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Join RADICAL PhD researcher Sayantan Ghosh (HZDR) as he presents his #RSCPoster on building a JNT-based electronic sensor to detect atmospheric radicals.

#RSCPoster is a global Twitter poster conference, held entirely online over the course of 24 hours. The event brings together the global chemistry community to network with colleagues across the world and at every career stage, share their research and engage in scientific debate.

This year, #RSCPoster takes place between 12:00 UTC 1 March and 12:00 UTC 2 March 2022 on Twitter.

Sayantan Ghosh’s poster for #RSCPoster 2022. #RSCMat #RSCNano #RSCEnv

An electronic sensor for atmospheric radicals from silicon junctionless nanowire transistors

Air quality and climate change are among the biggest societal challenges that we face today.
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.

Detecting and understanding the behaviour of radical species in the atmosphere is therefore of paramount importance and hence a major research goal in atmospheric science. Current techniques for measuring radicals are based on spectroscopic and mass spectrometric methods, which although sensitive and robust, are technically complex, cumbersome, and expensive.

The central aim of this project is to develop organic surfaces on confined 1D interfaces to fabricate radical sensors on a Silicon junctionless nanowire transistor (Si JNT) platform. Silicon junctionless nanowire transistors (JNTs) have recently detected record low concentrations (down to the zeptomolar range) of the protein streptavidin in liquid phase. However, JNTs have not yet been tested for sensing in gas phase.

Follow us online through Sayantan’s Twitter handle: @SGhosh_21.

Download a high-res version of Sayantan’s poster on our RADICAL data repository.

Follow our progress with RADICAL