Graphene, laterally confined within narrow ribbons, exhibits a bandgap and is envisioned as a next-generation material for high-performance electronics. To take advantage of this phenomenon, there is a critical need to develop methodologies that result in graphene ribbons <10 nm in width. Here we report the use of metal salts infused within stretched DNA as catalysts to grow nanoscopic graphitic nanoribbons. The nanoribbons are termed graphitic as they have been determined to consist of regions of sp 2 and sp 3 character. The nanoscopic graphitic nanoribbons are micrometres in length, <10 nm in width, and take on the shape of the DNA template. The DNA strand is converted to a graphitic nanoribbon by utilizing chemical vapour deposition conditions. Depending on the growth conditions, metallic or semiconducting graphitic nanoribbons are formed. Improvements in the growth method have potential to lead to bottom-up synthesis of pristine single-layer graphene nanoribbons.
Bibliographical noteFunding Information:
F.L.Y. thanks the Agency for Science, Technology and Research (A*STAR) for her postdoctoral fellowship. Z.B. acknowledge partial support from the National Science Foundation (DMR-EPS 1006989), the Stanford Global Climate and Energy Program and the David Filo and Jerry Yang Faculty Fellow. We thank M.R. Dokmeci at Northeastern University for providing the parylene-C masks. A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. We acknowledge Professor Hari Manoharan, Alex Contryman, Luckshihta Suriyasena Liyanage, Peng Wei, Steve Park, Alex Azyner, Ying Diao and Sangwon Lee for experimental support and discussions.
All Science Journal Classification (ASJC) codes
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)