2010
Abstract: Robotic microhandling is disturbed by the adhesion phenomenon between the micro-object and the grippers. This phenomenon is directly linked to both the object and the gripper surface chemical composition. We propose to control adhesion by using chemical self-assembly monolayer (SAM) on both surfaces. Previous distance-force measurements done with AFM have shown that the liquid pH can be used to modify the adhesion and created repulsive force between the gripper fingers and the micro-objet. This paper shows the…
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2011
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Cited by 2 publications
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References 9 publications
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“…9,[27][28][29] The last technique allows to switch the force from attractive to repulsive by pH solution modification and improves the micro-object manipulation. 27,30,31 In case of randomly rough surfaces, fractal approach is one of the most usual way to predict wear, adhesion force or interaction forces. [32][33][34] Thanks to the surface structuring, we can reduce the contact area between the gripper and the objects, and in turn this will decrease the contact area and van der Waals forces.…”
mentioning
confidence: 99%
“…9,[27][28][29] The last technique allows to switch the force from attractive to repulsive by pH solution modification and improves the micro-object manipulation. 27,30,31 In case of randomly rough surfaces, fractal approach is one of the most usual way to predict wear, adhesion force or interaction forces. [32][33][34] Thanks to the surface structuring, we can reduce the contact area between the gripper and the objects, and in turn this will decrease the contact area and van der Waals forces.…”
mentioning
confidence: 99%
“…The pull-off force is not well understood and must be studied further to enable the advent of reliable micromanipulation techniques. Current methods to measure micro/nanoforces between surfaces are the surface force apparatus (SFA), , the atomic force microscope (AFM), − capacitive force sensors, or nanoindentation testers. , The modeling of pull-off force is mainly based on the different approaches based on the surface energies on the contact, − on the integration of the van der Waals forces between objects, − or on some hybrid approaches between both. , The adhesion force reduction was already obtained in liquid and dry medium by surface structuring − or chemical functionalization. ,− The last technique allows the switch of the force from attractive to repulsive by pH solution modification and improves the micro-object manipulation. ,, In the case of randomly rough surfaces, the fractal approach is one of the most usual ways to predict wear, adhesion force, or interaction forces. − …”
mentioning
confidence: 99%
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