Self-assembled monolayer functionalized NiO nanowires: strategy to enhance the sensing performance of p-type metal oxide
Navpreet Kaur, Mandeep Singh, Andrea Casotto, L. Sangaletti, Elisabetta Comini
Abstract
A novel strategy for the improvement in the sensing performance of p-type NiO is developed by employing the unique functional properties of self-assembled monolayers. Specifically, hole concentration near the surface of NiO nanowires (NWs) is modulated by terminal epoxy groups of the organosilane. This modulation leads to the increase in electron transfer from reducing gases to NWs surface. As a result, SAM-functionalized sensors showed 9-times higher response at low-temperature as compared to bare NiO NWs.
Topics & Concepts
MonolayerNon-blocking I/OMaterials scienceOxideNanowireSelf-assembled monolayerMetalNanotechnologyChemical engineeringOptoelectronicsChemistryCatalysisMetallurgyOrganic chemistryEngineeringGas Sensing Nanomaterials and SensorsAnalytical Chemistry and SensorsZnO doping and properties