About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Printed Electronics and Additive Manufacturing: Functional Materials, Processing Techniques, and Emerging Applications
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Presentation Title |
Miniaturizing Direct-write of Porous Graphene Lines by Combining Fiber Laser-induced Carbonization with Photoinitiator Printing |
Author(s) |
Soumalya Ghosh, Moataz Abdulhafez, Mirza Sahaluddin, Mostafa Bedewy |
On-Site Speaker (Planned) |
Soumalya Ghosh |
Abstract Scope |
Fabrication of graphene directly on polymers is crucial for many applications of flexible electronics including sensors, supercapacitors, and biointerfaces. While printing methods can be used, they require the creation of inks followed by repeated printing steps and postprinting annealing. Hence, the one-step direct-write nature of laser-induced graphene (LIG) process makes it an attractive alternative. Nevertheless, most previous work on LIG relied on continuous-wave CO2 lasers, which are largely limited to 100s microns resolution. Here, we develop a new approach that leverages the smaller spot sizes possible in pulsed Fiber lasers. Importantly, the absorption of polyimide at the 1064 nm wavelength is dramatically reduced compared to CO2 laser, which inhibits graphene formation. To overcome this challenge, we introduce a step of photoinitiator printing prior to laser patterning. Our approach enables fabricating lines down to 40 micron width, which are promising for microelectrode arrays in flexible devices such as neural interfaces. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nanotechnology, Characterization, Electronic Materials |