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Oxidized Carbon Nitrides: Water‐Dispersible, Atomically Thin Carbon Nitride‐Based Nanodots and Their Performances as Bioimaging Probes
Author(s) -
Oh Junghoon,
Yoo Ran Ji,
Kim Seung Yeon,
Lee Yong Jin,
Kim Dong Wook,
Park Sungjin
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201406151
Subject(s) - nanodot , materials science , photoluminescence , carbon nitride , carbon fibers , thermogravimetric analysis , nitride , nanotechnology , fourier transform infrared spectroscopy , x ray photoelectron spectroscopy , graphitic carbon nitride , chemical engineering , optoelectronics , layer (electronics) , chemistry , catalysis , composite material , photocatalysis , composite number , engineering , biochemistry
Three‐dimensional (3D) carbon nitride (C 3 N 4 )‐based materials show excellent performance in a wide range of applications because of their suitable band structures. To realize the great promise of two‐dimensional (2D) allotropes of various 3D materials, it is highly important to develop routes for the production of 2D C 3 N 4 materials, which are one‐atom thick, in order to understand their intrinsic properties and identify their possible applications. In this work, water‐dispersible, atomically thin, and small carbon nitride nanodots were produced using the chemical oxidation of graphitic C 3 N 4 . Various analyses, including X‐ray diffraction, X‐ray photoelectron, Fourier‐transform infrared spectroscopy, and combustion‐based elemental analysis, and thermogravimetric analysis, confirmed the production of 3D oxidized C 3 N 4 materials. The 2D C 3 N 4 nanodots were successfully exfoliated as individual single layers; their lateral dimension was several tens of nanometers. They showed strong photoluminescence in the visible region as well as excellent performances as cell‐imaging probes in an in vitro study using confocal fluorescence microscopy.