Fig. 4: Mechanism of broad-spectrum C-2DEG Gas Sensor.
From: A broad-spectrum gas sensor based on correlated two-dimensional electron gas
a Schematic diagram of depletion of interface carriers due to charging of gas ice layer. The molecular structures of solid oxygen (left) and ice (right) are shown in the gas ice layer. The experimentally observed change in carrier concentration n b after activation at 50 K (blue curve) resulted in the change of the slope of the electrical transport curve c. Source data are provided as a Source Data file.
