2015 BFY II Abstract Detail Page

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Abstract Title: Low-cost optical manipulation using hanging droplets of PDMS
Abstract: We propose and demonstrate a low-cost optical micromanipulation system that makes use of simple microfabricated components coupled to a smartphone camera for imaging. Layering hanging droplets of polydimethylsiloxane (PDMS) on microscope coverslips [1], and curing with a 100 W bulb, creates lenses capable of optical trapping. Optically trapped 3.93 ?m silica beads were imaged with a second hanging droplet lens, doped with 1400 ?g mL-1 Sudan II dye. Through doping, a lens with an integrated long-pass filter that effectively blocks the 532 nm trapping light was produced [2]. Illumination was provided by shining a lamp into polystyrene foam packaging, perpendicular to the imaging path, producing a diffuse light source. Neglecting the cost of the laser, which could be replaced by a laser pointer or other low cost alternative, our system can be constructed for approx. £23.23 ($36.35). We observed two dimensional trapping and report a Q value of ? 8.9 x 10-3. The techniques here are an addition to the growing body of work on low cost and adaptable microfluidics [3].
Abstract Type: Poster

Author/Organizer Information

Primary Contact: Craig McDonald
University of Dundee
Division of Electronic Engineering and Physics
Dundee, Scotland, DD1 4HN
and Co-Presenter(s)
D. McGloin, University of Dundee

Presentation Documents

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