@article{114d695bdc7d42ca8f2ea37913a60c16,
title = "N-type graphene induced by dissociative H2 adsorption at room temperature",
abstract = "Studies of the interaction between hydrogen and graphene have been increasingly required due to the indispensable modulation of the electronic structure of graphene for device applications and the possibility of using graphene as a hydrogen storage material. Here, we report on the behaviour of molecular hydrogen on graphene using the gate voltage-dependent resistance of single-, bi-, and multi-layer graphene sheets as a function of H2 gas pressure up to 24 bar from 300 K to 345 K. Upon H2 exposure, the charge neutrality point shifts toward the negative gate voltage region, indicating n-type doping, and distinct Raman signature changes, increases in the interlayer distance of multi-layer graphene, and a decrease in the d-spacing occur, as determined by TEM. These results demonstrate the occurrence of dissociative H2 adsorption due to the existence of vacancy defects on graphene.",
author = "Kim, {Byung Hoon} and Hong, {Sung Ju} and Baek, {Seung Jae} and Jeong, {Hu Young} and Noejung Park and Muyoung Lee and Lee, {Sang Wook} and Min Park and Chu, {Seung Wan} and Shin, {Hyeon Suk} and Jeongmin Lim and Lee, {Jeong Chul} and Yongseok Jun and Park, {Yung Woo}",
note = "Funding Information: We thank K. S. Novoselov, P. Kim, and C. N. R. Rao for helpful discussions and comments and H.J. Kim for supporting the manufacture of the high-pressure chamber. N.P. was supported by the Hydrogen Energy R&D Center, a 21st Century Frontier R&D Program funded by the Ministry of Science and Technology of Korea. Y.W.P. acknowledges support from the GRDC (2009-00514) through the Ministry of Education, Science and Technology (MEST), Korea. S.W.L. acknowledges support from the WCU program of the MEST (R31-2008-000-10057-0) and from the NRF (2011-0021207). Y. J. acknowledges support from MEST (20120002424, 2012K001288).",
year = "2012",
doi = "10.1038/srep00690",
language = "English",
volume = "2",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}