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Issue 13, 2011
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Photophoretic assembly and migration of dielectric particles and Escherichia coli in liquids using a subwavelength diameter optical fiber

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Abstract

We demonstrate a photophoretic assembly and migration of dielectric (SiO2 and TiO2) particles and bacteria (Escherichia coli) in liquids by using a subwavelength diameter fiber. With a lightwave at 1.55 μm launched into the fiber, the objects are radiated by the leaking light of the fiber to yield negative photophoretic forces which drive the objects to move toward the fiber, with an average assembling/migrating speed of 5–15 individuals per second (ind/s). The influences of laser-on duration, optical power, and size of particles on the photophoretic velocities are also investigated.

Graphical abstract: Photophoretic assembly and migration of dielectric particles and Escherichia coli in liquids using a subwavelength diameter optical fiber

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Publication details

The article was received on 01 Apr 2011, accepted on 20 Apr 2011 and first published on 09 May 2011


Article type: Paper
DOI: 10.1039/C1LC20272C
Citation: Lab Chip, 2011,11, 2241-2246
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    Photophoretic assembly and migration of dielectric particles and Escherichia coli in liquids using a subwavelength diameter optical fiber

    H. Lei, Y. Zhang, X. Li and B. Li, Lab Chip, 2011, 11, 2241
    DOI: 10.1039/C1LC20272C

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