Try here:

Liang-Xu Dong, Qiang Chen, "Properties, synthesis, and characterization of graphene", Frontiers of Materials Science in China, 2010, 4, 45-51

http://link.springer.com/article/10.1007%2Fs11706-010-0014-3

and here:

http://onlinelibrary.wiley.com/doi/10.1002/9783527651122.ch1/summary

Http://www-g.eng.cam.ac.uk/nms/

You may find the best tool in the following article:

Raman Spectroscopic Characterization of Graphene

Bo Tang, Hu Guoxin & Hanyang Gao,

Applied Spectroscopy Reviews, Volume 45, Issue 5, 2010,pages 369-407.

Also, you can see the following article:

Properties, synthesis and characterization of graphene

L. X. Dong, Q. Chen

Front. Mater. Sci. China, 4, 45 (2010).

Just to stir things up....

https://www.materials-talks.com/blog/2014/02/06/characterization-is-a-number-42-not-a-goal/