Controlled synthesis, bioimaging and toxicity assessments in strong red emitting Mn2+ doped NaYF4:Yb3+/Ho3+ nanophosphors

被引：32

作者：

Reddy, K. L. ^{[1
,2
]}

Rai, M. ^{[3
]}

Prabhakar, N. ^{[4
]}

Arppe, R. ^{[5
,7
]}

Rai, S. B. ^{[3
]}

Singh, S. K. ^{[6
]}

Rosenholm, J. M. ^{[4
]}

Krishnan, V. ^{[1
,2
]}

机构：

[1] Indian Inst Technol, Sch Basic Sci, Mandi 175005, Himachal Prades, India

[2] Indian Inst Technol, Adv Mat Res Ctr, Mandi 175005, Himachal Prades, India

[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[4] Abo Akad Univ, Fac Sci & Engn, Pharmaceut Sci Lab, FIN-20520 Turku, Finland

[5] Univ Turku, Dept Biotechnol, Turku 20014, Finland

[6] Banaras Hindu Univ, Indian Inst Technol, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[7] Univ Copenhagen, Dept Chem, DK-2100 Copenhagen, Denmark

来源：

RSC ADVANCES | 2016年 / 6卷 / 59期

基金：

芬兰科学院;

关键词：

UP-CONVERSION LUMINESCENCE; DOPANT-CONTROLLED SYNTHESIS; QUANTUM DOTS; MULTIFUNCTIONAL NANOPROBES; NANOCRYSTALS; EMISSION; NANOPARTICLES; ER3+; PHASE; SIZE;

D O I：

10.1039/c6ra07106f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rare earth, Yb3+/Ho3+ doped NaYF4 nanophosphors showed augmentation of visible green and red light emission by the introduction of Mn2+ as a co-dopant. Nanophosphors were characterized for their morphology and upconversion (UC) fluorescence, as a function of co-dopant concentration. The effect of Mn2+ doping has been investigated to explore the UC mechanism of the phosphors. With the introduction of Mn2+, the intensity of all the emission bands was increased, in particular the red band, which was most significant at 40 mol% doping. A possible mechanism for the enhancement of the red emission has been proposed. The prepared UC nanoparticles were functionalized with polyethylene glycol-polyethylene imine co-polymer to make them water dispersible and successfully applied for cancer cell imaging.

引用

页码：53698 / 53704

页数：7

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