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Electrically Interconnected Platinum Nanonetworks for Flexible Electronics
Sherjeel Mahmood Baig1,2, Hideki Abe1,2
1National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 Japan.
ACS Omega
|March 31, 2025
Summary
Platinum nanonetworks offer a durable alternative to brittle indium tin oxide for flexible electronics. These networks maintain electrical stability even after repeated bending, enabling more robust wearable devices.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Flexible electronics require durable interconnects, but brittle indium tin oxide (ITO) limits device longevity.
- Growing demand for conformable, lightweight devices necessitates advanced materials for reliable electrical connections.
Purpose of the Study:
- To develop and characterize platinum (Pt) nanonetworks as a flexible and stable alternative to ITO for electronic applications.
- To investigate the fabrication process and electrical properties of Pt nanonetworks on polyimide (PI) substrates.
Main Methods:
- Fabrication of Pt nanonetworks via atmospheric treatment of platinum-cerium (Pt-Ce) alloy thin films on PI substrates.
- Characterization of nanonetwork morphology, mechanical flexibility, and electrical stability under repeated bending.
- Analysis of critical temperature and time parameters for nanonetwork formation.
Main Results:
- Achieved interconnected Pt nanonetworks with an average thickness below 50 nm.
- Demonstrated high mechanical flexibility, maintaining sheet resistance (approx. 2.76 kΩ/sq) after 1000 bending cycles down to 1.5 mm diameter.
- Identified critical temperature and time thresholds for forming interconnected nanonetworks versus disconnected nanoislands.
Conclusions:
- Pt nanonetworks provide superior electrical stability and mechanical flexibility compared to ITO for flexible electronics.
- The fabrication process offers control over nanonetwork formation, enabling tailored electrical properties (inductor-like vs. capacitor-like behavior).
- This advancement supports the development of more durable and versatile flexible electronic devices.
