Film-terminated Ridge-Channel Structure strongly enhances sliding friction by a mechanism involving internal folding and unfolding as well as unstable release of elastic energy.
Fibrils with a Roof
As mimics of fibrillar structures found in lizards and ants, we have fabricated and studied a “fibrils with roof” structure. It has significantly enhanced contact compliance and adhesion compared to a flat control sample made of the same material, (poly) dimethylsiloxane, PDMS.
See the following and follow-up papers.
“Biologically inspired crack trapping for enhanced adhesion,” Nicholas J. Glassmaker*, Anand Jagota*,† Chung-Yuen Hui‡, William L. Noderer*, and Manoj K. Chaudhury* Proceedings of the National Academy of Sciences , 104 (26) 10786-10791 (2007).
“Enhanced Adhesion and Compliance of Film-Terminated Fibrillar Surfaces”, W.L. Noderer, L. Shen, S. Vajpayee, N.J. Glassmaker, A. Jagota, C-Y. Hui, Proceedings of the Royal Society A , 4632631-2654 (2007).
The “Fibrils with Roof” architecture has strongly enhanced static adhesion. Surprising, at the same time, its sliding friction properties are essentially unchanged.