Details

Autor(en) / Beteiligte

• Hanasaki, Itsuo
• Hosokawa, Chie

Titel

Time-scale dependent Brownian motion of nanoparticles in clusters at a solid-liquid interface by laser trapping

Ist Teil von

• Journal of physics. Conference series, 2019-05, Vol.1220 (1), p.12054

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract Nanoparticles in a cluster trapped by laser-induced force field show Brownian motion at solid-liquid interfaces. The cluster formation means that the particles are highly concentrated. In general, the diffusion coefficients of particles in fluids decrease with substantially high concentration and also in the vicinity of solid walls due to the hydrodynamic effect. The particle trajectory data obtained from the experimental measurements show that the longer time span of observation leads to smaller diffusion coefficient due to the confinement effect. However, they also exhibit higher diffusion coefficient compared to the the bulk condition when evaluated at a sufficiently short time span of the frame interval under the condition of sufficiently high laser powers.