浏览全部资源
扫码关注微信
1. 盐城工学院 材料工程学院,江苏 盐城,224051
2. 长春工业大学 材料科学高等研究院,吉林 长春,130012
纸质出版日期:2017-9-5,
网络出版日期:2017-6-22,
收稿日期:2017-2-24,
修回日期:2017-4-22,
扫 描 看 全 文
翟雪松, 刘世虎, 范柳燕等. 强上转换发光的LiLu<sub>1-<em>x</em></sub>Yb<sub><em>x</em></sub> F<sub>4</sub>:Tm@LiGdF<sub>4</sub>核壳纳米晶的制备[J]. 发光学报, 2017,38(9): 1149-1154
ZHAI Xue-song, LIU Shi-hu, FAN Liu-yan etc. Preparation of LiLu<sub>1-<em>x</em></sub>Yb<sub><em>x</em></sub>F<sub>4</sub>:Tm@LiGdF<sub>4</sub> Core-shell Nanocrystals with Enhanced Upconversion Luminescence[J]. Chinese Journal of Luminescence, 2017,38(9): 1149-1154
翟雪松, 刘世虎, 范柳燕等. 强上转换发光的LiLu<sub>1-<em>x</em></sub>Yb<sub><em>x</em></sub> F<sub>4</sub>:Tm@LiGdF<sub>4</sub>核壳纳米晶的制备[J]. 发光学报, 2017,38(9): 1149-1154 DOI: 10.3788/fgxb20173809.1149.
ZHAI Xue-song, LIU Shi-hu, FAN Liu-yan etc. Preparation of LiLu<sub>1-<em>x</em></sub>Yb<sub><em>x</em></sub>F<sub>4</sub>:Tm@LiGdF<sub>4</sub> Core-shell Nanocrystals with Enhanced Upconversion Luminescence[J]. Chinese Journal of Luminescence, 2017,38(9): 1149-1154 DOI: 10.3788/fgxb20173809.1149.
利用高温热分解法制备了LiLuF
4
:Yb,Tm@LiGdF
4
核壳纳米晶。在980 nm激光激发下,与未包覆的样品相比,LiLuF
4
:Yb,Tm@LiGdF
4
核壳纳米晶的发光增强了15倍左右,这主要是因为通过惰性壳层的包覆可以有效抑制表面猝灭效应。另外,随着核中Yb
3+
离子的摩尔分数从20%增加到100%,上转换发光强度逐渐增大,最大增加了12.4倍左右。这主要是由于增加Yb
3+
离子的浓度可以增加纳米粒子对激发光的吸收和提高Yb
3+
到Tm
3+
的能量传递速率。所制备的LiYbF
4
:2%Tm@LiGdF
4
核壳纳米晶的发光效率高达4%。
LiLuF
4
:Yb
Tm@LiGdF
4
core-shell nanoparticles were synthesized by high temperature thermal decomposition method. Under the excitation of980 nm near infrared (NIR) laser
the luminescence intensity of the core-shell nanoparticles can be enhanced by about 15 times in contrast to the pure LiLuF
4
core. It is due to the passivating role of the inert-shell for protecting Tm
3+
ions in the core from nonradiative decay caused by surface defects. The intensity of the UC emission of the nanocrystals increases (at most 12.4 times) as the mole fraction of Yb
3+
ions increases from 20% to 100%
owing to the improvement of near-infrared absorption and energy-transfer from Yb
3+
to Tm
3+
. LiYbF
4
:2%Tm@LiGdF
4
core-shell nanoparticles show a high absolute UC quantum yield of 4.0%.
上转换发光核壳纳米晶LiLuF4掺杂浓度
upconversion luminescencecore-shell nanoparticlesLiLuF4doping concentration
WANG F, BANERJEE D, LIU Y S, et al.. Upconversion nanoparticles in biological labeling, imaging, and therapy[J]. Analyst, 2010, 135(8):1839-1854.
LIU J N, BU W B, PAN L M, et al.. Simultaneous nuclear imaging and intranuclear drug delivery by nuclear-targeted multifunctional upconversion nanoprobes[J]. Biomaterials, 2012, 33(29):7282-7290.
HEER S, KMPE K, GVDEL H U, et al.. Highly efficient multicolour upconversion emission in transparent colloids of lanthanide-doped NaYF4 nanocrystals[J]. Adv. Mater., 2004, 16(23-24):2102-2105.
PANG M, ZHAI X S, FENG J, et al.. One-step synthesis of water-soluble hexagonal NaScF4:Yb/Er nanocrystals with intense red emission[J]. Dalton Trans., 2014, 43(26):10202-10207.
WEISSLEDER R. A clearer vision for in vivo imaging[J]. Nat. Biotechnol., 2001, 19(4):316-317.
MAHALINGAM V, VETRONE F, NACCACHE R, et al.. Colloidal Tm3+/Yb3+-doped LiYF4 nanocrystals:multiple luminescence spanning the UV to NIR regions via low-energy excitation[J]. Adv. Mater., 2009, 21(40):4025-4029.
HUANG P, ZHENG W, ZHOU S Y, et al.. Lanthanide-doped LiLuF4 upconversion nanoprobes for the detection of disease biomarkers[J]. Angew. Chem. Int. Ed., 2014, 53(5):1252-1257.
WANG M, CHEN Z, ZHENG W, et al.. Lanthanide-doped upconversion nanoparticles electrostatically coupled with photosensitizers for near-infrared-triggered photodynamic therapy[J]. Nanoscale, 2014, 6(14):8274-8282.
CHEN Q, SUI J H, CAI W. Enhanced upconversion emission in Yb3+ and Er3+ codoped NaGdF4 nanocrystals by introducing Li+ ions[J]. Nanoscale, 2012, 4(3):779-784.
LIU N, QIN W P, QIN G S, et al.. Highly plasmon-enhanced upconversion emissions from Au@-NaYF4:Yb, Tm hybrid nanostructures[J]. Chem. Commun., 2011, 47(27):7671-7673.
VETRONE F, NACCACHE R, MAHALINGAM V, et al.. The active-core/active-shell approach:a strategy to enhance the upconversion luminescence in lanthanide-doped nanoparticles[J]. Adv. Funct. Mater., 2009, 19(18):2924-2929.
ZHAI X S, LIU S S, ZHANG Y L, et al.. Controlled synthesis of ultrasmall hexagonal NaTm0.02Lu0.98-x YbxF4 nanocrystals with enhanced upconversion luminescence[J]. J. Mater. Chem. C, 2014, 2(11):2037-2044.
QIU H L, CHEN G Y, FAN R W, et al.. Intense ultraviolet upconversion emission from water-dispersed colloidal YF3:Yb3+/Tm3+ rhombic nanodisks[J]. Nanoscale, 2014, 6(2):753-757.
SUN Y, ZHU X J, PENG J J, et al.. Core-shell lanthanide upconversion nanophosphors as four-modal probes for tumor angiogenesis imaging[J]. ACS Nano, 2014, 7(12):11290-11300.
ZHAI X S, LIU S S, LIU X Y, et al.. Sub-10 nm BaYF5:Yb3+, Er3+ core-shell nanoparticles with intense 1.53m fluorescence for polymer-based waveguide amplifiers[J]. J. Mater. Chem. C, 2013, 1(7):1525-1530.
张鹏, 李大光, 刘世虎, 等. Gd3+, Tm3+和Yb3+掺杂的Y2O3微晶中Gd3+离子的紫外上转换发光及其增强的研究[J]. 发光学报, 2015, 36(8):893-897. ZHANG P, LI D G, LIU S H, et al.. UV upconversion luminescence of Gd3+ in Yb/Tm/Gd doped Y2O3 microcrystals[J]. Chin. J. Lumin., 2015, 36(8):893-897. (in Chinese)
LIU H C, XU C T, LINDGRE D, et al.. Balancing power density based quantum yield characterization of upconverting nanoparticles for arbitrary excitation intensities[J]. Nanoscale, 2013, 5(11):4770-4775.
LOUIE A. Multimodality imaging probes:design and challenges[J]. Chem. Rev., 2010, 110(5):3146-3195.
0
浏览量
32
下载量
3
CSCD
关联资源
相关文章
相关作者
相关机构