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NOx detection by MoS2/hBN heterostructures

NOx detection by MoS2/hBN heterostructures

Kategori
Konferansebidrag og faglig presentasjon
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)
Oppdragsgiver
  • Norges forskningsråd / 245963/F50
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • SINTEF Digital / Microsystems and Nanotechnology
  • SINTEF Industri / Bærekraftig energiteknologi
  • SINTEF Digital / Smart Sensor Systems
Presentert på
Graphene Week 2019
Sted
Helsinki
Dato
22.09.2019 - 26.09.2019
År
2019