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Light Determines Crystal Phase

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Chemists at Polytechnic University in New York and Illinois Institute of Technology in Chicago have used infrared radiation to produce crystalline phases that depend on the polarization of the light. The phenomenon may offer a "green" industrial process for controlling the production of polymorphs and lead to the discovery of unknown phases. In work described in the Oct. 21 issue of Physical Review Letters, they irradiated solutions of glycine and water for one minute with 9-ns polarized pulses from a Q-switched 1064-nm Nd:YAG. Eight of the 18 samples that were exposed to circularly...Read full article

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    Published: January 2003
    crystalline phasesindustrialinfrared radiationpolarization of the lightResearch & Technology

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