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Department of Chemistry

Prof. Emer. Hans Jørgen Jakobsen et al publish breaking NMR research on MoS2

Article published in the ACS Journal of Physical Chemistry C

Professor Emeritus Hans Jørgen Jakobsen. Photo: AU

A breaking solid-state 95Mo NMR research on MoS2 by Hans J. Jakobsen, Henrik Bildsøe, Martin Bondesgaard, Bo B. Iversen et al reveals a new, important T1-relaxation mechanism dubbed CSA (Chemical Shielding Anisotropy)-phonon relaxation, published in ACS J. Phys. Chem. C 2021, 125, 7824-7838, entitled "Exciting Opportunities for Solid-State 95Mo NMR Studies of MoS2 Nanostructures in Materials Research from a Low to an Ultrahigh Magnetic Field (35.2 T)"

The determined T1 CSA-phonon correlation times tc (nsec) correlate with the electronic band gap and number of layers in these 2D semiconductor nanomaterials. Experimental plots of T1(95Mo) versus tc for four different 2H-MoS2 samples at three different B0 fields (14.1 T, 19.6 T, 35.2 T) show that each 2H-MoS2 sample exhibits an identical electronic band gap independent of  B0, but which differs for each sample.

This research first became possible in 2018 with the opening of the homebuilt SCH (Series Connected Hybrid) 35.2 T magnet at the National High Magnetic Fields Lab (NHMFL or MagLab) in Tallahassee, Florida, a  B0 field larger by a factor 1.6 than the highest 22.3 T magnet available at Aarhus University.


Additional Information
External funding Danish National Research Foundation, the Villum Foundation, Haldor Topsøe A/S
Link to the scientific article https://pubs.acs.org/doi/10.1021/acs.jpcc.0c10522  Rating: Highest Top 10% for ACS J. Phys. Chem. C (2021) 
Contact information

Prof. Emer. Hans Jørgen Jakobsen, Department of Chemistry, Aarhus University, e-mail: hja@chem.au.dk