22,847 research outputs found
Themed issue: Optofluidics
The term optofluidics defines a growing
research area that integrates optics and
microfluidics in ways that enable unique
strengths and advantages for a broad range
of applications. The First International
Conference on Optofluidics (Optofluidics-
2011) organized by Xi’an Jiaotong
University and Lab on a Chip on 11–12
December 2011 featured work in this field,
with an exciting two-day program of presentations
and discussions. We are happy
that Lab on a Chip, a major publication
destination for optofluidic research, has
scheduled this themed issue on Optofluidics.
We are especially heartened that the optofluidics
community has responded enthusiastically
with a large number of excellent
manuscript submissions
A channel Brownian pump powered by an unbiased external force
A Brownian pump of particles in an asymmetric finite tube is investigated in
the presence of an unbiased external force. The pumping system is bounded by
two particle reservoirs. It is found that the particles can be pumped through
the tube from a reservoir at low concentration to one at the same or higher
concentration. There exists an optimized value of temperature (or the amplitude
of the external force) at which the pumping capacity takes its maximum value.
The pumping capacity decreases with increasing the radius at the bottleneck of
the tube.Comment: 14 pages, 9 figure
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