Facile preparation and the stepwise formation mechanistic investigation of gram-scale nitrogen-doped graphene quantum dots

2017 ◽  
Vol 5 (35) ◽  
pp. 9174-9180 ◽  
Author(s):  
Renbing Tian ◽  
Suting Zhong ◽  
Juan Wu ◽  
Yongliang Geng ◽  
Baojing Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Nitrilotriacetic Acid ◽  
One Pot ◽  
Nitrogen Doped ◽  
Mechanistic Investigation ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Facile Preparation ◽  
Stepwise Formation

Gram scale N-doped GQDs were prepared using a facile one-pot method by polymerization of nitrilotriacetic acid, showing a purity of over 99% without a dialysis process, a synthetic yield of 46% and a quantum yield of 45.8%.

scholarly journals Manganese(ii) enhanced fluorescent nitrogen-doped graphene quantum dots: a facile and efficient synthesis and their applications for bioimaging and detection of Hg2+ ions

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 5902-5911 ◽  
Author(s):  
Li Yang ◽  
Aimiao Qin ◽  
Shuoping Chen ◽  
Lei Liao ◽  
Jiangke Qin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Solubility ◽  
Raw Materials ◽  
Graphene Quantum Dots ◽  
Hydrothermal Carbonization ◽  
One Pot ◽  
Nitrogen Doped ◽  
Manganese Ion ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Manganese ion (Mn2+) bonded nitrogen-doped graphene quantum dots (Mn(ii)-NGQDs) with water solubility have been successfully synthesized by a simple, one-pot hydrothermal carbonization, using sodium citrate, glycine and manganese chloride as raw materials.

scholarly journals Highly Fluorescent Nitrogen-Doped Graphene Quantum Dots’ Synthesis and Their Applications as Fe(III) Ions Sensor

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Fei Lu ◽  
Yi-hua Zhou ◽  
Li-hui Wu ◽  
Jun Qian ◽  
Sheng Cao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Quantum Dots ◽  
Metal Ion ◽  
Graphene Quantum Dots ◽  
Fluorescence Emission ◽  
Blue Fluorescence ◽  
One Pot ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nitrogen-doped graphene quantum dots (N-GQDs) with strong blue fluorescence and a high quantum yield of 88.9% were synthesized via a facile one-pot hydrothermal treatment with citric acid (CA) and ethylenediamine (EDA) as carbon and nitrogen sources, respectively. The blue fluorescence emission is independent of the excitation wavelengths. These N-GQDs dispersed well in water and ethyl alcohol and showed a highly selective and sensitive detection of hazardous and toxic Fe3+in the range of 1600μmol/L to 6000μmol/L through a fluorescence quenching process with a detection limit of 2.37μmol/L. Based on the excellent sensitivity and selectivity of N-GQDs to heavy metal ions, paper-based sensors can be fabricated by inkjet printing, which are rapid but low cost. So the visual instant on-site identification of heavy metal ion will be realized in the future.

Sulfur and nitrogen-doped graphene quantum dots/PANI nanocomposites for supercapacitors

2021 ◽  
Author(s):  
Hemalatha Kuzhandaivel ◽  
Sornalatha Manickam ◽  
Suresh Kannan Balasingam ◽  
Manik Clinton Franklin ◽  
Hee-Je Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Charge Storage ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Supercapacitor Applications ◽  
Storage Properties

Sulfur and nitrogen-doped graphene quantum dots/polyaniline nanocomposites were synthesized and their electrochemical charge storage properties were tested for supercapacitor applications.

scholarly journals Nanocomposite of CuInS/ZnS and Nitrogen-Doped Graphene Quantum Dots for Cholesterol Sensing

ACS Omega ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 2167-2176
Author(s):  
Rania Adel ◽  
Shaker Ebrahim ◽  
Azza Shokry ◽  
Moataz Soliman ◽  
Marwa Khalil
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

scholarly journals Effects of Doxorubicin Delivery by Nitrogen-Doped Graphene Quantum Dots on Cancer Cell Growth: Experimental Study and Mathematical Modeling

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 140
Author(s):  
Madison Frieler ◽  
Christine Pho ◽  
Bong Han Lee ◽  
Hana Dobrovolny ◽  
Giridhar R. Akkaraju ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cell Growth ◽  
Cancer Cell ◽  
Graphene Quantum Dots ◽  
Maximum Effect ◽  
Cancer Cell Growth ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

With 18 million new cases diagnosed each year worldwide, cancer strongly impacts both science and society. Current models of cancer cell growth and therapeutic efficacy in vitro are time-dependent and often do not consider the Emax value (the maximum reduction in the growth rate), leading to inconsistencies in the obtained IC50 (concentration of the drug at half maximum effect). In this work, we introduce a new dual experimental/modeling approach to model HeLa and MCF-7 cancer cell growth and assess the efficacy of doxorubicin chemotherapeutics, whether alone or delivered by novel nitrogen-doped graphene quantum dots (N-GQDs). These biocompatible/biodegradable nanoparticles were used for the first time in this work for the delivery and fluorescence tracking of doxorubicin, ultimately decreasing its IC50 by over 1.5 and allowing for the use of up to 10 times lower doses of the drug to achieve the same therapeutic effect. Based on the experimental in vitro studies with nanomaterial-delivered chemotherapy, we also developed a method of cancer cell growth modeling that (1) includes an Emax value, which is often not characterized, and (2), most importantly, is measurement time-independent. This will allow for the more consistent assessment of the efficiency of anti-cancer drugs and nanomaterial-delivered formulations, as well as efficacy improvements of nanomaterial delivery.

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