Filipe Ferreira da Silva

Research Areas

Over the last years I have been deeply involved in low energy electron (LEE) interactions leading to negative ion formation via dissociative electron attachment (DEA) or electron ionisation (EI), electron scattering processes from isolated molecules, electron transfer in neutral potassium collisions with gas phase isolated targets and VUV spectroscopy studies. DEA and EI studies have been carried out in close collaboration with the universities of Innsbruck, Siedlce and Iceland. From these collaborations it is worth stressing the protective power of water molecules to pyrimidine units proven by DEA studies. Understanding the radio effectiveness of 3-Brpyruvic acid has been described by means of DEA complemented with photoabsorption excitation studies. The effects of LEE interactions with platinum compounds have been studied in collaboration with the University of Iceland together with the University of Florida, US. In these studies, possible FEBID precursors such as Pt(CO)2Cl2 and Pt(CO)2Br2 have been investigated. The DEA and EI results show how the bond energy of Pt-halogen can dictate the formation of bare platinum anion. These findings are very important for pure metal deposition in nanotechnology. A crossed beam apparatus is under development. This set-up consists of a trochoidal electron monochromator with electron energy resolution of about 100meV coupled with a reflectron time-of-flight mass spectrometer. The set-up is almost fully operational with the first results expected by the end of the year.

Main publications

Pereira-da-Silva, J.; Mendes, M.; Nunes, A.; Araújo, J.; Cornetta, L. M.; Ferreira da Silva, F. Triphenylboroxine stability under low-energy electron interactions. Phys. Chem. Chem. Phys. 24, 10025-10032 (2022). https://doi.org/10.1039/D2CP00855F

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

Ferreira da Silva, F., Thorman, R. M., Bjornsson, R., Lu, H., McElwee-White, L., & Ingólfsson, O. Dissociation of the FEBID precursor cis-Pt(CO)(2)Cl-2 driven by low-energy electrons. Physical Chemistry Chemical Physics, 22, 6100-6108 (2020). https://doi.org/10.1039/c9cp06633k PCCP back cover

Ferreira da Silva, F.; Varella, M. T. do N.; Jones, N. C.; Hoffmann, S. V.; Denifl, S.;Bald, I.; Kopyra, J. Electron-induced reactions in 3-bromo-pyruvic acid. Chemistry - A European Journal 25, 5498-5506 (2019)
https://doi.org/10.1002/chem.201806132 Hot Paper

Neustetter, M.; Aysina, J.; Ferreira da Silva, F.; Denifl, S. The effect of solvation in electron attachment to pure and hydrated pyrimidine clusters. Angewandte Chem. Int. Ed, 54, 9124-9126 (2015). https://doi.org/10.1002/anie.201503733

Almeida, D.; Ferreira da Silva, F.; García, G.; Limão-Vieira, P. Selective bond cleavage in potassium collisions with pyrimidine bases of DNA. Phys. Rev. Lett. 110, 023201-1 – 023201-5 (2013).
https://doi.org/10.1103/PhysRevLett.110.023201

Ferreira da Silva, F.; Bartl, P.; Denifl, S.; Echt, O.; Maerk, T. D.; Scheier, P. Argon clusters embedded in helium nanodroplets. Phys. Chem. Chem. Phys., 42, 9791-9797 (2009). https://doi.org/10.1039/B913175B PCCP cover

More information in:

ORCID: 0000-0002-4406-4108

Scopus Author ID: 24477190300  

Websites

• Filipe Ferreira da Silva