Details

Autor(en) / Beteiligte

• Narita, Akimitsu
• Feng, Xinliang
• Hernandez, Yenny
• Jensen, Søren A
• Bonn, Mischa
• Yang, Huafeng
• Verzhbitskiy, Ivan A
• Casiraghi, Cinzia
• Hansen, Michael Ryan
• Koch, Amelie H R
• Fytas, George
• Ivasenko, Oleksandr
• Li, Bing
• Mali, Kunal S
• Balandina, Tatyana
• Mahesh, Sankarapillai
• De Feyter, Steven
• Müllen, Klaus

Titel

Synthesis of structurally well-defined and liquid-phase-processable graphene nanoribbons

Ist Teil von

• Nature chemistry, 2014-02, Vol.6 (2), p.126

Ort / Verlag

England

Erscheinungsjahr

2014

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• The properties of graphene nanoribbons (GNRs) make them good candidates for next-generation electronic materials. Whereas 'top-down' methods, such as the lithographical patterning of graphene and the unzipping of carbon nanotubes, give mixtures of different GNRs, structurally well-defined GNRs can be made using a 'bottom-up' organic synthesis approach through solution-mediated or surface-assisted cyclodehydrogenation reactions. Specifically, non-planar polyphenylene precursors were first 'built up' from small molecules, and then 'graphitized' and 'planarized' to yield GNRs. However, fabrication of processable and longitudinally well-extended GNRs has remained a major challenge. Here we report a bottom-up solution synthesis of long (>200 nm) liquid-phase-processable GNRs with a well-defined structure and a large optical bandgap of 1.88 eV. Self-assembled monolayers of GNRs can be observed by scanning probe microscopy, and non-contact time-resolved terahertz conductivity measurements reveal excellent charge-carrier mobility within individual GNRs. Such structurally well-defined GNRs may prove useful for fundamental studies of graphene nanostructures, as well as the development of GNR-based nanoelectronics.