Gas sensing behavior of electrospun nickel oxide nanofibers: Effect of morphology and microstructure

- Nickel oxide nanofibers were fabricated via electrospinning technique.
- Morphology and microstructure were controlled via solution composition.
- Annealing the nanofibers leads to their full crystallinity.
- An optimum solution composition produces nanofibers with maximum gas sensitivity.
- Crystallinity of nanofibers strongly influences the gas sensing behavior.