Heterostructures through Divergent Edge Reconstruction in Nitrogen-Doped Segmented Graphene Nanoribbons

Atomically precise engineering of defined segments within individual graphene nanoribbons (GNRs) represents a key enabling technology for the development of advanced functional device architectures. Here, the bottom‐up synthesis of chevron GNRs decorated with reactive functional groups derived from...

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Bibliographic Details
Published in:Chemistry : a European journal 2016-09, Vol.22 (37), p.13037-13040
Main Authors: Marangoni, Tomas, Haberer, Danny, Rizzo, Daniel J., Cloke, Ryan R., Fischer, Felix R.
Format: Article
Language:English
Subjects:
Architecture
Carbazoles
Chemistry
Devices
Graphene
Heterostructures
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Nanostructure
nanostructures
nc-AFM
Precursors
Reconstruction
STM
surface chemistry
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Summary:Atomically precise engineering of defined segments within individual graphene nanoribbons (GNRs) represents a key enabling technology for the development of advanced functional device architectures. Here, the bottom‐up synthesis of chevron GNRs decorated with reactive functional groups derived from 9‐methyl‐9H‐carbazole is reported. Scanning tunneling and non‐contact atomic force microscopy reveal that a thermal activation of GNRs induces the rearrangement of the electron‐rich carbazole into an electron‐deficient phenanthridine. The selective chemical edge‐reconstruction of carbazole‐substituted chevron GNRs represents a practical strategy for the controlled fabrication of spatially defined GNR heterostructures from a single molecular precursor. GNR, appetite for reconstruction: A new type of surface‐mediated ring‐expansion reaction has been used to create graphene nanoribbon (GNR) heterostructures, starting from a single molecular precursor. The newly developed GNR heterostructure is decorated with electron‐rich carbazole and electron‐deficient phenanthridine substituents along its edges. This new method paves the way toward the rational bottom‐up fabrication of GNR heterojunctions for functional device architectures (see figure).
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201603497