Paul Grey

Advanced Functional Materials for Micro and Nanotechnologies
Open Space (CEMOP) 13754
6 11621


Paul Grey received his Master’s degree in micro- and nanotechnology in September 2014 with an outstanding work on “Development of WO3 Electrochromic Thin-Film Transistors (ECTFTs) on Flexible Substrate”. He proceeded to work as a scholarship researcher at CENIMAT/I3N on the project A3Ple with the fabrication of printed electrochromic displays on paper substrates for applications such as packaging. The participation with the A3Ple project in “OE-A Competition for Multifunctional Demonstrators based on Organic and Printed Electronics” by submitting the demonstrator “Gas Detecting Safety Label A5/A0” was internationally awarded with “Best Publicly Funded Project Demonstrator”. In 2021 Paul finished his PhD in the field of research based on chiral nematic phase formation of cellulose nanocrystals (CNCs) and its application in photonics and optoelectronic devices. His main research during this time was based on the combination of inorganic semiconductors with photonic films from CNCs.  Main scientific interests: - Electrolyte Gated Transistors - Cellulose-based nanocomposites - Oxide nanoparticles (WO3, ZnO); - Electrochromic materials - Screen-printing - Paper-based electronic devices - Chiral Cellulose Nanocrystals.

Main publications

1. D. Gaspar, S.N. Fernandes, Susete; A. Grüninger de Oliveira, J. Fernandes, P. Grey, R. Pontes, L. Pereira, R. Martins, Rodrigo; M.H. Godinho, E. Fortunato, “Nanocrystalline Cellulose Applied Simultaneously as Gate Dielectric and Substrate on Flexible Field Effect Transistors”, Nanotechnology, 2014, 25, 094008. With Cover image. 

2. P. Barquinha, S. Pereira, L. Pereira, P. Wojcik, P. Grey, R. Martins and E. Fortunato, “Flexible and Transparent WO3 Transistor with Electrical and Optical Modulation”, Adv. Electron. Mater., 2015, 1: 1500030. 

3. P. Grey, L. Pereira, S. Pereira, P. Barquinha, I. Cunha, R. Martins, E. Fortunato, “Tungsten Oxide Electrochemical Transistors with Electrical and Optical Modulation”, Book Title: Technological Innovation for Cyber-Physical Systems, Vol. 470 of the series IFIP AICT, pp 542-550, 2015. 

4. P. Grey, L. Pereira, S. Pereira, P. Barquinha, I. Cunha, R. Martins and E. Fortunato, "Solid State Electrochemical WO3 Transistors with High Current Modulation.", Adv. Electron. Mater., 2016, 2: 1500414. With cover image. 

5. I. Cunha, R. Barras, P. Grey, D. Gaspar, E. Fortunato, R. Martins and L. Pereira, “Reusable Cellulose-Based Hydrogel Sticker Film Applied as Gate Dielectric in Paper Electrolyte-Gated Transistors”, Adv. Funct. Mater. 2017, 27, 1606755. 

6. P. Grey, D. Gaspar, I. Cunha, R. Barras, J. T. Carvalho, J. R. Ribas, E. Fortunato, R. Martins and L. Pereira, “Handwritten Oxide Electronics on Paper”, Adv. Mater. Technol. 2017, 1700009. 

7. Carvalho, J.T., Dubceac, V., Grey, P., Cunha, I., Fortunato, E., Martins, R., Clausner, A., Zschech, E., Pereira, L. “Fully printed zinc oxide electrolyte-gated transistors on paper” Nanomaterials. 2019, 9, 169. 

8. P. Grey, S.N. Fernandes, D. Gaspar, E. Fortunato, R. Martins, M.H. Godinho and L. Pereira, “Field-Effect Transistors on Photonic Cellulose Nanocrystal Solid Electrolyte for Circular Polarized Light Sensing” Adv. Funct. Mater. 2019, 29, 1805279. With Cover image. 

9. P. Grey, S.N Fernandes, D. Gaspar, J. Deuermeier, R. Martins, E. Fortunato, M.H. Godinho and L. Pereira, “Ionically Modified Cellulose Nanocrystal Self-Assembled Films with a Mesoporous Twisted Superstructure: Polarizability and Application in Ion-Gated Transistors” ACS Appl. Electron. Mater. 2019, 2671–2681. With Cover image. 

10. P. Grey, M. Chapa, M. Alexandre, T. Mateus, E. Fortunato, R. Martins, M. J. Mendes, L. Pereira, “Combining Soft with Hard Condensed Matter for Circular Polarized Light Sensing and Logic Operations” Adv. Opt. Mater. 2021, 9, 2001731. 

11. S. Nandy, S. Goswami, A. Marques, D. Gaspar, P. Grey, I. Cunha, D. Nunes, A. Pimentel, R. Igreja, P. Barquinha, L. Pereira, E. Fortunato, R. Martins, “Cellulose: A Contribution for the Zero e-Waste Challenge” Adv. Mater. Technol. 2021, 2000994.