Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2020 |
| Outros Autores: | , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | http://hdl.handle.net/10362/119512 |
Resumo: | Project No. 230710387 PD/00193/2012 UIDB/04378/2020 UIDB/00068/2020 SFRH/BD/106032/2015 |
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Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case studyPhysics and Astronomy(all)Physical and Theoretical ChemistrySDG 3 - Good Health and Well-beingProject No. 230710387 PD/00193/2012 UIDB/04378/2020 UIDB/00068/2020 SFRH/BD/106032/2015Laser illuminated gold nanoparticles (AuNPs) efficiently absorb light and heat up the surrounding medium, leading to versatile applications ranging from plasmonic catalysis to cancer photothermal therapy. Therefore, an in-depth understanding of the thermal, optical, and electron induced reaction pathways is required. Here, the electrophilic DNA nucleobase analog 5-Bromouracil (BrU) has been used as a model compound to study its decomposition in the vicinity of AuNPs illuminated with intense ns laser pulses under various conditions. The plasmonic response of the AuNPs and the concentration of BrU and resulting photoproducts have been tracked by ultraviolet and visible (UV-Vis) spectroscopy as a function of the irradiation time. A kinetic model has been developed to determine the reaction rates of two parallel fragmentation pathways of BrU, and their dependency on laser fluence and adsorption on the AuNP have been evaluated. In addition, the size and the electric field enhancement of the decomposed AuNPs have been determined by atomic force microscopy and finite domain time difference calculations, respectively. A minor influence of the direct photoreaction and a strong effect of the heating of the AuNPs have been revealed. However, due to the size reduction of the irradiated AuNPs, a trade-off between laser fluence and plasmonic response of the AuNPs has been observed. Hence, the decomposition of the AuNPs might be limiting the achievable temperatures under irradiation with several laser pulses. These findings need to be considered for an efficient design of catalytic plasmonic systems.CeFITec – Centro de Física e Investigação TecnológicaDF – Departamento de FísicaRUNMarques, Telma S.Schürmann, RobinEbel, KennyHeck, ChristianŚmiałek, Małgorzata A.Eden, SamMason, NigelBald, Ilko2021-06-17T22:20:44Z2020-03-312020-03-31T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/119512eng0021-9606PURE: 32025737https://doi.org/10.1063/1.5137898info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:02:06Zoai:run.unl.pt:10362/119512Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:44:06.635902Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
| dc.title.none.fl_str_mv |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| title |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| spellingShingle |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study Marques, Telma S. Physics and Astronomy(all) Physical and Theoretical Chemistry SDG 3 - Good Health and Well-being |
| title_short |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| title_full |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| title_fullStr |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| title_full_unstemmed |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| title_sort |
Kinetics of molecular decomposition under irradiation of gold nanoparticles with nanosecond laser pulses-A 5-Bromouracil case study |
| author |
Marques, Telma S. |
| author_facet |
Marques, Telma S. Schürmann, Robin Ebel, Kenny Heck, Christian Śmiałek, Małgorzata A. Eden, Sam Mason, Nigel Bald, Ilko |
| author_role |
author |
| author2 |
Schürmann, Robin Ebel, Kenny Heck, Christian Śmiałek, Małgorzata A. Eden, Sam Mason, Nigel Bald, Ilko |
| author2_role |
author author author author author author author |
| dc.contributor.none.fl_str_mv |
CeFITec – Centro de Física e Investigação Tecnológica DF – Departamento de Física RUN |
| dc.contributor.author.fl_str_mv |
Marques, Telma S. Schürmann, Robin Ebel, Kenny Heck, Christian Śmiałek, Małgorzata A. Eden, Sam Mason, Nigel Bald, Ilko |
| dc.subject.por.fl_str_mv |
Physics and Astronomy(all) Physical and Theoretical Chemistry SDG 3 - Good Health and Well-being |
| topic |
Physics and Astronomy(all) Physical and Theoretical Chemistry SDG 3 - Good Health and Well-being |
| description |
Project No. 230710387 PD/00193/2012 UIDB/04378/2020 UIDB/00068/2020 SFRH/BD/106032/2015 |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020-03-31 2020-03-31T00:00:00Z 2021-06-17T22:20:44Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/119512 |
| url |
http://hdl.handle.net/10362/119512 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
0021-9606 PURE: 32025737 https://doi.org/10.1063/1.5137898 |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799138049158807552 |