Hai Van

4 Questions 4 Answers 0 Followers

Questions related from Hai Van

How can I use Raman to characterize the number of walls of multiwalled CNTs?

Can we use Raman spectra (D band, G band, ID/IG, etc) to characterize or determine the change of number of walls of multiwalled CNTs? I guess it should affect D band when wall number...

29 September 2015 7,641 4 View

How does graphene behave when heated fast and cooled down fast?

More than 1000oC is suitable for the reorganization of carbon atoms (i.e. recrystalization) on graphene to happen. If the heating time is several minutes long, defects like vacancies or distorted...

30 August 2015 3,906 5 View

What is is the threshold temperature for CNTs transforming to armousphous carbon and completely evaporating?

I am currently doing thermal treatment for CNTs and graphene in the vacuum environment. I understand that the carbon atoms on the surface of CNTs and graphene reorganize at high temperature....

31 July 2015 8,459 9 View

What is the meaning of the D' band (~1620 cm-1) of carbon nanotubes?

I understand that similar to D band, D' band relates to the defect of CNT structure. But in details, how different are D band and D' band? What kind of defect does each band describe? Thanks

29 July 2015 5,777 4 View