Ultrafast damage dynamics and ablation mechanism of GaSe induced by femtosecond laser irradiation

Pan, Xiaoguang; Wang, Yongzheng; Bai, Hangxin; Ren, Caixia; Zhang, Weili; Wang, Jiaxin; Peng, Jiangbo; Jing, Fangli; Qiu, Hailong; Zhu, Chongqiang; Liu, H.; Yang, Chunhui; Hu, Zhanggui; Wu, Yicheng

doi:10.1016/j.apsusc.2023.157999

Cited by 3 publications

(1 citation statement)

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“…When energy exceeding the damage threshold is applied to PDMS using a femtosecond laser, parts or the entirety of the PDMS polymer chains undergo ablation. These electrons transfer energy to the lattice, resulting in the formation of a high-pressure and high-temperature plasma above the surface . These plasmas expanded and burst at the laser focal point, leading to ablated burrs acting as ribs in the fishbone-inspired structure.…”

Section: Resultsmentioning

confidence: 99%

Femtosecond-Laser-Assisted Fishbone-Inspired Patterning of Selective Liquid Metal Dewetted Electrodes for Flexible Electronics

Yu,

Cho,

Lee

et al. 2024

ACS Appl. Electron. Mater.

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Femtosecond-laser-induced selective fishbone-inspired and trapezoidal structures provide low surface energies for liquid metal (LM) and LM-phobic surfaces. This laser-based technique is suitable for processing heat-vulnerable flexible substrates and minimizing changes in their physical properties, which can be analyzed by Fourier-transform infrared spectroscopy. In this study, we developed a femtosecond-laser-assisted fishbone-inspired patterning process for a selective LM wettable surface on a flexible substrate. Because the ribs of the fishbone-inspired structure were developed between laser-ablated lines, the entire LM-phobic pattern was covered without processing the entire surface area. In the fishbone-inspired pattern, the region directly exposed to the femtosecond laser served as the "spines", while the burrs, which were a byproduct of laser processing, acted as the "ribs". A minimum line width of ∼40 μm was realized using this structural mechanism. The patterned LM-phobic surface exhibited low surface energy with a 156°contact angle for the LM material. The patterned LM on a flexible poly(dimethylsiloxane) substrate maintained a stable electrical connection with minimal deviations, even under bending, twisting, and stretching conditions. These processes and structures can be used to fabricate flexible, stretchable, and wearable electronic devices.

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Section: Resultsmentioning

confidence: 99%