Micropillar array chips toward new immunodiagnosis.

In this paper, we demonstrate the possibility to use a micropillar array to perform molecular immunodiagnosis. A polydimethylsiloxane (PDMS) microdevice consisting of a rectangular array of micropillars (45 µm in height, 100 × 100 µm square cross section) was used to replace microchannels or gels (polyacrylamide or agarose) to perform electrokinetic separation. This microarray was used to mimic highly diluted gel and to maintain electrolyte within the pillar zone by capillary effect.

Isoelectric focusing in an ordered micropillar array.

An original micropillar array dedicated to electrophoretic separations has been developed. It consists of a rectangular zone of PDMS micropillars protruding on a PDMS block. This area has been chosen to mimic a diluted gel structure and remains uncovered to keep the ability to perform an immunoblot after the protein separation for further applications in the field of allergy diagnosis.