Publications de Marco Sacchi | EPFL Graph Search

Mode-specific reactivity of CH4 on Pt(110)-(1×2): The concerted role of stretch and bend excitation

The state-resolved reaction probability of CH4 on Pt(110)-(1×2) was measured as a function of CH4 translational energy for four vibrational eigenstates comprising different amounts of C-H stretch and bend excitation. State-specific reactivity is observed b ...

American Physical Society2010

State-resolved reactivity of CH4 on Pt(110)-(1 x 2): The role of surface orientation and impact site

Rainer Beck, Marco Sacchi, Régis Bisson

The reactivity of methane (CH4) on Pt(110)-(1×2) has been studied by quantum state-resolved surface reactivity measurements. Ground state reaction probabilities, S0(v=0) ~ S0(laser-off), as well as state-resolved reaction probabilities S0(2v3), for CH4 exc ...

2010

The effect of molecular vibrations and surface structure on the chemisorption of methane on platinum

Marco Sacchi

In this thesis, I report state-resolved measurements of the chemisorption probability of CH4 on Pt(111) and Pt(110)-(1×2) for several rovibrationally excited states (2ν3, ν1+ν4, and 2ν2+ν4) in addition to the ground state. Measurements of the state resolve ...

EPFL2008

Vibrational Activation in Direct and Precursor-Mediated Chemisorption of SiH4 on Si(100)

Rainer Beck, Thanh Tung Dang, Marco Sacchi, Régis Bisson

The quantum state-resolved reactivity S0 of SiH4 on Si(100)-2x1 has been measured for the first time for two vibrationally excited Si-H stretch local mode states (|2000> and |1100>) as well the ground state S0 as a function of translational energy En and s ...

2008

Cavity ring-down spectroscopy of jet-cooled silane isotopologues in the Si-H stretch overtone region

Rainer Beck, Thanh Tung Dang, Marco Sacchi, Régis Bisson

Absorption spectra of silane in the region of the first overtone of the Si-H stretch vibration have been recorded in a seeded supersonic jet expansion by cavity ring-down spectroscopy as well as in a static gas cell at room temperature by photoacoustic spe ...

2007

State-Resolved Reactivity of CH4(2ν3) on Pt(111) and Ni(111): Effects of Barrier Height and Transition State Location

Rainer Beck, Plinio Maroni, Thanh Tung Dang, Marco Sacchi, Régis Bisson, Bruce Yoder

Quantum state-resolved sticking coefficients on Pt(111) and Ni(111) surfaces have been measured for CH4 excited to the first overtone of the antisymmetric C-H stretch (2ν3) at well defined kinetic energies in the range of 10-90 kJ/mol. The ground state rea ...

2007

State-resolved gas-surface reactivity of methane in the symmetric C-H stretch vibration on Ni(100)

Thomas Rizzo, Rainer Beck, Plinio Maroni, Thanh Tung Dang, Marco Sacchi

The state-resolved reactivity of CH4 in its totally symmetric C-H stretch vibration (nu(1)) has been measured on a Ni(100) surface. Methane molecules were accelerated to kinetic energies of 49 and 63.5 kJ/mol in a molecular beam and vibrationally excited t ...

2005