Diamagnetism of carbon onions probed by NMR of adsorbed water
Source abstract
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.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphene research and applications · Diamond and Carbon-based Materials Research · Advanced NMR Techniques and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. The magnetic and other properties of the free electrons in graphite [J]
2. Magnetic susceptibility of carbon structures [J]10.1103/PhysRevB.49.15122 ↗
3. Diamagnetism of graphite [J]10.1103/PhysRev.104.666 ↗
4. Orbital diamagnetism in multilayer graphenes: Systematic study with the effective mass approximation [J]10.1103/PhysRevB.76.085425 ↗
5. Anomalous orbital magnetism in dirac-electron systems: Role of pseudospin paramagnetism [J]10.1103/PhysRevB.81.195431 ↗
6. Stage dependence of magnetic susceptibility of intercalated graphite [J]10.1103/PhysRevB.30.421 ↗
7. Theory of magnetic susceptibility of graphite intercalation compounds [J]10.1103/PhysRevB.20.4889 ↗
8. Limits on intrinsic magnetism in graphene [J]10.1103/PhysRevLett.105.207205 ↗
9. Unique magnetism observed in single-wall carbon nanohorns [J]10.1007/s003390100794 ↗
10. The electronic properties of graphene [J]10.1103/RevModPhys.81.109 ↗
11. Semiconductivity and diamagnetism of polycrystalline graphite and condensed ring system [J]10.1103/PhysRev.85.609 ↗
12. Diamagnetism of graphite [J]10.1103/PhysRevB.9.2467 ↗
13. Magnetic susceptibility of carbons and polycrystalline graphites [J]10.1103/PhysRev.94.319 ↗
14. Can doping graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated graphite powder [J]10.1002/adma.201202219 ↗
15. Magnetic resonance evidence of manganese–graphene complexes in reduced graphene oxide [J]10.1016/j.ssc.2012.01.005 ↗
16. Paramagnetic impurities in graphene oxide [J]10.1007/s00723-012-0392-z ↗
17. Nuclear magnetic resonance studies of nanodiamonds [J]10.1080/10408436.2011.606930 ↗
18. Hydroxylated detonation nanodiamond: FTIR, XPS and NMR studies [J]10.1021/jp205389m ↗
19. Proton magnetic resonance study of diamond nanoparticles decorated by transition metal ions [J]10.1088/0022-3727/44/12/125303 ↗
20. Solid state 19F NMR study of acceptor-doped fullerenes (MF6) 2C60 (M = As, Sb) [J]10.1016/S0921-4526(02)01708-8 ↗
21. Ionic and molecular diffusion and order-disorder phase transition in the thallium form of matrolite [J]10.1007/BF00752014 ↗
22. Magnetic and high resolution TEM studies of nanographite derived from nanodiamond [J]10.1016/j.carbon.2005.10.047 ↗
23. Nanophase of water in nano-diamond gel [J]10.1021/jp0683420 ↗
24. Contribution of functional groups to the raman spectrum of nanodiamond powders [J]10.1021/cm802057q ↗
25. FTIR study of the adsorption of water on ultradispersed diamond powder surface [J]10.1016/S0169-4332(98)00209-8 ↗
26. Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide [J]10.1016/j.carbon.2007.02.034 ↗
27. Solid-state NMR studies of the structure of graphite oxide [J]10.1021/jp961563t ↗
28. Günther · 1980
29. Diamagnetic susceptibility of tetrahedral semiconductors [J]10.1103/PhysRevLett.33.1552 ↗
30. Chemical vapor deposition repair of graphene oxide: A route to highly conductive graphene monolayers [J]10.1002/adma.200901582 ↗
31. High-throughput solution processing of large-scale grapheme [J]10.1038/nnano.2008.329 ↗
32. Electrically controlled adsorption of oxygen in bilayer graphene devices [J]10.1021/nl202002p ↗
33. Structural and magnetic resonance study of astralen nanoparticles [J]10.1016/j.diamond.2008.10.056 ↗
34. Closed π-electron network in large polyhedral multi-shell carbon nanoparticles [J]10.1166/nnl.2011.1117 ↗
35. Large anisotropy and stage dependence of the magnetic susceptibility of alkah-graphite intercalation compounds [J]10.1103/PhysRevB.20.4883 ↗