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Enhanced sheet conductivity of Langmuir–Blodgett assembled graphene thin films by chemical doping

2016; IOP Publishing; Volume: 3; Issue: 1 Linguagem: Inglês

10.1088/2053-1583/3/1/015002

2053-1583

Aleksandar Matković, Ivana Milošević, Marijana Milićević, Tijana Tomašević-Ilić, Jelena Pešić, Milenko Musić, Marko Spasenović, Ð. Jovanović, Borislav Vasić, Christopher Deeks, Radmila Panajotović, Milivoj R. Belić, Radoš Gajić,

Quantum and electron transport phenomena

We demonstrate a facile fabrication technique for highly conductive and transparent thin graphene films. Sheet conductivity of Langmuir–Blodgett assembled multi-layer graphene films is enhanced through doping with nitric acid, leading to a fivefold improvement while retaining the same transparency as un-doped films. Sheet resistivity of such chemically improved films reaches 10 , with optical transmittance 78% in the visible. When the films are encapsulated, the enhanced sheet conductivity effect is stable in time. In addition, stacking of multiple layers, as well as the dependence of the sheet resistivity upon axial strain have been investigated.