Work

Long-term aging of multiwall nanotubes and fullerene-like nanoparticles of WS2

Year: 2025

Type: article

Abstract: Tungsten disulfide is an important compound with layered structure (2D-material). Chemically it is less stable than tungsten trioxide and hence undergoes oxidation upon exposure to the ambient atmosphere. Although nanoparticles of tungsten disulfide are metastable, hollow-closed nanostructures , i.e. fullerene-like WS 2 (IF-WS 2 ) and nanotubes thereof are kinetically stabilized because they present their basal ( 001 ) surface to the outer world. In this work, the oxidation of IF-WS 2 and nanotubes stored under different conditions for 17–26 years have been studied. It was found that the degree of oxidation depends on the storage conditions. In fact, nanoparticles which were stored for long time and protected from the ambient atmosphere oxidized only marginally, while others kept under less favorable conditions suffered severe oxidation . Furthermore, the degradation of the IF nanoparticles is autocatalytic with clear acceleration over time. This work has also practical significance, since the shelf-life of IF-WS 2 nanoparticles , which are used as solid-state lubricants commercially have not been studied before.

Source: Journal of Solid State Chemistry

DOI: 10.1016/j.jssc.2025.125259

Authors: R. Rosentsveig, Y. Feldman, V. Kundrat, I. Pinkas, A. Zak, R. Tenne

Institutions: Weizmann Institute of Science, Thermo Fisher Scientific (Czechia), Holon Institute of Technology

Language: English

Topic: 2D Materials and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,540

Funders: North Atlantic Treaty Organization, Perlman Family Foundation