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Issue 9, 2012
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Dissociative electron attachment to Pt(PF3)4—a precursor for Focused Electron Beam Induced Processing (FEBIP)

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Abstract

Experimental absolute cross sections for dissociative electron attachment (DEA) to Pt(PF3)4 are presented. Fragment anions resulting from the loss of one, two, three and four PF3 ligands as well as the Pt(PF3)F and the F ions were observed. The parent anion Pt(PF3)4 is too short-lived to be detected. The dominant process is loss of one ligand, with a very large cross section of 20 000 pm2; the other processes are about 200× weaker, with cross sections around 100 pm2, the naked Pt anion is formed with a cross section of only 1.8 pm2. The resonances responsible for the DEA bands were assigned based on comparison with electron energy-loss spectra and spectra of vibrational excitation by electron impact. Bands around 0.5 eV and 2 eV were assigned to shape resonances with single occupation of virtual orbitals. A DEA band at 5.9 eV was assigned to a core-excited resonance corresponding to an electron very weakly bound to the lowest excited state. An F band at 12.1 eV is assigned to a core excited resonance with a vacancy in an orbital corresponding to the 2nd ionization energy of the PF3 ligand. Implications of these findings for FEBIP are discussed.

Graphical abstract: Dissociative electron attachment to Pt(PF3)4—a precursor for Focused Electron Beam Induced Processing (FEBIP)

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Publication details

The article was received on 17 Oct 2011, accepted on 07 Dec 2011 and first published on 09 Dec 2011


Article type: Communication
DOI: 10.1039/C2CP23268E
Citation: Phys. Chem. Chem. Phys., 2012,14, 2979-2982
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    Dissociative electron attachment to Pt(PF3)4—a precursor for Focused Electron Beam Induced Processing (FEBIP)

    O. May, D. Kubala and M. Allan, Phys. Chem. Chem. Phys., 2012, 14, 2979
    DOI: 10.1039/C2CP23268E

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