Published July 14, 2022 | Version v1
Poster Open

Poster on 'Electrical detection of atmospheric radicals using silicon nanowire junctionless transistors' for #EnvChem2022 and iCACGP/IGAC 2022


Air quality and climate change are among the biggest societal challenges that we face today.
According to World Health Organization, air pollution is the single greatest environmental risk.
An estimated 7 million people globally die prematurely each year due to air pollution. The
estimated economic costs of air pollution in the Europe are well over €20 billion a year.
Atmospheric free radicals, particularly hydroxyl (OH) and nitrate (NO3), are the drivers of
chemical processes that determine atmospheric composition and thus influence local and
global air quality and climate.

Therefore, detecting and understanding the behaviour of radical species in the atmosphere is
important. Detection of radicals is challenging because of their low mixing ratios, short lifetimes
and fast surface losses during sampling. Current techniques for measuring radicals, which are
based on spectroscopic and mass spectrometric methods, are technically complex,
cumbersome and expensive. As a result, the measurement of atmospheric radicals is far from
routine and only a few research groups worldwide can perform them in a very limited number
of geographic locations. This presentation will provide an overview, and a discussion of the
latest results, from the recently funded EU project ‘RADICAL’ which aims to develop small,
low-cost sensors to electrically detect short-lived atmospheric radicals. Although challenging,
RADICAL sensors not only have the potential to be rolled out on a global scale but can also
be adapted to detect other important atmospheric gases.


Additional Information: 

Vaishali Vardhan and Subhajit Biswas presented this poster for the Royal Society of Chemistry #EnvChem 2022 conference.

Adrien Gandolfo presented this poster for the iCACGP/IGAC joint International Atmospheric Chemistry Conference 2022.

RADICAL represents a 'Fundamental Breakthrough in Detection of Atmospheric Free Radicals'.

Find out more on the RADICAL project website:

The RADICAL project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement number 899282.



Files (3.4 MB)

Name Size Download all
3.4 MB Preview Download

Additional details


RADICAL – Fundamental Breakthrough in Detection of Atmospheric Free Radicals 899282
European Commission