# Detection of Gas Molecule using C$_3$N island Single Electron Transistor

## TL;DR

This paper introduces a novel C$_3$N island single electron transistor (SET) for gas detection, demonstrating its ability to identify specific molecules like CO$_2$ with high sensitivity at various temperatures.

## Contribution

First demonstration of a C$_3$N-based SET for molecular sensing, analyzing its electronic response to different gas molecules through first-principles calculations.

## Key findings

- C$_3$N effectively captures CO$_2$ molecules.
- Charge stability diagrams reveal distinct signatures for different molecules.
- The device can detect single molecules over a wide temperature range.

## Abstract

C$_3$N is a recently discovered 2D layered material structurally similar to graphene, which has demonstrated immense prospect for future nanoelectronics. In this work, we have designed and investigated the operation and performance of a C$_3$N island single electron transistor (SET) for the first time. Using First-principles based calculations, we investigated the effect of various molecular adsorptions on the electronic and conduction behaviour of the SET. C$_3$N was found to be the perfect host material for capturing CO$_2$. The charge stability diagram carries the signature of different molecules within the SET and their presence can be uniquely identified from various line scans and normalised differential conductance behaviour obtained from it. Our results suggests the usefulness of such nanoelectronic structures for sensing toxic gas molecules which can be operational over a wide temperature range with detection sensitivity upto a single molecular level.