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A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
Published on: January 21, 2016
A new approach causing the patterns fabricated by silver nanoparticles to be conductive without sintering
Yao Tang1, Wei He, Guoyun Zhou
1State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan, People's Republic of China. TangYao2003@163.com
Nanotechnology
|August 17, 2012
Summary
Silver nanoparticles (Ag NPs) were synthesized and found to spontaneously coalesce in the presence of chloride ions. This allows for the fabrication of conductive silver lines on FR-4 substrates with 16% bulk silver conductivity.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Silver nanoparticles (Ag NPs) are crucial for conductive materials.
- Traditional sintering of Ag NPs requires high temperatures, limiting applications.
- Chloride ions can influence nanoparticle behavior and aggregation.
Purpose of the Study:
- To synthesize silver nanoparticles (Ag NPs) using a polyol reduction method.
- To investigate the spontaneous coalescence of Ag NPs in the presence of chloride ions.
- To fabricate conductive silver lines on FR-4 substrates and evaluate their conductivity.
Main Methods:
- Synthesis of Ag NPs (approx. 90 nm) via polyol reduction of silver nitrate with ethylene glycol (EG) and poly(vinyl pyrrolidone) (PVP).
- Induction of Ag NP coalescence using chloride ions without high-temperature sintering.
- Fabrication of conductive silver lines on FR-4 substrate.
Main Results:
- Ag NPs exhibited spontaneous coalescence when exposed to chloride ions.
- This coalescence occurred without conventional high-temperature sintering.
- Conductive silver lines achieved approximately 16% of bulk silver conductivity.
Conclusions:
- Spontaneous Ag NP coalescence in the presence of chloride ions offers a low-temperature fabrication route.
- This method enables the creation of conductive patterns on FR-4 substrates.
- The achieved conductivity is suitable for certain electronic device applications.
