Fabrication of Ni–Mo–Nb metallic glass/micro-nano lattice composite for nonenzymatic glucose sensing

The rising global diabetic population has ignited significant interest in enzyme-free electrochemical glucose sensors.However,their widespread usage has been severely impeded by the lack of sensing probes with both high sensitivity and stability.In this work,we present a novel approach for conformally depositing a Ni-Mo-Nb metallic-glass film onto a three-dimensional printed polymer skeleton for glucose detection.The printing template is designed based on a six-membered tricapped trigonal prism(6M-TTP) structure,which is derived from a medium-range order structure motif observed in amorphous alloys.The fabricated composite combines the high electrochemical activity of Ni-Mo-Nb amorphous alloy with the stability afforded by the micro-nano lattice structure,resulting in a high sensitivity(482 μA mM-1cm-2),a wide linear range(0-1 mM and 1-5 mM),a low detection limit(2.94 μM),and good long-term stability and selectivity in alkaline solution.Our work has proposed a new avenue to fabricate complex micro-nano electrodes,potentially offering significant versatility and great promise for widespread applications in the field of electrochemistry.