An Investigation Into the Effects of Ozone on a Nanoplasmonic Gas Sensor
Typ
Examensarbete för masterexamen
Program
Applied physics (MPAPP), MSc
Publicerad
2020
Författare
Pierce, Damien
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Gas sensing is critical to the continued good health and well-being of humankind.
The sensing of NO2 and O3 are of particular importance, due to their negative
effects on the respiratory system. Nanoplasmonic sensing is a relatively unexplored
method that shows significant potential in gas detection. The nanoplasmonic sensor
in this study has already been successful in detecting NO2. However, its behaviour
when exposed to O3 has yet to be investigated. Using an experimental approach,
it was found that the optimum temperature for O3 sensing was 300°C, and 200°C
for NO2 sensing. The detection of 1 ppm NO2 was possible with a constant 20 ppb
O3 background, for 2 hour long exposure times. The sensor response to O3 showed
rapid kinetics, with peak shifts of up to 2 nm, compared to 0.4 nm for NO2, at the
same concentration of 100 ppb. This thesis presents a starting point for a further
study of nanoplasmonic sensor behaviour in the presence of these two harmful gases.
Beskrivning
Ämne/nyckelord
Nanoplasmonics , Ozone , Nanotechnology , Sensing