Fig. 2. Carbon-based CHs. (A) CNT-based CHs. Reproduced from ref. 39 with the permission of Elsevier, copyright 2019. (B) Graphene oxide (GO)-based CHs. Reproduced from ref. 40 with the permission of Wiley-VCH, copyright 2019. (C) MXene-based CHs. Reproduced from ref. 57 with the permission of Elsevier, copyright 2021.
