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教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:应用化学. 精细化工

办公地点:大连理工大学西部校区 精细化工重点实验室 E426

电子邮箱:niuwb@dlut.edu.cn

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Multicolor output and shape controlled synthesis of lanthanide-ion doped fluorides upconversion nanoparticles

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论文类型:期刊论文

第一作者:Niu, Wenbin

通讯作者:Zhang, SF (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China.

合写作者:Wu, Suli,Zhang, Shufen,Li, Jie,Li, Lian

发表时间:2011-04-01

发表刊物:DALTON TRANSACTIONS

收录刊物:SCIE、EI、PubMed

卷号:40

期号:13

页面范围:3305-3314

ISSN号:1477-9226

摘要:A general and facile approach for tailoring the multicolor output and shapes of lanthanide-ion doped fluoride upconversion nanoparticles (UCNPs) within a given composition is presented. By adjusting the temperature and time in the thermolysis procedure, the color output and shapes of NaYF(4):20%Yb, 2%Er UCNPs can be readily manipulated. The nanoparticles were characterized through the use of transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and upconversion luminescence spectroscopy. It is shown that the relative intensities of green emissions gradually increased with the rise of temperature and prolongation of growth time under excitation of 980 nm, which resulted in multicolor output of NaYF4:20%Yb, 2%Er UCNPs. Simultaneously, the shapes for UCNPs can also be controlled. TEM images, estimated micro-stress by Williamson-Hall methodology and a series of control experiments and analyses reveal that crystallinity is mainly responsible for the multicolor output of UCNPs. Based on the above method, the tailoring of color output is also successfully realized in Ho(3+) and Tm(3+) ions. It is expected that this method may be used to tune the physical properties of other nanoparticles, and these multicolored UCNPs are promising for applications in multiplexed bioimaging, biodetection, display, other optical technologies, etc.