Phase contrast in Simultaneous Topography and Recognition imaging

The operation of a force microscope in Simultaneous Topography and Recognition (TREC) imaging mode is analyzed by means of numerical simulations. Both topography and recognition signals are analyzed by using a worm-like chain force as the specific interaction between the functionalized tip probe and...

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Bibliographic Details
Published in:Ultramicroscopy 2009-08, Vol.109 (9), p.1189-1192
Main Authors: Fuss, M.C., Sahagún, E., Köber, M., Briones, F., Luna, M., Sáenz, J.J.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Dynamic force microscopy
Molecular recognition imaging
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Summary:The operation of a force microscope in Simultaneous Topography and Recognition (TREC) imaging mode is analyzed by means of numerical simulations. Both topography and recognition signals are analyzed by using a worm-like chain force as the specific interaction between the functionalized tip probe and the sample. The special feedback mechanism in this mode is shown to couple the phase signal to the presence of molecular recognition interactions even in absence of dissipation.
ISSN:0304-3991
1879-2723
DOI:10.1016/j.ultramic.2009.05.009