Sammendrag
The increase in levels of air-pollutants due to growing urbanization and industrialization worldwide poses
a major risk for human health as well as having bad effects on the global environment such as acid
rains, photochemical smog, ozone layer deterioration and global warming. Exposure to hazardous
gaseous pollutants such as NOx, even in small concentrations can have a significant detrimental effect
on the health of human beings [1]-[3].
Two-dimensional (2D) materials have emerged as very promising class of materials which have been
used to develop ultrahigh sensitivity and low-power-consumption gas sensors due to their unmatched
surface area per unit volume, high surface activities and high mobility of charge transport [4]. 2D
heterostructures have been used to demonstrate novel physics and improved device performance,
specifically in the case where hBN has been used as a substrate because of its atomically flat surface
[5]. In this presentation, we demonstrate ultra-sensitive MoS2/hBN heterostructure devices for NOx
detection.
MoS2/hBN devices were fabricated by dry transfer techniques in addition to devices of MoS2 directly
on SiO2 both with varying thicknesses of MoS2.
The NOx detection performance of devices of varying MoS2 thickness both on hBN and SiO2 will be
presented.
[1] Kampa et al., Environmental Pollution, 151, 362 (2008)
[2] Kumar et al., Atmospheric Environment 122, 657(2015)
[3] Gulia et al., Atmospheric Pollution Research 6 (2), 286 (2015)
[4] Li et al, Small, 8, 63 (2012)
[5] Cao et al, Nature, 556, 43 (2018)
Vis fullstendig beskrivelse