Velocity distribution of Gold nanoparticles trapped on an optical waveguide

Hole, J. Patrick; Wilkinson, James S.; Grujić, Katarina; Hellesø, Olav Gaute

doi:10.1364/opex.13.003896

Cited by 21 publications

(10 citation statements)

References 14 publications

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“…Gold nanoparticles of diameters 20-80 nm were propelled in the evanescent wave above the waveguide with a speed of 4-8 mm/s with modal power 500 mW and TM polarization (at a wavelength of 1047 nm) [162,163]. Much bigger gold nanospheres of diameter 250 nm were guided with a velocity up to 500 mm/s with modal power 150 mW at a wavelength of 1066 nm [158]. A small dielectric spherical particle attached to the end of a single mode optical fiber forms the so-called fiber-optic OT that are able, as demonstrated by Numata et al [394], to confine in 2-D gold nanoparticles of sizes 40, 100 and 200 nm against the surface.…”

Section: Manipulation Of Nanoobjectsmentioning

confidence: 99%

Light at work: The use of optical forces for particle manipulation, sorting, and analysis

2008

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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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Section: Manipulation Of Nanoobjectsmentioning

confidence: 99%

Light at work: The use of optical forces for particle manipulation, sorting, and analysis

2008

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“…Meandering of the trapped particle was observed as the particle moved along the waveguide. As this 2 µm wide waveguide was multimode, the meandering is caused by multimode interference [19,20]. In the loop-section, the waveguides were 1.3 µm wide and single-mode.…”

Section: Tracking Of Particles On Top Of Straight Planar Waveguidesmentioning

confidence: 99%

Optical transport, lifting and trapping of micro-particles by planar waveguides

Helle¹,

Ahluwalia²,

Hellesø³

2015

Opt. Express

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Optical waveguides can be used to trap and transport microparticles. The particles are held close to the waveguide surface by the evanescent field and propelled forward. We propose a new technique to lift and trap particles above the surface of the waveguides. This is made possible by a gap between two opposing, planar waveguides. The field emitted from each of the waveguide ends diverge fast, away from the substrate and into the cover-medium. By combining two fields propagating at an angle upwards and coming from opposite sides of a gap, particles can be stably lifted and trapped at the crossing of the two fields. Thus, particles are transported by waveguides leading to a gap, where they are lifted away from the substrate and trapped. The experiments are supported by numerical simulations of the forces on the micro-particles. Fluorescence imaging is used to track the particles in 3D with a precision of 50 nm.

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“…Gold nanoparticles have a high scattering cross-section compared with latex particles and biological cells and have potential as tags in sorting of biological species. Hole et al (2005) trapped and propelled 250 nm diameter gold spheres; individual particle trajectories exhibited velocities up to 500 lm/s, showing promise for high throughput sorting. Recently Schroll et al (2007) have demonstrated bulk transport of liquid with mesoscopic spatial variations in refractive index under radiation pressure.…”

Section: Evanescent Field Trapping and Propulsionmentioning

confidence: 99%

Optofluidic integration for microanalysis

Hunt

Wilkinson

2007

Microfluid Nanofluid

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129

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This review describes recent research in the application of optical techniques to microfluidic systems for chemical and biochemical analysis. The ''lab-on-achip'' presents great benefits in terms of reagent and sample consumption, speed, precision, and automation of analysis, and thus cost and ease of use, resulting in rapidly escalating adoption of microfluidic approaches. The use of light for detection of particles and chemical species within these systems is widespread because of the sensitivity and specificity which can be achieved, and optical trapping, manipulation and sorting of particles show significant benefits in terms of discrimination and reconfigurability. Nonetheless, the full integration of optical functions within microfluidic chips is in its infancy, and this review aims to highlight approaches, which may contribute to further miniaturisation and integration.

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Velocity distribution of Gold nanoparticles trapped on an optical waveguide

Cited by 21 publications

References 14 publications

Light at work: The use of optical forces for particle manipulation, sorting, and analysis

Light at work: The use of optical forces for particle manipulation, sorting, and analysis

Optical transport, lifting and trapping of micro-particles by planar waveguides

Optofluidic integration for microanalysis

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