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1 April 2022 Laser-based direct synthesis and patterning of graphene quantum dots
Shuichiro Hayashi, Kaneto Tsunemitsu, Mitsuhiro Terakawa
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Proceedings Volume PC11990, Nanoscale and Quantum Materials: From Synthesis and Laser Processing to Applications 2022; PC119900F (2022) https://doi.org/10.1117/12.2625670
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
We report the simultaneous synthesis and patterning of graphene quantum dots (GQDs) on and inside a transparent polymer, polydimethylsiloxane (PDMS), using a femtosecond laser. The irradiation of high repetition femtosecond laser pulses induces the formation of GQDs, which is attributable to the laser-induced pyrolysis of graphitic carbon sheets and/or silicon carbide nanocrystals. Furthermore, the patterning of a two-dimensional security tag with a concealed QR code, and a fluorescent three-dimensional design is demonstrated by adjusting the laser irradiation conditions. This work expands the possibilities of GQDs for applications in novel flexible three-dimensional optoelectrical devices.
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Shuichiro Hayashi, Kaneto Tsunemitsu, and Mitsuhiro Terakawa "Laser-based direct synthesis and patterning of graphene quantum dots", Proc. SPIE PC11990, Nanoscale and Quantum Materials: From Synthesis and Laser Processing to Applications 2022, PC119900F (1 April 2022); https://doi.org/10.1117/12.2625670
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KEYWORDS
Optical lithography
Quantum dots
Graphene
Nanocrystals
Optoelectronic devices
Transmission electron microscopy
Femtosecond phenomena
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