Dependence of Photoluminescence of Carbon Dots with Different Surface Functionalization on Hydrogen Factor of Water

被引：1

作者：

Khmeleva M.Y. ^{[1
,2
]}

Laptinskiy K.A. ^{[1
]}

Kasyanova P.S. ^{[2
]}

Tomskaya A.E. ^{[3
]}

Dolenko T.A. ^{[2
]}

机构：

[1] Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow

[2] Department of Physics, Moscow State University, Moscow

[3] Prokhorov Institute of General Physics, Russian Academy of Sciences, Moscow

来源：

Optics and Spectroscopy | 2023年 / 131卷 / 07期

关键词：

absorption spectroscopy; carbon dots; deprotonation; hydrogen index; photoluminescence; surface functionalization;

D O I：

10.1134/S0030400X23050077

中图分类号：

学科分类号：

摘要：

Abstract: The pH dependences of the photoluminescence of carbon dots synthesized by the hydrothermal method with polyfunctional and monofunctional (carboxylated and hydroxylated) surfaces have been studied. As a result of the analysis of the obtained photoluminescence and absorption spectra of aqueous suspensions of all studied types of carbon dots at different pH values, a significant effect of the acidity of the environment of nanoparticles on their optical properties was found. It has been found that the greatest changes in the spectral characteristics of absorption and photoluminescence of carbon dots with COOH, OH, and NH2 surface groups appear in the pH ranges of 2–5 and 8–12. The obtained results are explained are explained by the processes of protonation/deprotonation of the surface groups of carbon dots. © Pleiades Publishing, Ltd. 2023. ISSN 0030-400X, Optics and Spectroscopy, 2023, Vol. 131, No. 7, pp. 527–534. Pleiades Publishing, Ltd., 2023. Russian Text The Author(s), 2022, published in Optika i Spektroskopiya, 2022, Vol. 130, No. 6, pp. 882–889. English Text Ioffe Institute, 2023.

引用

页码：527 / 534

页数：7

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