João Ameixa
favinha.ameixa@marinha.pt
Research Areas
I am an Assistant Professor at the Portuguese Naval Academy (Escola Naval, Instituto Militar Universitário) and an integrated member of CINAV and CEFITEC. I hold an MSc in Biomedical Engineering and a PhD in Physics (2020), and I have international research experience in Austria, Germany, the USA, Sweden, and Denmark.
My research focuses on low-energy electron interactions with molecules, particularly dissociative electron attachment (DEA) processes relevant to radiation damage, radiosensitization, astrochemistry, and nanotechnology. I have published in leading international journals including Nature Communications, Angewandte Chemie, Accounts of Chemical Research, Journal of Chemical Physics, and ACS journals, and my work has been recognized through invited talks, cover articles, and early-career awards. I have also served as Guest Editor of a Topical Issue of the European Physical Journal D.
From 2021 to 2024, I conducted postdoctoral research at the University of Potsdam, where I participated in an ERC-funded project and consolidated my scientific independence in electron-driven molecular processes. During this period, I contributed to the supervision of MSc and BSc students and coordinated the Integrated Research Training Group (IRTG) of the Collaborative Research Center 1636 (2024).
At the Portuguese Naval Academy, I currently connect defense-oriented education with research and technological development, teaching applied physics and engineering topics related to radiation propagation, microwaves, antennas, and optoelectronics. I have also taken on leadership roles in coordination and technology transfer, notably as Scientific Coordinator of the innoFSPEC Transfer Lab, and contributed to the organization of the 4th DEA Club Meeting (Potsdam, 2024).
Main publications
Ameixa, J.; Arthur-Baidoo, E.; Pereira-da-Silva, J.; Ruivo, J. C.; Varella, M. T. do N.; Beyer, M. K.; Ončák, M.; Ferreira da Silva, F.; Denifl, S. Formation of temporary negative ions and their subsequent fragmentation upon electron attachment to CoQ0 and CoQ0H2. Chem. Phys. Chem. (2022). https://doi.org/10.1002/cphc.202100834 Front Cover
Ziegler, P.; Pelc, A.; Arthur-Baidoo, E.; Ameixa, J.; Ončák, M.; Denifl, S. Negative ion formation and fragmentation upon dissociative electron attachment to the nicotinamide molecule. RSC Adv. 11, 32425–32434 (2021). https://doi.org/10.1039/D1RA06083J
Gatchell, M.; Ameixa, J.; Ji, M.; Stockett, M. H.; Simonsson, A.; Denifl, S.; Cederquist, H.; Schmidt, H. T.; Zettergren, H. Survival of PAH knockout fragments in the interstellar medium. Nat. Commun. 121, 2021, 12, 1–8 (2021). https://doi.org/10.1038/s41467-021-26899-0
Arthur‐Baidoo, E.; Ameixa, J.; Ončák, M.; Denifl, S. Ring‐selective fragmentation in the tirapazamine molecule upon low‐energy electron attachment. Int. J. Mol. Sci. 22, 3159 (2021). https://doi.org/10.3390/ijms22063159
Arthur-Baidoo, E., Ameixa, J., Ziegler, P., Ferreira da Silva, F., Oncak, M., & Denifl, S. Reactions in Tirapazamine Induced by the Attachment of Low-Energy Electrons: Dissociation Versus Roaming of OH. Angew. Chemie-Int. Ed., 59 17177-17181 (2020). https://doi.org/10.1002/anie.202006675 Hot Paper
Pereira-da-Silva, J.; Rodrigues, R.; Ramos, J.; Brigído, C.; Botnari, A.; Silvestre, M.; Ameixa, J.; Mendes, M.; Zappa, F.; Mullock, S. J.; Araújo, J. M. M.; Varella, M. T. do N.; Cornetta, L. M.; Ferreira da Silva, F. Electron driven reactions in tetrafluoroethane: positive and negative ions formation. J. Am. Soc. Mass Spectrom., 32, 6, 1459–1468 (2021). https://doi.org/10.1021/jasms.1c00057
Tiefenthaler, L., Ameixa, J., Martini, P., Albertini, S., Ballauf, L., Zankl, M., Goulart, M., Laimer, F., Haeften, K. von, Zappa, F., and Scheier, P. An intense source for cold cluster ions of a specific composition. Review of Scientific Instruments 91, 033315 (2020). https://doi.org/10.1063/1.5133112
More information in:
ORCID ID: 0000-0001-8648-9924
Scopus Author ID: 57188573251
Publons ID: 5301475
