Poster on 'Reactivity of atmospheric radicals with functionalised surfaces' for E-MRS 2023 Fall Meeting
- 1. University of York
- 2. National Technical University of Athens
Description
Currently, detecting radicals is complex, cumbersome and expensive. Only a few labs worldwide can detect radicals. RADICAL is developing a break-through way of detecting radicals with a small, low-cost electronic sensor that can be deployed globally. Self-assembled monolayers (SAMs) are going to be used to functionalise the sensor surface for enabling the detection of specific gas phase molecules.
Conclusions: Plasma mas been used to generate OH radicals at a reasonable concentration for reacting with monolayers on glass slides. A library of organic molecules have been exposed to OH radicals and their rates of decay have been monitored by contact angle analysis.
Most molecules gave a similar rate of decay upon exposure to OH radicals. Only the perfluoro alkane chains gave a slower rate of decay. This result has been supported by the DFT calculations. Pyrenemethylamine has been used as a fluorescent probe and has shown the presence of carbonyl group after alkane chains have been exposed to plasma.
The fluorescence technique will be used to quantify the oxygen-containing functional groups after exposure to plasma and will be used to complement the kinetics study with contact angle analysis.
Notes
Files
poster_Warsaw_final_sept23.pdf
Files
(2.9 MB)
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