ZnSe:Mn aqueous colloidal quantum dots for optical and biomedical applications

被引：12

作者：

Silva, Thiago G. ^{[1
]}

Moura, Igor M. R. ^{[2
]}

Cabral Filho, Paulo E. ^{[3
]}

Pereira, Maria I. A. ^{[3
]}

Azevedo Filho, Clayton A. ^{[4
]}

Pereira, Goreti ^{[1
]}

Pereira, Giovannia A. L. ^{[2
]}

Fontes, Adriana ^{[3
]}

Santos, Beate S. ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Pharmaceut Sci, Recife, PE, Brazil

[2] Univ Fed Pernambuco, Dept Fundamental Chem, Recife, PE, Brazil

[3] Univ Fed Pernambuco, Biophys & Radiobiol Dept, Recife, PE, Brazil

[4] Fac Associacao Caruaruense Ensino, Caruaru, PE, Brazil

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 13 NO 7-9 | 2016年 / 13卷 / 7-9期

关键词：

ZnSe:Mn; quantum dots; d-dots; biolabeling; MN-DOPED ZNSE; SEMICONDUCTOR NANOCRYSTALS; CANDIDA-ALBICANS; PHOTOLUMINESCENCE; NANOPARTICLES; LUMINESCENCE; EFFICIENT;

D O I：

10.1002/pssc.201510300

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, we present the optimization of the optical properties of Mn2+ doped ZnSe QDs (also referred to as d-dots) coated with thioglycolic acid in aqueous medium. The nanoparticles were characterized by ionic coupled plasma, electron paramagnetic resonance, transmission electron microscopy and X-ray diffractometry. By applying a controlled dose of UV irradiation, we obtained efficient orange emitting d-dots (T-4(1)-> (6)A(1) transition centered at 580 nm). The results point out to a doping fraction in the nanoparticles smaller than 1% (0.89%), and that the Mn2+ ions are preferentially located close to the particle's surface. The UV photoactivation procedure has a definite influence on the emission intensity and on the colloidal stability of the particles. Photoactivated Mn2+ d-dots were conjugated to Concanavalin A and labeled specifically Candida albicans yeast cells, by targeting carbohydrate residues depicting the successful use of these QDs as fluorescent probes. (C) 2016 WILEY-VCH Verlag GmbH & Co.

引用

页码：530 / 533

页数：4

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