公开(公告)号：US20130252234A1

公开(公告)日：2013-09-26

申请号：US13894296

申请日：2013-05-14

Applicant: Fluidigm Corporation

Inventor： Hany Nassef ,  Greoffrey Facer ,  Marc Unger

IPC: G01N27/60

CPC classification number: C03C25/68 ,  B01L3/502707 ,  B01L2300/0645 ,  B01L2300/0816 ,  B01L2300/123 ,  B01L2400/0481 ,  B01L2400/0655 ,  G01N15/1031 ,  G01N15/12 ,  G01N27/00 ,  G01N27/60 ,  G01N33/48707 ,  G01N33/48721 ,  G01N2015/1087 ,  Y10T436/2575

Abstract: The presence of a detectable entity within a detection volume of a microfabricated elastomeric structure is sensed through a change in the electrical or magnetic environment of the detection volume. In embodiments utilizing electronic detection, an electric field is applied to the detection volume and a change in impedance, current, or combined impedance and current due to the presence of the detectable entity is measured. In embodiments utilizing magnetic detection, the magnetic properties of a magnetized detected entity alter the magnetic field of the detection volume. This changed magnetic field induces a current which can reveal the detectable entity. The change in resistance of a magnetoresistive element may also reveal the passage of a magnetized detectable entity.