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题名: Improving 800 nm Triggered Upconversion Emission for Lanthanide-Doped CaF2 Nanoparticles through Sodium Ion Doping
作者: Xu, Bing1;  He, Huimei1;  Gu, Zhanjun2, 3;  Jin, Shengye4;  Ma, Ying1;  Zhai, Tianyou1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2017-08-24
DOI: 10.1021/acs.jpcc.7b05639
卷: 121, 期:33, 页:18280-18287
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Lanthanide ions (Ln(3+))-doped CaF2 luminescent nanoparticles exhibit unique optical properties and represent promising candidates for bioapplications; however, their inherent weak luminescence intensity greatly limits their application, especially for Nd3+-sensitized ones. We have doped Ln(3+) ions along with Na+ ion into CaF2 lattice to maintain charge neutrality and investigated the influence of Na+ ion on the 800 nm triggered upconversion process. As compared with Na+-free (shell layer) nanoparticles, the crystallinity of Na+-ion-codoped ones has been improved greatly, and the average lifetimes of the excited Nd3+, Yb3+, and Er3+ states have been prolonged after Na+ ion codoping in the sensitizing shell. Thus the energy-transfer efficiency from sensitizers (Nd3+) to activators (Er3+) has been increased by 67%. As a result, the upconversion luminescence intensity of the nanoparticles with suitable Na+ doping reaches 67 times higher than Na+-free nanoparticles upon 800 nm irradiation, although fewer Ln(3+) ions were doped into CaF2 in this case. The as-synthesized CaF2:Yb/Er@CaF2:Nd/Yb core-shell structured (CS) UCNPs may be good candidates as excellent imaging nanoprobes because of their good biocompatibility.
关键词[WOS]: IN-VIVO BIOAPPLICATIONS ;  NEAR-INFRARED LIGHT ;  PHOTODYNAMIC THERAPY ;  SHELL NANOPARTICLES ;  BIOIMAGING PROBES ;  ENERGY-TRANSFER ;  LUMINESCENT ;  ND3+ ;  NANOCRYSTALS ;  NANOMATERIALS
语种: 英语
WOS记录号: WOS:000408598600077
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150004
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & & Mould Technol, Wuhan 430074, Hubei, Peoples R China
2.Chinese Acad Sci, Natl Ctr Nanosci & Technol, Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Natl Ctr Nanosci & Technol, Inst High Energy Phys, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Xu, Bing,He, Huimei,Gu, Zhanjun,et al. Improving 800 nm Triggered Upconversion Emission for Lanthanide-Doped CaF2 Nanoparticles through Sodium Ion Doping[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(33):18280-18287.
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