The role of few-asperity contacts in adhesion

Thoreson, E. J.; Martin, Jack; Burnham, Nancy A.

doi:10.1016/j.jcis.2005.11.054

Cited by 44 publications

(24 citation statements)

References 25 publications

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“…[19][20][21]23,24 This model has been chosen in spite of DMT or JKR model in order to build a model which can be easily extended in smaller spheres. Indeed, we are going to show that in case of nanosphere (radius<100nm), the distance interaction with more that one sphere in the plane should be considered.…”

Section: Interaction Force Modelingmentioning

confidence: 99%

“…13,14 The modeling of pull-off force are mainly based on two different approaches based on the surface energies on the contact, [15][16][17][18] or on the integration of the van der Waals forces between objects [19][20][21] and on some hybrid approaches between both. 23,24 We propose to control the surface forces between objects and grippers by surface nanostruc-ture arrays in order to decrease the adhesion. The authors have already demonstrated that surface chemical functionalisation can decrease adhesion forces 9 and switch them 25 in air and dry mediums respectively.…”

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confidence: 99%

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Reducing the Adhesion between Surfaces Using Surface Structuring with PS Latex Particle

Dejeu

Bechelany

Philippe

et al. 2010

ACS Appl. Mater. Interfaces

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The adhesion between a micro-object and a microgripper end-effector is an important problem in micromanipulation. Canceling or reducing this force is a great challenge. This force is directly linked to the surface chemical structure of the object and the gripper. We propose to reduce the adhesion force by using a self-assembled monolayer structuring on one surface. The surface was structured by polystyrene latex particles (PS particles) with radii from 100 to 1500 nm. The adhesion force measurements obtained by AFM were compared to a multisphere van der Waals force model. The model suggests the existence of an optimal value of the sphere radius which minimizes the adhesion. In that case, the pull-off force is reduced to 20 nN by the PS particles layer with a radius of 45 nm. A wide range of applications in the field of telecommunications, bioengineering, and more generally speaking, MEMS can be envisaged for these substrates.

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Section: Interaction Force Modelingmentioning

confidence: 99%

mentioning

confidence: 99%

Reducing the Adhesion between Surfaces Using Surface Structuring with PS Latex Particle

Dejeu

Bechelany

Philippe

et al. 2010

ACS Appl. Mater. Interfaces

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show abstract

“…These models usually focus on the average adhesion force and are appropriate for large contact areas, such as for instance adhesion in MEMS [9], or surface force apparatus measurements [20]. They are less suited for describing particle/surface adhesion where a few asperities are in contact [21].…”

Section: Introductionmentioning

confidence: 99%

Adhesion between highly rough alumina surfaces: An atomic force microscope study

Audry

Ramos

Charlaix

2009

Journal of Colloid and Interface Science

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“…13,14 The modeling of pull-off force is mainly based on two different approaches based on the surface energies on the contact, [15][16][17][18] or on the integration of the van der Waals forces between objects [19][20][21][22] and on some hybrid approaches between both. 23,24 The adhesion force reduction was already obtained in liquid and dry medium by surface structuring [24][25][26] or chemical functionalisation. 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.…”

mentioning

confidence: 99%

Adhesion Control for Micro- and Nanomanipulation

et al. 2011

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The adhesion between a micro/nano-object and a micro-gripper end-effector is an important problem in micromanipulation. Cancelling or reduction this force is a great challenge.This force is directly linked to the surface chemical structure of the object and the gripper. We propose to predict this force between a structuring surface and a micro-object with a multisphere van der Waals force model. The surface was structured by polystyrene latex particles (PS particles) with radii from 35 to 2000 nm. The model was compared with experimental pulloff force measurement performed by AFM with different natures of spheres materials glued on the tipless. A wide range of applications, in the field of telecommunications, bioengineering, and more generaly speaking MEMS can be envisaged for these substrates. † FEMTO-ST Institute ‡ IEMM ¶ EMPA

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The role of few-asperity contacts in adhesion

Cited by 44 publications

References 25 publications

Reducing the Adhesion between Surfaces Using Surface Structuring with PS Latex Particle

Reducing the Adhesion between Surfaces Using Surface Structuring with PS Latex Particle

Adhesion between highly rough alumina surfaces: An atomic force microscope study

Adhesion Control for Micro- and Nanomanipulation

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