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Large area van der Waals (vdW) thin films are assembled materials consisting of a network of randomly stacked nanosheets. The multiscale structure and the two-dimensional (2D) nature of the building block mean that interfaces naturally play a crucial role in the charge transport of such thin films. While single or few stacked nanosheets (i.e., vdW heterostructures) have been the subject of intensive works, little is known about how charges travel through multilayered, more disordered networks. Here, we report a comprehensive study of a prototypical system given by networks of randomly stacked reduced graphene oxide 2D nanosheets, whose chemical and geometrical properties can be controlled independently, permitting to explore percolated networks ranging from a single nanosheet to some billions with room-temperature resistivity spanning from 10–5 to 10–1 Ω·m. We systematically observe a clear transition …
American Chemical Society
Publication date: 
19 Jan 2021

Alessandro Kovtun, Andrea Candini, Anna Vianelli, Alex Boschi, Simone Dell’Elce, Marco Gobbi, Kyung Ho Kim, Samuel Lara Avila, Paolo Samorì, Marco Affronte, Andrea Liscio, Vincenzo Palermo

Biblio References: 
Volume: 15 Issue: 2 Pages: 2654-2667
ACS nano