From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics

Single phase CeO(2) nanocrystals were bio-synthesized using Hoodia gordonii natural extract as an effective chelating agent. The nanocrystals with an average diameter of 〈Ø〉 ~ 5–26 nm with 4(+) electronic valence of Ce displayed a remarkable UV selectivity and an exceptional photostability. The diff...

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Autores principales: Ditlopo, N., Sintwa, N., Khamlich, S., Manikandan, E., Gnanasekaran, K., Henini, M., Gibaud, A., Krief, A., Maaza, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8891367/
https://www.ncbi.nlm.nih.gov/pubmed/35236882
http://dx.doi.org/10.1038/s41598-022-06828-x
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author Ditlopo, N.
Sintwa, N.
Khamlich, S.
Manikandan, E.
Gnanasekaran, K.
Henini, M.
Gibaud, A.
Krief, A.
Maaza, M.
author_facet Ditlopo, N.
Sintwa, N.
Khamlich, S.
Manikandan, E.
Gnanasekaran, K.
Henini, M.
Gibaud, A.
Krief, A.
Maaza, M.
author_sort Ditlopo, N.
collection PubMed
description Single phase CeO(2) nanocrystals were bio-synthesized using Hoodia gordonii natural extract as an effective chelating agent. The nanocrystals with an average diameter of 〈Ø〉 ~ 5–26 nm with 4(+) electronic valence of Ce displayed a remarkable UV selectivity and an exceptional photostability. The diffuse reflectivity profile of such CeO(2) exhibited a unique UV selectivity, in a form of a Heaviside function-like type profile in the solar spectrum. While the UV reflectivity is significantly low; within the range of 0.7%, it reaches 63% in the VIS and NIR. Their relative Reactive Oxygen Species (ROS) production was found to be < 1 within a wide range of concentration (0.5–1000 μg/ml). This exceptional photostability conjugated to a sound UV selectivity opens a potential horizon to a novel family of green nano-cosmetics by green nano-processing.
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spelling pubmed-88913672022-03-07 From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics Ditlopo, N. Sintwa, N. Khamlich, S. Manikandan, E. Gnanasekaran, K. Henini, M. Gibaud, A. Krief, A. Maaza, M. Sci Rep Article Single phase CeO(2) nanocrystals were bio-synthesized using Hoodia gordonii natural extract as an effective chelating agent. The nanocrystals with an average diameter of 〈Ø〉 ~ 5–26 nm with 4(+) electronic valence of Ce displayed a remarkable UV selectivity and an exceptional photostability. The diffuse reflectivity profile of such CeO(2) exhibited a unique UV selectivity, in a form of a Heaviside function-like type profile in the solar spectrum. While the UV reflectivity is significantly low; within the range of 0.7%, it reaches 63% in the VIS and NIR. Their relative Reactive Oxygen Species (ROS) production was found to be < 1 within a wide range of concentration (0.5–1000 μg/ml). This exceptional photostability conjugated to a sound UV selectivity opens a potential horizon to a novel family of green nano-cosmetics by green nano-processing. Nature Publishing Group UK 2022-03-02 /pmc/articles/PMC8891367/ /pubmed/35236882 http://dx.doi.org/10.1038/s41598-022-06828-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ditlopo, N.
Sintwa, N.
Khamlich, S.
Manikandan, E.
Gnanasekaran, K.
Henini, M.
Gibaud, A.
Krief, A.
Maaza, M.
From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title_full From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title_fullStr From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title_full_unstemmed From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title_short From Khoi-San indigenous knowledge to bioengineered CeO(2) nanocrystals to exceptional UV-blocking green nanocosmetics
title_sort from khoi-san indigenous knowledge to bioengineered ceo(2) nanocrystals to exceptional uv-blocking green nanocosmetics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8891367/
https://www.ncbi.nlm.nih.gov/pubmed/35236882
http://dx.doi.org/10.1038/s41598-022-06828-x
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