Influence of Fluid Cell Design on the Frequency Response of AFM Microcantilevers in Liquid Media

Sensors

Ramin Motamedi¹ 

[1] 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 H3G 1M8; E-Mail

关键词: AFM;    microcantilever;    frequency response;    fluid cell;    liquid;   

DOI  :  10.3390/s8095927

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.