Binding force measurement using force-sensing piezoresistive cantilevers was accomplished, to evaluate binding between micro-scale SiO2 flat surfaces in an HCl solution for fluidic micro-self-assembly. We measured binding force between a cylindrical microparticle and a substrate by pushing the particle with the cantilever. We successfully measured the binding force in nano-newton order caused by van der Waals' interaction, and revealed that the phenomenon observed in colloid particles occurred similarly in micro-scale flat surfaces.

References :
Hiroaki Onoe, Murat Gel, Kazunori Hoshino, Kiyoshi Matsumoto, Isao Shimoyama, “Binding Force Measurement between Micro-Scale Flat Surfaces in Aqueous Environmnet by Force-Sensing Piezoresistive Micro-Cantilevers,” 18th IEEE International Conference on Micro Electro Mechanical Systems (MEMS '05), pp. 16-19, Miami, Fulorida, USA, Jan. 30-Feb. 3, 2005. [Proceedings]

Hiroaki Onoe, Murat Gel, Kazunori Hoshino, Kiyoshi Matsumoto, Isao Shimoyama, “Direct Measurement of the Binding Force between Micro-Fabricated Particles and a Planar Surface in Aqueous Solution by Force-Sensing Piezoresistive Cantilevers,” Langmuir, vol. 21, no. 24, pp. 11251-11261, 2005. [Paper]

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