Analytical model of adhesion for analyzing biological and synthetic nanostructured fibrillar adhesive pads

Parsaiyan, Hady; Barazandeh, Farshad; Rezaei, Seyed Mehdi; Safdari, Masoud

doi:10.1109/estc.2008.4684515

Cited by 1 publication

(1 citation statement)

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“…However, the large majority of insects rely on a wet adhesive system where the van der Waals forces are reinforced by additional effects, such as the secretion of oily fluids [1][2][3][4]. Different hypotheses and various mechanical models are presented to explain the adhesive nature of adhesive systems for specific fibre-array structures [5][6][7][8]. Experimental works have risen in line with these theoretical models [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study of a Novel Microfabricated Fibrillar Structure

Parsaiyan

Barazandeh

Nejad

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part L:

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Survival of species such as geckos, spiders, flies, and crickets crucially depends on the interaction between hundreds of thousands of hairs or setae on their feet. Recently, many efforts have been made to fabricate adhesive pads inspired by natural biological systems. Fibres developed from nano molding can mimic the hairs of these species' feet and act as a dry adhesive pad. In this study, for the nanocasting of nano fibres, several porous silicon structures with desired dimensional and morphological characteristics were made by an electrochemical etching system. The adhesive strengths of produced adhesive pads were measured about 0.07 N/cm 2 in the normal direction and about 0.045 N/cm 2 in the shear direction in contact with a glass surface. Besides the experimental work, a quantitative model has been developed to model van der Waals interactions in adhesive pads. The results from the theoretical model show consistency with experiments.

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