H. M. Cuppen
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View article: Studying Pure CH<sub>4</sub> and the Interaction of CH<sub>4</sub> and H<sub>2</sub>O in Interstellar Ice Analogues with On-Resonance Infrared Irradiation
Studying Pure CH<sub>4</sub> and the Interaction of CH<sub>4</sub> and H<sub>2</sub>O in Interstellar Ice Analogues with On-Resonance Infrared Irradiation Open
Methane in the solid state is often studied in interaction with water, either as clathrate hydrates or as interstellar ice in a water-rich ice environment. Using free-electron laser infrared irradiation, we studied the interaction between …
View article: Infrared Irradiation of H<sub>2</sub>O:CO<sub>2</sub> Ice: A Combined Experimental and Computational Study of the Dissipation of CO<sub>2</sub> Vibrational Excitations
Infrared Irradiation of H<sub>2</sub>O:CO<sub>2</sub> Ice: A Combined Experimental and Computational Study of the Dissipation of CO<sub>2</sub> Vibrational Excitations Open
In interstellar ices, the ice matrix can have a great influence on the chemical reactions. The hydrogen-bonding network in pure water ices facilitates fast energy dissipation that, for example, stabilizes the HOCO complex, a crucial step i…
View article: Modelling methanol and hydride formation in the JWST Ice Age era
Modelling methanol and hydride formation in the JWST Ice Age era Open
Context. Recent JWST observations have measured the ice chemical composition towards two highly extinguished background stars, NIR38 and J110621, in the Chamaeleon I molecular cloud. The observed excess of extinction on the long-wavelength…
View article: Modelling methanol and hydride formation in the JWST Ice Age era
Modelling methanol and hydride formation in the JWST Ice Age era Open
(Abridged) JWST observations have measured the ice composition toward two highly-extinguished field stars in the Chamaeleon I cloud. The observed extinction excess on the long-wavelength side of the H2O ice band at 3 micron has been attrib…
View article: Molecular mobility of extraterrestrial ices: surface diffusion in astrochemistry and planetary science
Molecular mobility of extraterrestrial ices: surface diffusion in astrochemistry and planetary science Open
Surface and bulk diffusion of atoms and molecules drives molecule formation in space, but a lack of theoretical and laboratory diffusion studies under relevant physical conditions hampers our ability to unravel extraterrestrial chemistry.
View article: Identifying and controlling the order parameter for ultrafast photoinduced phase transitions in thermosalient materials
Identifying and controlling the order parameter for ultrafast photoinduced phase transitions in thermosalient materials Open
The drastic shape deformation that accompanies the structural phase transition in thermosalient materials offers great potential for their applications as actuators and sensors. The microscopic origin of this fascinating effect has so far …
View article: The effect of dilution on the energy dissipation in water interstellar ice analogues
The effect of dilution on the energy dissipation in water interstellar ice analogues Open
Context . Interstellar ices and their energetic processing play an important role in advancing the chemical complexity in space. Interstellar ices covering dust grains are intrinsically mixed, and it is assumed that physicochemical changes…
View article: Detection of the elusive dangling OH ice features at ~2.7 μm in Chamaeleon I with JWST NIRCam
Detection of the elusive dangling OH ice features at ~2.7 μm in Chamaeleon I with JWST NIRCam Open
View article: Laboratory and Computational Studies of Interstellar Ices
Laboratory and Computational Studies of Interstellar Ices Open
Ice mantles play a crucial role in shaping the astrochemical inventory of molecules during star and planet formation. Small-scale molecular processes have a profound impact on large-scale astronomical evolution. The areas of solid-state la…
View article: Digging into the friction reduction mechanism of organic friction modifiers on steel surfaces: Chains packing vs. molecule–metal interactions
Digging into the friction reduction mechanism of organic friction modifiers on steel surfaces: Chains packing vs. molecule–metal interactions Open
View article: Mechanism of Phase Transition in <scp>dl</scp>-Methionine: Determining Cooperative and Molecule-by-Molecule Transformations
Mechanism of Phase Transition in <span>dl</span>-Methionine: Determining Cooperative and Molecule-by-Molecule Transformations Open
The solid-state phase transition in dl-methionine has been extensively studied because of its atypical behavior. The transition occurs through changes in the molecular conformation and 3D packing of the molecules. Phase transitions in race…
View article: Resonant infrared irradiation of CO and CH<sub>3</sub>OH interstellar ices
Resonant infrared irradiation of CO and CH<sub>3</sub>OH interstellar ices Open
Context . Solid-phase photo-processes involving icy dust grains greatly affect the chemical evolution of the interstellar medium by leading to the formation of complex organic molecules and by inducing photodesorption. So far, the focus of…
View article: An Ice Age JWST inventory of dense molecular cloud ices
An Ice Age JWST inventory of dense molecular cloud ices Open
View article: An Ice Age JWST inventory of dense molecular cloud ices
An Ice Age JWST inventory of dense molecular cloud ices Open
This dataset is the first observational data release for the JWST Early Release Science Ice Age program (#1309). More information about this program can be found at our team website (http://jwst-iceage.org/) and the STScI website (https://…
View article: An Ice Age JWST inventory of dense molecular cloud ices
An Ice Age JWST inventory of dense molecular cloud ices Open
This dataset is the first observational data release for the JWST Early Release Science Ice Age program (#1309). More information about this program can be found at our team website (http://jwst-iceage.org/) and the STScI website (https://…
View article: Simulation of solid-state phase transition in<scp>dl</scp>-methionine
Simulation of solid-state phase transition in<span>dl</span>-methionine Open
dl -Methionine's solid-state phase transition involves conformational and packing changes, comparable to transitions in many materials. Obtaining thermodynamic properties during this transition helps to understand similar phase transitions.
View article: Energy Transfer and Restructuring in Amorphous Solid Water upon Consecutive Irradiation
Energy Transfer and Restructuring in Amorphous Solid Water upon Consecutive Irradiation Open
Interstellar and cometary ices play an important role in the formation of planetary systems around young stars. Their main constituent is amorphous solid water (ASW). Although ASW is widely studied, vibrational energy dissipation and struc…
View article: IRFEL Selective Irradiation of Amorphous Solid Water: from Dangling to Bulk Modes
IRFEL Selective Irradiation of Amorphous Solid Water: from Dangling to Bulk Modes Open
Amorphous solid water (ASW) is one of the most widely studied solid phase systems. A better understanding of the nature of inter- and intramolecular forces in ASW is, however, still required to correctly interpret the catalytic role of ASW…
View article: Thermal desorption of interstellar ices: a review on the controlling parameters and their implications from snowlines to chemical complexity
Thermal desorption of interstellar ices: a review on the controlling parameters and their implications from snowlines to chemical complexity Open
The evolution of star-forming regions and their thermal balance are strongly influenced by their chemical composition, which, in turn, is determined by the physicochemical processes that govern the transition between the gas phase and the …
View article: Infrared free-electron laser irradiation of carbon dioxide ice
Infrared free-electron laser irradiation of carbon dioxide ice Open
View article: Thermal desorption of interstellar ices. A review on the controlling parameters and their implications fromsnowlines to chemical complexity
Thermal desorption of interstellar ices. A review on the controlling parameters and their implications fromsnowlines to chemical complexity Open
The evolution of star-forming regions and their thermal balance are strongly influenced by their chemical composition, that, in turn, is determined by the physico-chemical processes that govern the transition between the gas phase and the …
View article: Methoxymethanol formation starting from CO hydrogenation
Methoxymethanol formation starting from CO hydrogenation Open
Context. Methoxymethanol (CH 3 OCH 2 OH) has been identified through gas-phase signatures in both high- and low-mass star-forming regions. Like several other C-, O-, and H-containing complex organic molecules (COMs), this molecule is expec…
View article: Molecular Dynamics Simulations of Energy Dissipation on Amorphous Solid Water: Testing the Validity of Equipartition
Molecular Dynamics Simulations of Energy Dissipation on Amorphous Solid Water: Testing the Validity of Equipartition Open
Many different molecular species have been observed in the interstellar medium. These range from simple diatomic species to saturated organic molecules with several carbon atoms. The latter molecules are assumed to be formed predominantely…
View article: Quantification of the Role of Chemical Desorption in Molecular Clouds
Quantification of the Role of Chemical Desorption in Molecular Clouds Open
ConspectusDark molecular clouds have low temperatures of approximately 10 K and experience very little UV irradiation. These clouds are the birthplace of new stars and consist of gas and dust particles. The latter can act as a meeting plac…
View article: A non-energetic mechanism for glycine formation in the interstellar medium
A non-energetic mechanism for glycine formation in the interstellar medium Open
View article: VUV Photochemistry of PAHs Trapped in Interstellar Water Ice
VUV Photochemistry of PAHs Trapped in Interstellar Water Ice Open
View article: VUV Photochemistry of PAHs Trapped in Interstellar Water Ice
VUV Photochemistry of PAHs Trapped in Interstellar Water Ice Open
The mid-infrared emission of Polycyclic Aromatic Hydrocarbons is found in many phases of the interstellar medium.Towards cold dense clouds, however, the emission is heavily quenched.In these regions molecules are found to efficiently freez…
View article: Infrared resonant vibrationally induced restructuring of amorphous solid water
Infrared resonant vibrationally induced restructuring of amorphous solid water Open
Amorphous solid water (ASW) is abundantly present in the interstellar medium, where it forms a mantle on interstellar dust particles and it is the precursor for cometary ices. In space, ASW acts as substrate for interstellar surface chemis…
View article: Infrared Resonant Vibrationally Induced Restructuring of Amorphous Solid Water
Infrared Resonant Vibrationally Induced Restructuring of Amorphous Solid Water Open
Amorphous solid water (ASW) is abundantly present in the interstellar medium where it forms a mantle on interstellar dust particles and it is the precursor for cometary ices. In space, ASW acts as a substrate for interstellar surface chemi…
View article: On the mechanism of solid-state phase transitions in molecular crystals – the role of cooperative motion in (quasi)racemic linear amino acids
On the mechanism of solid-state phase transitions in molecular crystals – the role of cooperative motion in (quasi)racemic linear amino acids Open
During single-crystal-to-single-crystal (SCSC) phase transitions, a polymorph of a compound can transform to a more stable form while remaining in the solid state. By understanding the mechanism of these transitions, strategies can be deve…