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The use of interdigitated microelectrode structures for the detection of exposure to simulated airborne environmental dust

Townsend, RL, Dorey, RA, Rocks, SA and Tearle, S (2014) The use of interdigitated microelectrode structures for the detection of exposure to simulated airborne environmental dust Technical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014, 2. pp. 57-60.

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Abstract

Particulate matter is ubiquitous in the environment, however industrial processes have increased the amount released into the air. Here, the authors demonstrate the initial development of a novel sensor capable of detecting airborne particulate matter in real time. Interdigitated microelectrodes (IDT) were printed on a silicon wafer substrate and exposed to Arizona Road Dust in a wind tunnel for periods of 2, 5, and 10 minutes with an air sample mass loading of 9.07mg/m3 at a velocity of 1.7m/s. Impedance measurements were taken every 30 seconds during exposure. The average loading efficiency was calculated to be 31%. Impedance measurements were recorded from the IDT samples showing that the impedance decreased in real time over the 10 minute exposure. The observed capturing coefficient was possibly due to surface-particle interaction phenomena, such as particle bounce, impaction and re-entrainment. IDTs have previously been used to detect nanoparticles within aqueous environments however this is the first report of such electrodes being used to successfully detect airborne particles.

Item Type: Article
Authors :
NameEmailORCID
Townsend, RLUNSPECIFIEDUNSPECIFIED
Dorey, RAr.dorey@surrey.ac.ukUNSPECIFIED
Rocks, SAUNSPECIFIEDUNSPECIFIED
Tearle, SUNSPECIFIEDUNSPECIFIED
Date : 1 January 2014
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:28
Last Modified : 17 May 2017 15:11
URI: http://epubs.surrey.ac.uk/id/eprint/839321

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