Rolling resistance moment of microspheres on surfaces: contact measurements

Ding, Weiqiang; Howard, Andrea J.; Peri, M. D. Murthy; Cetinkaya, Çetin

doi:10.1080/14786430701708356

Cited by 49 publications

(62 citation statements)

References 13 publications

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“…In a somewhat similar study, Ding and co-workers moved PSL microspheres across a flat silicon substrate, by pushing the spheres with an AFM cantilever [7]. The diameters of the spheres used varied between 22.5 and 26.8 µm.…”

Section: Critical Displacementmentioning

confidence: 99%

“…As a direct consequence, a 1 and a 2 will change (we will take subscript 1 to refer to the trailing half, in accordance with figure 1(b)). As a result of a 1 and a 2 changing, the strain energy release rates will start to differ from γ as dictated by (7). Initially however, γ < G 1 < G op , and the crack is unable to open at the trailing edge, effectively pinning the contact.…”

Section: The Onset Of Rollingmentioning

confidence: 99%

“…Still, numerous authors have succeeded using very different techniques, including manipulating single [7,8] or chains of microspheres [9] with an atomic force microscope (AFM), resolving restructuring events in time [5,10], and non-contact techniques [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rolling friction of adhesive microspheres

Krijt¹,

Dominik²,

Tielens³

2014

J. Phys. D: Appl. Phys.

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The rolling friction of adhesive microspheres is an important quantity as it determines the strength and stability of larger aggregates. Current models predict rolling forces that are 1 to 2 orders of magnitude smaller than observed experimentally. Starting from the well-known Johnson-Kendall-Roberts (JKR) contact description, we derive an analytical theory for the rolling friction based on the concept of adhesion hysteresis, e.g. a difference in apparent surface energies for opening/closing cracks. We show how adhesion hysteresis causes the pressure distribution within the contact to become asymmetrical, leading to an opposing torque. Analytical expressions are derived relating the size of the hysteresis, the rolling torque, and the rolling displacement, ξ . We confirm the existence of a critical rolling displacement for the onset of rolling, the size of which is set by the amount of adhesion hysteresis and the size of the contact area. We demonstrate how the developed theory is able to explain the large rolling forces and particle-size dependence observed experimentally. Good agreement with experimental results is achieved for adhesion hysteresis values of ( γ /γ ) 3 for polystyrene, and ( γ /γ ) 0.5 for silicates, at crack propagation rates of 0.1 µm s −1 and 1-10 µm s −1 , respectively.

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Section: Critical Displacementmentioning

confidence: 99%

Section: The Onset Of Rollingmentioning

confidence: 99%

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Rolling friction of adhesive microspheres

Krijt¹,

Dominik²,

Tielens³

2014

J. Phys. D: Appl. Phys.

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“…For example, cells on a cyclically stretched substrate tend to reorient themselves away from the stretching direction [23][24][25][26][27], and cells migrate along a substrate with rigidity gradient (durotaxis) [18]. Blood cells are found to undergo a transition from rolling to translational motion on a blood vessel wall under increasing hydrodynamic shear forces [19], exemplifying a general fact that it takes less effort for a round object to roll than to slip on a substrate [28,29].…”

Section: Introductionmentioning

confidence: 99%

Biomimetic study of rolling transport through smooth muscle contraction

Chen

Gao

2014

Colloids and Surfaces B: Biointerfaces

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“…N r is the laterally pushing force applied by the right gripping arm, and F r is the adhesion force from the gripping arm in the normal direction. Upon the application of N r , the stress distribution in the contact area between the microsphere and the substrate becomes nonuniform, which creates a rolling-resistance moment M s [45], [46]. Other than the adhesion forces F s and F r that are normal to the flat surfaces, f s and f r are additional capillary forces from the substrate and the gripping arm, respectively.…”

Section: Force Analysismentioning

confidence: 99%

Active Release of Microobjects Using a MEMS Microgripper to Overcome Adhesion Forces

Chen¹,

Zhang²,

Sun

2009

J. Microelectromech. Syst.

113

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Abstract-Due to force scaling laws, large adhesion forces at the microscale make rapid accurate release of microobjects a longstanding challenge in pick-place micromanipulation. This paper presents a new microelectromechanical systems (MEMS) microgripper integrated with a plunging mechanism to impact the microobject for it to gain sufficient momentum to overcome adhesion forces. The performance was experimentally quantified through the manipulation of 7.5-10.9-µm borosilicate glass spheres in an ambient environment under an optical microscope. Experimental results demonstrate that this microgripper, for the first time, achieves a 100% successful release rate (based on 200 trials) and a release accuracy of 0.70 ± 0.46 µm. Experiments with conductive and nonconductive substrates also confirmed that the release process is not substrate dependent. Theoretical analyses were conducted to understand the release principle. Based on this paper, further scaling down the end structure of this microgripper will possibly provide an effective solution to the manipulation of submicrometer-sized objects.[

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Rolling resistance moment of microspheres on surfaces: contact measurements

Cited by 49 publications

References 13 publications

Rolling friction of adhesive microspheres

Rolling friction of adhesive microspheres

Biomimetic study of rolling transport through smooth muscle contraction

Active Release of Microobjects Using a MEMS Microgripper to Overcome Adhesion Forces

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