Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/6578 |
Resumo: | Recently, the studies in the area of hybrid materials composed by biological structures have been of great interest, since they are considered versatile biotemplates in wich referred to the organization of nanostructured functional materials, mainly aiming technological attributions. Therefore, the central objective of this Master s Dissertation was the construction of microtubules formed by multilayers combined of gold and silver nanoparticles using as biotemplates the fungus Aspergillus aculeatus, which originated, thus, stable hybrid mesostructures with high potential of application to sensors and biosensors. The fungus was cultivated in a rich environment of citrate and, after the development of the hyphae, the colloidal dispersion of nanoparticles was added. Studies were done with relation to the effect of the synthesis temperature and the concentration of citrate in the average size of the gold nanoparticles and, posteriorly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectroscopy of absorption in the UVVis region. The formation of multilayer composed by different metal nanoparticles was evaluated too. The hybrid materials were characterized by scanning electron microscopy with microanalysis by EDX (SEM-EDS). The obtained results showed that the either concentration of citrate or the temperature directly affect the average size of the gold nanoparticles with expressive results to the temperature. In which referred the formation of the microtubules with different metal nanoparticles, three distinct regions were identified, namely, containing just gold nanoparticles, containing gold and silver nanoparticles and containing just silver nanoparticles, fact discussed in this Master s Dissertation by the differentiation of hyphae growth inside the colloidal dispersion. |
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Kubo, Andressa MayumiCamargo, Emerson Rodrigues dehttp://lattes.cnpq.br/7720754304065239http://lattes.cnpq.br/61906289778258594ac57426-e9e8-4991-a8ab-8aeede75ceca2016-06-02T20:36:49Z2014-02-262016-06-02T20:36:49Z2014-02-14https://repositorio.ufscar.br/handle/ufscar/6578Recently, the studies in the area of hybrid materials composed by biological structures have been of great interest, since they are considered versatile biotemplates in wich referred to the organization of nanostructured functional materials, mainly aiming technological attributions. Therefore, the central objective of this Master s Dissertation was the construction of microtubules formed by multilayers combined of gold and silver nanoparticles using as biotemplates the fungus Aspergillus aculeatus, which originated, thus, stable hybrid mesostructures with high potential of application to sensors and biosensors. The fungus was cultivated in a rich environment of citrate and, after the development of the hyphae, the colloidal dispersion of nanoparticles was added. Studies were done with relation to the effect of the synthesis temperature and the concentration of citrate in the average size of the gold nanoparticles and, posteriorly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectroscopy of absorption in the UVVis region. The formation of multilayer composed by different metal nanoparticles was evaluated too. The hybrid materials were characterized by scanning electron microscopy with microanalysis by EDX (SEM-EDS). The obtained results showed that the either concentration of citrate or the temperature directly affect the average size of the gold nanoparticles with expressive results to the temperature. In which referred the formation of the microtubules with different metal nanoparticles, three distinct regions were identified, namely, containing just gold nanoparticles, containing gold and silver nanoparticles and containing just silver nanoparticles, fact discussed in this Master s Dissertation by the differentiation of hyphae growth inside the colloidal dispersion.Recentemente, os estudos na área de materiais híbridos compostos de estruturas biológicas têm sido de grande interesse, uma vez que são considerados biotemplates versáteis no que se refere à organização de materiais funcionais nanoestruturados, principalmente visando atribuições tecnológicas. Assim, o objetivo desta dissertação de Mestrado foi a construção de microtubos formados por multicamadas combinadas de nanopartículas de ouro e de prata utilizando como biotemplate o fungo Aspergillus aculeatus, originando, portanto, mesoestruturas híbridas estáveis com alto potencial de aplicação a sensores e biossensores. O fungo foi cultivado em um ambiente rico em citrato e após o desenvolvimento das hifas, foi adicionada a dispersão coloidal de nanopartículas. Foram feitos estudos com relação ao efeito da temperatura de síntese e da concentração de citrato no tamanho médio das nanopartículas de ouro, e posteriormente caracterizados por difração de raios X (DRX), microscopia eletrônica de varredura (MEV) e espectroscopia de absorção na região do UV-visível. Também, foi avaliada a formação de multicamadas compostas de diferentes nanopartículas metálicas. Os materiais híbridos foram caracterizados por microscopia eletrônica de varredura com microanálise por EDS (MEV- EDS). Os resultados obtidos mostraram que tanto a concentração de citrato quanto a temperatura afetam diretamente o tamanho das nanopartículas com resultados expressivos para a temperatura. No que tange a formação de microtubos com diferentes nanopartículas metálicas, três distintas regiões foram identificadas, a saber, contendo somente nanopartículas de ouro, contendo nanopartículas de ouro e de prata e contendo somente nanopartículas de prata, fato discutido nessa Dissertação de Mestrado pela diferenciação de crescimento das hifas dentro da dispersão coloidal.Universidade Federal de Minas Geraisapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarBRFísico-químicaBiotemplatesNanopartículas metálicasFungos filamentososMulticamadas metálicasCIENCIAS EXATAS E DA TERRA::QUIMICAUso de biotemplates na obtenção de microtubos com nanopartículas de ouroUse of the biotemplates to obtain microtubules with gold nanoparticlesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-15082eee2-7a17-49c1-9a15-2a479b52df0finfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL5727.pdfapplication/pdf2828678https://repositorio.ufscar.br/bitstream/ufscar/6578/1/5727.pdf885d69e6ec03d3b4f41caf8cc2b8b382MD51TEXT5727.pdf.txt5727.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/6578/4/5727.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD54THUMBNAIL5727.pdf.jpg5727.pdf.jpgIM Thumbnailimage/jpeg9036https://repositorio.ufscar.br/bitstream/ufscar/6578/5/5727.pdf.jpg99a93dc8c37b5e4e43d354fddf4bc759MD55ufscar/65782023-09-18 18:30:40.424oai:repositorio.ufscar.br:ufscar/6578Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:40Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
dc.title.alternative.eng.fl_str_mv |
Use of the biotemplates to obtain microtubules with gold nanoparticles |
title |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
spellingShingle |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro Kubo, Andressa Mayumi Físico-química Biotemplates Nanopartículas metálicas Fungos filamentosos Multicamadas metálicas CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
title_full |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
title_fullStr |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
title_full_unstemmed |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
title_sort |
Uso de biotemplates na obtenção de microtubos com nanopartículas de ouro |
author |
Kubo, Andressa Mayumi |
author_facet |
Kubo, Andressa Mayumi |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/6190628977825859 |
dc.contributor.author.fl_str_mv |
Kubo, Andressa Mayumi |
dc.contributor.advisor1.fl_str_mv |
Camargo, Emerson Rodrigues de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7720754304065239 |
dc.contributor.authorID.fl_str_mv |
4ac57426-e9e8-4991-a8ab-8aeede75ceca |
contributor_str_mv |
Camargo, Emerson Rodrigues de |
dc.subject.por.fl_str_mv |
Físico-química Biotemplates Nanopartículas metálicas Fungos filamentosos Multicamadas metálicas |
topic |
Físico-química Biotemplates Nanopartículas metálicas Fungos filamentosos Multicamadas metálicas CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
Recently, the studies in the area of hybrid materials composed by biological structures have been of great interest, since they are considered versatile biotemplates in wich referred to the organization of nanostructured functional materials, mainly aiming technological attributions. Therefore, the central objective of this Master s Dissertation was the construction of microtubules formed by multilayers combined of gold and silver nanoparticles using as biotemplates the fungus Aspergillus aculeatus, which originated, thus, stable hybrid mesostructures with high potential of application to sensors and biosensors. The fungus was cultivated in a rich environment of citrate and, after the development of the hyphae, the colloidal dispersion of nanoparticles was added. Studies were done with relation to the effect of the synthesis temperature and the concentration of citrate in the average size of the gold nanoparticles and, posteriorly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectroscopy of absorption in the UVVis region. The formation of multilayer composed by different metal nanoparticles was evaluated too. The hybrid materials were characterized by scanning electron microscopy with microanalysis by EDX (SEM-EDS). The obtained results showed that the either concentration of citrate or the temperature directly affect the average size of the gold nanoparticles with expressive results to the temperature. In which referred the formation of the microtubules with different metal nanoparticles, three distinct regions were identified, namely, containing just gold nanoparticles, containing gold and silver nanoparticles and containing just silver nanoparticles, fact discussed in this Master s Dissertation by the differentiation of hyphae growth inside the colloidal dispersion. |
publishDate |
2014 |
dc.date.available.fl_str_mv |
2014-02-26 2016-06-02T20:36:49Z |
dc.date.issued.fl_str_mv |
2014-02-14 |
dc.date.accessioned.fl_str_mv |
2016-06-02T20:36:49Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
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https://repositorio.ufscar.br/handle/ufscar/6578 |
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https://repositorio.ufscar.br/handle/ufscar/6578 |
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por |
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-1 -1 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Química - PPGQ |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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