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Communication
Electrokinetic patterning of colloidal particles with optical landscapes
Stuart J.
Williams
,
Aloke
Kumar
and
Steven T.
Wereley
Lab Chip, 2008, 8, 1879-1882
DOI: 10.1039/B810787D
Received 25 Jun 2008, Accepted 02 Sep 2008
First published on the web 15 Sep 2008
Supplementary Info
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Fig. S1 showing the accumulation of over 1200 polystyrene particles
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The video corresponds to Fig. 3 of the article. Massive transport of polymer beads is shown occurring due to a change in the illumination pattern. The video is in real time
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The video corresponds to Fig. 2 of the article. The dashed circle corresponds to the location of the 'REP trap'. In this particular case the illumination is a simple focused laser spot. It is important to note that the dashed circle only denotes the approximate location of this laser spot and the spot itself being a diffraction limited is
1 μm in size. The video is in real time
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The video depicts the highly dynamic nature of REP. 690 nm polymer beads are initially captured using a 'REP trap' similar to that used in Supplementary Video 2 at 20 kHz and 6 Vpp. The trap is momentarily turned off and the particles are flushed using a pressure driven flow. New particles are then captured and the 'REP trap' is turned on. Subsequently, particle assemblies created with REP were permanently adhered to the surface of the electrode using an applied DC voltage of 2.5 V
MOV (1871K)
