Issue Date: February 27, 2006
Nanocrystal-silica composite lasers are stable in solvents
Tiny lasers made of semiconductor nanocrystals incorporated in a film would be ideal for use in microfluidic chemosensors. Such films made with titania matrices have already been shown to lase. Unfortunately, these nanocrystal-titania composites degrade in water and alcohols, so they are unsuitable for microfluidics. MIT chemistry professors Moungi G. Bawendi and Daniel G. Nocera and their coworkers have now made a solvent-stable laser with CdSe nanocrystals embedded in a silica matrix (J. . . .
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