Direct e-beam writing of thin carbon nanoribbons
(Color online) (a) Schematic representation of the fabrication of nanosheets and their transfer onto arbitrary substrates. A self-assembled monolayer of BPT is cross-linked by electron irradiation (1). The resulting nanosheet can be released from the substrate (2) and transferred to solid substrates (3) or over the openings of a grid (4). (b) Optical micrograph of a large piece of nanosheet transferred onto a Si wafer containing a thick layer of native . (c) Nanosheet spanned over the openings of a TEM grid. (d) AFM image of the edges of a transferred nanosheet, the corresponding line scan shows a sheet thickness of .
(Color online) XPS analysis of the formation and pyrolysis at of the nanosheet on (a) Au and after transfer to (b) . The cross-linking of the monolayer is shown schematically in (c).
(Color online) Room temperature nanosheet conductivity as a function of the annealing temperature in UHV. [(a)–(c)] Linear current-voltage characteristics for different annealing temperatures. (d) Summary of the conductivity for different annealing temperatures. The inset is a photograph of the experimental four-point measurement setup.
(Color online) (a) SEM image of carbon nanosheet patterns formed by thermal desorption lithography. (b) Lines and spaces of can be resolved at a dose of .
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