Publications by Michel Rossi | EPFL Graph Search

Characterization of Biobased Polymers at the Gas-Solid Interface─Analysis of Surface and Bulk Properties during Artificial Degradation

Michel Rossi, Jeremy Luterbacher, Christian Ludwig, Tobias Borgmeyer

Accurately assessing the interfacial composition and reactivity of (bio)polymers under controlled but environmentally relevant conditions remains challenging. This study explores the evolution of surface functionalities of novel polyesters Poly(Butylene Xy ...

2025

Time-resolved, physics-informed neural networks for tokamak total emission reconstruction and modelling

Michel Rossi, Alessandro Pau

Diagnostics play a pivotal role in nuclear fusion experimental reactors, supporting physical studies, modelling, and plasma control. However, most diagnostics provide limited and partial information about the plasma's status. For instance, magnetic probes ...

IOP Publishing Ltd2025

Unraveling the Uptake of Glyoxal on a Diversity of Natural Dusts and Surrogates: Linking Dust Composition to Glyoxal Uptake and Estimation of Atmospheric Lifetimes

Michel Rossi, Hui Chen

The uptake of glyoxal (Gly) on 28 different samples with varying mineralogical origins, such as clays, mineral proxies, and natural dusts from the major arid regions of the Earth, was determined. Experiments were performed at ambient temperature inside a K ...

Amer Chemical Soc2024

Natural and simulated weathering of polystyrene: A molecular view of the polymeric interface

Michel Rossi, Florian Frédéric Vincent Breider, Christian Ludwig, Tobias Borgmeyer, Lu Zhou

This work presents the changing abundance of surface functional groups (SFGs) on polystyrene (PS) upon weathering within one or a few molecular monolayers from a molecular point of view. PS particles were aged by exposing it to a gas flow of typically (5 % ...

Elsevier BV2024

Flowing Gas Experiments Reveal Mechanistic Details of Interfacial Reactions on a Molecular Level at Knudsen Flow Conditions

Michel Rossi, Christian Ludwig, Riccardo Iannarelli

Knudsen flow experiments and its interpretation in terms of adsorption/desorption kinetics as well as quantitative uptake on substrates of interest is presented together with the description of critical design parameters of the Knudsen Flow Reactor (KFR). ...

2022

The Kinetics of Adsorption and Desorption of Selected Semivolatile Hydrocarbons and H2O Vapor on Two Mineral Dust Materials: A Molecular View

Michel Rossi, Christian Ludwig, Riccardo Iannarelli

A flowing gas experiment using a Knudsen flow reactor was performed on a series of seven semivolatile probe gases interacting with two often used mineral dust materials, namely, coarse Arizona test dust (ATD-C) and kaolinite. The semivolatile probe gases u ...

2022

Coexistence of reactive functional groups at the interface of a powdered activated amorphous carbon: a molecular view

Michel Rossi, Christian Ludwig, Riccardo Iannarelli

Titration experiments using ten reactive probe gases interacting with a Powdered Activated Carbon (PAC) sample have been performed in a two-chamber Knudsen flow reactor equipped with molecular-beam modulated mass spectrometric detection. The goal of these ...

Taylor & Francis2021

The influence of HCl on the evaporation rates of H2O over water ice in the range 188 to 210 K at small average concentrations

Michel Rossi, Christophe Eric Ludovic Delval

The evaporation flux J(ev)(H2O) of H2O from HCl-doped typically 1.5 mu m or so thick vapor-deposited ice films has been measured in a combined quartz crystal microbalance (QCMB)-residual gas mass spectrometry (MS) experiment. J(ev)(H2O) has been found to s ...

Copernicus GmbH2018

Transient mid-IR study of electron dynamics in TiO2 conduction band

Michel Rossi, Majed Chergui, Mercedes Hannelore Rittmann-Frank, Fabio Giacomo Santomauro

The dynamics of TiO2 conduction band electrons were followed with a novel broadband synchrotron-based transient mid-IR spectroscopy setup. The lifetime of conduction band electrons was found to be dependent on the injection method used. Direct band gap exc ...

Royal Society of Chemistry2013

The metastable HCl center dot 6H(2)O phase - IR spectroscopy, phase transitions and kinetic/thermodynamic properties in the range 170-205 K

Michel Rossi, Simone Chiesa

In this laboratory study a multidiagnostic experimental approach including Fourier transform infrared (FTIR) absorption of 1 to 2 mu m thick polycrystalline ice films, residual gas mass spectrometry (MS) and total pressure measurement were employed. Both a ...

Copernicus GmbH2013

Heterogeneous Chemistry of Cl2O and HOCl on Frozen Natural Sea Salt, Recrystallized Sea Salt, KCl and NaCl Solutions at 200 and 215 K

Michel Rossi, Pascal Pratte

The HOCl heterogeneous reaction on frozen natural (NSS) and recrystallized (RSS) sea salt KCl and NaCl solutions was studied using a low pressure flow reactor in order to measure the uptake coefficient gamma and products of reaction The HOCl sample used in ...

Oldenbourg Wissenschaftsverlag GmbH, De Gruyter2010

Adverse Effects of Industrial Multiwalled Carbon Nanotubes on Human Pulmonary Cells

Michel Rossi

The aim of this study was to evaluate adverse effects of multiwalled carbon nanotubes (MWCNT), produced for industrial purposes, on the human epithelial cell line A549. MWCNT were dispersed in dipalmitoyl lecithin (DPL), a component of pulmonary surfactant ...

2009

Characterization of surface functional groups present on laboratory-generated and ambient aerosol particles by means of heterogeneous titration reactions

Michel Rossi, Michel Guillemin

A Knudsen flow reactor has been used to quantify surface functional groups on aerosols collected in the field. This technique is based on a heterogeneous titration reaction between a probe gas and a specific functional group on the particle surface. In the ...

2009

Evaluated kinetic and photochemical data for atmospheric chemistry: Volume IV - gas phase reactions of organic halogen species

Michel Rossi

This article, the fourth in the series, presents kinetic and photochemical data sheets evaluated by the IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry. It covers the gas phase and photochemical reactions of organic halogen spec ...

Copernicus Publications2008

Thermochemical properties from ab initio calculations: pi- and sigma-free radicals of importance in soot formation: (C3H3)-C-center dot (propargyl), (C4H3)-C-center dot, (C13H9)-C-center dot (phenalenyl), (C6H5)-C-center dot (phenyl), (C10H7)-C-center dot (naphthyl), (C14H9)-C-center dot (anthryl), (C14H9)-C-center dot (phenanthryl), (C16H9)-C-center dot (pyrenyl), (C12H7)-C-center dot (acenaphthyl), and (C12H9)-C-center dot (biphenylyl)

Michel Rossi

The calculated difference in the standard heat of formation Delta Delta H-f degrees(298.15) of n- and i-C4H3 center dot free radicals is 37.9 kJ mol(-1) for G3MP2B3 and 45.0 kJ mol(-1) for CCSD(T)-CBS (W 1 U) calculations, which seems to preclude the direc ...

2008

The kinetics of H2O vapor condensation and evaporation on different types of ice in the range 130-210 K

Michel Rossi, Hubert van den Bergh, Pascal Pratte

The kinetics of condensation (kc) and the evaporation flux (J(ev)) of H2O on ice were studied in the range 130-210 K using pulsed-valve and steady-state techniques in a low-pressure flow reactor. The uptake coefficient gamma was measured for different type ...

American Chemical Society2006