About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
A Novel Nanoindentation Protocol to Characterize Surface Free Energy of Superhydrophobic Nanopatterned Materials |
Author(s) |
Edoardo Rossi, Pardhasaradhi Sudharshan Phani, Warren Carl Oliver, Marco Sebastiani |
On-Site Speaker (Planned) |
Edoardo Rossi |
Abstract Scope |
The non-destructive measurement of surface free energy (SFE) in nano-patterned super-hydrophobic surfaces is challenging as the conventional contact angle measurements (CAMs) are often time-consuming and not feasible.
In this work, a novel nanoindentation-based method will be presented to measure the pull-off adhesive forces by a combination of improved instrumentation capabilities (high precision electronics and controlled environment) and a robust test protocol that allows precise control of the interaction depths for implementing adhesion-accounting contact mechanics models.
The new method is validated on carefully prepared reference surfaces such as highly energetic, atomically flat muscovite mica crystals and DSP (CZ) germanium <100> crystals. It was found to be capable of measuring SFE over five orders of magnitude, from hydrophilic to super-hydrophobic surfaces (produced by both patterning, fluorinate silane coating and their combination). CAM, wherever applicable, provided comparative data. Finally, the application of the method to understand surface functionalization processes will be presented. |
Proceedings Inclusion? |
Planned: |