Fig. 1From: Roles of MXenes in biomedical applications: recent developments and prospectsa Elements in the Periodic table that are known to form Mn+1AXn phases. b Structure of MAX phases and the corresponding MXenes. c (i) SEM images of Nb2AlC ceramic bulk (MAX phase). (ii) SEM image of multilayer Nb2CTx. (iii) Dark-field TEM image of single-layer Nb2CTx. Reproduced with permission from Ref. [18], © John Wiley and Sons 2017Back to article page