Atmosphere of Mercury

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We present two case studies of tropospheric aerosol transport observed over the high-altitude Helmos observatory (1800–2300 m a.s.l.) in Greece during September 2021. Two cases were linked to Saharan dust intrusions, of which one was additionally linked to a mixture of biomass-burning and continental aerosols. Aerosol vertical profiles from the AIAS mobile backscatter/depolarization lidar (532 nm, NTUA) revealed distinct aerosol layers between 2 and 6 km a.s.l., with particle linear depolarization ratio val

Chronoamperometry was used to study the dynamics of Pt nanoparticle (NP) collision with an inert ultramicroelectrode via electrocatalytic amplification (ECA) towards hydrogen evolution reaction. First, ECA and dynamic light scattering (DLS) results reveal ...

Despite significant advances in the fabrication and applications of microreactors for production of chemicals, their use for catalytic reactions remains a challenge, especially in fine chemical synthesis where the selectivity towards the desired product is ...

This paper focuses on interpreting variations in the NPA measured energy distribution of neutral fluxes from the TCV high density H-mode plasma discharges with strong third harmonic electron cyclotron heating (P_{X3}>P_{\Omega}). Two quasi-stationary regim ...

Innovative structured catalysts based on nanoparticles of gold supported on activated carbon fibers (ACF) in the form of woven fabrics are presented for low-temperature CO oxidation. Gold was deposited by adsorption from aqueous solution of ethylenediamine complex [Au(en)2]Cl3 followed by reduction in hydrogen. The catalysts were studied under transient reaction conditions and characterized by high-resolution transmission electron microscopy (HRTEM) and X-ray energy dispersive analysis (EDS). HRTEM-EDS show

Using a first-principles approach, we study Si 2p core-level shifts at water and hydrogen covered Si(001)2 x 1 surfaces. After allowing for full relaxation of the surface structures, core-level shifts are calculated including core-hole relaxation effects. We find that dissociated water on the Si(001)2 x 1 surface induces a core-level shift of 1.1 eV to higher binding energies, in good agreement with experiment. In the case of the hydrogen terminated Si(001)2 x 1 surface, calculated surface shifts are small

Absorption, emission and fluorescence-excitation spectra are reported for Hg atoms and Hg2 mols. in Ar, Kr, Xe and N2 matrixes upon excitation by synchrotron radiation in the 260-90 nm range. The fluorescence emitted from all levels issued from the 6s6p configuration (including strongly forbidden 3P0 -> 1S0 and 3P2 -> 1S0 transitions) upon the excitation of autoionized (5d)9(6s)2(np) levels is explained by ionization-recombination processes. Upon excitation of the 1P1 level, the efficiency of the 1P1 -> 3PJ

Trace contaminants in sputter atmospheres (10(-2) mbar Ar) are determined with a mass spectrometer whose ionizer is directly exposed to the process pressure, whereas the quadrupole filter is kept at high vacuum. The background limitations inherent to conventional differentially pumped analyzers are overcome. Detection limits are 1 ppm for H2O and few ppb for other species.

Atmosphere of Mercury

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Optical Properties and Radiative Forcing Estimations of High-Altitude Aerosol Transport During Saharan Dust Events Based on Laser Remote Sensing Techniques (CLIMPACT Campaign 2021, Greece)

Electrochemical Dynamics of a Single Platinum Nanoparticle Collision Event for the Hydrogen Evolution Reaction

Continuously operated falling film microreactor for selective hydrogenation of carbon-carbon triple bonds

Ion Temperature Fluctuations in ELMy H-mode of the X3 EC-heated Plasmas on TCV

Structured Au/FeOx/C catalysts for low temperature CO oxidation

First-principles study of Si 2p core-level shifts at water and hydrogen covered Si(001)2x1 surfaces

Spectroscopy and relaxation paths of higher electronic states of mercury atoms and dimers in rare gas matrixes

Mass-Spectrometric Detection of Low-Ppm Contaminants in Sputter Process Systems at 10-2 Mbar, Using a Directly Exposed Ion-Source