| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior Related to Interface Physics IV
|
| Presentation Title |
Unveiling size-dependent strength in noble metal nanoparticles: A comparative study of Pt, Au, and Ag. |
| Author(s) |
Amit Kumar Prasad, Ruikang Ding, Ashlie Martini, Tevis D. B. Jacobs, Douglas Zhang, Ting Liu |
| On-Site Speaker (Planned) |
Amit Kumar Prasad |
| Abstract Scope |
While it is well known that noble metal nanoparticles, crucial for catalysis, electronics, and biomedical applications, exhibit size-dependent mechanical properties, the mechanisms underlying this behavior are still in dispute. Using in situ transmission electron microscopy, we characterized the mechanical response of Pt, Au, and Ag nanoparticles at sizes ranging from 100 nm down to 3 nm in diameter. The results confirm the well-known “smaller-is-stronger” behavior up to a critical size, but also validate the “smaller-is-weaker” trend below that. Most importantly, the results distinguish mechanisms, such as dislocation plasticity and homogeneous “diffusive” deformation. Different trends emerge from the three different materials, with peak strength occurring at different sizes, and results in each regime compared against established and emerging models. This comparative analysis provides essential insights for optimizing noble metal nanoparticles in various nanotechnological applications that demand robust mechanical performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Mechanical Properties, Characterization |