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Ultrasensitive biosensors

  • US 7,692,219 B1
  • Filed: 06/27/2005
  • Issued: 04/06/2010
  • Est. Priority Date: 06/25/2004
  • Status: Active Grant
First Claim
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1. A biosensing resistor apparatus, comprisinga substrate,a conducting or semi-conducting layer with a coating, andrecognition elements attached to the surface of the coating,wherein the conducting or semi-conducting layer is doped with implants or other doping means in two or more regions, wherein one of the regions is given a lighter doping than another and therefore has higher resistance,wherein the selective doping of multiple regions allows at least one selected from the group consisting of different targets, different target concentrations, and multiple sensing objectives to be addressed.

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