Nitrogen–Sulfur-Doped Graphene Quantum Dots with Metal Ion-Resistance for Bioimaging

2019 ◽  
Vol 2 (11) ◽  
pp. 6858-6865 ◽  
Author(s):  
Zackery S. Schroer ◽  
Yingfen Wu ◽  
Yuqian Xing ◽  
Xu Wu ◽  
Xiao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Ion ◽  
Graphene Quantum Dots ◽  
Doped Graphene

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.

Tannin-based thin-film composite membranes integrated with nitrogen-doped graphene quantum dots for butanol dehydration through pervaporation

2021 ◽  
Vol 623 ◽  
pp. 119077
Author(s):  
Rumwald Leo G. Lecaros ◽  
Reincess E. Valbuena ◽  
Lemmuel L. Tayo ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Composite Membranes ◽  
Film Composite ◽  
Nitrogen Doped ◽  
Thin Film Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

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.

Red-fluorescent graphene quantum dots from guava leaf as a turn-off probe for sensing aqueous Hg(ii)

2021 ◽  
Vol 45 (10) ◽  
pp. 4617-4625
Author(s):  
Rahul V. Khose ◽  
Goutam Chakraborty ◽  
Mahesh P. Bondarde ◽  
Pravin H. Wadekar ◽  
Alok K. Ray ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Ion ◽  
Leaf Extract ◽  
Graphene Quantum Dots ◽  
Toxic Metal ◽  
Guava Leaf

In this work, we have prepared red-fluorescent graphene quantum dots and utilized as a highly selective and sensitive fluorescence turn-off probe for detection of the toxic metal ion Hg2+ from guava leaf extract.

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.

Sign in / Sign up

Export Citation Format

Share Document