An Encoded Microsphere


There is disclosed a method for encoding a microsphere comprising the steps of i) providing a layer of a polyionic polymer to the microsphere, ii) coating the layer with quantum dots, iii) providing a layer of a transparent polyionic polymer to the coated polymer layer and iv) coating the transparent layer with the same and/or different quantum dots and, optionally, repeating steps iii) and iv) whereby to characterise the microsphere by the wavelength and/or intensity of its photoemission spectrum on excitation at a predetermined wavelength of incident light.

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Document History
  • Publication: Jul 17, 2008
  • Application: Jan 11, 2008
    WO GB 2008000092 W
  • Priority: Jan 11, 2007
    GB GB 0700532 A

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