TY - JOUR
T1 - A broad-spectrum gas sensor based on correlated two-dimensional electron gas
AU - Hong, Yuhao
AU - Wei, Long
AU - Zhang, Qinghua
AU - Deng, Zhixiong
AU - Liao, Xiaxia
AU - Zhou, Yangbo
AU - Wang, Lei
AU - Li, Tongrui
AU - Liu, Junhua
AU - Xiao, Wen
AU - Hu, Shilin
AU - Wang, Lingfei
AU - Li, Lin
AU - Huijben, Mark
AU - Gan, Yulin
AU - Chen, Kai
AU - Koster, Gertjan
AU - Rijnders, Guus
AU - Liao, Zhaoliang
N1 - Publisher Copyright:
© 2023, The Author(s).
PY - 2023/12/21
Y1 - 2023/12/21
N2 - Designing a broad-spectrum gas sensor capable of identifying gas components in complex environments, such as mixed atmospheres or extreme temperatures, is a significant concern for various technologies, including energy, geological science, and planetary exploration. The main challenge lies in finding materials that exhibit high chemical stability and wide working temperature range. Materials that amplify signals through non-chemical methods could open up new sensing avenues. Here, we present the discovery of a broad-spectrum gas sensor utilizing correlated two-dimensional electron gas at a delta-doped LaAlO3/SrTiO3 interface with LaFeO3. Our study reveals that a back-gating on this two-dimensional electron gas can induce a non-volatile metal to insulator transition, which consequently can activate the two-dimensional electron gas to sensitively and quantitatively probe very broad gas species, no matter whether they are polar, non-polar, or inert gases. Different gas species cause resistance change at their sublimation or boiling temperature and a well-defined phase transition angle can quantitatively determine their partial pressures. Such unique correlated two-dimensional electron gas sensor is not affected by gas mixtures and maintains a wide operating temperature range. Furthermore, its readout is a simple measurement of electric resistance change, thus providing a very low-cost and high-efficient broad-spectrum sensing technique.
AB - Designing a broad-spectrum gas sensor capable of identifying gas components in complex environments, such as mixed atmospheres or extreme temperatures, is a significant concern for various technologies, including energy, geological science, and planetary exploration. The main challenge lies in finding materials that exhibit high chemical stability and wide working temperature range. Materials that amplify signals through non-chemical methods could open up new sensing avenues. Here, we present the discovery of a broad-spectrum gas sensor utilizing correlated two-dimensional electron gas at a delta-doped LaAlO3/SrTiO3 interface with LaFeO3. Our study reveals that a back-gating on this two-dimensional electron gas can induce a non-volatile metal to insulator transition, which consequently can activate the two-dimensional electron gas to sensitively and quantitatively probe very broad gas species, no matter whether they are polar, non-polar, or inert gases. Different gas species cause resistance change at their sublimation or boiling temperature and a well-defined phase transition angle can quantitatively determine their partial pressures. Such unique correlated two-dimensional electron gas sensor is not affected by gas mixtures and maintains a wide operating temperature range. Furthermore, its readout is a simple measurement of electric resistance change, thus providing a very low-cost and high-efficient broad-spectrum sensing technique.
UR - http://www.scopus.com/inward/record.url?scp=85180218756&partnerID=8YFLogxK
U2 - 10.1038/s41467-023-44331-7
DO - 10.1038/s41467-023-44331-7
M3 - Article
C2 - 38129430
AN - SCOPUS:85180218756
SN - 2041-1723
VL - 14
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 8496
ER -