Why is graphene hexagon?
Why is graphene hexagon?
Graphene consists of an atom-thick sp2 hybridized carbon sheet, in which each carbon atom is bonded to three carbon atoms, thus forming a hexagonal framework with bond lengths of 1.42 Å.
How is graphene functionalized?
The organic covalent functionalization reactions of graphene include two general routes: (a) the formation of covalent bonds between free radicals or dienophiles and C═C bonds of pristine graphene and (b) the formation of covalent bonds between organic functional groups and the oxygen groups of GO.
Which type of substance is graphene?
Understanding graphene Graphene is a single layer (monolayer) of carbon atoms, tightly bound in a hexagonal honeycomb lattice. It is an allotrope of carbon in the form of a plane of sp2-bonded atoms with a molecular bond length of 0.142 nanometres.
What structure is graphene?
hexagonal
Graphene is a two-dimensional carbon allotrope. It is composed of carbon atoms positioned in a hexagonal design, which can be said to resemble a chicken wire. A single layer of carbon atoms arranged in such a honeycomb structure forms a single graphene sheet.
What is so special about graphene?
What makes graphene so special is its sp2 hybridisation and very thin atomic thickness (of 0.345 nm). These properties are what enable graphene to break so many records in terms of strength, electricity and heat conduction (as well as many others).
Why is graphene honeycomb?
Graphene is often described as having a honeycomb or chicken wire structure because it consists of carbon atoms arranged in a single-layer-thick hexagonal lattice. In this 2D structure, every carbon atom is connected to three other carbon atoms.
What does functionalized mean?
Definition of functionalize 1 : to cause to be functional. 2 : to organize (as work or management) into units performing specialized tasks.
Why functionalization of graphene is important?
Functionalization and dispersion of graphene sheets are of crucial importance for their end applications. Chemical functionalization of graphene enables this material to be processed by solvent-assisted techniques, such as layer-by-layer assembly, spin-coating, and filtration.
What graphene is used for?
Graphene has a lot of promise for additional applications: anti-corrosion coatings and paints, efficient and precise sensors, faster and efficient electronics, flexible displays, efficient solar panels, faster DNA sequencing, drug delivery, and more.
What type of smart material is graphene?
Graphene is an ideal electrode material for electrochemical biosensors because of its high conductivity, large specific surface area and excellent electrochemical stability in aqueous media.
What are the three unique properties of graphene?
Graphene has a unique combination of properties that is ideal for next-generation electronics, including mechanical flexibility, high electrical conductivity, and chemical stability.
Is graphene harmful to the human body?
Concentration. Numerous results have shown that graphene materials cause dose-dependent toxicity in animals and cells, such as liver and kidney injury, lung granuloma formation, decreased cell viability and cell apoptosis [130–134].