“…The a-type has been primarily studied for glucose sensing because of its unique 2 × 2 and 1 × 1 tunnels, which promote electrode kinetics. 16,17 In contrast, despite b-MnO 2 being widely discussed as a material for Li-ion batteries 18,19 or supercapacitors 20,21 due to its high specic capacity, its use as an active material for glucose sensors has been reported in a few studies.…”