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Focusing of microparticles in microfluidic systems

  • US 6,506,609 B1
  • Filed: 05/11/2000
  • Issued: 01/14/2003
  • Est. Priority Date: 05/17/1999
  • Status: Expired due to Term
First Claim
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1. A method of focusing and detecting particles flowing in a first microchannel, the method comprising:

  • flowing the particles in a sample fluid in the first microchannel;

    focusing the particles in the first microchannel by introducing a fluid into the first microchannel from only one of one or more second microchannels such that the particles are directed towards a first side of at least opposing first and second sides of the first microchannel;

    directing an interrogating light beam into the focused sample fluid at a location on the first side of the first microchannel; and

    detecting the particles in the focused sample fluid using the interrogating light beam.

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