2 Citations (Scopus)

Abstract

Drops can be moved in complex patterns on superhydrophobic surfaces using a reconfigured computer-controlled x-y metrology stage with a high degree of accuracy, flexibility, and reconfigurability. The stage employs a DMC-4030 controller which has a RISC-based, clock multiplying processor with DSP functions, accepting encoder inputs up to 22 MHz, provides servo update rates as high as 32 kHz, and processes commands at rates as fast as 40 milliseconds. A 6.35 mm diameter cylindrical NdFeB magnet is translated by the stage causing water drops to move by the action of induced magnetization of coated iron microspheres that remain in the drop and are attracted to the rare earth magnet through digital magnetofluidics. Water drops are easily moved in complex patterns in automated digital magnetofluidics at an average speed of 2.8 cm/s over a superhydrophobic polyethylene surface created by solvent casting. With additional components, some potential uses for this automated microfluidic system include characterization of superhydrophobic surfaces, water quality analysis, and medical diagnostics.

Original languageEnglish (US)
Article number012006
JournalJournal of Physics: Conference Series
Volume127
DOIs
StatePublished - 2008

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magnets
water quality
plasticizers
commands
coders
surface water
clocks
water
metrology
central processing units
polyethylenes
controllers
flexibility
rare earth elements
iron
magnetization

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Automated digital magnetofluidics. / Schneider, J.; Garcia, Antonio; Marquez, M.

In: Journal of Physics: Conference Series, Vol. 127, 012006, 2008.

Research output: Contribution to journalArticle

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