A dynamic bead-based microarray for parallel DNA detection

R. D. Sochol, B. P. Casavant, M. E. Dueck, L. P. Lee, L. Lin

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


A microfluidic system has been designed and constructed by means of micromachining processes to integrate both microfluidic mixing of mobile microbeads and hydrodynamic microbead arraying capabilities on a single chip to simultaneously detect multiple bio-molecules. The prototype system has four parallel reaction chambers, which include microchannels of 18 × 50 νm2 cross-sectional area and a microfluidic mixing section of 22 cm length. Parallel detection of multiple DNA oligonucleotide sequences was achieved via molecular beacon probes immobilized on polystyrene microbeads of 16 νm diameter. Experimental results show quantitative detection of three distinct DNA oligonucleotide sequences from the Hepatitis C viral (HCV) genome with single base-pair mismatch specificity. Our dynamic bead-based microarray offers an effective microfluidic platform to increase parallelization of reactions and improve microbead handling for various biological applications, including bio-molecule detection, medical diagnostics and drug screening.

Original languageEnglish
Article number054019
JournalJournal of Micromechanics and Microengineering
Issue number5
StatePublished - May 2011


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