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Realisation of a biocompatible diffraction grating using an ArF excimer laser

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


Abdulsattar A. Aesa

C. D. Walton


Chris Walton


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.


Aesa, A. A., & Walton, C. D. (2020). Realisation of a biocompatible diffraction grating using an ArF excimer laser. IOP Conference Series: Materials Science and Engineering, 871(1), Article 012058.

Journal Article Type Conference Paper
Conference Name First International Conference of Pure and Engineering Sciences (ICPES2020)
Conference Location Karbala, Iraq
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
Electronic ISSN 1757-899X
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 871
Issue 1
Article Number 012058
Keywords Diffraction grating; Excimer laser; Laser ablation; Chitosan
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