  Ti$_3$C$_2$T$_X$ 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 nano- to 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 Ti$_3$C$_2$T$_x$ nano-sheet deposited on a
silicon dioxide substrate via friction force microscopy. Our experiments reveal
that few-layer Ti$_3$C$_2$T$_x$ 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
Ti$_3$C$_2$T$_X$ (MXene) nano-sheets.
