About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Controlled Nanoparticle Deposition via Cathodic Corrosion at SECM Ultramicroelectrode Tips |
| Author(s) |
Selene Koremenos-Tsebelis, Lauren Rich |
| On-Site Speaker (Planned) |
Selene Koremenos-Tsebelis |
| Abstract Scope |
This study investigates cathodic corrosion, the degradation of metals at high negative potentials, as a strategy for controlled metal nanoparticle deposition. Cathodic corrosion at the tip of an ultramicroelectrode (UME) used as a scanning electrochemical microscopy (SECM) probe presents an opportunity for nanoscale material fabrication. However, the mechanisms driving cathodic corrosion remain incompletely understood. The present understanding is that high current densities drive hydrogen evolution, generating reactive metal hydride intermediates that destabilize and escape the interface. These intermediates oxidize, nucleate, and form metal nanoparticles. This work’s hypothesis is that metal nanoparticles generated by cathodic corrosion at UME probe tips can cross the probe-substrate gap, and deposit as films of metal nanoparticles. This point is tested for platinum, copper, aluminum, silver, and gold UMEs positioned over collector substrates in aqueous electrolyte solutions. Preliminary findings demonstrate that cathodic corrosion of platinum UMEs in aqueous solutions successfully deposits nanoparticles onto substrates. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Nanotechnology, Other |