Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2010-03-09
Physics
Condensed Matter
Statistical Mechanics
Scientific paper
At fast timescales, the self-similarity of random Brownian motion is expected to break down and be replaced by ballistic motion. So far, an experimental verification of this prediction has been out of reach due to a lack of instrumentation fast and precise enough to capture this motion. With a newly developed detector, we have been able to observe the Brownian motion of a single particle in an optical trap with 75 MHz bandwidth and sub-{AA}ngstrom spatial precision. We report the first measurements of ballistic Brownian motion as well as the first determination of the velocity autocorrelation function of a Brownian particle. The data are in excellent agreement with theoretical predictions taking into account the inertia of the particle and the surrounding fluid as well as hydrodynamic memory effects.
Florin Ernst-Ludwig
Huang Rongxin
Jeney Sylvia
Lukić Branimir
No associations
LandOfFree
Direct observation of ballistic Brownian motion on a single particle does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Direct observation of ballistic Brownian motion on a single particle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct observation of ballistic Brownian motion on a single particle will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-340946