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...

scholarly journals Microencapsulated Multi-functionalized Graphene Oxide Equipped With Chloroquine for Efficient and Sustained Sirna Delivery

2021 ◽  
Author(s):  
Rana Imani ◽  
Satya Prakash ◽  
Hojatollah Vali ◽  
John F. Presley ◽  
Shahab Faghihi
Keyword(s):  
Graphene Oxide ◽  
Cellular Uptake ◽  
Sirna Delivery ◽  
Layer By Layer ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Lysosomal Ph ◽  
Intracellular Targeting ◽  
Lysosomotropic Agent ◽  
Layer Coating

Abstract A multi-functionalized graphene oxide (GO)-based carrier with conjugation of aminated-polyethylenglycole (PEG-diamine), octaarginine (R8) and folic acid (FA), which also contains chloroquine (CQ), a lysosomotropic agent, is introduced. The cellular uptake mechanisms and intracellular targeting of FA functionalized nanocarriers are examined. The localized releases of CQ and siRNA intracellular delivery are evaluated. Microencapsulation of the nanocarrier complexed with genes in layer-by-layer coating of alginate micro-beads is also investigated. The covalently co-conjugated FA with PEG and R8 provides a stable formulation with increased cellular uptake compared to FA-free carrier. The CQ-equipped nanocarrier shows a 95% release of CQ at lysosomal pH. The localized release of the drug inside the lysosomes is verified which accelerates the cargo discharge into cytoplasm.

Calixarene-functionalized graphene oxide composites fixed on glassy carbon electrodes for electrochemical detection

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91910-91920 ◽  
Author(s):  
Peng Zhang ◽  
Yaling Wang ◽  
Dongxiang Zhang ◽  
Cong Liu ◽  
Die Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Materials ◽  
Electrochemical Detection ◽  
Carbon Electrodes ◽  
Functionalized Graphene ◽  
Graphene Oxides ◽  
Covalent Functionalization ◽  
Functionalized Graphene Oxide ◽  
Glassy Carbon Electrodes ◽  
Oxide Composites

Four composite materials were prepared by grafting calixarene derivatives onto the surfaces of graphene oxide (GO) via covalent functionalization to yield covalently functionalized graphene oxides (CFGOs).

Polymer Functionalized Graphene Oxide: A Versatile Nanoplatform for Drug/Gene Delivery

2015 ◽  
Vol 19 (18) ◽  
pp. 1828-1837 ◽  
Author(s):  
George V. Theodosopoulos ◽  
Panayiotis Bilalis ◽  
Georgios Sakellariou
Keyword(s):  
Graphene Oxide ◽  
Gene Delivery ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide
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