title: One-pot synthesis of multicolor MnSe:ZnSe nanocrystals for optical coding.
abstract: Though the investigation on controlling the fluorescence properties of nanocrystals (NCs) with single emission has been widely reported, few efforts were spent on adjusting the fluorescence properties of NCs with multiple emission peaks. In this work, we successfully synthesized multicolor MnSe:ZnSe NCs with multiple emission peaks and developed a simple and accurate method to realize photoluminescence (PL) spectra (or color) adjustment. The PL of MnSe:ZnSe NCs has two distinct emission peaks, the trap emission of ZnSe at 475nm and Mn(2+)-induced emission at 585nm. By adjusting the nucleation temperature, the emission color of the NCs can be encoded according to the ratio of the emission intensities at 475 and 585nm. With the nucleation temperature rising from 0 to 70°C, the PL ratio between trap emission and Mn(2+)-induced emission can be consecutively changed from (1, 3) to (1, 0.5). In addition, the trap state is deeply inside the NCs rather than on NCs surface so that the trap emission is stable during environment change. Thus, these MnSe:ZnSe NCs hold great promise as novel single-particle coding labels for biomedical imaging.
authors.affiliation: Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
authors.forename: Yanbin
authors.initials: Y
authors.lastname: Wang
authors.forename: Chunlei
authors.initials: C
authors.lastname: Wang
authors.forename: Shuhong
authors.initials: S
authors.lastname: Xu
authors.forename: Haibao
authors.initials: H
authors.lastname: Shao
authors.forename: Yuan
authors.initials: Y
authors.lastname: Jiang
authors.forename: Fan
authors.initials: F
authors.lastname: Bo
authors.forename: Zhuyuan
authors.initials: Z
authors.lastname: Wang
authors.forename: Yiping
authors.initials: Y
authors.lastname: Cui
mesh_terms: D003116:Color; D008027:Light; D049449:Luminescence; D008345:Manganese / Q000737:chemistry*; D057054:Molecular Imaging; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012643:Selenium / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D015032:Zinc / Q000737:chemistry*
chemical_list: D008345:Manganese; D012643:Selenium; D015032:Zinc
keywords: MnSe aggregates; Multiple emission peaks; Nucleation temperature; Single-particle coding labels