We demonstrate the preparation of both armchair and zigzag epitaxial graphene nanoribbons (GNRs) on 4H-SiC using a polymer-assisted, sublimation growth method. Historically, the preparation of GNRs depended on the quality, or smoothness, of the surface changes during growth. The physical phenomenon of terrace step formation introduces the risk of GNR deformation along sidewalls, but the risk is heavily mitigated by this polymer-assisted sublimation method. Two widths (100 nm and 50 nm) are examined electrically and optically for both armchair and zigzag GNRs. Our electrical results support the expected behaviors of the GNRs, while the optical signatures of variable strain reveal the subtle differences among all the GNR species measured.
@article{arxiv.2302.14693,
title = {Optical Signatures of Strain Differences in Epitaxial Graphene Nanoribbons},
author = {Heather M. Hill and Ching-Chen Yeh and Swapnil M. Mhatre and Ngoc Thanh Mai Tran and Hanbyul Jin and Adam J. Biacchi and Chi-Te Liang and Angela R. Hight Walker and Albert F. Rigosi},
journal= {arXiv preprint arXiv:2302.14693},
year = {2023}
}