Room Temperature and Humidity Resistant NH3 Detection Based on a Composite of Hydrophobic CNTs with Sulfur Nanosheets

concentrations down to ppb level under high humidity. The fabricated gas sensor exhibited fast response/recovery (18/26 s) and good stability. Online monitoring for exhaled breath analysis shows good recovery with a stable baseline, providing a potential practical application. The research also facilitates the development of commercial low-cost breath analysis sensors.