Controllable synthesis of platinum diselenide (PtSe2) inorganic fullerene

摘要: Layered transition metal dichalcogenide (TMD) crystals in reduced dimensions have exhibited a wide range of extraordinary physical and chemical properties spanning from exotic quantum phenomena to unusually superior reactivity. Their anisotropic van der Waals (vdW) bonding nature enables them commonly possess two-dimensional (2D) structures which been rigorously investigated recently. Nonetheless, TMD quasi zero-dimensional (0D) forms, i.e., fullerenes, not explored depth the perspective reproducible synthesis process–structure correlation. Herein, we report controlled inorganic fullerene platinum diselenide (PtSe2) via thermal selenization Pt nanostructured precursors. We identified conversion nanocubes PtSe2 “onion-like” dictated by well-defined isotropic volume expansion. Extensive transmission electron microscopy (TEM) inspections revealed that there exists certain size-dependency leads preferable growth fullerenes over 2D platelets. The underlying principle for this size-dependent is discussed context surface energy minimization. Furthermore, were verified large degree unsaturated dangling bonds as well internal strain, Raman spectroscopy X-ray photoelectron (XPS) geometric phase analysis (GPA). This study sheds light on synthesizing TMD-based will foster discovery novel 0D material systems.