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Friction between soft contacts at nanoscale on uncoated and protein-coated surfaces
- Publication Year :
- 2021
- Publisher :
- Royal Society of Chemistry, 2021.
-
Abstract
- The understanding of friction on soft sliding biological surfaces at the nanoscale is poorly understood as hard interfaces are frequently used as model systems. Herein, we studied the influence of elastic modulus on the frictional properties of model surfaces at the nanoscale for the first time. We prepared model silicone-based elastomer surfaces with tuneable modulus ranging from hundreds of kPa to a few MPa, similar to those found in real biological surfaces, and employed atomic force microscopy to characterize their modulus, adhesion, and surface morphology. Consequently, we used friction force microscopy to investigate nanoscale friction in hard-soft and soft-soft contacts using spherical colloidal probes covered by adsorbed protein films. Unprecedented results from this study reveal that modulus of a surface can have a significant impact on the frictional properties of protein-coated surfaces with higher deformability leading to lower contact pressure and, consequently, decreased friction. These important results pave the way forward for designing new functional surfaces for serving as models of appropriate deformability to replicate the mechanical properties of the biological structures and processes for accurate friction measurements at nanoscale.
- Subjects :
- Materials science
Friction
Surface Properties
Modulus
02 engineering and technology
Microscopy, Atomic Force
010402 general chemistry
Elastomer
01 natural sciences
chemistry.chemical_compound
Colloid
Silicone
Elastic Modulus
Microscopy
General Materials Science
Composite material
Elastic modulus
Nanoscopic scale
integumentary system
Proteins
Adhesion
021001 nanoscience & nanotechnology
musculoskeletal system
0104 chemical sciences
chemistry
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20403364
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....4706f8678ea6ef9ade7b5e9bc950b40f