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- W4220763604 abstract "<p>We investigated sodium/halides (F, Cl, Br and I) aqueous droplets <em>in vacuo</em> at the microscopic level from molecular dynamics simulations at the 100 ns scale performed using a sophisticated polarizable all atom force field whose parameters are assigned only from high end quantum ab initio computations [1]. Long range electrostatic and polarizable forces are computed according to a Fast Multipole Method scheme devoted to polarizable force fields based on the induced dipole moment approach [2]. For Cl, Br and I we simulated 10k water droplets corresponding to 0.2, 0.6, 2.0 and 4.6 M salt concentrations and on a range of temperatures included between 260 and 320K. For F, we simulated 10k droplets corresponding to 0.2, 0.6, 0.8 and 1M salt concentrations. We also simulated a reduced set of salty droplets at 300K (in particular corresponding to NaCl salts) at the 100k (up to 100 ns) and at the 1M water molecules scale (up to 30 ns) [3]. We present here a detailed analysis of the structural properties of these droplets regarding ion spatial distributions, ion aggregates (size, composition, morphology, lifetime and distribution), water ordering (relative to pure&#160;water droplets) and droplet surface potentials. In the particular case of NaCl droplets, we also discuss droplet curvature effects on the latter properties from data corresponding to 10k, 100k and 1M systems.</p><p>[1] Trumm <em>et al, Modeling the Hydration of Mono-Atomic Anions From the Gas Phase to the Bulk Phase: The Case of the Halide Ions F-, Cl-, and Br-</em>, J. Chem. Phys., <strong>136</strong> (2012) 044509.; R&#233;al F <em>et al</em>,&#160; <em>Revisiting a Many-Body Model for Water Based on a Single Polarizable Site. From Gas Phase Clusters to Liquid and Air/Liquid Water Systems, </em>J. Chem. Phys. <strong>139</strong> (2013) 114502.; R&#233;al F <em>et al, Structural, Dynamical, and Transport Properties of the Hydrated Halides: How Do At- and I- Bulk Properties Compare with those of the other Halides, from F- to I-,</em> J. Chem. Phys., <strong>144</strong> (2016) 124513</p>" @default.
- W4220763604 created "2022-04-03" @default.
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- W4220763604 date "2022-03-25" @default.
- W4220763604 modified "2023-09-27" @default.
- W4220763604 title "Sodium/halides aqueous droplets in vacuo at the sub micron scale : size, temperature and concentration effects on their structural properties from simulations at the microscopic level." @default.
- W4220763604 doi "https://doi.org/10.5194/egusphere-egu22-32" @default.
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