Conversion of 2D MXene to Multi‐Low‐Dimensional GerMXene Superlattice Heterostructure

Integration of 2D structures into other low‐dimensional materials results in the development of distinct van der Waals heterostructures (vdWHSs) with enhanced properties. However, obtaining 2D–1D–0D vdWHSs of technologically useful next generation materials, transition‐metal carbide MXene and monoelemental Xene nanosheets in a single superlattice heterostructure is still challenging. Here, the fabrication of a new multidimensional superlattice heterostructure “GerMXene” from exfoliated M3X2Tx MXene and hydrogenated germanane (GeH) crystals, is reported. Direct experimental evidence for conversion of hydrothermally activated titanium carbide MXene (A‐MXene) to GerMXene heterostructure through the rapid and spontaneous formation of titanium germanide (TiGe2 and Ti6Ge5) bonds, is provided. The obtained GerMXene heterostructure possesses enhanced surface properties, aqueous dispersibility, and Dirac signature of embedded GeH nanosheets as well as quantum dots. GerMXene exhibits functional bioactivity, electrical conductivity, and negative surface charge, paving ways for its applications in biomedical field, electronics, and energy storage. Synthesis of new multidimensional superlattice heterostructure “GerMXene” from MXene and Xene nanosheets is reported. This protocol demonstrates the conversion of 2D transition‐metal carbide MXene to a quantum‐manipulated heterostructure with unique structural and material properties. GerMXene crystals possess high surface activity and electro‐conductivity, suggesting its potential applications in multiple fields. Furthermore, GerMXene displays excellent bioactivity for tissue engineering and regenerative medicine.