Oxidized Carbon Nitrides: Water-Dispersible, Atomically Thin Carbon Nitride-Based Nanodots and Their Performances as Bioimaging Probes
Oxidized Carbon Nitrides: Water-Dispersible, Atomically Thin Carbon Nitride-Based Nanodots and Their Performances as Bioimaging Probes
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DOI：
10.1002/chem.201406151
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发表时间：
2015-04-13
影响因子：
4.3
通讯作者：
Park, Sungjin
中科院分区：
文献类型：
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作者：
Oh, Junghoon;Yoo, Ran Ji;Park, Sungjin
三维（3D）氮化碳（C3 N4）基材料由于其合适的能带结构而在广泛的应用中显示出优异的性能。为了实现各种3D材料的二维（2D）同素异形体的巨大前景，开发用于生产单原子厚度的2D C3 N4材料的路线是非常重要的，以便了解它们的内在特性并确定它们可能的应用。在这项工作中，水分散性，原子级薄，和小的氮化碳纳米点，使用石墨C3 N4的化学氧化。各种分析，包括X射线衍射、X射线光电子、傅里叶变换红外光谱和基于燃烧的元素分析以及热重分析，证实了3D氧化C3 N4材料的产生。2D C3 N4纳米点被成功地剥离为单独的单层;它们的横向尺寸为几十纳米。它们在可见光区表现出很强的光致发光，并在使用共聚焦荧光显微镜的体外研究中作为细胞成像探针表现出优异的性能。
Three-dimensional (3D) carbon nitride (C3N4)-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 C3N4 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 C3N4. 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 C3N4 materials. The 2D C3N4 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.