Supersensitive nanothermometer based on CdSe/CdSxSe1-x magic-sized quantum dots with in vivo low toxicity

被引：8

作者：

Silva, Jefferson F. ^{[1
]}

de Oliveira, Jerusa Maria ^{[2
,6
]}

Silva, Wagner F. ^{[1
]}

Soares, Ana C. Costa ^{[1
]}

Rocha, Ueslen ^{[1
]}

Dantas, Noelio Oliveira ^{[3
]}

da Silva Filho, Euripedes Alves ^{[4
]}

Duzzioni, Marcelo ^{[5
]}

Rulf Cofre, Axel Helmut ^{[5
]}

de Castro, Olagide Wagner ^{[7
]}

Anhezini, Lucas ^{[2
]}

Almeida Silva, Anielle Christine ^{[3
]}

Jacinto, Carlos ^{[1
]}

机构：

[1] Univ Fed Alagoas, Inst Fis, Grp Nanophoton & Imaging, Maceio, Alagoas, Brazil

[2] Univ Fed Alagoas, Lab In Vivo Anal Tox, Maceio, Alagoas, Brazil

[3] Univ Fed Alagoas, Inst Fis, Lab New Nanostruct & Funct Mat, Maceio, Alagoas, Brazil

[4] Univ Fed Alagoas, Inst Biol Sci & Hlth, Lab Climatized Environm, Maceio, Alagoas, Brazil

[5] Univ Fed Alagoas, Inst Biol Sci & Hlth, Lab Pharmacol Innovat, Maceio, Alagoas, Brazil

[6] Univ Fed Alagoas, Inst Chem & Biotechnol, Lab Electrochem & Oxidat Stress, Maceio, Alagoas, Brazil

[7] Univ Fed Alagoas, Inst Biol Sci & Hlth, Lab Neuropharmacol & Integrat Physiol Lab, Maceio, Alagoas, Brazil

来源：

CHEMICAL ENGINEERING SCIENCE | 2022年 / 264卷

关键词：

CdSe; CdSxSe1-x; Magic-sized Quantum Dots; Nanothermometry; Biocompatibility; Drosophila melanogaster; DROSOPHILA-MELANOGASTER; LUMINESCENCE; NANOPARTICLES; NANOCRYSTALS; SENSITIVITY; STABILITY; MODELS; FILMS;

D O I：

10.1016/j.ces.2022.118153

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We report on the temperature dependence of the photoluminescence spectrum of CdSe/CdSxSe1-x magic -sized quantum dots (MSQDs), as well as the CdSe/CdSxSe1-x MSQDs biocompatibility in Drosophila mel-anogaster. We found that the emission intensity of CdSe/CdSxSe1-x MSQDs decreases while the full width at half-maximum (FWHM) increases with the temperature in the range of 306-343 K, under excitation at 376 nm. Combining these two characteristics, an optical nanothermometer was developed with a max-imum relative thermal sensitivity (Sr) of 6.9 %K-1 at 306 K, based on the ratio between the FWHM and the maximum emission intensity, which is one of the highest values of Sr reported in the literature related to ratiometric optical thermometry systems. Additionally, our results suggest that lower concentrations of CdSe/CdSxSe1-x MSQDs are biocompatible in model of Drosophila melanogaster. Taken together, our data suggested a translational potential for fluorescence and thermal images in nanomedicine with low toxicity.(c) 2022 Elsevier Ltd. All rights reserved.

引用

页数：8

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