Realisation of a biocompatible diffraction grating using an ArF excimer laser

Aesa, Abdulsattar A.; Walton, C. D.

Abstract

We report the fabrication of a bio-compatible diffraction grating made out chitosan, a derivative of chitin. The diffraction grating has been realised by laser ablation using 193 nm excimer laser. Thin spun coated chitosan films 520 nm thick were used in the laser ablation experiments. We report a laser ablation threshold for chitosan of FT = 85 8 mJcm-2. A clean laser ablation process is observed with very little material redeposited on the sample. Following equipment; white light interferometry, scanning electron microscopy, power spectral density and Fraunhofer diffraction measurements were utilized to characterise the diffraction grating. Calculation of the temperature rise induced during laser ablation has been carried out and compared with decomposition temperatures deduced from thermogravimetric data. Applications of bio-compatible gratings realised by laser direct write patterning are briefly discussed.

Citation

Aesa, A. A., & Walton, C. D. Realisation of a biocompatible diffraction grating using an ArF excimer laser. Presented at First International Conference of Pure and Engineering Sciences (ICPES2020), Karbala, Iraq

• Presentation Conference Type: Conference Paper (published)
• Conference Name: First International Conference of Pure and Engineering Sciences (ICPES2020)
• Acceptance Date: May 22, 2020
• Online Publication Date: Jun 17, 2020
• Publication Date: 2020
• Deposit Date: Aug 11, 2020
• Publicly Available Date: Aug 12, 2020
• Journal: IOP Conference Series: Materials Science and Engineering
• Print ISSN: 1757-899X
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 871
• Issue: 1
• Article Number: 012058
• DOI: https://doi.org/10.1088/1757-899X/871/1/012058
• Keywords: Diffraction grating; Excimer laser; Laser ablation; Chitosan
• Public URL: https://hull-repository.worktribe.com/output/3557088