Polymorphism of Metallic Sodium under Nanoconfinement

A V Uskov; D Yu Nefedov; E V Charnaya; J Haase; D Michel; Yu A Kumzerov; A V Fokin; A S Bugaev

doi:10.1021/acs.nanolett.5b04841

Polymorphism of Metallic Sodium under Nanoconfinement

Nano Lett. 2016 Jan 13;16(1):791-4. doi: 10.1021/acs.nanolett.5b04841. Epub 2016 Jan 4.

Authors

A V Uskov¹, D Yu Nefedov¹, E V Charnaya¹, J Haase², D Michel², Yu A Kumzerov³, A V Fokin³, A S Bugaev⁴

Affiliations

¹ Physics Department, St. Petersburg State University , St. Petersburg 198504, Russia.
² Faculty of Physics and Geophysics, Leipzig University , Leipzig D-04103, Germany.
³ A.F. Ioffe Physico-Technical Institute RAS , St. Petersburg 194021, Russia.
⁴ Moscow Institute of Physics and Technology , Moscow 141700, Russia.

PMID: 26714113
DOI: 10.1021/acs.nanolett.5b04841

Abstract

(23)Na NMR studies of sodium nanoparticles confined to porous glass with the 3.5 nm mean pore size were carried out. The emergence of the second component of the NMR line was observed below 240 K that evidences the occurrence of another modification of metallic sodium. The phase transition temperature is much higher than the martensite transformation temperature in bulk sodium.

Keywords: Knight shift; Sodium nanoparticles; nanoconfinement; polymorphism; porous glass.

Publication types

Research Support, Non-U.S. Gov't