Force Spectroscopy with Quantitative On-Cantilever Force Control

Proceedings

Sierakowski, Andrzej¹  Orlowska, Karolina²  Majstrzyk, Wojciech³  Dobrowolski, Rafał⁴ 

[1] Author to whom correspondence should be addressed.;Division of Silicon Microsystem and Nanostructure Technology, Institute of Electron Technology, 02-668 Warsaw, Poland;Faculty of Microsystem Electronics and Photonics, Wroclaw University of Technology, 50-372 Wrocław, Poland;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

关键词: Lorentz force;    electromagnetic actuation;    adhesion forces;    cantilever sensor;    active cantilever;   

DOI  :  10.3390/proceedings2130915

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

In this work we propose a method for on-cantilever force control for application in force distance (F-z) spectroscopy for intermolecular interaction sensing. In this method we perform the F-z measurements with cantilevers integrating functionalized spheres attached to them. The F-z curve is obtained by controlling the Lorentz force acting at the cantilever free end. The intermolecular interaction forces are measured by measuring the force necessary to retract the cantilever from the surface. The required force is generated by the current passing through the cantilever. In this scenario we monitor the bending of cantilevers using optical beam deflection (OBD) method. Moreover, as deflection of the cantilever was electromagnetically controlled it was possible to calibrate the OBD response as well.

【 授权许可】

CC BY