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Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions

The irradiance of ultraviolet (UV) radiation is a physical parameter that significantly influences biological molecules by affecting their molecular structure. The influence of UV radiation on nanoparticles has not been investigated much. In this work, the ability of cadmium telluride quantum dots (...

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Autores principales: Hosnedlova, Bozena, Vsetickova, Michaela, Stankova, Martina, Uhlirova, Dagmar, Ruttkay-Nedecky, Branislav, Ofomaja, Augustine, Fernandez, Carlos, Kepinska, Marta, Baron, Mojmir, Ngoc, Bach Duong, Nguyen, Hoai Viet, Thu, Ha Pham Thi, Sochor, Jiri, Kizek, Rene
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279304/
https://www.ncbi.nlm.nih.gov/pubmed/32365860
http://dx.doi.org/10.3390/nano10050865
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author Hosnedlova, Bozena
Vsetickova, Michaela
Stankova, Martina
Uhlirova, Dagmar
Ruttkay-Nedecky, Branislav
Ofomaja, Augustine
Fernandez, Carlos
Kepinska, Marta
Baron, Mojmir
Ngoc, Bach Duong
Nguyen, Hoai Viet
Thu, Ha Pham Thi
Sochor, Jiri
Kizek, Rene
author_facet Hosnedlova, Bozena
Vsetickova, Michaela
Stankova, Martina
Uhlirova, Dagmar
Ruttkay-Nedecky, Branislav
Ofomaja, Augustine
Fernandez, Carlos
Kepinska, Marta
Baron, Mojmir
Ngoc, Bach Duong
Nguyen, Hoai Viet
Thu, Ha Pham Thi
Sochor, Jiri
Kizek, Rene
author_sort Hosnedlova, Bozena
collection PubMed
description The irradiance of ultraviolet (UV) radiation is a physical parameter that significantly influences biological molecules by affecting their molecular structure. The influence of UV radiation on nanoparticles has not been investigated much. In this work, the ability of cadmium telluride quantum dots (CdTe QDs) to respond to natural UV radiation was examined. The average size of the yellow QDs was 4 nm, and the sizes of green, red and orange QDs were 2 nm. Quantum yield of green CdTe QDs-MSA (mercaptosuccinic acid)-A, yellow CdTe QDs-MSA-B, orange CdTe QDs-MSA-C and red CdTe QDs-MSA-D were 23.0%, 16.0%, 18.0% and 7.0%, respectively. Green, yellow, orange and red CdTe QDs were replaced every day and exposed to daily UV radiation for 12 h for seven consecutive days in summer with UV index signal integration ranging from 1894 to 2970. The rising dose of UV radiation led to the release of cadmium ions and the change in the size of individual QDs. The shifts were evident in absorption signals (shifts of the absorbance maxima of individual CdTe QDs-MSA were in the range of 6–79 nm), sulfhydryl (SH)-group signals (after UV exposure, the largest changes in the differential signal of the SH groups were observed in the orange, green, and yellow QDs, while in red QDs, there were almost no changes), fluorescence, and electrochemical signals. Yellow, orange and green QDs showed a stronger response to UV radiation than red ones.
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spelling pubmed-72793042020-06-17 Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions Hosnedlova, Bozena Vsetickova, Michaela Stankova, Martina Uhlirova, Dagmar Ruttkay-Nedecky, Branislav Ofomaja, Augustine Fernandez, Carlos Kepinska, Marta Baron, Mojmir Ngoc, Bach Duong Nguyen, Hoai Viet Thu, Ha Pham Thi Sochor, Jiri Kizek, Rene Nanomaterials (Basel) Article The irradiance of ultraviolet (UV) radiation is a physical parameter that significantly influences biological molecules by affecting their molecular structure. The influence of UV radiation on nanoparticles has not been investigated much. In this work, the ability of cadmium telluride quantum dots (CdTe QDs) to respond to natural UV radiation was examined. The average size of the yellow QDs was 4 nm, and the sizes of green, red and orange QDs were 2 nm. Quantum yield of green CdTe QDs-MSA (mercaptosuccinic acid)-A, yellow CdTe QDs-MSA-B, orange CdTe QDs-MSA-C and red CdTe QDs-MSA-D were 23.0%, 16.0%, 18.0% and 7.0%, respectively. Green, yellow, orange and red CdTe QDs were replaced every day and exposed to daily UV radiation for 12 h for seven consecutive days in summer with UV index signal integration ranging from 1894 to 2970. The rising dose of UV radiation led to the release of cadmium ions and the change in the size of individual QDs. The shifts were evident in absorption signals (shifts of the absorbance maxima of individual CdTe QDs-MSA were in the range of 6–79 nm), sulfhydryl (SH)-group signals (after UV exposure, the largest changes in the differential signal of the SH groups were observed in the orange, green, and yellow QDs, while in red QDs, there were almost no changes), fluorescence, and electrochemical signals. Yellow, orange and green QDs showed a stronger response to UV radiation than red ones. MDPI 2020-04-30 /pmc/articles/PMC7279304/ /pubmed/32365860 http://dx.doi.org/10.3390/nano10050865 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hosnedlova, Bozena
Vsetickova, Michaela
Stankova, Martina
Uhlirova, Dagmar
Ruttkay-Nedecky, Branislav
Ofomaja, Augustine
Fernandez, Carlos
Kepinska, Marta
Baron, Mojmir
Ngoc, Bach Duong
Nguyen, Hoai Viet
Thu, Ha Pham Thi
Sochor, Jiri
Kizek, Rene
Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title_full Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title_fullStr Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title_full_unstemmed Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title_short Study of Physico-Chemical Changes of CdTe QDs after Their Exposure to Environmental Conditions
title_sort study of physico-chemical changes of cdte qds after their exposure to environmental conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279304/
https://www.ncbi.nlm.nih.gov/pubmed/32365860
http://dx.doi.org/10.3390/nano10050865
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