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https://hdl.handle.net/1822/4434
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Hungerford, Graham | - |
dc.contributor.author | Real Oliveira, M. Elisabete C.D. | - |
dc.contributor.author | Castanheira, Elisabete M. S. | - |
dc.contributor.author | Burrows, H. D. | - |
dc.contributor.author | Miguel, M. da Graça | - |
dc.date.accessioned | 2006-02-13T16:26:00Z | - |
dc.date.available | 2006-02-13T16:26:00Z | - |
dc.date.issued | 2004 | - |
dc.identifier.citation | "Progress in Colloid and Polymer Science". ISSN 0340-255X. 123 (2004) 1-4. | eng |
dc.identifier.isbn | 3540005536 | por |
dc.identifier.issn | 0340-255X | eng |
dc.identifier.uri | https://hdl.handle.net/1822/4434 | - |
dc.description.abstract | Fluorescent probes incorporated in ternary surfactant systems have proved valuable in elucidating structure, dynamics and phase behaviour. The intriguing case of microemulsions using non-ionic surfactants, such as alkyloligoethylene oxides, can form phases simultaneously bicontinuous in oil and water. Fluorescence analysis provides both sensitivity and selectivity to monitor these systems. We have used pyrene and rhodamine 6G as probes to enrich our knowledge of the C12E5/alkane/water system, with particular relevance to the bicontinuous phase. Pyrene has been used as a dynamic probe, studying both excimer formation and quenching by molecular oxygen. This provides a useful tool to monitor transitions between microemulsion phases. Both steady state and time-resolved fluorescence measurements indicate a change in localisation on passing from one phase to another. Information was also obtained on microviscosities in these systems using fluorescence depolarisation making use of the well-known laser dye rhodamine 6G. Comparison of the fluorescence characteristics of these systems provides a means to monitor at the microscopic level changes in phase behaviour. | eng |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia (FCT) - PRAXIS XXI, POCTI/35415/QUI/2000. | por |
dc.language.iso | eng | eng |
dc.publisher | Springer Verlag | eng |
dc.rights | restrictedAccess | eng |
dc.subject | Anisotropy | eng |
dc.subject | C12E5 | eng |
dc.subject | Fluorescence | eng |
dc.subject | Pyrene | eng |
dc.subject | Rhodamine 6G | eng |
dc.subject | C E Fluorescence 12 5 | por |
dc.title | Transitions in ternary surfactant-alkane-water microemulsions as viewed by fluorescence | eng |
dc.type | conferencePaper | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | www.springerlink.com | eng |
sdum.pagination | 1-4 | eng |
sdum.publicationstatus | published | eng |
sdum.volume | 123 | eng |
oaire.citationStartPage | 1 | por |
oaire.citationEndPage | 4 | por |
oaire.citationVolume | 123 | por |
dc.identifier.doi | 10.1007/b11608 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Progress in Colloid and Polymer Science | por |
sdum.conferencePublication | TRENDS IN COLLOID AND INTERFACE SCIENCE XVI | por |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2004 ProgCollPolymSci_C12E5.pdf Acesso restrito! | Documento principal | 278,75 kB | Adobe PDF | Ver/Abrir |