Porous Silicon Photonic Crystals as Encoded Microcarriers


  • The authors acknowledge financial support from TREX industries, inc., the National Institutes of Health and the Air Force Office of Scientific Research (Grant# F49620-02-1-0288). Supporting Information for this article is available online from Wiley InterScience or from the author.


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A simple method used to construct microparticles of porous Si photonic crystals that display highly resolved and easily controlled optical diffraction peaks is described. The spectral diffraction peaks can act as digits in an encoding scheme, and the possibility of generating particle libraries with >106 distinct codes is demonstrated (see Figure).