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cond-mat.mes-hall2009★ 401 cited
The role of contacts in graphene transistors: A scanning photocurrent study
T. Mueller, F. Xia, M. Freitag +2
A near-field scanning optical microscope is used to locally induce photocurrent in a graphene transistor with high spatial resolution. By analyzing the spatially resolved photo-res…
cond-mat.mes-hall2008★ 484 cited
Chemical Doping and Electron-Hole Conduction Asymmetry in Graphene Devices
Damon B. Farmer, Roksana Golizadeh-Mojarad, Vasili Perebeinos +4
We investigate polyethylene imine and diazonium salts as stable, complementary dopants on graphene. Transport in graphene devices doped with these molecules exhibits asymmetry in e…