RADICAL sensor diagram, showing a functionalised nanowire transistor, tuned to capture atmospheric radicals. Credit: RADICAL project


RADICAL is committed to Open Access research and is taking part in a European Commission pilot on  Open Access to Research Data

All publications from the RADICAL project are freely accessible and published as open access articles at either gold or green standard.

Our research publications and data are stored in an open-access  data repository on Zenodo to enable future researchers to access, exploit, reproduce and disseminate our data. This repository is validated as Open Access by OpenAIRE, with an associated   OpenAIRE project page.


A 3D model of silicon three gate nanowire junctionless transistor is developed in COMSOL Multiphysics. It is based on Gummel approach with Green’s functions. The model describes output I-V characteristics. Modeling results are verified against reference experimental data with average accuracy of 11%. Simulation of gate materials with different work functions that are used in practice is performed. The charge distribution along the nanowire depending on gate length is also studied.

This paper is a   conference proceedings from the MIEL conference that took place in Niš, Serbia between 12-14 September 2021. 

Citation: R. Rusev et al., “COMSOL Model of a Three-Gate Junctionless Transistor,” 2021 IEEE 32nd International Conference on Microelectronics (MIEL), 2021, pp. 93-96, doi: 10.1109/MIEL52794.2021.9569053.

Channel length influence on the nanowire parameters and characteristics at different gate voltages for applications in junctionless transistors (JLTs) are analyzed. The density-gradient effective mass tensor of the charge carriers is studied. The results obtained are used to indicate a compromise between performance and minimum dimensions for JLT sensor applications.

This paper is a   conference proceedings from the Mixed Design of Integrated Circuits and Systems (MIXDES) conference that took place in Łódź, Poland between 24-26 June 2021. 

Citation: R. Rusev et al., “Study of Nanowire Characteristics of a Junctionless Transistor Depending on the Gate Length,” 2021 28th International Conference on Mixed Design of Integrated Circuits and System, 2021, pp. 184-187, doi: 10.23919/MIXDES52406.2021.9497541.


A selection of materials and atmospheric chemistry research which has shaped our project proposal:

  • Role of atmospheric radicals on air quality and climate:
  • Silicon nanowires as sensors in liquid and gas environments:
  • Junctionless Nanowire Transistors (JNTs):
  • First attempts at detecting atmospheric radicals with silicon JNTs:
  • Role of radicals in atmospheric weathering:
  • Electronic noses to detect volatile organic compounds and biological components: 

Follow our progress with RADICAL