Issue 17, 2023

Probing the sublimation kinetics of Ag, Ag@TiO2, and Ag@C nanoparticles

Abstract

In this study, we used an in situ transmission electron microscopy (TEM) heating system to investigate the sublimation-induced morphological changes of cubic Ag nanoparticles (NPs) and Ag-based core–shell structures and the influence of shell coverage on the thermal stability. In contrast to previous research performed with small Ag nanoparticles (<30 nm), here we found that large-particle Ag NPs (>50 nm) underwent a three-stage sublimation-induced morphological change at 800 °C, in the sequence uniform (I)–nonuniform (II)–uniform (III) sublimation. The (110) and (100) planes were the main sublimation planes during stages I and II. When the reaction reached stage III, the sublimation rate decreased as a result of an increase in the sublimation energy barrier. For core–shell NPs, the sublimation process began with stage II. For Ag NPs presenting TiO2 shells, the sublimation process was initiated at a relatively low temperature (700–750 °C) because of a local heating effect; for Ag NPs with carbon shells, the reaction was suppressed through surface atom passivation, thereby enhancing the thermal stability.

Graphical abstract: Probing the sublimation kinetics of Ag, Ag@TiO2, and Ag@C nanoparticles

Supplementary files

Article information

Article type
Communication
Submitted
16 Jan 2023
Accepted
28 Mar 2023
First published
28 Mar 2023

Nanoscale, 2023,15, 7722-7729

Probing the sublimation kinetics of Ag, Ag@TiO2, and Ag@C nanoparticles

H. Huang, K. Hsiao, Y. Tseng, Y. Chen and M. Lu, Nanoscale, 2023, 15, 7722 DOI: 10.1039/D3NR00258F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements