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Issue 68, 2015
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Low-cost optical manipulation using hanging droplets of PDMS

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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, and curing with a 100 W bulb, creates lenses capable of optical trapping. Optically trapped 3.93 μm silica beads were imaged with a second hanging droplet lens, doped with 1400 μg 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. Illumination was provided by shining a lamp into polystyrene foam packaging, perpendicular to the imaging path, producing a diffuse light source. We observed two dimensional trapping and report a Q value of ∼8.9 × 10−3. The techniques here are an addition to the growing body of work on low cost and adaptable microfluidics.

Graphical abstract: Low-cost optical manipulation using hanging droplets of PDMS

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Supplementary files

Article information


Submitted
24 Apr 2015
Accepted
17 Jun 2015
First published
17 Jun 2015

This article is Open Access

RSC Adv., 2015,5, 55561-55565
Article type
Paper
Author version available

Low-cost optical manipulation using hanging droplets of PDMS

C. McDonald and D. McGloin, RSC Adv., 2015, 5, 55561
DOI: 10.1039/C5RA11431D

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