Surface charge density determination in electric double layered magnetic fluids

dc.creatorTourinho, Francisco Augusto
dc.creatorCampos, Alex Fabiano Cortez
dc.creatorSilva, Renata Aquino da
dc.creatorLara, Maria Cristina Figueiredo Lima e
dc.creatorSilva, Gerlado José da
dc.creatorDepeyrot, Jérôme
dc.date.accessioned2010-10-13T12:04:05Z
dc.date.available2010-10-13T12:04:05Z
dc.date.created2010-10-13T12:04:05Z
dc.date.issued2002
dc.identifierTOURINHO, F.A. et al. Surface charge density determination in electric double layered magnetic fluids. Braz. J. Phys., v.32, n.2b, p. 501-508, jun. 2002. Disponível em: <http://www.scielo.br/pdf/bjp/v32n2b/v23n2ba08.pdf>. Acesso em: 12 out 2010.
dc.identifierhttp://repositorio.unb.br/handle/10482/5644
dc.description.abstractWe analyze potentiometric and conductimetric measurements, simultaneously performed in several complex systems (Brönsted acid-base-type). The results show an excellent agreement between reported and obtained values of the dissociation constants of the involved equilibria. A similar analysis is proposed to account, in electric double layered magnetic fluids (EDL-MF), for the charging of the particle surface based on a proton transfer proccess at the interface with the bulk dispersion. This model allows to relate the pH dependence of the phase diagram to the variations of the nanoparticle surface charge density, which leads to a useful method to monitor the colloidal stability of EDL-MF.
dc.languageInglês
dc.rightsAcesso Aberto
dc.titleSurface charge density determination in electric double layered magnetic fluids
dc.typeArtículos de revistas


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