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The adsorption geometry of the planar 3, 4, 9, 10-perylene-tetracarboxylic-dianhydride (PTCDA) moleculein the commensurate c(8 × 8) structure on Ag(100) was determined from the analysis of the intensities in low-energy electron diffraction (LEED-IV). Using data from different angles of incidence and optimized computercode, we were able to overcome earlier challenges given by the limitations of the experimental data set and thecalculation times required for the large unit cell with many atoms. [...]

In this study, we examine the Soret effect of ammonium chloride (NH4Cl) and its alkyl-substitutedderivatives: dimethylammonium chloride (DMACl), ethylammonium chloride (EACl), and trimethylammoniumchloride (TMACl) in aqueous solution using infrared thermal diffusion forced Rayleigh scattering.The Soret coefficient, ST, increases systematically with alkyl substitution, following the trend NH4Cl <<DMACl < EACl << TMACl, while hydrophilicity decreases correspondingly. Across the investigated temperaturerange (15−45◦C) and concentrations (1–4 mol/kg), ST increases with both temperature andthe degree of alkyl substitution [...]

On-surface synthesis enables the tunable preparation of diverse molecular systems with tailored properties. Recently, the highly selective synthesis of kekulene (>99%) on Cu(111) and isokekulene (92%) on Cu(110) from the same molecular precursor was demonstrated. [...]