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Controlled Nanoscale Mechanical Phenomena Discovered with Ultrafast Electron Microscopy
Author(s) -
Flannigan David J.,
Lobastov Vladimir A.,
Zewail Ahmed H.
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200704147
Subject(s) - ultrashort pulse , tetracyanoquinodimethane , laser , materials science , microscopy , electron microscope , nanoscopic scale , crystal (programming language) , optics , perpendicular , stacking , crystallography , molecule , optoelectronics , nanotechnology , chemistry , nuclear magnetic resonance , physics , geometry , mathematics , organic chemistry , computer science , programming language
On again, off again : The reversible expansion and contraction of single crystals of [Cu(TCNQ)] induced by near‐infrared laser pulses was studied with ultrafast electron microscopy (TCNQ=7,7,8,8‐tetracyanoquinodimethane). The crystal expands along the π‐stacking axis of the TCNQ molecules, but not perpendicular to this axis, when exposed to light. The crystal returned to its original structure when the laser light was blocked.