fig1

Figure 1. (A) Fabrication of RGO microspheres via wet spinning technique and corresponding SEM image of their internal structure^[60]. Copyright 2017, Wiley-VCH GmbH; (B) Structural image of reduced graphene oxide aerogel microspheres exhibiting tree-ring-like structures with ordered interlayer spacing^[63]. Copyright 2023, Elsevier; (C) Synthesis process and various images of small-scale carbon/graphene hybrid aerogel microspheres^[65]. Copyright 2025, Wiley-VCH GmbH; (D) SEM image and XRD pattern of small-scale TiAlCo ceramic microspheres^[67]. Copyright 2016, Elsevier. RGO: Reduced graphene oxide; SEM: scanning electron microscopy; XRD: X-ray powder diffraction.