EVIDENCE FOR VAN DER WAALS ADHESION IN GECKO SETAE PDF

We provide the first direct experimental evidence for dry adhesion of gecko setae by van der Waals forces, and reject the use of mechanisms relying on high. Fig. 1. Force of gecko setae on highly polarizable surfaces versus for surface hydrophobicity. (A) Wet adhesion prediction. (B) van der Waals prediction. Functionally, the properties of gecko setae are as extraordinary as their structure: .. the first direct evidence that intermolecular forces are responsible for hypothesis that van der Waals forces are sufficient for gecko adhesion by reanalyzing.

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The mechanism adhwsion dry adhesion in the millions of setae on the toes of geckos has been the focus of scientific study for over a century. A van der Waals mechanism implies that the remarkable adhesive properties of gecko setae are merely a result of the size and shape of the tips, and are not strongly affected by surface chemistry.

Dder predicts greater adhesive forces simply from subdividing setae to increase surface density, and suggests a possible design principle underlying the repeated, convergent evolution of dry adhesive microstructures in gecko, anoles, skinks, and insects. Geckos have evolved one of the most versatile and effective adhesives known. B van der Waals prediction. C Results from toe on highly polarizable semiconductor wafer surfaces differing in hydrophobicity.

We provide the first direct experimental evidence for dry adhesion of gecko setae by van der Waals forces, and reject the use of mechanisms relying on high surface polarity, including capillary adhesion.

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See our FAQ for additional information. Citations Publications citing evldence paper. We provide the first direct experimental evidence for dry adhesion of gecko setae by van der Waals forces, and reject the use of mechanisms relying on high surface polarity, including capillary adhesion.

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Configuration of the setal fields of Rhoptropus Gekkota: NiewiarowskiAli Dhinojwala Integrative and comparative biology Sauer Computer methods in biomechanics and biomedical…. NiewiarowskiAli Dhinojwala Integrative and comparative biology References Publications referenced by this paper. Geccko Publications citing this paper. GlickSrinivasan A.

Evidence for van der Waals adhesion in gecko setae.

Evidence for van der Waals adhesion in gecko setae. Multiscale modelling and simulation of the deformation and adhesion of a single gecko seta. Mechanical Design in Organisms. Topics Discussed in This Paper. The mechanism of dry adhesion in the millions of setae on the toes evidenec geckos has been the focus of scientific study for over a century.

Reduction of water surface tension significantly impacts gecko adhesion underwater. Estimates using a standard adhesion model and our measured forces come remarkably close to predicting the tip size of Tokay gecko seta. Adhesion of a single isolated gecko seta was equally effective on the hydrophobic and hydrophilic surfaces of a microelectro-mechanical systems force sensor.

Evidence for van der Waals adhesion in gecko setae.

Contact between rough surfaces and a criterion for macroscopic adhesion. Robbins Proceedings egcko the National Academy of Sciences…. We provide the first direct experimental evidence for dry adhesion of gecko setae by van der Waals forces, and reject the use of mechanisms relying on high surface polarity, including capillary adhesion.

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Showing of extracted citations. Therefore, we reject the hypothesis that wet, capillary interactions are necessary for gecko adhesion in favor of the van der Waals gfcko. References Publications referenced by this paper. Liang and Anne M. Kitasatospora setae Search for additional papers on this topic. Semantic Scholar estimates that this publication has citations based on the available data.

The toes of live Tokay geckos were highly hydrophobic, and adhered equally well to strongly hydrophobic and strongly hydrophilic, polarizable surfaces. D Results from single seta attaching to highly polarizable MEMS cantilevers differing in hydrophobicity. From This Paper Figures, tables, adheion topics from this paper.

Adhesion to hydrophilic and hydrophobic polarizable surfaces was similar. Geckos have evolved one of the most versatile and effective adhesives known.

Kenny and Ronald S. Citation Statistics Citations 0 50 ’02 ’05 ’09 ’13 ‘ GlickSrinivasan A. SureshDonald RuffattoMark R. Biological Mechanisms of Attachment Professor Dr. Liang and Anne M.