At the nanoscale, graphite can turn friction upside down
(Phys.org)—If you ease up on a pencil, does it slide more easily? Sure. But maybe not if the tip is sharpened down to nanoscale dimensions. A team of researchers at the National Institute of Standards and Technology (NIST) has discovered that if graphite (the material in pencil "lead") is sticky enough, as measured by a nanoscale probe, it actually becomes harder to slide a tip across the material's surface as you decrease pressure—the exact opposite of our everyday experience.
At the nanoscale, graphite can turn friction upside down
(Phys.org)—If you ease up on a pencil, does it slide more easily? Sure. But maybe not if the tip is sharpened down to nanoscale dimensions. A team of researchers at the National Institute of ...
Wed 17 Oct 12 from Phys.org
At the nanoscale, graphite can turn friction upside down, Wed 17 Oct 12 from R&D Mag
Negative friction surprises researchers
Force increases with decreasing load
Thu 18 Oct 12 from Physics World
Graphite Demonstrates Negative Coefficient of Friction at Nanoscale
If you ease up on a pencil, does it slide more easily? Sure. But maybe not if the tip is sharpened down to nanoscale dimensions. A team of researchers at the National Institute of Standards ...
Wed 17 Oct 12 from AZoNano
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