Abstract:
:Two-dimensional transition metal carbides (MXenes) have attracted a great interest of the research community as a relatively recently discovered large class of materials with unique electronic and optical properties. Understanding of adhesion between MXenes and various substrates is critically important for MXene device fabrication and performance. We report results of direct atomic force microscopy (AFM) measurements of adhesion of two MXenes (Ti3C2Tx and Ti2CTx) with a SiO2 coated Si spherical tip. The Maugis-Dugdale theory was applied to convert the AFM measured adhesion force to adhesion energy, while taking into account surface roughness. The obtained adhesion energies were compared with those for mono-, bi-, and tri-layer graphene, as well as SiO2 substrates. The average adhesion energies for the MXenes are 0.90 ± 0.03 J m-2 and 0.40 ± 0.02 J m-2 for thicker Ti3C2Tx and thinner Ti2CTx, respectively, which is of the same order of magnitude as that between graphene and silica tip.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li Y,Huang S,Wei C,Wu C,Mochalin VNdoi
10.1038/s41467-019-10982-8subject
Has Abstractpub_date
2019-07-08 00:00:00pages
3014issue
1issn
2041-1723pii
10.1038/s41467-019-10982-8journal_volume
10pub_type
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