Synthesis of graphene oxide dots for excitation-wavelength independent photoluminescence at high quantum yields

2015 ◽  
Vol 3 (17) ◽  
pp. 4553-4562 ◽  
Author(s):  
Chiao-Yi Teng ◽  
Te-Fu Yeh ◽  
Kuang-I Lin ◽  
Shean-Jen Chen ◽  
Masahiro Yoshimura ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Quantum Yield ◽  
White Light ◽  
Light Emission ◽  
Quantum Yields ◽  
Excitation Wavelength ◽  
Nitrogen Doped ◽  
Violet Light ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nitrogen-doped graphene oxide dots exhibit excitation-wavelength independent photoluminescence at 530 nm and 50% quantum yield. The dots show excellent white light emission by combining green emissions with violet light used for excitation.

Photodynamic antimicrobial activity of benzimidazole substituted phthalocyanine when conjugated to Nitrogen Doped Graphene Quantum Dots against Staphylococcus aureus

2021 ◽  
Vol 20 (2) ◽  
pp. 175-191
Author(s):  
Pinar Sen ◽  
Nnamdi Nwahara ◽  
Tebello Nyokong
Keyword(s):  
Staphylococcus Aureus ◽  
Quantum Yield ◽  
Singlet Oxygen ◽  
Graphene Quantum Dots ◽  
Life Time ◽  
Zinc Phthalocyanine ◽  
Quantum Yields ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

In this study, peripherally benzimidazole unit substituted ZnPc (1) and its conjugation to nitrogen doped graphene quantum dot (NGQD) as potential phthalocyanine support via π-π stacking have been presented and fully characterized. The bottom-up solution-based synthesized NGQDs was conjugated non-covalently to zinc phthalocyanine to form NGQDs-Pc nanoconjugates. The photophysical and photochemical properties of both such as absorption, fluorescence, fluorescence life time, singlet oxygen quantum yields, triplet state quantum yields and exited state lifetimes were investigated in solutions. We observed a decrease in the fluorescence quantum yields with a corresponding increase in the triplet quantum yield and singlet oxygen quantum yield of the nanoconjugates in comparison to the phthalocyanine complex alone. Photodynamic antimicrobial chemotherapy activities (PACT) of ZnPc alone and its nanoconjugate were determined towards Staphylococcus aureus.

Bimetallic Mixed Metal Oxide (CuO/NiO) In Fusion with Nitrogen-doped Graphene Oxide: An Alternate Approach for Developing Potential Biocarrier

2021 ◽  
pp. 105781
Author(s):  
Periasamy Anbu ◽  
Subash C.B. Gopinath ◽  
Kandasamy Saravanakumar ◽  
Sekar Vijayakumar ◽  
Santheraleka Ramanathan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Mixed Metal Oxide ◽  
Mixed Metal ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Biocompatible hole scavenger–assisted graphene oxide dots for photodynamic cancer therapy

Nanoscale ◽  
2021 ◽  
Author(s):  
Chun-Yan Shih ◽  
Wei-Lun Huang ◽  
I-Ting Chiang ◽  
Wu-Chou Su ◽  
Hsisheng Teng
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Cancer Therapy ◽  
Cancer Cells ◽  
Nitrogen Doped ◽  
Photodynamic Cancer Therapy ◽  
Hole Scavenger ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Tuning of the nitrogen-doped graphene oxide dot and ascorbic acid concentrations can selectively kill cancer cells through either apoptosis or necrosis.

Understanding Na-Ion Adsorption in Nitrogen Doped Graphene Oxide Anode for Rechargeable Sodium Ion Batteries

2021 ◽  
pp. 152147
Author(s):  
Siraj Ud Daula Shamim ◽  
Md Kamal Hossain ◽  
Syed Mahedi Hasan ◽  
Afiya Akter Piya ◽  
Mohammad Sadiqur Rahman ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Sodium Ion ◽  
Ion Adsorption ◽  
Sodium Ion Batteries ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Oxide Anode

Outstanding supercapacitor performance of Nd–Mn co-doped perovskite LaFeO3@nitrogen-doped graphene oxide nanocomposites

2020 ◽  
Vol 335 ◽  
pp. 135699 ◽  
Author(s):  
Armin Rezanezhad ◽  
Ehsan Rezaie ◽  
Laleh Saleh Ghadimi ◽  
Abdollah Hajalilou ◽  
Ebrahim Abouzari-Lotf ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Supercapacitor Performance ◽  
Co Doped

Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: synthesis and photocatalytic performance under visible-light irradiation

2018 ◽  
Vol 42 (11) ◽  
pp. 8914-8923 ◽  
Author(s):  
Baihong An ◽  
Yanan Liu ◽  
Chengcheng Xu ◽  
Han Wang ◽  
Jun Wan
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Light Irradiation ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Magnetically Separable

Visible light responsive Fe3O4–WSe2/NG (nitrogen doped graphene oxide) heterojunction nanocomposites were synthesized by a hydrothermal synthesis route, in which Fe3O4 and WSe2 particles were coated on the surface of NG.

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