Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair

Abstract Preliminary study has been made of black human hair, carbon concentration of some 53%, a model in examining the potential of hair of the human head in retrospective and emergency biodosimetry applications, also offering effective atomic number near to that of water. The hair samples were ex...

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Autores principales:	Siok Ee Lam, Siti Nurasiah Mat Nawi, Siti Fairus Abdul Sani, Mayeen Uddin Khandaker, David Andrew Bradley
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/51fef80ddb2d4513bf0bbb6bea65fe06
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spelling	oai:doaj.org-article:51fef80ddb2d4513bf0bbb6bea65fe062021-12-02T14:30:46ZRaman and photoluminescence spectroscopy analysis of gamma irradiated human hair10.1038/s41598-021-86942-42045-2322https://doaj.org/article/51fef80ddb2d4513bf0bbb6bea65fe062021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86942-4https://doaj.org/toc/2045-2322Abstract Preliminary study has been made of black human hair, carbon concentration of some 53%, a model in examining the potential of hair of the human head in retrospective and emergency biodosimetry applications, also offering effective atomic number near to that of water. The hair samples were exposed to $$^{60}$$ 60 Co gamma rays, delivering doses from 0 to 200 Gy. Structural alterations were observed, use being made of Raman and photoluminescence (PL) spectroscopy. Most prominent among the features observed in the first-order Raman spectra are the D and G peaks, appearing at 1370 $${{\pm }} 18\,{\hbox {cm}}^{-1}$$ ± 18 cm - 1 and 1589 $${{\pm }} 11\,{\hbox {cm}}^{-1}$$ ± 11 cm - 1 respectively, the intensity ratio $${{{I}}}_{{{D}}}{{/}}{{{I}}}_{{{G}}}$$ I D / I G indicating dose-dependent defects generation and annealing of structural alterations. The wavelengths of the PL absorption and emission peaks are found to be centred at $$592.3 \pm 12.5$$ 592.3 ± 12.5 nm and $$1077.4 \pm 7.3$$ 1077.4 ± 7.3 nm, respectively. The hair samples mean band gap energy ( $${{{E}}}_{{{g}}}$$ E g ) post-irradiation was found to be $$2.10 \pm 0.04$$ 2.10 ± 0.04 eV, of the order of a semiconductor and approximately two times the $${{{E}}}_{{{g}}}$$ E g of other carbon-rich materials reported via the same methodology.Siok Ee LamSiti Nurasiah Mat NawiSiti Fairus Abdul SaniMayeen Uddin KhandakerDavid Andrew BradleyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Siok Ee Lam Siti Nurasiah Mat Nawi Siti Fairus Abdul Sani Mayeen Uddin Khandaker David Andrew Bradley Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
description	Abstract Preliminary study has been made of black human hair, carbon concentration of some 53%, a model in examining the potential of hair of the human head in retrospective and emergency biodosimetry applications, also offering effective atomic number near to that of water. The hair samples were exposed to $$^{60}$$ 60 Co gamma rays, delivering doses from 0 to 200 Gy. Structural alterations were observed, use being made of Raman and photoluminescence (PL) spectroscopy. Most prominent among the features observed in the first-order Raman spectra are the D and G peaks, appearing at 1370 $${{\pm }} 18\,{\hbox {cm}}^{-1}$$ ± 18 cm - 1 and 1589 $${{\pm }} 11\,{\hbox {cm}}^{-1}$$ ± 11 cm - 1 respectively, the intensity ratio $${{{I}}}_{{{D}}}{{/}}{{{I}}}_{{{G}}}$$ I D / I G indicating dose-dependent defects generation and annealing of structural alterations. The wavelengths of the PL absorption and emission peaks are found to be centred at $$592.3 \pm 12.5$$ 592.3 ± 12.5 nm and $$1077.4 \pm 7.3$$ 1077.4 ± 7.3 nm, respectively. The hair samples mean band gap energy ( $${{{E}}}_{{{g}}}$$ E g ) post-irradiation was found to be $$2.10 \pm 0.04$$ 2.10 ± 0.04 eV, of the order of a semiconductor and approximately two times the $${{{E}}}_{{{g}}}$$ E g of other carbon-rich materials reported via the same methodology.
format	article
author	Siok Ee Lam Siti Nurasiah Mat Nawi Siti Fairus Abdul Sani Mayeen Uddin Khandaker David Andrew Bradley
author_facet	Siok Ee Lam Siti Nurasiah Mat Nawi Siti Fairus Abdul Sani Mayeen Uddin Khandaker David Andrew Bradley
author_sort	Siok Ee Lam
title	Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
title_short	Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
title_full	Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
title_fullStr	Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
title_full_unstemmed	Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
title_sort	raman and photoluminescence spectroscopy analysis of gamma irradiated human hair
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/51fef80ddb2d4513bf0bbb6bea65fe06
work_keys_str_mv	AT siokeelam ramanandphotoluminescencespectroscopyanalysisofgammairradiatedhumanhair AT sitinurasiahmatnawi ramanandphotoluminescencespectroscopyanalysisofgammairradiatedhumanhair AT sitifairusabdulsani ramanandphotoluminescencespectroscopyanalysisofgammairradiatedhumanhair AT mayeenuddinkhandaker ramanandphotoluminescencespectroscopyanalysisofgammairradiatedhumanhair AT davidandrewbradley ramanandphotoluminescencespectroscopyanalysisofgammairradiatedhumanhair
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Raman and photoluminescence spectroscopy analysis of gamma irradiated human hair

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