home-built, passively Q-switched Nd-YVO 4 laser was used for pumping the trapped microdroplets.…”

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confidence: 99%

Dye lasing in optically manipulated liquid aerosols

et al. 2013

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Dye lasing in optically manipulated liquid aerosolsKaradag, Y.; Aas, M.; Anand, S.; McGloin, David; Kiraz, A. General rightsCopyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain.• You may freely distribute the URL identifying the publication in the public portal. Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. We report lasing in airborne, rhodamine B-doped glycerol-water droplets with diameters ranging between 7.7 and 11.0 μm, which were localized using optical tweezers. While being trapped near the focal point of an infrared laser, the droplets were pumped with a Q-switched green laser. Our experiments revealed nonlinear dependence of the intensity of the droplet whispering gallery modes (WGMs) on the pump laser fluence, indicating dye lasing. The average wavelength of the lasing WGMs could be tuned between 600 and 630 nm by changing the droplet size. These results may lead to new ways of probing airborne particles, exploiting the high sensitivity of stimulated emission to small perturbations in the droplet laser cavity and the gain medium.

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Optical manipulation of airborne particles: techniques and applications

Cited by 95 publications

References 39 publications

Light-Driven Droplet Manipulation Technologies for Lab-on-a-Chip Applications

Light-Driven Droplet Manipulation Technologies for Lab-on-a-Chip Applications

Lattice Boltzmann simulation of the trapping of a microdroplet in a well of surface energy

Dye lasing in optically manipulated liquid aerosols

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