The Brownian motion of colloidal particles in quasi-two-dimensional (q2D)
confinement displays a distinct kinetic character from that in bulk. Here we
experimentally report dynamic coupling motion of Brownian particles in a
relatively long process (∼100 h), which displays a quasi-equilibrium state in the
q2D system. In the quasi-equilibrium state, the q2D confinement results in the
coupling of particle motions, which slowly damps the motion and interaction of
particles until the final equilibrium state is reached. The process of approaching
the equilibrium is a random relaxation of a many-body interaction system of
Brownian particles. As the relaxation proceeds for ∼100 h, the system reaches
the equilibrium state in which the energy gained by the particles from the
stochastic collision in the whole system is counteracted by the dissipative energy
resulting from the collision. The relaxation time of this stochastic q2D system is
17.7 h. The theory is developed to explain coupling motions of Brownian particles
in q2D confinement.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:80337 |
| Date | 08 August 2022 |
| Creators | Ma, Jun, Jing, Guangyin |
| Publisher | IOP Publishing |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 073025 |
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