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Issue 36, 2009
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Using optical landscapes to control, direct and isolate aerosol particles

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Abstract

We demonstrate the ability to direct the flow of aerosol droplets through a trapping cell using a tailored optical landscape generated by spatial light modulation. Using an optical barrier, droplets held in an optical trap can be effectively isolated from other droplets within the aerosol. To illustrate the effective isolation we compare the influence of different optical landscapes on the flow of free aerosol around a trapped droplet. We also present spectroscopic evidence of the optical barrier effect and apply the technique to permit controlled loading of different aerosol particles into neighbouring optical traps. This method will enable comparative measurements of aerosol properties to be made and facilitate the study of aerosol chemistry in sub-picolitre droplets. It also facilitates the use of an isolated droplet of known composition as a sensitive probe of the gas phase conditions in an aerosol ensemble.

Graphical abstract: Using optical landscapes to control, direct and isolate aerosol particles

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Publication details

The article was received on 28 Apr 2009, accepted on 08 Jun 2009 and first published on 07 Jul 2009


Article type: Paper
DOI: 10.1039/B908270K
Citation: Phys. Chem. Chem. Phys., 2009,11, 8015-8020
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    Using optical landscapes to control, direct and isolate aerosol particles

    J. B. Wills, J. R. Butler, J. Palmer and J. P. Reid, Phys. Chem. Chem. Phys., 2009, 11, 8015
    DOI: 10.1039/B908270K

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