High-Performance Atomically-Thin Room-Temperature NO2 Sensor
- Univ. of California, Berkeley, CA (United States). Kavli Energy NanoScience Inst.
- Univ. of California, Berkeley, CA (United States). Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
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. Here, we demonstrate a room-temperature, highly sensitive, selective, and reversible chemical sensor based on a monolayer of the transition metal dichalcogenide Re0.5Nb0.5S2. The sensing device exhibits 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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1616138
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Journal Issue: 8 Vol. 20; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Two-Dimensional NbS2 Gas Sensors for Selective and Reversible NO2 Detection at Room Temperature
An Impedance Humidity Sensor Based on CVD Grown WSe2 2D Films
Trace-Level, Multi-Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays
Journal Article
·
Wed Jul 24 00:00:00 EDT 2019
· ACS Sensors
·
OSTI ID:1558985
An Impedance Humidity Sensor Based on CVD Grown WSe2 2D Films
Journal Article
·
Thu Oct 17 00:00:00 EDT 2024
· ACS Applied Electronic Materials
·
OSTI ID:2588261
Trace-Level, Multi-Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays
Journal Article
·
Mon Apr 13 00:00:00 EDT 2020
· Advanced Materials
·
OSTI ID:1639006