Phosphorus doped few layer WS flakes grown by chemical vapor deposition for hydrogen evolution reactions.

Water splitting is a promising pathway for hydrogen production, providing an environmentally friendly fuel source. More recently, great attention has been given to transition metal dichalcogenides (TMDCs) because of their interesting chemical and physical properties. In particular, tungsten disulfide (WS) has garnered significant attention as a catalyst for this application due to its unique layered 2D structure.

Wilhelm Conrad Röntgen's Strasbourg Years (1872-1879): W.C. Röntgen - Two Decades before the Discovery of X-rays (with GPX Track "Röntgen in Strasbourg").

Two decades before his groundbreaking discovery of X-rays in 1895, Wilhelm Conrad Röntgen worked from 1872-1879 as an assistant, private lecturer, and finally associate professor at the University of Strasbourg, which was then part of the German Empire. This period was briefly interrupted in 1875/76 by Röntgen's first professorship at the Agricultural Academy in Hohenheim.Based on publications about W.

Heavy-boundary mode patterning and dynamics of topological phonons in polymer chains and supramolecular lattices on surfaces.

In topological band theory, phonon boundary modes consequence of a topologically non-trivial  band structure feature desirable properties for atomically-precise technologies, such as robustness against defects, waveguiding, and one-way transport. These topological phonon boundary modes remain to be studied both theoretically and experimentally in synthetic materials, such as polymers and supramolecular assemblies at the atomistic level under thermal fluctuations. Here we show by means of molecular simulations, that surface-confined Su-Schrieffer-Heeger (SSH) phonon analogue models express robust topological phonon boundary modes at heavy boundaries and under thermal fluctuations.

Voltage-Gated Switching of Moiré Patterns in Epitaxial Molecular Crystals.

Studying molecular materials at the nanoscale allows us to gain a deeper understanding of supramolecular structure formation and serves as the basis for rationally controlling the resulting interfacial properties. Here, we describe the formation of extended Moiré patterns resulting from the assembly of dipolar π-conjugated molecules on highly oriented pyrolytic graphite at the liquid-solid interface as characterized by scanning tunneling microscopy (STM). By switching the bias of the sample and thus the orientation of the external electric field in the vicinity of the STM junction, structural reorganization of the molecular building blocks and the resulting organic 2D crystal is induced and can conveniently be monitored by the appearance and disappearance of the Moiré patterns.

Laser-induced tuning of crystallization in tetracene thin films.

This study explores how laser light affects the morphology of tetracene films, and it presents novel strategies for improving the creation of thin films used in (opto-)electronic devices. We demonstrate that laser light (532 nm, 1.1 W mm), applied during tetracene deposition, not only increases grain size but also induces photoalignment.