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Published on: February 27, 2013
Laser-Induced Synthesis and Passivation of Intrinsically Antioxidative Nano-Copper for Durable Electronics
Zimo Cai1, Huayu Luo1, Yuyu Hou1
1State Key Laboratory of Fluid Power & Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, China.
Advanced Materials (Deerfield Beach, Fla.)
|August 5, 2026
Summary
Researchers developed laser-induced synthesis and passivation for durable copper (Cu) nanomaterials. This method creates robust nano-Cu with dual-ligand barriers, enhancing conductivity and enabling reliable electronics in extreme conditions.
Area of Science:
- Materials Science
- Nanotechnology
- Electronics Engineering
Background:
- High costs and storage needs hinder pure metallic inks for advanced electronics.
- Copper (Cu) derived from oxides is cheaper but prone to oxidation and conductivity failure.
- Existing solutions often require additional encapsulation for durability.
Purpose of the Study:
- To develop a cost-effective and sustainable method for producing robust copper nanomaterials.
- To enhance the durability of copper interconnects under harsh humid-thermal conditions without encapsulation.
- To demonstrate the application of these enhanced copper nanomaterials in wearable electronics.
Main Methods:
- Laser-induced synthesis and selective metallization of copper nanoparticles.
- Surface functionalization with dual-ligand barriers: formate coordination and oleylamine hydrophobization.
- Testing of passivated nano-Cu durability under extreme humid-thermal conditions (190°C, 90°C/90% RH).
Main Results:
- Achieved superior durability of nano-Cu under harsh humid-thermal conditions without external encapsulation.
- Demonstrated limited resistance increase in passivated Cu interconnects despite prolonged environmental stress.
- Successfully fabricated conformal and wearable sensor systems using the robust Cu interconnects.
Conclusions:
- Laser-induced synthesis and passivation provide a viable route to cost-effective, high-performance copper nanomaterials.
- The dual-ligand surface modification effectively protects copper from oxidation and degradation.
- This technology enables the development of endurable electronics for real-life extreme environments.
