2011/07/13 by Gary L. Hunter, Kazem V. Edmond, Mark T. Elsesser +1 · 57 citations
Materials Science · Mathematics · Physics and Astronomy · #Brownian dynamics #Brownian motion #Cluster (spacecraft) #Colloid #Confocal #Material Dynamics and Properties #Optical tweezers #Particle (ecology) #Pickering emulsions and particle stabilization #Point processes and geometric inequalities #Rotation around a fixed axis #Rotational diffusion #Tracking (education) #cond-mat.soft
paper · pdf · open access · doi:10.1364/oe.19.017189
published in Optics Express 19(18), 17189 (Optica Publishing Group) · 14 pages, 6 figures. Submitted to Optics Express
arxiv created 2011/07/13 · openalex publication_date 2011/08/17 · arxiv updated 2011/09/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We describe a novel method of tracking the rotational motion of clusters of colloidal particles. Our method utilizes rigid body transformations to determine the rotations of a cluster and extends conventional proven particle tracking techniques in a simple way, thus facilitating the study of rotational dynamics in systems containing or composed of colloidal clusters. We test our method by measuring dynamical properties of simulated Brownian clusters under conditions relevant to microscopy experiments. We then use the technique to track and describe the motions of a real colloidal cluster imaged with confocal microscopy.