Actuated colloids are excellent model systems to investigate emerging out-of-equilibrium structures, complex collective dynamics and design rules for next-generation materials. In a new report, Koohe Han and a research team ...
Different forms of carbon or allotropes including graphene and diamond are among the best conductors of heat. In a recent report on Science, Yo Machida and a research team in the department of Physics and the Laboratory of ...
(Phys.org)—As long as the temperature is above absolute zero, gas molecules are always in constant random motion. They may diffuse—or spread out—through three-dimensional space or, in a process called "surface diffusion," ...
(Phys.org)—Just in time for the holidays, scientists have unraveled some of the chemistry behind the diffusion of CO2 molecules in a glass of Champagne. Among their findings, they discovered that ethanol is the main molecule ...
Using the Hubble Space Telescope (HST) and Jansky Very Large Array (VLA), astronomers have investigated an ultra-diffuse galaxy known as UGC 9050-Dw1. Results of the study, published June 9 on the pre-print server arXiv, ...
Using the Subaru telescope and the Canada-France-Hawaii Telescope (CFHT), an international team of astronomers has observed an ultra-diffuse galaxy known as F8D1. The observational campaign has revealed an enormous tidal ...
Astronomers from the University of Arizona (UA) and elsewhere report the discovery of a new ultra-faint dwarf galaxy. The newfound galaxy, designated Tucana B, is the first quenched and isolated object of this type identified ...
Perovskite materials are low-cost, solution-processable semiconductors that can absorb and convert solar energy with extraordinarily high efficiencies, making them promising material for use in applications such as photovoltaic ...
Materials Science
Feb 10, 2022
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140
Nanoparticles have applications as therapeutic agents for joint diseases such as osteoarthritis. But the role of nanoparticle diffusion in synovial fluid or the fluid inside the joint is incompletely understood. In a new ...
Batteries and fuel cells often rely on a process known as ion diffusion to function. In ion diffusion, ionized atoms move through solid materials, similar to the process of water being absorbed by rice when cooked. Just like ...
General Physics
May 31, 2021
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411
Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical distribution in space is given by the diffusion equation. The concept of diffusion is tied to that of mass transfer driven by a concentration gradient. Diffusion is invoked in the social sciences to describe the spread of ideas.
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