Comment on "Structure-Correlated Magnetic Resonance Transverse Relaxivity Enhancement in Superparamagnetic Ensembles with Complex Anisotropy Landscape".

In a recent article, Konwar et al. [ Langmuir 2022, 38, 11087-11098.] reported a new relationship between the structure of clusters of superparamagnetic nanoparticles and the proton nuclear magnetic resonance transverse relaxation they induce. In this comment, we would like to express reservations concerning the adequacy of the new relaxation model proposed in this work.