Radiation sensor based on a 1D-periodic structure infiltrated by (B-co-MP) a conjugated copolymer

• Published in: Scientific reports Vol. 14; no. 1; pp. 19829 - 12
• Main Authors: El-Shemy, Shimaa, Semeda, R, Mobarak, M, Eissa, M F, Sayed, Fatma A, Alshomrany, Ali S, Aly, Arafa H
• Format: Journal Article
• Language: English
• Published: England Nature Publishing Group 27.08.2024; Nature Publishing Group UK; Nature Portfolio
• Subjects: Composite materials; Conjugated copolymers; Gamma rays; Gamma-ray radiation; Glass substrates; Investigations; Molecular weight; Optical properties; Photonic crystals; Polymers; Porosity; Porous silicon; Radiation; Sensors; Silicon; Transfer matrix method; Transmittance spectra; Wavelengths; Conjugated copolymers; Transfer matrix method; Transmittance spectra; Porous silicon; Photonic crystals; Gamma-ray radiation
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-024-65312-w

In this study, a novel gamma-ray radiation sensor has been developed depending on a 1D photonic crystal (1D-PhC). Based on porous silicon (PSi) layer that has been penetrated by a conjugated copolymer (B-co-MP) which consists of BEHP-PPV and MEH-PPV, with a fractional ratio of 60:40. The suggested method for the development of the dosimeter is based on the shift of photonic band-gap to shorter wavelengths, where exposure to gamma-ray radiation at doses ranging from 0 to 20 kGy alters the refractive index of the (B-co-MP) copolymer. The fitted experimental data, the equation of Bruggeman effective medium, and the transfer matrix method (TMM) are the main axes in the framework of the current theoretical approach. The collected data shows that, within the visible range, the suggested sensor's sensitivity (224 nm/RIU) is high and stable over a 0-20 kGy applied-dose range. Also, we compared these results with previous research.