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Issue 1, 2008
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Integrated circuit/microfluidic chip to programmably trap and move cells and droplets with dielectrophoresis

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Abstract

We present an integrated circuit/microfluidic chip that traps and moves individual living biological cells and chemical droplets along programmable paths using dielectrophoresis (DEP). Our chip combines the biocompatibility of microfluidics with the programmability and complexity of integrated circuits (ICs). The chip is capable of simultaneously and independently controlling the location of thousands of dielectric objects, such as cells and chemical droplets. The chip consists of an array of 128 × 256 pixels, 11 × 11 µm2 in size, controlled by built-in SRAM memory; each pixel can be energized by a radio frequency (RF) voltage of up to 5 Vpp. The IC was built in a commercial foundry and the microfluidic chamber was fabricated on its top surface at Harvard. Using this hybrid chip, we have moved yeast and mammalian cells through a microfluidic chamber at speeds up to 30 µm sec–1. Thousands of cells can be individually trapped and simultaneously positioned in controlled patterns. The chip can trap and move pL droplets of water in oil, split one droplet into two, and mix two droplets into one. Our IC/microfluidic chip provides a versatile platform to trap and move large numbers of cells and fluid droplets individually for lab-on-a-chip applications.

Graphical abstract: Integrated circuit/microfluidic chip to programmably trap and move cells and droplets with dielectrophoresis

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Publication details

The article was received on 17 Jul 2007, accepted on 09 Oct 2007 and first published on 02 Nov 2007


Article type: Paper
DOI: 10.1039/B710928H
Citation: Lab Chip, 2008,8, 81-87
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    Integrated circuit/microfluidic chip to programmably trap and move cells and droplets with dielectrophoresis

    T. P. Hunt, D. Issadore and R. M. Westervelt, Lab Chip, 2008, 8, 81
    DOI: 10.1039/B710928H

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