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Method and apparatus for detecting molecules

  • US 10,222,333 B2
  • Filed: 02/24/2010
  • Issued: 03/05/2019
  • Est. Priority Date: 03/23/2009
  • Status: Active Grant
First Claim
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1. A method of detecting a single molecule attached to a surface with one or more light sensitive elements on or comprised within said surface wherein said surface is present in a photodetector without microlens and without filter layers, the method comprising:

  • illuminating said one or more light sensitive elements with a light source,detecting a bead label attached to said single moleculesaid bead label (i) has a diameter which is at least 30% of the width, breadth or diameter of said one or more light sensitive elements or (ii) is at least 1 μ

    m in diameter,said bead label and said surface are different entities,said bead label is detected by a reduction in the amount of light received by said one or more light sensitive elements caused by the presence of said bead label which blocks light from reaching the one or more light sensitive elements, andsaid single molecule is detected when the bead label is detected.

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