Highly dendritic graphene crystals up to 0.25 mm in diameter are synthesized by low pressure chemical vapor deposition inside a copper enclosure. With their sixfold symmetry and fractal-like shape, the crystals resemble snowflakes. The evolution of the dendritic growth features is investigated for different growth conditions and surface diffusion is found to be the growth-limiting step responsible for the formation of dendrites. The electronic properties of the dendritic crystals are examined down to sub-Kelvin temperatures, showing a mobility of up to 6300 cm2V−1s−1 and quantum Hall oscillations are observed above 4T. These results demonstrate the high quality of the transport properties despite their rough dendritic edges.
@article{arxiv.1301.7033,
title = {Quantum Hall Effect in Fractal Graphene: Growth and Properties of Graphlocons},
author = {Mathieu Massicotte and Victor Yu and Eric Whiteway and Dan Vatnik and Michael Hilke},
journal= {arXiv preprint arXiv:1301.7033},
year = {2013}
}