FEI Life Sciences (acquired by Thermo Fisher)The Tecnai Femto ultrafast electron microscope from FEI Co. captures ultrafast events and processes measured in femtoseconds, including the absorption of light energy and its transformation into heat, or mechanical changes and the crystallization or recrystallization of materials. Ultrashort laser pulses stimulate a brief flash of photoelectrons from the electron source, and a pulse of laser energy directed at the sample acts as a stimulus. 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