Self-assembled vertically stacked van der Waals In2O3/In2S3 heterojunction for ultra-sensitive room-temperature NO2 gas detection
Yinfen Cheng, Nianzhong Ma, Zhong Li, Xinyi Hu, Lieqi Liu, Yi Liang, Li Tao, Jian Zhen Ou
Abstract
by factors of 5.7 and 1.8, respectively. Furthermore, the sensor demonstrates outstanding selectivity, a low detection limit of 20.6 ppb, and excellent long-term stability. These superior sensing performances arise from optimized adsorption-desorption dynamics at the oxide/sulfide interface, enabled by the self-assembled vdW architecture. This study not only advances the scalable synthesis of 2D vdW heterostructures but also highlights interfacial engineering as a powerful strategy for designing next-generation, low-power gas sensors.
Topics & Concepts
Heterojunctionvan der Waals forceMaterials scienceNanotechnologyOptoelectronicsScalabilityCrystal (programming language)Detection limitLimit (mathematics)Photonic crystalEngineering physicsQuality (philosophy)Substrate (aquarium)Gas Sensing Nanomaterials and Sensors2D Materials and ApplicationsSolar-Powered Water Purification Methods