Black phosphorus (BP) atomic layers are known to undergo chemical degradation in humid air. Yet in more robust configurations such as films, composites, and embedded structures, BP can potentially be utilized in a large number of practical applications. In this study, we explored the sensing characteristics of BP films and observed an ultrasensitive and selective response toward humid air with a trace-level detection capability and a very minor drift over time. Our experiments show that the drain current of the BP sensor increases by ∼4 orders of magnitude as the relative humidity (RH) varies from 10

作者：Poya, Yasaei；Amirhossein, Behranginia；Tara, Foroozan；Mohammad, Asadi；Kibum, Kim；Fatemeh, Khalili-Araghi；Amin, Salehi-Khojin

来源：ACS nano 2015 年 9卷 10期