Experimental Realization of Mixed-Dimensional 1D-Graphyne-Nanowires/2D-AgTe-Monolayer Heterostructures

• • The AgTe monolayer intercalation decouples the GY nanowire from the Ag(111) substrate, as evidenced by the emergence of clear VBM and CBM peaks in STS, with a measured bandgap of 2.0 eV for the GY nanowire on AgTe, compared to obscured features on Ag(111). This decoupling is critical for reliable electronic characterization and device integration. • • The AgTe monolayer exhibits a bandgap of 0.95 eV (VBM at -320 mV, CBM at 630 mV), and the heterostructure forms a type-I band alignment, confining both electrons and holes in the GY nanowire. This alignment is essential for applications in light emission and quantum confinement. • • The lattice constant of the AgTe monolayer is measured to be 0.48 nm, consistent with previous reports, confirming the structural integrity of the intercalated layer. This precise lattice matching is vital for scalable heteroepitaxy. • • The work function difference between GY nanowire and AgTe drives electron transfer from GY to AgTe, leading to Fermi level alignment and type-I heterostructure formation. This charge engineering mechanism provides a tunable parameter for designing future 1D/2D heterostructures with desired electronic functionalities.