Detection of volatile organic compounds based on low-energy electron scattering according to difference in collisional cross-section

Synergistic Effect of Electron Scattering and Space Charge Transfer Enabled Unprecedented Room Temperature NO2 Sensing Response of SnO2

“…With the rapid development of materials science and nanotechnology, some means to enhance gas sensing performance based on new sensing mechanisms have been proposed and attracted attention in the field of gas sensors, such as interlayer swelling [12] and electron scattering. [13] Among them, interlayer swelling only occurs when exposed to high concentration gases, [14] while electron scattering is expected to achieve the detection of low concentration gases. [15] Once the mean free path of the carriers is equivalent to the size of the grain, the surface-adsorbed molecules will act as diffusive scattering centers to suppress the conduction of free charge carriers.…”