title: Controllable Synthesis of Mn6+Doped Nanoparticles by a Facile Anion Exchange Method.
abstract: Fluorescence imaging in the second near-infrared window (NIR-II, 1000-1400 nm) is attracting extensive attention. Mn6+doped BaSO4with broadband emission from 900 nm to 1400 nm is emerging as a new class of NIR phosphor for fluorescence imaging. Manganese has diverse valence states, thus it is difficult to prevent valence change of Mn6+during traditional synthesis process. In this work, BaSO4:Mn6+nanoparticles with uniform size and morphology were first successfully prepared through a fast liquid-solid solution route at room temperature. The nanoparticles exhibit broadband NIR emission from Mn6+when excited by 808 nm lasers. This convenient strategy, based on an efficient anion exchange reaction, is proved effective for synthesizing nano-sized materials. The results reveal that our strategy has great potential in fabricating special valence state ion doped nanomaterials.
authors.affiliation: State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China.
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Chenxing
authors.initials: C
authors.lastname: Liao
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.forename: Jianrong
authors.initials: J
authors.lastname: Qiu