Helium nanodroplets doped with copper and water

Raggl, Stefan; Gitzl, Norbert; Martini, Paul; Scheier, P.; Echt, Olof

doi:10.1140/epjd/e2018-90150-7

Cited by 6 publications

(11 citation statements)

References 56 publications

(80 reference statements)

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“…Krypton has 6 naturally occurring isotopes, including 4 with abundances above 10% ( 82 Kr at 11.58%, 83 Kr at 11.49%, 84 Kr at 57.00%, and 86 Kr at 17.30%); its average mass is 83.8 u. Hence, the spectrum of Kr-doped HNDs in Figure 1d (note the linear y-scale) is congested even though it covers only a small cluster size range.…”

Section: Resultsmentioning

confidence: 99%

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Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe

et al. 2019

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We use a novel technique to solvate silver cations in small clusters of noble gases. The technique involves the formation of large, superfluid helium nanodroplets that are subsequently electron ionized, mass-selected by deflection in an electric field, and doped with silver atoms and noble gases (Ng) in pickup cells. Excess helium is then stripped from the doped nanodroplets by multiple collisions with helium gas at room temperature, producing cluster ions that contain no more than a few dozen noble gas atoms and just a few (or no) silver atoms. Under gentle stripping conditions, helium atoms remain attached to the cluster ions, demonstrating their low vibrational temperature. Under harsher stripping conditions, some of the heavier noble gas atoms will be evaporated as well, thus enriching stable clusters of Ng n Ag m + at the expense of less stable ones. This results in local anomalies in the cluster ion abundance, which is measured in a high-resolution time-of-flight mass spectrometer. On the basis of these data, we identify specific "magic" sizes n of particularly stable ions. There is no evidence, however, for enhanced stability of Ng 2 Ag + , in contrast to the high stability of Ng 2 Au + that derives from the covalent nature of the bond for heavy noble gases. "Magic" sizes are also identified for Ag 2 + dimer ions complexed with He or Kr. Structural models will be tentatively proposed. A sequence of magic numbers n = 12, 32, and 44, indicative of three concentric solvation shells of icosahedral symmetry, is observed for He n H 2 O + .

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Section: Resultsmentioning

confidence: 99%

“…We have previously reported mass spectra of He n Cu + clusters, formed by doping neutral HNDs with copper and performing a subsequent electron ionization . For this system, the relative size is 0.77, slightly larger than that of Ne n Cu + .…”

Section: Discussionmentioning

confidence: 96%

Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe

et al. 2019

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“…32 With the exception of this work, there are only two other published mass spectrometric studies of singly charged noble metal ions complexed with more than two noble gas atoms: One from our lab which suggest that He6Cu + , He12Cu + , and He24Cu + , are particularly stable. 33 And another one by Froudakis et al who observed NenCu + (n  24) and ArnCu + (n  150). 34 The abundance distributions indicated enhanced cluster ion stability at n = 4 and 12 for NenCu + but at n = 4 and 6 for ArnCu + .…”

Section: Introductionmentioning

confidence: 94%

Atomic Gold Ions Clustered with Noble Gases: Helium, Neon, Argon, Krypton, and Xenon

et al. 2019

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High-resolution mass spectra of helium droplets doped with gold and ionized by electrons reveal He n Au+ cluster ions. Additional doping with heavy noble gases results in Ne n Au+, Ar n Au+, Kr n Au+, and Xe n Au+ cluster ions. The high stability predicted for covalently bonded Ar2Au+, Kr2Au+, and Xe2Au+ is reflected in their relatively high abundance. Surprisingly, the abundance of Ne2Au+, which is predicted to have zero covalent bonding character and no enhanced stability, features a local maximum, too. The predicted size and structure of complete solvation shells surrounding ions with essentially nondirectional bonding depends primarily on the ratio σ* of the ion–ligand versus the ligand–ligand distance. For Au+ solvated in helium and neon, the ratio σ* is slightly below 1, favoring icosahedral packing in agreement with a maximum observed in the corresponding abundance distributions at n = 12. He n Au+ appears to adopt two additional solvation shells of I h symmetry, containing 20 and 12 atoms, respectively. For Ar n Au+, with σ* ≈ 0.67, one would expect a solvation shell of octahedral symmetry, in agreement with an enhanced ion abundance at n = 6. Another anomaly in the ion abundance at Ar9Au+ matches a local maximum in its computed dissociation energy.

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“…The paper by Raggl et al [31] reported the results of a gas-phase study of electron ionization of copperwater complexes formed in ultracold helium nanodroplets. This study was motivated by a potential use of copper nanoparticles as low-cost candidates for the catalytic splitting of water and production of hydrogen gas.…”

Section: Structure and Dynamics Of Atomic Cluster Systemsmentioning

confidence: 99%

Topical Issue on atomic cluster collisions

et al. 2019

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The rapidly emerging field of atomic cluster collisions attracts strong research interest of many experimental and theoretical groups worldwide. Being a highly interdisciplinary field, it has numerous links with atomic, molecular and optical physics, astrophysics, plasma physics, biophysics, physical chemistry, solid state physics and even molecular biology. This Topical Issue presents a state-of-the-art description of current research activities in the field of atomic cluster collisions and atomic cluster science. The contributions to this Issue represent experimental, theoretical and computational studies both at the fundamental level of elementary mechanisms and at a more applied level which is necessary in numerous applications of nano-and biotechnology, materials science and medicine.

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Helium nanodroplets doped with copper and water

Cited by 6 publications

References 56 publications

Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe

Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe

Atomic Gold Ions Clustered with Noble Gases: Helium, Neon, Argon, Krypton, and Xenon

Topical Issue on atomic cluster collisions

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