An elongated structure includes a core, at least one and preferably a plurality of gain medium layers disposed about said core for providing a plurality of characteristic emission wavelengths, and a growth matrix or functionalized support suitable for the synthesis therein or thereon of a chemical compound....http://www.google.com.au/patents/US20030162296?utm_source=gb-gplus-sharePatent US20030162296 - Micro-lasing beads and structures for combinatorial chemistry and other applications, and techniques for fabricating the structures and for detecting information encoded by the structures
