Journal
NANO LETTERS
Volume 20, Issue 8, Pages 6120-6127Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02221
Keywords
two-dimensional materials; transition-metal dichalcogenides; layer-dependent electrical properties; room-temperature sensor
Categories
Funding
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, within the sp2-bonded Materials Program [DE-AC02-05-CH11231, KC2207]
- National Science Foundation [DMR-1807233, DMR-1926004]
Ask authors/readers for more resources
The development of room-temperature sensing devices for detecting small concentrations of molecular species is imperative for a wide range of low-power sensor applications. We demonstrate a room-temperature, highly sensitive, selective, stable, and reversible chemical sensor based on a monolayer of the transition-metal dichalcogenide Re0.5Nb0.5S2. The sensing device exhibits a thickness-dependent carrier type, and upon exposure to NO2 molecules, its electrical resistance considerably increases or decreases depending on the layer number. The sensor is selective to NO2 with only minimal response to other gases such as NH3, CH2O, and CO2. In the presence of humidity, not only are the sensing properties not deteriorated but also the monolayer sensor shows complete reversibility with fast recovery at room temperature. We present a theoretical analysis of the sensing platform and identify the atomically sensitive transduction mechanism.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available