title: Fluorescence-Magnetism Functional EuS Nanocrystals with Controllable Morphologies for Dual Bioimaging.
abstract: Multiple functions incorporated in one single component material offer important applications in biosystems. Here we prepared a divalent state of rare earth EuS nanocrystals (NCs), which provides luminescent and magnetic properties, using both 1-Dodecanethiol (DT) and oleylamine (OLA) as reducing agents. The resultant EuS NCs exhibit controllable shapes, uniform size, and bright luminescence with a quantum yield as high as 3.5%. OLA as a surface ligand plays an important role in tunable morphologies, such as nanowires, nanorods, nanospheres et al. Another attractive nature of the EuS NCs is their paramagnetism at room temperature. In order to expand the biological applications, the resultant EuS NCs were modified with amphiphilic block copolymer F127 and transferred from oil to water phase. The excellent biocompatibility of EuS NCs is demonstrated as well as preservation of their luminescence and paramagnetic properties. The EuS NCs offer multifunction and great advantages of bright luminescence, paramagnetic, controllable morphologies, and good biocompatibility promising applications in the field of simultaneous magnetic resonance and fluorescence bioimaging.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yuanqing
authors.initials: Y
authors.lastname: Sun
authors.affiliation: School of Stomatology, Jilin University , Changchun 130041, P.R. China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Tianxin
authors.initials: T
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Yueqi
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: China-Australia Joint Research Centre for Functional Molecular Materials, School of Chemical & Material Engineering, Jiangnan University , Wuxi 214122, P. R. China.
authors.forename: Chuanxi
authors.initials: C
authors.lastname: Wang
authors.affiliation: School of Stomatology, Jilin University , Changchun 130041, P.R. China.
authors.forename: Hongchen
authors.initials: H
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Bai
authors.initials: B
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, P. R. China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Lin
mesh_terms: D005063:Europium; D005453:Fluorescence; D049449:Luminescence; D008280:Magnetics; D008674:Metals, Rare Earth; D053758:Nanoparticles; D013440:Sulfides
chemical_list: D008674:Metals, Rare Earth; D013440:Sulfides; D005063:Europium
keywords: EuS nanocrystals; controllable morphologies; dual bioimaging; fluorescence; magnetism