Journal
APPLIED SURFACE SCIENCE
Volume 535, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147664
Keywords
MXenes; Atomic force microscopy (AFM); Friction Force Microscopy (FFM); Nanotribology; Solid lubrication
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Funding
- Merced Nanomaterials Center for Energy and Sensing (MACES) via the National Aeronautics and Space Administration (NASA) [NNX15AQ01]
- ANID-CHILE within the project Fondecyt [11180121]
- VID of the University of Chile [UI013/2018]
- Chinese Academy of Sciences President's International Fellowship Initiative [2020VEC0006]
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Ti3C2Tx nano-sheets exhibit solid lubrication properties on the nanoscale, reducing friction on silicon dioxide substrates, although not as effectively as few-layer graphene. This paves the way for further investigations into nanoscale solid lubrication achieved by Ti3C2Tx (MXene) nano-sheets.
Ti3C2Tx nano-sheets (MXenes) are an emerging class of two-dimensional materials with outstanding potential to be employed in energy storage, catalysis, and triboelectric applications, on length scales ranging from the nanoto macroscopic. Despite rapidly accelerating interest in this new class of materials, their nanoscale frictional properties and in particular, their potential for solid lubrication on the nanoscale, have not been explored in detail yet. In this short communication, we present the first results on the nanoscale frictional characteristics of MXenes, in the form of a friction map obtained on an isolated Ti3C2Tx nano-sheet deposited on a silicon dioxide substrate via friction force microscopy. Our experiments reveal that few-layer Ti3C2Tx nano-sheets indeed act as solid lubricants on the nanoscale, reducing friction on the silicon dioxide substrates, although not as effectively as few-layer graphene. The results reported here pave the way for further studies focusing on nanoscale solid lubrication achieved by Ti3C2Tx (MXene) nano-sheets.
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