title: Asymmetric hetero-assembly of colloidal nanoparticles through "crash reaction" in a centrifugal field.
abstract: Asymmetric hetero-assembly of two kinds of colloidal nanoparticles (NPs) was achieved by "crash reaction" in a density gradient centrifugation system using Au NPs as an example. Centrifugal force was applied to overcome the Brownian motion effect and cause NPs' directional movements. A water-oil interface was introduced to increase the effective collision probability.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China. sunxm@mail.buct.edu.cn.
authors.forename: Sha
authors.initials: S
authors.lastname: Song
authors.forename: Yun
authors.initials: Y
authors.lastname: Kuang
authors.forename: Liang
authors.initials: L
authors.lastname: Luo
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Sun
mesh_terms: D003102:Colloids; D019855:Ethylene Glycol / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009821:Oils / Q000737:chemistry; D014461:Ultracentrifugation; D014867:Water / Q000737:chemistry
chemical_list: D003102:Colloids; D009821:Oils; D014867:Water; D006046:Gold; D019855:Ethylene Glycol