Influence of Fluid Cell Design on the Frequency Response of AFM Microcantilevers in Liquid MediaReportar como inadecuado




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Center for Applied Research on Polymers and Composites CREPEC, Department of Mechanical and Industrial Engineering, Concordia University, 1455 de Maisonneuve Blvd West, EV013.210, Montreal, Quebec, Canada





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Abstract A study of the frequency response of AFM microcantilevers in liquid media contained in a commercial fluid cell is presented. Such systems exhibit complicated dynamics which are often not well described by available theories. Their dynamic behavior has a direct effect on the use of the AFM in dynamic mode while imaging in liquid or while extracting the rheological properties of the fluid. We explore the issues related to the design of the cantilever holder-fluid cell and propose an approach for evaluating, minimizing and recognizing the ultimate limitations of commercial cantilever holders. A technique for estimating the frequency response spectrum of the fluid cell itself from experimental data is presented. This spectrum can then be used to evaluate whether or not the fluid cell is suited for the desired purpose. View Full-Text

Keywords: AFM; microcantilever; frequency response; fluid cell; liquid AFM; microcantilever; frequency response; fluid cell; liquid





Autor: Ramin Motamedi and Paula M. Wood-Adams *

Fuente: http://mdpi.com/



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