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Poly(ethylene oxide) Functionalized Graphene Nanoribbons with Excellent Solution Processability.

Yinjuan Huang¹, Yiyong Mai¹, Uliana Beser²

¹School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , 800 Dongchuan RD, Shanghai 200240, China.

Journal of the American Chemical Society

|July 28, 2016

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This summary is machine-generated.

We synthesized defect-free graphene nanoribbons (GNRs) with poly(ethylene oxide) (PEO) side chains. This functionalization dramatically improved GNR dispersibility and enabled high-performance field-effect transistors.

Area of Science:

Materials Science
Nanotechnology
Polymer Chemistry

Background:

Graphene nanoribbons (GNRs) are promising semiconductor materials.
Functionalization of GNRs with polymers is an underexplored area.
Improved dispersibility is key for GNR applications.

Purpose of the Study:

To develop a bottom-up solution synthesis for polymer-grafted GNRs.
To investigate the impact of poly(ethylene oxide) (PEO) grafting on GNR properties.
To evaluate the performance of functionalized GNRs in electronic devices.

Main Methods:

Bottom-up solution synthesis of GNRs.
Grafting of poly(ethylene oxide) (PEO) side chains onto GNRs.
Characterization using scanning probe microscopy.

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Fabrication and testing of thin-film field-effect transistors (FETs).

Main Results:

Synthesized defect-free armchair GNRs (width 1.0-1.7 nm, length 15-60 nm) with a 1.3 eV bandgap.
Achieved record GNR dispersibility (∼1 mg mL⁻¹) in organic solvents and water via PEO grafting.
Observed supramolecular helical nanowire formation in water.
Demonstrated self-assembled monolayers of GNRs on graphite.
GNR-based FETs exhibited high carrier mobility (∼0.3 cm² V⁻¹ s⁻¹).

Conclusions:

PEO grafting significantly enhances GNR dispersibility and processability.
Polymer-functionalized GNRs show potential for self-assembly and nanowire formation.
These functionalized GNRs are promising for next-generation electronic devices.