title: Oxidation of PtNi nanoparticles studied by a scanning X-ray fluorescence microscope with multi-layer Laue lenses.
abstract: We report a study of the oxidation process of individual PtNi nanoparticles (NPs) conducted with a novel scanning multi-layer Laue lens X-ray microscope. The elemental maps reveal that alloyed PtNi NPs were transformed into Pt/NiO core-shell NPs by thermal oxidation. The observations furthermore indicate that a coalescence of Pt/NiO core-shell NPs occurred during oxidation.
authors.affiliation: Department of Advanced Engineering Materials, Chosun University, Gwangju 501-759, Republic of Korea. kanghc@chosun.ac.kr
authors.forename: Hyon Chol
authors.initials: HC
authors.lastname: Kang
authors.forename: Hanfei
authors.initials: H
authors.lastname: Yan
authors.forename: Yong S
authors.initials: YS
authors.lastname: Chu
authors.forename: Su Yong
authors.initials: SY
authors.lastname: Lee
authors.forename: Jungdae
authors.initials: J
authors.lastname: Kim
authors.forename: Evgeny
authors.initials: E
authors.lastname: Nazaretski
authors.forename: Chan
authors.initials: C
authors.lastname: Kim
authors.forename: Okkyun
authors.initials: O
authors.lastname: Seo
authors.forename: Do Young
authors.initials: do Y
authors.lastname: Noh
authors.forename: Albert T
authors.initials: AT
authors.lastname: Macrander
authors.forename: G Brian
authors.initials: GB
authors.lastname: Stephenson
authors.forename: Jörg
authors.initials: J
authors.lastname: Maser