Enhanced adhesion of bioinspired nanopatterned elastomers via colloidal surface assembly

Autor: Sabine Akerboom, Marleen Kamperman, David Labonte, Joris Sprakel, Jeroen Appel, Walter Federle
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Light
Laboratorium voor Fysische chemie en Kolloïdkunde
Nanoparticle
dry adhesives
Microscopy
Atomic Force
Biochemistry
chemistry.chemical_compound
air-water-interface
crystals
Nanotechnology
Scattering
Radiation
Physical Chemistry and Colloid Science
Research Articles
Air
rapid fabrication
Hydrogen-Ion Concentration
soft
Crystallization
Biotechnology
Materials science
Friction
Surface Properties
Biomedical Engineering
Biophysics
elastic wavy surface
Bioengineering
Elastomer
Biophysical Phenomena
Biomaterials
gecko foot-hair
solids
Monolayer
Colloids
Dimethylpolysiloxanes
Particle Size
VLAG
Ions
Polydimethylsiloxane
large-area
technology
industry
and agriculture
Water
monolayers
Chemical engineering
chemistry
Microscopy
Electron
Scanning
Nanoparticles
Polystyrenes
Self-assembly
Particle size
Adhesive
Polystyrene
Zdroj: Journal of the Royal Society, Interface, 12
Journal of the Royal Society, Interface 12 (2015)
ISSN: 1742-5689
Popis: 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.
Databáze: OpenAIRE
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