Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Maria Isabel Viseu"'
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 280:54-62
An anionic polymethine dye (a fluoro-oxonol abbreviated FDID), which forms monomers and oligomers according to the surrounding medium, is used in this work to probe the stability and dynamics of bicationic colloidal nanostructures, namely micelles an
Publikováno v:
Journal of Colloid and Interface Science. 351:156-165
In this work, solubilization of the phospholipid 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) by the cationic detergent n-dodecyltrimethylammonium chloride (DTAC) was studied in aqueous solution, at a fixed DMPC concentration and variable deter
Publikováno v:
Langmuir. 18:5772-5781
Two cationic porphyrins, the amphiphilic meso-tetra(4-N-stearylpyridyl)porphine (PO1) and the hydrophilic meso-tetra(4-N-methylpyridyl)porphine (TMPyP or PO2), were incorporated in ionic diluent matrixes containing sodiumhexadecyl sulfate (SHS) and d
Publikováno v:
Phys. Chem. Chem. Phys.. 4:4754-4762
The water-soluble tetracationic meso-tetra(4-methylpyridyl)porphine (PO2) was incorporated in mixed Langmuir monolayers (LM) with the anionic surfactant sodium hexadecylsulfate (SHS) and stearic acid (SA). The stability of the monolayer and the molec
Publikováno v:
Langmuir. 17:1529-1537
Equimolar catanionic monolayers were formed at the air−water interface by mixing double- or single-tailed cationic amphiphiles (with chain lengths varying from C12 to C18) with single-tailed anionic amphiphiles (from C12 to C16). The mixed systems
Autor:
Sílvia M. B. Costa, Maria Isabel Viseu, M. Mercedes Velázquez, ‡ and Inmaculada García-Mateos, Cláudia S. Campos
Publikováno v:
Langmuir. 16:4882-4889
Vesicles were found to form easily in diluted aqueous mixtures of two cationic amphiphiles, the double-tailed, bilayer-forming didodecyldimethylammonium bromide (DDAB) and the single-tailed, micelle-forming dodecyltrimethylammonium chloride (DTAC), a
Publikováno v:
Langmuir. 16:2105-2114
The spontaneous formation of vesicles was detected in aqueous mixtures of two cationic amphiphiles: the double-tailed didodecyldimethylammonium bromide, DDAB, and the single-tailed dodecyltrimethylammonium chloride, DTAC. These aggregates appear in a
Autor:
Sílvia M. B. Costa, Anantha Malathi, Maria Isabel Viseu, Amélia M.P.S. Gonçalves da Silva, and Patrícia Antunes
Publikováno v:
Langmuir. 16:1196-1204
The molecular packing of meso-tetra(4-N-stearylpyridyl)porphine tetra-p-toluenesulfonate (PO) was investigated at the air/water interface and in Langmuir−Blodgett (LB) films in progressively more c...
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 144:191-200
The miscibility of cationic and anionic surfactants when spread at the air–water interface was investigated at 298 K. At this temperature, the cationic dioctadecyldimethylammonium bromide (DODAB) forms an expanded monolayer, while the anionic sodiu
Publikováno v:
Thin Solid Films. 320:236-240
Mixed monolayers of dioctadecyldimethylammonium bromide (DODAB) with sodium hexadecylsulfate (SHS) can be obtained by spreading both components at the interface, co-spread (1) or separately spread (2), or by incorporation of the water soluble surfact