Open AccessPreparation of carbon dots with orange emission for Cr(Ш) detection and cellular imaging
Author(s) -
Si Junying,
Wang Hong,
Wu Baoshuang,
Wang Guangshuo,
Yang Jiajia,
Huo Zhongchao,
Tian Tian,
Zhao Xuelin,
Han Shuai
Publication year - 2021
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mna2.12009
Subject(s) - fluorescence , materials science , quantum yield , x ray photoelectron spectroscopy , detection limit , analytical chemistry (journal) , spectroscopy , carbon fibers , infrared spectroscopy , particle size , fluorescence spectroscopy , metal ions in aqueous solution , metal , nuclear chemistry , chemistry , nuclear magnetic resonance , composite number , metallurgy , organic chemistry , chromatography , optics , composite material , physics , quantum mechanics
A new type of orange emission carbon dots (OCDs) was prepared by hydrothermal method using 1,2,4‐triaminobenzene and p‐aminobenzenesulphonic acid as precursors. TEM characterization showed that the new OCDs were uniform in size with an average particle size of 4–7 nm. Infrared spectroscopy and XPS analysis showed that the surface of the OCDs were rich in hydrophilic functional groups. Fluorescence spectroscopy results showed that the obtained OCDs exhibited excellent fluorescence with an absolute quantum yield as high as 14.9%. The OCDs were further applied to the detection of metal ions. It was found that the fluorescence of OCDs could be effectively quenched by Cr(Ш) with a detection limit of 0.38 μ m . Notably, the obtained OCDs have been successfully used for fluorescence detection of Cr 3+ ions in cell level.