Direct writing on graphene 'paper' by manipulating electrons as 'invisible ink'
Nanotechnology (2013) - Comment
pubmed: 23743445  doi: 10.1088/0957-4484/24/27/275301  issn: 1361-6528  issn: 0957-4484 

Wei Zhang, Qiang Zhang, Meng-Qiang Zhao, Luise Theil Theil Kuhn