Bioanalysis: Microbeads are easily fixed

A passive method for sorting and fixing microbeads of different sizes could lead to cheaper and more functional biological assays, researchers report. Biological assays are an integral part of the researcher's toolkit in the fields of biomolecular chemistry and genomics. Microfluidic microbead systems, which consist of arrays of beads coated with an assay-specific reagent, have revolutionized biological assay technology by allowing the high-throughput detection of target molecules from small sample volumes. Fabrication of the microbead systems, however, requires great care and various ancillary devices.

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