Publications associées à Observation of a Plastic Crystal in Water-Ammonia Mixtures under High Pressure and Temperature

Publications associées (16)

Phase formation and texture evolution in 316L-CuCrZr multi-material structures fabricated by laser powder bed fusion

Christian Leinenbach, Johann Michler, Antonios Nikolaos Baganis

Steel-copper multi-material structures produced via Additive Manufacturing pose challenges in laser co-processing and microstructural control. This work employs neutron imaging, Electron Backscatter Diffraction (EBSD), and Energy Dispersive Spectroscopy (E ...

2025

Observation of plastic ice VII by quasi-elastic neutron scattering

Richard Gaal, Livia Eleonora Bove Kado, Maria Rescigno

Water is the third most abundant molecule in the universe and a key component in the interiors of icy moons, giant planets and Uranus- and Neptune-like exoplanets1, 2–3. Owing to its distinct molecular structure and flexible hydrogen bonds that readily ada ...

2025

Lattice bond chains administer kink anisotropy and inform strategies of theophylline crystal self-healing

Georg Fantner

How molecular-level understanding of the crystal growth mechanisms and their relation to lattice bonds informs the rational design of crystals with desired shapes and properties has remained elusive. Here we employ theophylline crystals and drive them into ...

2025

N2O Activation and NO Adsorption Control the Simultaneous Conversion of N2O and NO Using NH3 over Fe-ZSM-5

Oliver Kröcher, Filippo Buttignol

Fe-exchanged zeolites are heterogeneous catalysts that can potentially ensure simultaneous conversion of nitrous oxide (N2O) and nitric oxide (NO) using ammonia (NH3) as a selective reducing agent through their selective catalytic reduction reaction (N2O-N ...

AMER CHEMICAL SOC2025

Bullet pressure-cell design for neutron scattering experiments with horizontal magnetic fields and dilution temperatures

Henrik Moodysson Rønnow, Richard Gaal, Ellen Fogh, Gaétan Charles Antoine Giriat, Luc Testa, Jana Pásztorová

The simultaneous application of high magnetic fields and high pressures for controlling magnetic ground states is important for testing our understanding of many-body quantum theory. However, the implementation for neutron scattering experiments presents a ...

2025

Study of single molecule phenomena in plasmonic nanocavitites

Sachin Suresh Verlekar

The central aim of this thesis is to investigate single molecule phenomena in self-assembled plasmonic nanocavities, focusing on achieving single molecule sensitivity within these highly confined electromagnetic environments. While self-assembled nanocavit ...

EPFL2025

Thermodynamic and kinetic analysis of autothermal syngas-generating limestone calcination process for ammonia synthesis

Zezhong Li

A novel autothermal methane-reforming limestone-calcination process is analyzed through thermodynamic and kinetic investigations to yield syngas for direct ammonia production. A comprehensive correlation is developed to determine the required gaseous feed ...

2025

Synthesis and characterization of low-dimensional organic-inorganic perovskites for detection and photovoltaic applications

Colin Jeanguenat

Low-dimensional perovskite such as layered halide perovskite and perovskite nanocrystals have attracted attention in the past decade. These materials have impressive optoelectronic properties such as high photoluminescence and improved stability relative t ...

EPFL2025

A graphical pipeline platform for MRS data processing and analysis: MRSpecLAB

Matthias Hugues Jörg Kockisch, Lijing Xin, Mark Stephan Widmaier, Ying Xiao, Zhiwei Huang, Antonia Kaiser, André Döring, Robin Carlet, Xinyu Liu

Magnetic resonance spectroscopy (MRS) and magnetic resonance spectroscopic imaging (MRSI), are non-invasive techniques used to quantify biochemical compounds in tissue, such as choline, creatine, glutamate, glutamine, γ-aminobutyric acid, N-acetylaspartate ...

2025

Structural phase transition in NH₄F under extreme pressure conditions

Richard Gaal

Ammonium fluoride (NH₄F) exhibits a variety of crystalline phases depending on temperature and pressure. By employing Raman spectroscopy and synchrotron X-ray diffraction beyond megabar pressures (up to 140 GPa), we have here observed a novel dense solid p ...

2024

Characterizing the diffuse continuum excitations in the classical spin liquid h-YMnO3

Jakob Lass

We extend previous inelastic neutron scattering results on the geometrically frustrated antiferromagnet hexagonal-YMnO3, 3 , which has been suggested to belong to the class of classical spin liquids. We expand the energy transfer range of the diffuse signa ...

AMER PHYSICAL SOC2024

Meta-Substituted Asymmetric Azobenzenes: Insights into Structure-Property Relationship

Tatiana Antonova Pachova, Giuseppe Sforazzini

This article presents a comprehensive investigation into the functionalization of methoxyphenylazobenzene using electron-directing groups located at the meta position relative to the azo group. Spectroscopic analysis of meta-functionalized azobenzenes reve ...

MDPI2024

Oxygen isotope fractionation during amorphous to crystalline calcium carbonate transformation at varying relative humidity and temperature

Anders Meibom, Arthur Adams

Crystalline calcium carbonate isotope compositions have been widely used to reconstruct past environments. However, if their isotopic compositions are modified because of crystallization from an amorphous precursor, their reliability as paleo-geochemical p ...

Elsevier BV2024

Spatial Conformation Engineering of Aromatic Ketones for Highly Efficient and Stable Perovskite Solar Cells

Minhuan Wang, Michael Graetzel, Shaik Mohammed Zakeeruddin, Likai Zheng, Xiaoqing Jiang

Carbonyl-containing materials employed in state-of-the-art hybrid lead halide perovskite solar cells (PSCs) exhibit a strong structure-dependent electron donor effect that predominates in defect passivation. However, the impact of the molecular spatial con ...

AMER CHEMICAL SOC2024

Well-Defined Co2 Dual-Atom Catalyst Breaks Scaling Relations of Oxygen Reduction Reaction

Xile Hu, Yiwei Zheng

The 4-electron oxygen reduction reaction (ORR) under alkaline conditions is central to the development of non-noble metal-based hydrogen fuel cell technologies. However, the kinetics of ORR are constrained by scaling relations, where the adsorption free en ...

AMER CHEMICAL SOC2024

Performance polyamides built on a sustainable carbohydrate core

Kalaiyarasi Puvanenthiran, Clément Nicolas Broggi, François Maréchal, Véronique Michaud, Jeremy Luterbacher, Holger Frauenrath, Lorenz Perry Manker, Marie Jane Francine Jones, Maxime Alexandre Clément Hedou, Yildiz Aydan Rengin Kupper

Sustainably producing plastics with performance properties across a variety of materials chemistries is a major challenge-especially considering that most performance materials use aromatic precursors that are still difficult to source sustainably. Here we ...

Nature Portfolio2024