Low-cost optical manipulation using hanging droplets of PDMS

Craig McDonald; David McGloin

doi:10.1039/C5RA11431D

Low-cost optical manipulation using hanging droplets of PDMS

Craig McDonald (Lead / Corresponding author), David McGloin

Physics

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

243 Downloads (Pure)

Abstract

We propose and demonstrate a low-cost optical micromanipulation system that makes use of simple microfrabricated 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 report trapping Q values of ~ 8.9 × 10^-3. The techniques here are an addition to the growing body of work on low cost and adaptable microfluidics.

Original language	English
Pages (from-to)	55561-55565
Number of pages	5
Journal	RSC Advances
Volume	5
Issue number	68
Early online date	17 Jun 2015
DOIs	https://doi.org/10.1039/C5RA11431D
Publication status	Published - 2015

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10.1039/C5RA11431D

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This article is licensed under a Creative Commons Attribution 3.0 Unported License
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2015_05_25_Droplet_paper
Accepted author manuscript, 3.41 MB
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Applications of Optical Manipulation for Low Cost Implementation, Beam Shaping and Biophysical Force Measurements
McDonald, C. (Author), McGloin, D. (Supervisor) & Fagerholm, S. (Supervisor), 2017
Student thesis: Doctoral Thesis › Doctor of Philosophy

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Low-cost optical manipulation using hanging droplets of PDMS

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Applications of Optical Manipulation for Low Cost Implementation, Beam Shaping and Biophysical Force Measurements

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