Nanopartículas magnéticas: simulações para o regime superparamagnético

Detalhes bibliográficos
Ano de defesa: 2016
Autor(a) principal: Sampaio, Guilherme Moisés
Orientador(a): Brandl, Ana Lúcia lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Carlos
Câmpus Sorocaba
Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência dos Materiais - PPGCM-So
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Nanopartículas magnéticas
Supermagnetismo
Simulações
Magnetismo
Nanotecnologia
Palavras-chave em Inglês:
Magnetic nanoparticles
Supermagnetism
Simulations
Magnetism
Nanotechnology
Nanostructured materials
Área do conhecimento CNPq:
OUTROS
Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/8257
Resumo: The comprehension of the phenomena related to magnetism allowed advances in various fields of knowledge and several modern applications that are now part of our daily lives. Specifically, the magnetic nanoparticles (NPs) has aroused a great interest among researchers in recent decades. This curiosity due to its unique properties is due to its small size and surface interactions. One of the main physical phenomena that appear when we reduce the size of a magnetic particle is called superparamagnetism. In this work, we have looked for a description and understanding of the mathematical formalism attached to magnetic phenomena at nanoscale through the application of the Langevin’s function to magnetic NPs in superparamagnetic regime and non-interacting model. Accordingly, we use theoretical simulations of magnetization curves as a function of applied field to study some parameters and verify its compatibility with magnetic characterization data obtained for samples of NPs magnetite and maghemite. In this way, we can get relevant information to the analysis of the magnetic behavior of nanoparticulate systems. Finally, we have lunched the potential of these magnetic NPs in biomedical applications both in diagnostic techniques and in disease treatments.
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spelling Sampaio, Guilherme MoisésBrandl, Ana Lúciahttp://lattes.cnpq.br/3308757619164141http://lattes.cnpq.br/2434251534223251185c60d0-dedd-4b0e-bda1-b9bbf99314482016-11-03T17:26:28Z2016-11-03T17:26:28Z2016-05-20SAMPAIO, Guilherme Moisés. Nanopartículas magnéticas: simulações para o regime superparamagnético. 2016. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2016. Disponível em: https://repositorio.ufscar.br/handle/20.500.14289/8257.https://repositorio.ufscar.br/handle/20.500.14289/8257The comprehension of the phenomena related to magnetism allowed advances in various fields of knowledge and several modern applications that are now part of our daily lives. Specifically, the magnetic nanoparticles (NPs) has aroused a great interest among researchers in recent decades. This curiosity due to its unique properties is due to its small size and surface interactions. One of the main physical phenomena that appear when we reduce the size of a magnetic particle is called superparamagnetism. In this work, we have looked for a description and understanding of the mathematical formalism attached to magnetic phenomena at nanoscale through the application of the Langevin’s function to magnetic NPs in superparamagnetic regime and non-interacting model. Accordingly, we use theoretical simulations of magnetization curves as a function of applied field to study some parameters and verify its compatibility with magnetic characterization data obtained for samples of NPs magnetite and maghemite. In this way, we can get relevant information to the analysis of the magnetic behavior of nanoparticulate systems. Finally, we have lunched the potential of these magnetic NPs in biomedical applications both in diagnostic techniques and in disease treatments.A compreensão dos fenômenos ligados ao magnetismo permitiu avanços nas mais variadas áreas do conhecimento e diversas aplicações modernas que hoje fazem parte do nosso cotidiano. Especificamente, as nanopartículas (NPs) magnéticas têm despertado um grande interesse por parte dos pesquisadores nas últimas décadas. Essa curiosidade devido às suas propriedades diferenciadas é decorrente de suas dimensões reduzidas e de interações de superfície. Um dos principais fenômenos físicos que surgem ao se reduzir o tamanho de partículas magnéticas é o chamado superparamagnetismo. Neste trabalho, procuramos por uma descrição e entendimento do formalismo matemático ligado ao fenômeno magnético em nanoescala por meio da aplicação do modelo proposto por Langevin a NPs magnéticas em regime superparamagnético não-interagente. Nesse sentido, utilizamos de simulações teóricas de curvas de magnetização em função do campo aplicado a fim de estudar alguns parâmetros e verificar sua compatibilidade com dados de caracterização magnética obtidos para amostras de NPs de magnetita e maghemita. Desta forma, podemos obter informações relevantes para a análise do comportamento magnético desses sistemas nanoparticulados. Por fim, evidenciamos as potencialidades dessas NPs magnéticas nas aplicações biomédicas tanto em técnicas de diagnóstico quanto em tratamentos de doenças.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)porUniversidade Federal de São CarlosCâmpus SorocabaPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoUFSCarNanopartículas magnéticasSupermagnetismoSimulaçõesMagnetismoNanotecnologiaMagnetic nanoparticlesSupermagnetismSimulationsMagnetismNanotechnologyNanostructured materialsOUTROSNanopartículas magnéticas: simulações para o regime superparamagnéticoMagnetic nanoparticles: simulations for the superparamagnetic regimeinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline600600ab9bf64a-5f65-4c35-96c8-becf50eceee4info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALSAMPAIO_Guilherme_2016.pdfSAMPAIO_Guilherme_2016.pdfapplication/pdf12947275https://repositorio.ufscar.br/bitstreams/0b3d41b9-d59b-4442-93ed-6b079fccf8d8/downloade37468f50e4625a4fdc9875a5cf3f85fMD51trueAnonymousREADLICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstreams/3fbeea8a-7ba0-4964-b02c-0bb2568fe71a/downloadae0398b6f8b235e40ad82cba6c50031dMD52falseAnonymousREADTEXTSAMPAIO_Guilherme_2016.pdf.txtSAMPAIO_Guilherme_2016.pdf.txtExtracted texttext/plain192914https://repositorio.ufscar.br/bitstreams/d2de7607-9c86-4890-87c7-da997b58fe0a/download229b5e7f9abbac19eea329130eca2a97MD55falseAnonymousREADTHUMBNAILSAMPAIO_Guilherme_2016.pdf.jpgSAMPAIO_Guilherme_2016.pdf.jpgIM Thumbnailimage/jpeg4321https://repositorio.ufscar.br/bitstreams/4542c558-93a4-4d04-b74f-5e65c9518650/download2d0d442d532475596b4b3a66cab6c5caMD56falseAnonymousREAD20.500.14289/82572025-02-05 17:26:52.348Acesso abertoopen.accessoai:repositorio.ufscar.br:20.500.14289/8257https://repositorio.ufscar.brRepositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestrepositorio.sibi@ufscar.bropendoar:43222025-02-05T20:26:52Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)falseTElDRU7Dh0EgREUgRElTVFJJQlVJw4fDg08gTsODTy1FWENMVVNJVkEKCkNvbSBhIGFwcmVzZW50YcOnw6NvIGRlc3RhIGxpY2Vuw6dhLCB2b2PDqiAobyBhdXRvciAoZXMpIG91IG8gdGl0dWxhciBkb3MgZGlyZWl0b3MgZGUgYXV0b3IpIGNvbmNlZGUgw6AgVW5pdmVyc2lkYWRlCkZlZGVyYWwgZGUgU8OjbyBDYXJsb3MgbyBkaXJlaXRvIG7Do28tZXhjbHVzaXZvIGRlIHJlcHJvZHV6aXIsICB0cmFkdXppciAoY29uZm9ybWUgZGVmaW5pZG8gYWJhaXhvKSwgZS9vdQpkaXN0cmlidWlyIGEgc3VhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyAoaW5jbHVpbmRvIG8gcmVzdW1vKSBwb3IgdG9kbyBvIG11bmRvIG5vIGZvcm1hdG8gaW1wcmVzc28gZSBlbGV0csO0bmljbyBlCmVtIHF1YWxxdWVyIG1laW8sIGluY2x1aW5kbyBvcyBmb3JtYXRvcyDDoXVkaW8gb3UgdsOtZGVvLgoKVm9jw6ogY29uY29yZGEgcXVlIGEgVUZTQ2FyIHBvZGUsIHNlbSBhbHRlcmFyIG8gY29udGXDumRvLCB0cmFuc3BvciBhIHN1YSB0ZXNlIG91IGRpc3NlcnRhw6fDo28KcGFyYSBxdWFscXVlciBtZWlvIG91IGZvcm1hdG8gcGFyYSBmaW5zIGRlIHByZXNlcnZhw6fDo28uCgpWb2PDqiB0YW1iw6ltIGNvbmNvcmRhIHF1ZSBhIFVGU0NhciBwb2RlIG1hbnRlciBtYWlzIGRlIHVtYSBjw7NwaWEgYSBzdWEgdGVzZSBvdQpkaXNzZXJ0YcOnw6NvIHBhcmEgZmlucyBkZSBzZWd1cmFuw6dhLCBiYWNrLXVwIGUgcHJlc2VydmHDp8Ojby4KClZvY8OqIGRlY2xhcmEgcXVlIGEgc3VhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyDDqSBvcmlnaW5hbCBlIHF1ZSB2b2PDqiB0ZW0gbyBwb2RlciBkZSBjb25jZWRlciBvcyBkaXJlaXRvcyBjb250aWRvcwpuZXN0YSBsaWNlbsOnYS4gVm9jw6ogdGFtYsOpbSBkZWNsYXJhIHF1ZSBvIGRlcMOzc2l0byBkYSBzdWEgdGVzZSBvdSBkaXNzZXJ0YcOnw6NvIG7Do28sIHF1ZSBzZWphIGRlIHNldQpjb25oZWNpbWVudG8sIGluZnJpbmdlIGRpcmVpdG9zIGF1dG9yYWlzIGRlIG5pbmd1w6ltLgoKQ2FzbyBhIHN1YSB0ZXNlIG91IGRpc3NlcnRhw6fDo28gY29udGVuaGEgbWF0ZXJpYWwgcXVlIHZvY8OqIG7Do28gcG9zc3VpIGEgdGl0dWxhcmlkYWRlIGRvcyBkaXJlaXRvcyBhdXRvcmFpcywgdm9jw6oKZGVjbGFyYSBxdWUgb2J0ZXZlIGEgcGVybWlzc8OjbyBpcnJlc3RyaXRhIGRvIGRldGVudG9yIGRvcyBkaXJlaXRvcyBhdXRvcmFpcyBwYXJhIGNvbmNlZGVyIMOgIFVGU0NhcgpvcyBkaXJlaXRvcyBhcHJlc2VudGFkb3MgbmVzdGEgbGljZW7Dp2EsIGUgcXVlIGVzc2UgbWF0ZXJpYWwgZGUgcHJvcHJpZWRhZGUgZGUgdGVyY2Vpcm9zIGVzdMOhIGNsYXJhbWVudGUKaWRlbnRpZmljYWRvIGUgcmVjb25oZWNpZG8gbm8gdGV4dG8gb3Ugbm8gY29udGXDumRvIGRhIHRlc2Ugb3UgZGlzc2VydGHDp8OjbyBvcmEgZGVwb3NpdGFkYS4KCkNBU08gQSBURVNFIE9VIERJU1NFUlRBw4fDg08gT1JBIERFUE9TSVRBREEgVEVOSEEgU0lETyBSRVNVTFRBRE8gREUgVU0gUEFUUk9Dw41OSU8gT1UKQVBPSU8gREUgVU1BIEFHw4pOQ0lBIERFIEZPTUVOVE8gT1UgT1VUUk8gT1JHQU5JU01PIFFVRSBOw4NPIFNFSkEgQSBVRlNDYXIsClZPQ8OKIERFQ0xBUkEgUVVFIFJFU1BFSVRPVSBUT0RPUyBFIFFVQUlTUVVFUiBESVJFSVRPUyBERSBSRVZJU8ODTyBDT01PClRBTULDiU0gQVMgREVNQUlTIE9CUklHQcOHw5VFUyBFWElHSURBUyBQT1IgQ09OVFJBVE8gT1UgQUNPUkRPLgoKQSBVRlNDYXIgc2UgY29tcHJvbWV0ZSBhIGlkZW50aWZpY2FyIGNsYXJhbWVudGUgbyBzZXUgbm9tZSAocykgb3UgbyhzKSBub21lKHMpIGRvKHMpCmRldGVudG9yKGVzKSBkb3MgZGlyZWl0b3MgYXV0b3JhaXMgZGEgdGVzZSBvdSBkaXNzZXJ0YcOnw6NvLCBlIG7Do28gZmFyw6EgcXVhbHF1ZXIgYWx0ZXJhw6fDo28sIGFsw6ltIGRhcXVlbGFzCmNvbmNlZGlkYXMgcG9yIGVzdGEgbGljZW7Dp2EuCg==
dc.title.por.fl_str_mv Nanopartículas magnéticas: simulações para o regime superparamagnético
dc.title.alternative.eng.fl_str_mv Magnetic nanoparticles: simulations for the superparamagnetic regime
title Nanopartículas magnéticas: simulações para o regime superparamagnético
spellingShingle Nanopartículas magnéticas: simulações para o regime superparamagnético
Sampaio, Guilherme Moisés
Nanopartículas magnéticas
Supermagnetismo
Simulações
Magnetismo
Nanotecnologia
Magnetic nanoparticles
Supermagnetism
Simulations
Magnetism
Nanotechnology
Nanostructured materials
OUTROS
title_short Nanopartículas magnéticas: simulações para o regime superparamagnético
title_full Nanopartículas magnéticas: simulações para o regime superparamagnético
title_fullStr Nanopartículas magnéticas: simulações para o regime superparamagnético
title_full_unstemmed Nanopartículas magnéticas: simulações para o regime superparamagnético
title_sort Nanopartículas magnéticas: simulações para o regime superparamagnético
author Sampaio, Guilherme Moisés
author_facet Sampaio, Guilherme Moisés
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://lattes.cnpq.br/2434251534223251
dc.contributor.author.fl_str_mv Sampaio, Guilherme Moisés
dc.contributor.advisor1.fl_str_mv Brandl, Ana Lúcia
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/3308757619164141
dc.contributor.authorID.fl_str_mv 185c60d0-dedd-4b0e-bda1-b9bbf9931448
contributor_str_mv Brandl, Ana Lúcia
dc.subject.por.fl_str_mv Nanopartículas magnéticas
Supermagnetismo
Simulações
Magnetismo
Nanotecnologia
topic Nanopartículas magnéticas
Supermagnetismo
Simulações
Magnetismo
Nanotecnologia
Magnetic nanoparticles
Supermagnetism
Simulations
Magnetism
Nanotechnology
Nanostructured materials
OUTROS
dc.subject.eng.fl_str_mv Magnetic nanoparticles
Supermagnetism
Simulations
Magnetism
Nanotechnology
Nanostructured materials
dc.subject.cnpq.fl_str_mv OUTROS
description The comprehension of the phenomena related to magnetism allowed advances in various fields of knowledge and several modern applications that are now part of our daily lives. Specifically, the magnetic nanoparticles (NPs) has aroused a great interest among researchers in recent decades. This curiosity due to its unique properties is due to its small size and surface interactions. One of the main physical phenomena that appear when we reduce the size of a magnetic particle is called superparamagnetism. In this work, we have looked for a description and understanding of the mathematical formalism attached to magnetic phenomena at nanoscale through the application of the Langevin’s function to magnetic NPs in superparamagnetic regime and non-interacting model. Accordingly, we use theoretical simulations of magnetization curves as a function of applied field to study some parameters and verify its compatibility with magnetic characterization data obtained for samples of NPs magnetite and maghemite. In this way, we can get relevant information to the analysis of the magnetic behavior of nanoparticulate systems. Finally, we have lunched the potential of these magnetic NPs in biomedical applications both in diagnostic techniques and in disease treatments.
publishDate 2016
dc.date.accessioned.fl_str_mv 2016-11-03T17:26:28Z
dc.date.available.fl_str_mv 2016-11-03T17:26:28Z
dc.date.issued.fl_str_mv 2016-05-20
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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status_str publishedVersion
dc.identifier.citation.fl_str_mv SAMPAIO, Guilherme Moisés. Nanopartículas magnéticas: simulações para o regime superparamagnético. 2016. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2016. Disponível em: https://repositorio.ufscar.br/handle/20.500.14289/8257.
dc.identifier.uri.fl_str_mv https://repositorio.ufscar.br/handle/20.500.14289/8257
identifier_str_mv SAMPAIO, Guilherme Moisés. Nanopartículas magnéticas: simulações para o regime superparamagnético. 2016. Dissertação (Mestrado em Ciência dos Materiais) – Universidade Federal de São Carlos, Sorocaba, 2016. Disponível em: https://repositorio.ufscar.br/handle/20.500.14289/8257.
url https://repositorio.ufscar.br/handle/20.500.14289/8257
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language por
dc.relation.confidence.fl_str_mv 600
600
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus Sorocaba
dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Ciência dos Materiais - PPGCM-So
dc.publisher.initials.fl_str_mv UFSCar
publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus Sorocaba
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