# What's the past and future of 2D materials since graphene?

Since the discovery of graphene in 2004, two-dimensional (2D) materials have been a hot topic in the community of condensed matter physics, which can be considered as the candidate for next-generation electronics and also as an important platform to demonstrate interesting physics.

Almost 20 years have gone by, what're the big things that happened in this field, for example in nanoelectronics, and what's the challenge for the future?

There is also plenty of activity in transition metal dichalcogenides ("TMDs"), van der Waals magnets such as CrI$$_3$$, and MXenes. Here is a 2015 review on 2D materials beyond graphene. One of the practical challenges with 2Ds TMDs is a large contact resistance that so far seems to limit their usefulness for electronics. I'm not sure what the other challenges are. However, similar to graphene mentioned above, many of these materials are now being investigated in few-layer systems, where there may be interesting stacking-dependent behavior and moiré physics.