Lee E.Yen C.-B.Hsu J.-P.2019-05-202019-05-20200015206106https://scholars.lib.ntu.edu.tw/handle/123456789/409388The sedimentation of a nonconducting spherical particle in a spherical cavity is analyzed theoretically. We show that, for the case where the former is positively charged and the latter uncharged, the sedimentation velocity of the particle decreases with £ea, £e and a being respectively the reciprocal Debye length and the radius of a particle. If the surface potential of the particle £p r is high, the sedimentation potential has a local maximum as £ea varies, which becomes inappreciable if the surface potential is low. If £p r is sufficiently high, the sedimentation potential has a local maximum as £f (= radius of particle/radius of cavity) varies. It is not observed, however, if £ea is large. If an uncharged particle is placed in a positively charged cavity, the sedimentation potential may reverse its sign, and may have a local minimum as £ea varies. ? 2000 American Chemical Society.journal article2-s2.0-0034226070https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034226070&partnerID=40&md5=2dab14692771dc1341d94de69508fcb9