These defects in graphene lattice are observed as line defects that are formed by chains of aligned dislocations. What are they?

These defects in graphene lattice are observed as line defects that are formed by chains of aligned dislocations. What are they? Correct Answer Grain boundaries

Grain boundaries are topological defects found in graphene. They are observed as a type of line defect formed by one dimensional chains of aligned dislocations. They are the interfaces between the domains of material with various crystallographic orientations.
Bissoy MCQ

Related Questions

Which of the following statements are true about edge dislocations?
P. Edge dislocations do not have an extra half plane associated with them.
Q. The Burger vectors is perpendicular to the direction.
R. Edge dislocations can avoid obstacles by cross-slip.
S. Depending on geometry, parallel edge dislocations of opposite signs can attract or repel one another.
Screw dislocations with jogs are __________ mobile than edge dislocations. Screw dislocations without jog move __________ from one plane to another than edge dislocation.
Two opposite sign dislocations are separated by 100 nm in iron with grain size 4 mm. Determine the attractive force and total force on the two dislocations? Shear modulus of iron is 80 GPa, and the lattice parameter is 2.86 Ao
What is the bond length of the σ-bond formed between two carbon atoms in the graphene lattice?
The dislocations in the material only act as strong obstacles to the movement of other dislocations.
Edge dislocations have _____ stress field therefore _____ interactions can occur between parallel edge dislocations.
Screw dislocations of opposite sign having same Burgers vector ____ each other and two parallel edge dislocations of same sign on same plane ____ each other.
The nature of force between dislocations depends on the relative position of dislocations.
The movement of jogged dislocations is ___________ than dislocations having no jogs.
The formation of jogs in screw dislocations _________ its motion. Jogs in edge dislocations _________ its motion.