Facile One-Pot Conversion of Petroleum Asphaltene to High Quality Green Fluorescent Graphene Quantum Dots and Their Application in Cell Imaging

2016 ◽  
Vol 33 (9) ◽  
pp. 635-644 ◽  
Author(s):  
Pinhui Zhao ◽  
Menglong Yang ◽  
Weiyu Fan ◽  
Xiaojuan Wang ◽  
Fanlong Tang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
High Quality ◽  
One Pot ◽  
Green Fluorescent

Ball-Milling Graphite Used for Synthesis of Biocompatible Blue Luminescent Graphene Quantum Dots

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Zhou J ◽  
◽  
Dong Y ◽  
Ma Y ◽  
Zhang T ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ball Milling ◽  
Graphene Quantum Dots ◽  
Raw Material ◽  
Hydroxyl Groups ◽  
High Quality ◽  
Widespread Application ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron

Graphene Quantum Dots (GQDs) have been prepared by oxidationhydrothermal reaction, using ball-milling graphite as the starting materials. The prepared GQDs are endowed with excellent luminescence properties, with the optimum emission of 320nm. Blue photoluminescent emitted from the GQDs under ultraviolet light. The GQDs are ~3nm in width and 0.5~2 nm in thickness, revealed by high-resolution transmission electron microscopy and atomic force microscopy. In addition, Fourier transform infrared spectrum evidences the existence of carbonyl and hydroxyl groups, meaning GQDs can be dispersed in water easily and used in cellar imaging, and blue area inside L929 cells were clearly observed under the fluorescence microscope. Both low price of raw material and simple prepared method contribute to the high quality GQDs widespread application in future.

scholarly journals Chlorine Modulation Fluorescent Performance of Seaweed-Derived Graphene Quantum Dots for Long-Wavelength Excitation Cell-Imaging Application

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4994
Author(s):  
Weitao Li ◽  
Ningjia Jiang ◽  
Bin Wu ◽  
Yuan Liu ◽  
Luoman Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
Toxic Metal ◽  
Disease Diagnosis ◽  
Excitation Wavelength ◽  
Chlorine Atoms ◽  
Long Wavelength ◽  
Imaging Application ◽  
Preliminary Application

Biological imaging is an essential means of disease diagnosis. However, semiconductor quantum dots that are used in bioimaging applications comprise toxic metal elements that are nonbiodegradable, causing serious environmental problems. Herein, we developed a novel ecofriendly solvothermal method that uses ethanol as a solvent and doping with chlorine atoms to prepare highly fluorescent graphene quantum dots (GQDs) from seaweed. The GQDs doped with chlorine atoms exhibit high-intensity white fluorescence. Thus, their preliminary application in bioimaging has been confirmed. In addition, clear cell imaging could be performed at an excitation wavelength of 633 nm.

Recent Advances in the Cancer Bioimaging with Graphene Quantum Dots

2018 ◽  
Vol 25 (25) ◽  
pp. 2876-2893 ◽  
Author(s):  
Keheng Li ◽  
Xinna Zhao ◽  
Gang Wei ◽  
Zhiqiang Su
Keyword(s):  
Quantum Dots ◽  
Biomedical Applications ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
Biological Properties ◽  
Live Cells ◽  
Physical Chemical ◽  
Specific Cancer ◽  
Good Biocompatibility ◽  
Low Cytotoxicity

Fluorescent graphene quantum dots (GQDs) have attracted increasing interest in cancer bioimaging due to their stable photoluminescence (PL), high stability, low cytotoxicity, and good biocompatibility. In this review, we present the synthesis and chemical modification of GQDs firstly, and then introduce their unique physical, chemical, and biological properties like the absorption, PL, and cytotoxicity of GQDs. Finally and most importantly, the recent applications of GQDs in cancer bioimaging are demonstrated in detail, in which we focus on the biofunctionalization of GQDs for specific cancer cell imaging and real-time molecular imaging in live cells. We expect this work would provide valuable guides on the synthesis and modification of GQDs with adjustable properties for various biomedical applications in the future.

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