Effects of Surface Passivation on Photoluminescence Properties and Biomedical Imaging of Graphene Quantum Dots

2018 ◽  
Vol 86 (15) ◽  
pp. 7-12 ◽  
Author(s):  
Wenxian Zhang ◽  
Jian Dong ◽  
Kaiqi Wang ◽  
Yanli Zhao ◽  
Lifeng Dong
Keyword(s):  
Quantum Dots ◽  
Biomedical Imaging ◽  
Surface Passivation ◽  
Graphene Quantum Dots ◽  
Photoluminescence Properties

New paradigms for the synthesis of graphene quantum dots from sustainable bioresources

2017 ◽  
Vol 41 (17) ◽  
pp. 8706-8710 ◽  
Author(s):  
Sankarapillai Mahesh ◽  
C. Lalitha Lekshmi ◽  
Kizhisseri Devi Renuka
Keyword(s):  
Quantum Dots ◽  
Scientific Community ◽  
Graphene Quantum Dots ◽  
Research Interest ◽  
Photoluminescence Properties

Emerging Graphene Quantum Dots (GQDs)—a new member of the carbon family—have attracted a tremendous research interest in the scientific community due to their small size and tunable photoluminescence properties.

Graphene oxide derived graphene quantum dots with different photoluminescence properties and peroxidase-like catalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50609-50617 ◽  
Author(s):  
Duosi Tang ◽  
Jingjing Liu ◽  
Xiaomei Yan ◽  
Longtian Kang
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Graphene Quantum Dots ◽  
Photoluminescence Properties

We demonstrate that there are basically two kinds of GO-derived GQDs with different photoluminescence properties and peroxidase-like catalytic activity.

Effects of low gamma irradiation dose on the photoluminescence properties of graphene quantum dots

2016 ◽  
Vol 48 (4) ◽  
Author(s):  
Svetlana Jovanović ◽  
Zoran Marković ◽  
Milica Budimir ◽  
Zdenko Spitalsky ◽  
Bojan Vidoeski ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Gamma Irradiation ◽  
Irradiation Dose ◽  
Graphene Quantum Dots ◽  
Photoluminescence Properties

Graphene Quantum dots for Biophotonic Applications

2015 ◽  
Vol 1786 ◽  
pp. 1-6 ◽  
Author(s):  
Aneshkumar Tilwani ◽  
Hildegarde Bell ◽  
Jose Alvarez ◽  
Belqais Naqshbandi ◽  
Folarin Erogbogbo
Keyword(s):  
Quantum Dots ◽  
Biomedical Imaging ◽  
Near Infrared ◽  
Fluorescent Dyes ◽  
Biomedical Application ◽  
Imaging Techniques ◽  
Photophysical Properties ◽  
Graphene Quantum Dots ◽  
Infrared Emission ◽  
Fluorescence Properties

ABSTRACTGraphene Quantum Dots (GQDs) are of interest to the biomedical community due to their unique fluorescence properties, which may be advantageous for biology and medicine. Advantages of this graphene nanomaterial over fluorescent dyes for biomedical imaging include bright emission, easy surface modification, biocompatibility, and anticipated low toxicity. We hypothesize that GQDs with desirable fluorescence properties which can be used for effective biomedical imaging (such as near infrared emission) may be synthesized from cheap carbon sources. Here, we show that these fluorescent GQDs are fabricated in a facile wet chemistry route using activated charcoal as the starting material. The GQDs were characterized with AFM, TEM, FTIR, PL spectroscopy, Raman spectroscopy and animal imaging techniques. The particles were visible in animals indicating their potential for biomedical imaging. The GQDs exhibited excitation that spanned the UV and visible ranges and emission that spanned the visible and near infrared ranges. The GQDs were an average of 4 nm in height, crystalline, from 1 to 60 nm in size. The GQDs were consistent with the presence of graphene and the following functional groups: C-O, C-H, C=C, and CO2H. In conclusion, GQDs with favorable photophysical properties can be produced from affordable and widely available raw materials for imaging and other biomedical application purposes.

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