Greifswald 2024 – scientific programme
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 4: Poster
K 4.1: Poster
Monday, February 26, 2024, 16:30–18:30, ELP 6: Foyer
Enhanced energy harvesting efficiency by Surface modification of PVDF/ZnS Composite Nanofibrous Membranes Using Femtosecond Pulses — •Nehal Ali1, Elham Mostafa2, and Amna Faid2 — 1Tanta University, Tanta, Egypt — 2Cairo University, Giza, Egypt
The surface modification competence of ceramic/polymer composite is significant for electronic device applications. We report the successful patterning of a micro-grating array on the surface of an electrospun PVDF/ZnS composite membrane by femtosecond (fs) laser to fabricate efficient energy harvesting devices. The femtosecond laser is considered a versatile, speedy, and flexible tool for surface modification of different materials.
The electrospinning technique was chosen to deliver nanofibers with high β-phase content in one step. The PVDF polymeric membrane was loaded with ZnS nanoparticles to enrich the β-phase content.
The effect of laser input fluence on the morphology of patterning the nanofibers was investigated. The results showed successful patterning of tracks on the surface of the fiber while preserving its nature. The capability of the membrane as an energy harvesting device was confirmed by measuring the maximum open circuit voltage density of 1.98 V*m*2 compared to the untreated membrane of a density of 1.49 V*m-2. This work has demonstrated possible applications in electronic devices, such as sensors and actuators, in biomedical fields, such as tissue engineering.
Keywords: PVDF nanofibers; Femtosecond laser; Energy Harvesting