Manipulating the Temperature of Sulfurization to Synthesize α-NiS Nanosphere Film for Long-Term Preservation of Non-enzymatic Glucose Sensors

FE-SEM images of the nickel films. a, b Top view of the nickel nanosheet film was electrodeposited at 3.0 V DC. Inset: cross-section of the nickel nanosheet film. c Top view of the nickel film was electrodeposited at 4.0 V DC. d The XRD patterns of nickel films were electrodeposited at various potentials (3.0 and 4.0 V DC