Search results for Brownian motion

Quantum Physics Jan 19, 2018

Information engine operates with nearly perfect efficiency

Physicists have experimentally demonstrated an information engine—a device that converts information into work—with an efficiency that exceeds the conventional second law of thermodynamics. Instead, the engine's efficiency ...

Materials Science Jan 15, 2018

The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Mathematics Jan 2, 2018

Maths for midges that pull 10g

Midges move with ferocious randomness, frequently subjecting themselves to accelerations of more than 10g, well beyond the limit of fighter pilots, as they duck and dive in swarms that still retain an almost paradoxical cohesiveness ...

Materials Science Oct 25, 2017

Researchers developing a new type of synthetic molecular machine

Researchers at the University of Twente's research institute MESA+ are constructing  molecular machines capable of exerting a measurable force at nanoscale and in fluid environment. The design of these machines is based ...

Quantum Physics Oct 24, 2017

Experiments with levitated nanoparticles reveal role of friction at the nanoscale

Transitions occurring in nanoscale systems, such as a chemical reaction or the folding of a protein, are strongly affected by friction and thermal noise. Almost 80 years ago, the Dutch physicist Hendrik Kramers predicted ...

Soft Matter Oct 17, 2017

Team uses magnetic beads to model microscopic proteins, polymers

An engineered string of micronwide beads may take up the slack where computer modeling fails researchers who study the bending, folding and other movements of polymers or biomolecules like actin and DNA.

Quantum Physics Oct 16, 2017

Violation of the exponential decay law discovered in open quantum systems

(Phys.org)—Ever since the early days of quantum mechanics, the decay dynamics of unstable quantum systems has been thought to follow an exponential decay law, just like the one used to describe radioactive decay and many ...

Evolution Oct 12, 2017

An evolving sticky situation

While many animals try to avoid sticky situations, lizards evolved to seek them out.

Mathematics Sep 27, 2017

On a collision course with game theory

How do pedestrians behave in a large crowd? How do they avoid collisions? How can their paths be modeled? A new approach developed by mathematicians from Würzburg and Nice provides answers to these questions.

Cell & Microbiology Aug 30, 2017

Motorized molecules drill through cells, destroy diseased cells

Motorized molecules driven by light have been used to drill holes in the membranes of individual cells and show promise for either bringing therapeutic agents into the cells or directly inducing the cells to die.

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