Selective Bilayer-Al Removal in MoAlB Enables High-Yield Mo₂B₂ MBene with Enhanced Microwave Absorption Behavior
발표자
공상몽 (성균관대학교)
연구책임자
구종민 (성균관대학교)
초록
내용
Two-dimensional transition-metal borides (MBenes) have recently emerged as MXene-analogous materials, yet their synthesis remains challenging, particularly from MoAlB, whose characteristic Al–Al bilayer stacking hinders A-site removal. Here we report a concept-level, chemoselective route that extracts Al while preserving the in-plane Mo–B and B–B networks, yielding high-yield few-layer Mo₂B₂ MBene. The resulting 2D material exhibits strong microwave attenuation: at a total absorber thickness of 4.6 mm, the minimum reflection loss reaches −50.6 dB in the low-frequency regime. Structure–property analysis indicates that retention of B–B covalency and the Mo–B framework underpins effective dielectric loss and impedance matching. Beyond this specific system, the demonstrated selective removal of a double Al layer establishes a viable pathway toward broader MBene chemistries derived from Al-rich MAB phases..