Síntese coloidal de nanocristais magnéticos com superfície macromolecular
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/6547 |
Resumo: | This dissertation describes the development of a synthetic route to obtain colloidal magnetic nanocrystals in solvent of high molar weight and different polarities. Magnetite Nanocrystals ware synthesized by thermal decomposition method using organometallic. With this method was possible to control the size of nanoparticle, obtain high crystallinity and control solubility in several organic solvents. The results showed that the nanocrystals solubility synthesized by this method is governed by polarity of macromolecular solvents. Hydrophobic macromolecule became hydrophobic magnetic nanocrystals. On the other hand, hydrophilic macromolecule result hydrophilic magnetic nanocrystals, like this amphiphilic macromolecule solvent transfer these properties to nanocrystals, turning them into amphiphilic. This solubility behavior was clarified by infrared spectroscopy analysis, indicating the existence of anchored macromolecules on the nanocrystals surface. Besides the crystallographic phase obtained, was also possible obtain superparamagnetic material and high saturation magnetization, revealing so that these colloidal magnetic nanocrystals have potential for biological application. |
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Gonçalves, Ricardo HenriqueLeite, Edson Robertohttp://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783657E4http://lattes.cnpq.br/23851278569210055a9464fa-e136-4f34-a12c-ccdb9eccd89b2016-06-02T20:36:42Z2013-03-012016-06-02T20:36:42Z2009-08-17https://repositorio.ufscar.br/handle/ufscar/6547This dissertation describes the development of a synthetic route to obtain colloidal magnetic nanocrystals in solvent of high molar weight and different polarities. Magnetite Nanocrystals ware synthesized by thermal decomposition method using organometallic. With this method was possible to control the size of nanoparticle, obtain high crystallinity and control solubility in several organic solvents. The results showed that the nanocrystals solubility synthesized by this method is governed by polarity of macromolecular solvents. Hydrophobic macromolecule became hydrophobic magnetic nanocrystals. On the other hand, hydrophilic macromolecule result hydrophilic magnetic nanocrystals, like this amphiphilic macromolecule solvent transfer these properties to nanocrystals, turning them into amphiphilic. This solubility behavior was clarified by infrared spectroscopy analysis, indicating the existence of anchored macromolecules on the nanocrystals surface. Besides the crystallographic phase obtained, was also possible obtain superparamagnetic material and high saturation magnetization, revealing so that these colloidal magnetic nanocrystals have potential for biological application.Esta dissertação descreve o desenvolvimento de uma rota sintética para obter nanocristais magnéticos coloidais em solventes de alta massa molar e diferentes polaridades. Nanocristais de magnetita foram sintetizado por processo de termodecomposição de organometálicos. Utilizando este método foi possível controlar o tamanho de partícula, obter alta cristalinidade e controlar a solubilidade em vários solventes orgânicos. Os resultados mostraram que a solubilidade dos nanocristais sintetizados por este método é governada pela polaridade do solvente macromolecular. Macromoléculas hidrofóbicas tornaram os nanocristais magnéticos hidrofóbicos. Por outro lado, macromoléculas hidrofílicas resultaram em nanocristais magnéticos hidrofílicos. Por fim, solvente macromolecular anfifílico transfere esta propriedade para os nanocristais, tornando-os anfifílicos. Este comportamento de solubilidade foi esclarecido por espectroscopia na região do infravermelho, indicando a presença de macromoléculas ancorada na superfície dos nanocristais. Além da fase cristalográfica de interesse obtida, também foi possível obter um material superparamagnético e com alta magnetização de saturação, revelando desta forma que estes nanocristais magnéticos coloidais possuem potencial para aplicações biológicas.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarBRQuímica coloidalMagnetitaSuperparamagnéticoCIENCIAS EXATAS E DA TERRA::QUIMICASíntese coloidal de nanocristais magnéticos com superfície macromolecularinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-19c25e6a7-a2cd-4058-97ed-441bc2793123info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL4886.pdfapplication/pdf9786906https://repositorio.ufscar.br/bitstream/ufscar/6547/1/4886.pdf89caafc2f184f60fa4b976e2ded6451eMD51TEXT4886.pdf.txt4886.pdf.txtExtracted texttext/plain0https://repositorio.ufscar.br/bitstream/ufscar/6547/4/4886.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD54THUMBNAIL4886.pdf.jpg4886.pdf.jpgIM Thumbnailimage/jpeg8614https://repositorio.ufscar.br/bitstream/ufscar/6547/5/4886.pdf.jpgc1810367296972cab1fcdb24d689e600MD55ufscar/65472023-09-18 18:30:39.624oai:repositorio.ufscar.br:ufscar/6547Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:39Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
title |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
spellingShingle |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular Gonçalves, Ricardo Henrique Química coloidal Magnetita Superparamagnético CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
title_full |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
title_fullStr |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
title_full_unstemmed |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
title_sort |
Síntese coloidal de nanocristais magnéticos com superfície macromolecular |
author |
Gonçalves, Ricardo Henrique |
author_facet |
Gonçalves, Ricardo Henrique |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/2385127856921005 |
dc.contributor.author.fl_str_mv |
Gonçalves, Ricardo Henrique |
dc.contributor.advisor1.fl_str_mv |
Leite, Edson Roberto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783657E4 |
dc.contributor.authorID.fl_str_mv |
5a9464fa-e136-4f34-a12c-ccdb9eccd89b |
contributor_str_mv |
Leite, Edson Roberto |
dc.subject.por.fl_str_mv |
Química coloidal Magnetita Superparamagnético |
topic |
Química coloidal Magnetita Superparamagnético CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
This dissertation describes the development of a synthetic route to obtain colloidal magnetic nanocrystals in solvent of high molar weight and different polarities. Magnetite Nanocrystals ware synthesized by thermal decomposition method using organometallic. With this method was possible to control the size of nanoparticle, obtain high crystallinity and control solubility in several organic solvents. The results showed that the nanocrystals solubility synthesized by this method is governed by polarity of macromolecular solvents. Hydrophobic macromolecule became hydrophobic magnetic nanocrystals. On the other hand, hydrophilic macromolecule result hydrophilic magnetic nanocrystals, like this amphiphilic macromolecule solvent transfer these properties to nanocrystals, turning them into amphiphilic. This solubility behavior was clarified by infrared spectroscopy analysis, indicating the existence of anchored macromolecules on the nanocrystals surface. Besides the crystallographic phase obtained, was also possible obtain superparamagnetic material and high saturation magnetization, revealing so that these colloidal magnetic nanocrystals have potential for biological application. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009-08-17 |
dc.date.available.fl_str_mv |
2013-03-01 2016-06-02T20:36:42Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T20:36:42Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/6547 |
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https://repositorio.ufscar.br/handle/ufscar/6547 |
dc.language.iso.fl_str_mv |
por |
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por |
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-1 -1 |
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9c25e6a7-a2cd-4058-97ed-441bc2793123 |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química - PPGQ |
dc.publisher.initials.fl_str_mv |
UFSCar |
dc.publisher.country.fl_str_mv |
BR |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
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