@article{6265617e024d482f8f9ae38148a8f3e5,
title = "Diamagnetism of carbon onions probed by NMR of adsorbed water",
abstract = "We measured the 1H chemical shift of water molecules adsorbed on defect sites of carbon onions and compared it with the shifts of bulk water and water adsorbed by chemically-derived graphene, graphene oxide and nanodiamond. The positions of 1H resonances for insulator nanodiamond and graphene oxide are close to that of bulk water, while water molecules adsorbed by graphene, and particularly by carbon onions, reveal a significant deviation in chemical shift from that of bulk water, which can be attributed to the diamagnetic screening effect of the conducting graphene layers. This conclusion is supported by a pronounced correlation established in our experiments between the proton chemical shifts and diamagnetic contribution to the magnetic susceptibility.",
keywords = "Carbon onions, Diamagnetism, Graphene, Nuclear magnetic resonance",
author = "Panich, {A. M.} and Osipov, {V. Yu} and K. Takai",
note = "Funding Information: We thank Dr. J Edgeworth, Dr A E Aleksenskii and Dr A T Dideikin for supplying us with the graphene oxide and chemically derived graphene and Dr M Tsindlekht for magnetic susceptibility measurements of these samples. We thank Prof. E Yasuda from Tokyo Institute of Technology and Prof. T Hayashi from Shinshu University (Nagano) for help in synthesis of the carbon onions and taking their HRTEM images. We also thank the Russian Foundation for Basic Research and Japan Society for the Promotion of Science for support within the grant RFBR 12-02-92107-ЯФ_а under the Japan-Russia Research Cooperative Program, and Department of Chemistry of Tokyo Institute of Technology for possibility to use their equipment. The work in Israel was partially supported by the grant of the Israeli Ministry of Science & Technology No. 3-9754. Publisher Copyright: {\textcopyright}, 2014, Editorial Board of New Carbon Materials. All right reserved.",
year = "2014",
month = oct,
day = "1",
doi = "10.1016/S1872-5805(14)60145-1",
language = "English",
volume = "29",
pages = "392--397",
journal = "Xinxing Tan Cailiao/New Carbon Materials",
issn = "1007-8827",
publisher = "Editorial Board of New Carbon Materials",
number = "5",
}