Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 138, Issue 32, Pages 10136-10139Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b07061
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Funding
- 973 Programs of China [2013CBA01602]
- Natural Science Foundation of China [21320102006, 21304057, 51573091]
- MPI Partner Group Project for Polymer Chemistry of GNRs
- EC under Graphene Flagship [CNECT-ICT-604391]
- European Union/ERC [340324]
- Villum Foundation [VKR023122]
- EPSRC [EP/N010345/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/N010345/1] Funding Source: researchfish
- Villum Fonden [00007271] Funding Source: researchfish
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Structurally well-defined graphene tianoribbons (GNRs) have attracted great interest as next generation semiconductor materials. The functionalization of GNRs with polymeric side chains, which can widely broaden GNR-related studies on physiochemical properties and potential applications, has remained unexplored. Here,;we demonstrate the bottom-tip solution synthesis of defect-free GNRs grafted with flexible poly(ethylene oxide) (PEO) chains. The GNR backbones possess an armchair edge structure with a width of 1.0-1.7 nm and mean lengths of 15-60 nm, enabling near-infrared absorption and a low bandgap of 1.3 eV. Remarkably, the PEO grafting renders the GNRs superb dispersibility in common organic solvents, with a record concentration of similar to 1 mg mI,(-1)(for GNR backbone) that is much higher than that (<0.01 mg mL(-1)) of reported GNRs. Moreover, the PEO-ftinctionalized GNRs can be readily dispersed in Water, accompanying with supramolecular helical nanowire formation. Scanning probe microscopy reveals raft -like self -assembled monolayers of uniform GNRs on graphite substrates. Thin-film-based field-effect transistors (FETs) of the GNRs exhibit a high carrier mobility of similar to 0.3 cm(2) V-1 s(-1), manifesting promising application of the polymerfunctionalized GNRs in electronic devices.
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