Suspended SnS₂ Layers by Light Assistance for Ultrasensitive Ammonia Detection at Room Temperature

2D materials are extensively studied as candidates for chemical sensors due to their large surface‐to‐volume‐ratio and the low working temperature. However, the performance of 2D material‐based sensors is limited when detecting ammonia, due to the weak binding between ammonia molecules and channel materials. Previous reports show sensitivity in the ppb range upon NO 2 exposure, and in ppm levels of ammonia under the same conditions. Compared...