Patent ID: 7485214
Filing Date: 2009-02-03
Classification: B01L,B03C,G01N

Abstract:
1. A microfluidic device, comprising: a) a microfluidic circuit having longitudinal axis; and b) an electric field generating means arranged to establish an electric field transverse to said longitudinal axis within at least a section of said microfluidic circuit; wherein said electric field generating means comprises: i) a first semiconductor region having a first type of conductivity and a second semiconductor region having an opposite type of conductivity; and ii) a voltage source for supplying a bias voltage between said first and said second semiconductor regions in order to concentrate an electrically charged substance in a portion of the microfluidic circuit; and iii) wherein at least said section of said microfluidic circuit is between said first semiconductor region and said second semiconductor region, and wherein said first and second semiconductor regions being arranged to form at least one P-N junction.