Facile One-Pot Conversion of Petroleum Asphaltene to High Quality Green Fluorescent Graphene Quantum Dots and Their Application in Cell Imaging
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- 作者：Pinhui Zhao ; Menglong Yang ; Weiyu Fan ; Xiaojuan Wang ; Fanlong Tang ; Chunpeng Yang ; Xiaowei Dou ; Suying Li ; Yanan Wang and Yanwei Cao
- 刊名：Particle & Particle Systems Characterization
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：33
- 期：9
- 页码：635-644
- 全文大小：2562K
- ISSN：1521-4117
文摘
Benefiting from the natural nano-size graphene-structure in natural asphaltene material, a facile one-pot route, mild chemical oxidation of low-value petroleum asphaltene followed by routine ammonium neutralization, is presented to produce high quality graphene quantum dots (GQDs). The asphaltene-derived GQDs possess a variety of oxygen-containing and nitrogen-containing functional groups such as carboxyl, hydroxyl, amine, and nitro groups. They present such excellent fluorescence properties as stable ability to retain strong green fluorescence within a relative broad excitation range in a bio-suitable pH range of 4–7, high photoluminescence quantum yield of 18% and good fluorescent stability against photobleaching. And they are much smaller and thinner than most reported GQDs, displaying good biocompatibility with low cytotoxicity, effective cellular uptake, and excellent fluorescent probe performance for cancer cell imaging.