CUED Publications database

Enhanced adhesion of bioinspired nanopatterned elastomers via colloidal surface assembly.

Akerboom, S and Appel, J and Labonte, D and Federle, W and Sprakel, J and Kamperman, M (2015) Enhanced adhesion of bioinspired nanopatterned elastomers via colloidal surface assembly. J R Soc Interface, 12. 20141061-.

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Abstract

We describe a scalable method to fabricate nanopatterned bioinspired dry adhesives using colloidal lithography. Close-packed monolayers of polystyrene particles were formed at the air/water interface, on which polydimethylsiloxane (PDMS) was applied. The order of the colloidal monolayer and the immersion depth of the particles were tuned by altering the pH and ionic strength of the water. Initially, PDMS completely wetted the air/water interface outside the monolayer, thereby compressing the monolayer as in a Langmuir trough; further application of PDMS subsequently covered the colloidal monolayers. PDMS curing and particle extraction resulted in elastomers patterned with nanodimples. Adhesion and friction of these nanopatterned surfaces with varying dimple depth were studied using a spherical probe as a counter-surface. Compared with smooth surfaces, adhesion of nanopatterned surfaces was enhanced, which is attributed to an energy-dissipating mechanism during pull-off. All nanopatterned surfaces showed a significant decrease in friction compared with smooth surfaces.

Item Type: Article
Uncontrolled Keywords: adhesion bioinspiration colloidal lithography nanopatterned surfaces self-assembly Air Biophysical Phenomena Colloids Crystallization Dimethylpolysiloxanes Friction Hydrogen-Ion Concentration Ions Light Microscopy, Atomic Force Microscopy, Electron, Scanning Nanoparticles Nanotechnology Particle Size Polystyrenes Scattering, Radiation Surface Properties Water
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:42
Last Modified: 17 Nov 2017 20:19
DOI: