On Shui,..., & Xi Chen (Nat.Comm.(2020), 11(1), 1583) experiments showing increased adhesion when applying high-frequency vibrations

dear Friends

 Langquan Shui, Laibing Jia, Hangbo Li, Jiaojiao Guo, Ziyu Guo, Yilun Liu, Ze Liu & Xi Chen (Nat.Comm.(2020), 11(1), 1583) have made interesting experiments showing increased adhesion when applying high-frequency vibrations. The effect was explained by a non-symmetrical effect in the contact area oscillation ruled by the well known empirical Gent and Schultz law (GS). However, Shui et al solution (Eq.3) appears not to depend on GS constants, which appears incorrect, and makes the model not valid in the paper.    So I wrote a comment to Nat Comm to stimulate a discussion:
 https://www.researchgate.net/publication/385204728   If anyone is interested to discuss, please let me know. RegardsMike