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Electroplating Cobalt Films on Silicon Nanostructures for Sensing Molecules
Chihyang Chen1, Zhe Kan1, Zibo Wang1
1Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA.
Molecules (Basel, Switzerland)
|December 11, 2022
Summary
Cobalt and copper were electroplated onto laser-treated silicon nanospikes. Optimized cobalt structures formed nanoscale bridges, showing potential for gas sensors interacting with carbon monoxide and carbon dioxide.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Femtosecond laser irradiation creates nano-spiked silicon substrates.
- Electroplating is a method for depositing thin metal films.
Purpose of the Study:
- To electroplate cobalt (Co) and copper (Cu) onto nano-spiked silicon substrates.
- To investigate the formation and properties of nanoscale bridges formed during cobalt electroplating.
- To explore the potential application of these structures in gas sensing.
Main Methods:
- Femtosecond laser irradiation of silicon substrates.
- Electroplating of cobalt and copper.
- Energy-dispersive X-ray (EDX) analysis using a scanning electron microscope (SEM).
- Time-controlled electroplating and oxidation processes.
Main Results:
- Cobalt and copper were successfully coated on nanospike surfaces without altering morphology.
- Nanoscale bridges formed, connecting cobalt-coated silicon spikes.
- Bridge formation was linked to cobalt oxidation and optimized via controlled processes.
- The special structure demonstrated interaction with carbon monoxide and carbon dioxide under visible light irradiation.
Conclusions:
- The study successfully fabricated Co and Cu coated nano-spiked silicon structures.
- Optimized cobalt structures with nanoscale bridges show promise for gas sensing applications.
- The unique nanostructure's interaction with CO and CO2 under light irradiation warrants further investigation for sensor development.
