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Continuous Draw Spinning of Extra-Long Silver Submicron Fibers with Micrometer Patterning Capability
Xiaopeng Bai1, Suiyang Liao1, Ya Huang1
1State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China.
Nano Letters
|February 7, 2017
Summary
Researchers developed a continuous draw spinning method to produce ultrathin silver (Ag) fibers. This scalable technique creates highly conductive, flexible nanoscale wires for advanced electronics and energy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Ultrathin metal fibers are crucial for flexible electronics and energy conversion due to their conductivity and flexibility.
- Current industrial methods struggle with the continuous, low-cost production of high-quality nanoscale metal wires.
Purpose of the Study:
- To develop a scalable method for producing continuous, high-quality, ultrathin silver (Ag) fibers.
- To demonstrate the potential of these Ag fibers in flexible electronic applications, specifically as transparent electrodes.
Main Methods:
- Continuous draw spinning of silver nitrate (AgNO3)/polymer precursor fibers from an aqueous solution at speeds up to 8 m/s.
- Heat treatment of the precursor fibers to yield freestanding Ag submicron fibers.
- Fabrication and characterization of woven mats of aligned Ag submicron fibers as transparent electrodes.
Main Results:
- Successfully produced freestanding Ag submicron fibers with diameters as small as ~200 nm and lengths exceeding kilometers.
- Achieved high mechanical flexibility and electrical conductivity in the fabricated Ag fibers.
- Demonstrated high-performance flexible transparent electrodes with a sheet resistance of 7 Ω sq⁻¹ at 96% transparency.
Conclusions:
- Continuous draw spinning is a viable and scalable technique for fabricating ultralong, ultrathin, conductive metal fibers.
- This method offers a flexible and ultralow-cost approach for producing nanoscale conductive materials.
- The developed Ag submicron fibers show significant promise for applications in flexible electronics and transparent conductive films.
