Optical Encoding of Silver Zeolite Microcarriers (pages 957–960)
Gert De Cremer, Bert F. Sels, Jun-ichi Hotta, Maarten B. J. Roeffaers, Evelyne Bartholomeeusen, Eduardo Coutiño-Gonzalez, Valentin Valtchev, Dirk E. De Vos, Tom Vosch and Johan Hofkens
Article first published online: 15 DEC 2009 | DOI: 10.1002/adma.200902937
Highly resolved fluorescent patterns are generated in an individual silver-exchanged K-A zeolite crystal using two-photon excitation (see figure). The high stability, brightness, and spatial resolution of the patterns are an important advantage over the current state-of-the-art techniques in optical encoding of microcarriers. Therefore, this material shows high potential as a quality and/or safety label to prevent counterfeiting or as an advanced biolabel.