title: Size and size distribution balance the dispersion of colloidal CeO2 nanoparticles in organic solvents.
abstract: Colloidal CeO2 nanoparticles (HNPs) stabilized with a decanoic fatty acid self-assembled monolayer (SAM) (decHNPs) showed very good dispersibility, i.e., perfect dispersion in cyclohexane up to 20 wt%. However, the HNPs stabilized with a dodecanoic acid SAM (dodHNPs) did not show good dispersion, i.e., at most 0.2 wt%. Interestingly, when we mixed equal portions of 5 wt% decHNPs in cyclohexane and 2 wt% dodHNPs in cyclohexane, the mixture showed much better dispersion than 1 wt% of dodHNPs in cyclohexane. This might indicate that the size and size distribution of the major components of the HNP solution are the most dominant factors for determining the dispersibility of HNPs in solution.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aobaku, Sendai 980-8577, Japan. tarita@tagen.tohoku.ac.jp
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Arita
authors.forename: Jungwoo
authors.initials: J
authors.lastname: Yoo
authors.forename: Yu
authors.initials: Y
authors.lastname: Ueda
authors.forename: Tadafumi
authors.initials: T
authors.lastname: Adschiri
mesh_terms: D002563:Cerium / Q000737:chemistry*; D003510:Cyclohexanes / Q000737:chemistry; D007850:Lauric Acids / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012997:Solvents / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003510:Cyclohexanes; D007850:Lauric Acids; D012997:Solvents; C030358:lauric acid; D002563:Cerium; C506365:Cyclohexane; C030583:ceric oxide