NDLI: Lanthanide doped $Bi_{2}O_{3}$ upconversion luminescence nanospheres for temperature sensing and optical imaging

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhang, Hongjie Dong, Lile Liu, Xiuling Wang, Zhuo Feng, Jing Song, Shuyan Xu, Xia Su, Yue Lei, Pengpeng
Description	Author Affiliation: Lei P ( State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China. fengj@ciac.ac.cn hongjie@ciac.ac.cn.)
Abstract	Water-soluble lanthanide $(Ln^{3+})$ doped $Bi_{2}O_{3}$ nanospheres have been successfully prepared through a solid-state-chemistry thermal decomposition process. The nanospheres exhibit intense upconversion luminescence (UCL) by doping the $Ln^{3+}$ (Ln = Yb, Er/Ho/Tm) ions into the $Bi_{2}O_{3}$ host matrix under 980 nm excitation. The ratio of red/green emission of $Bi_{2}O_{3}:Yb^{3+}/Er^{3+}$ nanospheres exhibits a significant change as the calcination temperature increases and the value could reach 105.6. Moreover, the UCL of $Bi_{2}O_{3}:Yb^{3+}/Tm^{3+}$ nanospheres are temperature-sensitive, where the intensity ratios of 799 and 808 nm emissions increase monotonously with temperature. The MTT assay reveals that $Bi_{2}O_{3}:Yb^{3+}/Tm^{3+}$ nanospheres exhibit good biocompatibility by grafting citric acid molecules on the surface. The application possibility of $Bi_{2}O_{3}:Yb^{3+}/Tm^{3+}$ nanospheres as bioprobes for optical imaging in vivo is also confirmed by the high-contrast photoluminescence images between the background and the UCL imaging area.
ISSN	14779226
Issue Number	6
Journal	Dalton Trans.
Volume Number	45
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2016-02-14
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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