Nanomechanical properties of molecular organic thin films
نویسندگان
چکیده
Using atomic force microscopy we have studied the nanomechanical response to nanoindentations of surfaces of highly oriented molecular organic thin films (thickness<1000 nm). The Young’s modulus E can be estimated from the elastic deformation using Hertzian mechanics. For the quasi-one-dimensional metal tetrathiafulvalene tetracyanoquinodimethane E;20 GPa and for the a phase of the p-nitrophenyl nitronyl nitroxide radical E;2 GPa. Above a few GPa, the surfaces deform plastically as evidenced by discrete discontinuities in the indentation curves associated to molecular layers being expelled by the penetrating tip. © 2001 American Vacuum Society. @DOI: 10.1116/1.1368662#
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