Immobilization of single argon atoms in nano-cages of two-dimensional zeolite model systems

Jian-Qiang Zhong, Mengen Wang, Nusnin Akter, John D. Kestell, Alejandro M. Boscoboinik, Taejin Kim, Dario J. Stacchiola, Deyu Lu and J. Anibal Boscoboinik ()
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Jian-Qiang Zhong: Center for Functional Nanomaterials, Brookhaven National Laboratory
Mengen Wang: Center for Functional Nanomaterials, Brookhaven National Laboratory
Nusnin Akter: Center for Functional Nanomaterials, Brookhaven National Laboratory
John D. Kestell: Center for Functional Nanomaterials, Brookhaven National Laboratory
Alejandro M. Boscoboinik: Instituto de Fisica Aplicada INFAP-CONICET-Departamento de Fìsica-Universidad Nacional de San Luis
Taejin Kim: Stony Book University
Dario J. Stacchiola: Center for Functional Nanomaterials, Brookhaven National Laboratory
Deyu Lu: Center for Functional Nanomaterials, Brookhaven National Laboratory
J. Anibal Boscoboinik: Center for Functional Nanomaterials, Brookhaven National Laboratory

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract The confinement of noble gases on nanostructured surfaces, in contrast to bulk materials, at non-cryogenic temperatures represents a formidable challenge. In this work, individual Ar atoms are trapped at 300 K in nano-cages consisting of (alumino)silicate hexagonal prisms forming a two-dimensional array on a planar surface. The trapping of Ar atoms is detected in situ using synchrotron-based ambient pressure X-ray photoelectron spectroscopy. The atoms remain in the cages upon heating to 400 K. The trapping and release of Ar is studied combining surface science methods and density functional theory calculations. While the frameworks stay intact with the inclusion of Ar atoms, the permeability of gasses (for example, CO) through them is significantly affected, making these structures also interesting candidates for tunable atomic and molecular sieves. These findings enable the study of individually confined noble gas atoms using surface science methods, opening up new opportunities for fundamental research.

Date: 2017
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DOI: 10.1038/ncomms16118

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