Extraordinary Performance of Semiconducting Metal Oxide Gas Sensors Using Dielectric Excitation

Details

• Personal Author:
  Alkadi N ; Amm B ; Calvert C ; Collazo-Davila C ; Forman D ; Go S ; Kolmakov A ; Li X ; Mack C ; McConnell P ; Nayeri M ; Potyrailo RA ; Scherer B ; Sexton D ; St-Pierre R ; Wu G
• Description:
  Semiconducting metal oxides are widely used for gas sensors. The resulting chemiresistor devices, however, suffer from non-linear responses, signal fluctuations and gas cross-sensitivities, which limits their use in demanding applications of air-quality monitoring. Here, we show that conventional semiconducting metal oxide materials can provide high-performance sensors using an impedance measurement technique. Our approach is based on dielectric excitation measurements and yields sensors with a linear gas response (R2 > 0.99), broad dynamic range of gas detection (six decades of concentrations) and high baseline stability, as well as reduced humidity and ambient-temperature effects. We validated the technique using a range of commercial sensing elements and a range of gases in both laboratory and field conditions. Our approach can be applied to both n- and p-type semiconducting metal oxide materials, and we show that it can be used in wireless sensor networks, and drone-based and wearable environmental and industrial gas monitoring. [Description provided by NIOSH]
• Subjects:
  Air Pollution Electrical Equipment And Supplies Occupational Health Safety Semiconductors
• Keywords:
  Air Quality Monitoring Electronic Equipment Emerging Technology Gas Detectors Metal Oxides Sensors Wearable Technologies
• ISSN:
  2520-1131
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Journal Article
• Place as Subject:
  Maryland ; New York ; Oklahoma ; OSHA Region 2 ; OSHA Region 3 ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  280-289
• Volume:
  3
• Issue:
  5
• NIOSHTIC Number:
  nn:20068387
• Citation:
  Nat Electron 2020 May; 3(5):280-289
• Contact Point Address:
  Radislav A. Potyrailo, GE Global Research, Niskayuna, NY, USA
• Email:
  potyrailo@ge.com
• Federal Fiscal Year:
  2020
• Performing Organization:
  General Electric Company
• Peer Reviewed:
  True
• Start Date:
  20150817
• Source Full Name:
  Nature Electronics
• End Date:
  20171017
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:4de1af5fcc2aad6ce1f259df96b66ba1168e5e25760c2cb226ba015c0b9e2e9a2018bc4a24c3a3105dac2ae032e66ffc8c71984cad5fed51a4a222e4e23bbbaf
• Download URL:
  https://stacks.cdc.gov/view/cdc/230547/cdc_230547_DS1.pdf
• File Type:
  [PDF - 3.21 MB ]