Covalent functionalization of graphene oxide with polyglycerol and their use as templates for anchoring magnetic nanoparticles

2010 ◽  
Vol 160 (17-18) ◽  
pp. 2028-2036 ◽  
Author(s):  
Tuan Anh Pham ◽  
Nanjundan Ashok Kumar ◽  
Yeon Tae Jeong
Keyword(s):  
Graphene Oxide ◽  
Magnetic Nanoparticles ◽  
Covalent Functionalization

Layer by layer assembled functionalized graphene oxide-based polymer brushes for superlubricity on steel-steel tribocontact

Soft Matter ◽  
2021 ◽  
Author(s):  
Suprakash Samanta ◽  
Rashmi Ranjan Sahoo
Keyword(s):  
Graphene Oxide ◽  
Nucleophilic Addition ◽  
Polymer Brushes ◽  
Addition Reaction ◽  
Layer By Layer ◽  
Functionalized Graphene ◽  
Covalent Functionalization ◽  
Functionalized Graphene Oxide ◽  
Nucleophilic Addition Reaction ◽  
Branched Polyethylenimine

Present study demonstrates a simple and multistep approach for the preparation of covalent functionalization of chemically prepared graphene oxide (GO) by branched polyethylenimine (PEI) through nucleophilic addition reaction to prepare...

Versatile Graphene Oxide Nanosheets via Covalent Functionalization and Their Applications

2021 ◽  
Author(s):  
Minju Park ◽  
Namhee Kim ◽  
Jiyoung Lee ◽  
Minsu Gu ◽  
Byeong-Su Kim
Keyword(s):  
Graphene Oxide ◽  
Two Dimensional ◽  
Graphene Oxide Nanosheets ◽  
Covalent Functionalization ◽  
Graphene Derivatives

Even though many graphene derivatives that are atomically thin two-dimensional structures, such as graphene oxide (GO), have triggered enormous interest in the scientific and industrial communities owing to their easy...

scholarly journals Magnetization of graphene oxide nanosheets using nickel magnetic nanoparticles as a novel support for the fabrication of copper as a practical, selective, and reusable nanocatalyst in C–C and C–O coupling reactions

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 25867-25879
Author(s):  
Parisa Moradi ◽  
Maryam Hajjami
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Coupling Reactions ◽  
Graphene Oxide Nanosheets ◽  
Magnetic Graphene Oxide ◽  
Diaryl Ethers ◽  
Magnetic Graphene

Catalytic activity of supported copper on magnetic graphene oxide was investigated as a selective and reusable nanocatalyst in the synthesis of diaryl ethers and biphenyls.

γ-Ray dosimeters based on magnetic nanoparticles in graphene oxide nanocomposites: novel resistive dosimeters

2021 ◽  
Vol 127 (6) ◽  
Author(s):  
Shahzad Feizi ◽  
Anita Alipour ◽  
Parviz Ashtari ◽  
Milad Samii Matin
Keyword(s):  
Graphene Oxide ◽  
Magnetic Nanoparticles ◽  
Γ Ray

A nanocomposite consisting of graphene oxide and Fe3O4 magnetic nanoparticles for the extraction of flavonoids from tea, wine and urine samples

2015 ◽  
Vol 182 (13-14) ◽  
pp. 2299-2306 ◽  
Author(s):  
Jianrong Wu ◽  
Deli Xiao ◽  
Hongyan Zhao ◽  
Hua He ◽  
Jun Peng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Magnetic Nanoparticles ◽  
Urine Samples ◽  
Fe3o4 Magnetic Nanoparticles

Fabrication of chitosan-coated mixed spinel ferrite integrated with graphene oxide (GO) for magnetic extraction of viral RNA for potential detection of SARS-CoV-2

2021 ◽  
Author(s):  
Vijay Singh ◽  
Khalid Mujasam Batoo ◽  
Mahavir Singh
Keyword(s):  
Graphene Oxide ◽  
Magnetic Nanoparticles ◽  
Transmission Rate ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Rna Extraction ◽  
Magnetic Studies ◽  
Mixed Spinel ◽  
Diagnostic Approaches ◽  
Magnetic Extraction

Abstract Genetic variants of the COVID-19 causative virus have been arising and circulating globally. In many countries especially in developing ones with a huge population, vaccination has become one of the major challenges. SARS-CoV-2 variants’ fast transmission rate has upsurge the COVID cases, leading to more stress on health systems. In the current COVID-19 scenario, there is the requirement of more adequate diagnostic approaches to check the COVID-19 spread. Out of many diagnostic approaches, a magnetic nanoparticle-based reverse transcription-polymerase chain reaction could be nontrivial. The use of magnetic nanoparticles to separate nucleic acid of SARS-CoV-2 from the patient samples and applied for detection is an easy and more effective way for COVID-19 patient detection. Herein, the magnetic nanoparticles are synthesized using the sol-gel autocombustion methods and then, successfully coated with biopolymer (chitosan) using ultra-sonication. Chitosan-coated nanoparticles are successfully integrated into the graphene oxide sheets to introduce carboxyl groups. Crystallite size calculation, morphological and magnetic studies of synthesized magnetic nanoparticles, and multifunctional magnetic nanoparticles are done using XRD, SEM, TEM, and VSM respectively. Besides the potentiality of the fabricated nanocomposites in RNA extraction protocol is also discussed with schematic representation.

Pseudocapacitance and excellent cyclability of 2,5-dimethoxy-1,4-benzoquinone on graphene

2016 ◽  
Vol 9 (8) ◽  
pp. 2586-2594 ◽  
Author(s):  
Muhammad Boota ◽  
Chi Chen ◽  
Matthieu Bécuwe ◽  
Ling Miao ◽  
Yury Gogotsi
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Three Dimensional ◽  
Covalent Functionalization ◽  
Redox Active ◽  
Reduced Graphene ◽  
One Step ◽  
Volumetric Capacitance ◽  
Graphene Oxide Sheets

Non-covalent functionalization of 2,5-dimethoxy-1,4-benzoquinone and hydroquinone on reduced graphene oxide sheets led to the formation of a redox-active three-dimensional gel architecture via a one-step hydrothermal method, where the former exhibited high gravimetric and volumetric capacitance and 99% capacitance retention after 25 000 cycles at 50 mV s−1.

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