Large-Scale Rapid Laser Sintering of Highly Stretchable Electrodes Using a Homogenized Rectangular Laser Beam
| Autor: | Ji Hun Yuk, Yong-Sung Eom, Jiho Joo, Sung-Hoon Choa, Hyun Jin Nam, Kwang-Seong Choi |
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| Rok vydání: | 2021 |
| Předmět: |
Polyester resin
chemistry.chemical_classification Materials science Biomedical Engineering Sintering Bioengineering 02 engineering and technology General Chemistry Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 01 natural sciences 0104 chemical sciences law.invention Antenna efficiency Selective laser sintering chemistry law Electrode General Materials Science Laser power scaling Composite material 0210 nano-technology |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 21:2959-2968 |
| ISSN: | 1533-4880 |
| Popis: | This study explored the feasibility of a fast and uniform large-scale laser sintering method for sintering stretchable electrodes. A homogenized rectangular infrared (IR) laser with a wavelength of 980 nm was used in the sintering process. A highly stretchable composite electrode was fabricated using silver (Ag) microparticles and Ag flakes as the fillers and polyester resin as the binder on the polyurethane substrate. This laser-sintering method showed a sintering time of 1 sec and a very uniform temperature across the surface, resulting in enhancing the conductivity and stretchability of the electrodes. The effects of the laser power on the electrical and electromechanical properties of the electrodes were investigated. Using stretching, bending, and twisting tests, the feasibility of the laser-sintered stretchable electrodes was comprehensively examined. The electrode that was sintered at a laser power of 50 W exhibited superior stretchability at a strain of 210%, high mechanical endurance of 1,000 repeated cycles, and excellent adhesion. The stretchable electrodes showed excellent bendability and twistability in which the electrodes can be bent up to 1 mm and twisted up to 90° without any damage; thus, they are highly applicable as stretchable electrodes for wearable electronics. Additionally, the Ag composites were explored for use in a radio-frequency (RF) stretchable antenna to confirm the application of the laser-sintering method for stretchable and wearable electronic devices. The stretchable dipole antenna showed an excellent radiation efficiency of 95% and a highly stable operation, even when stretched to 90% strain. |
| Databáze: | OpenAIRE |
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