Gel to liquid-crystal transitions in synthetic amphiphile vesicles

Anchoring of hydrophobically modified poly(sodium acrylate)s into DDP vesicle bilayers: hydrophobic match and mismatch

“…The aqueous DDP suspension was heated to above 55°C, with stirring for 30 min [9]. This ''hot water#stirring'' method was shown using electron microscopy to yield spherical vesicles [10a], which are unilamellar [11]. The resulting vesicle solution was cooled to room temperature, and the appropriate amount of polymer was added.…”

“…As has been described in ref. [11], the measured dependence on temperature of an isobaric heat capacity cannot be transposed to that of the individual surfactant (i.e. DDP) molecules.…”

Understanding organic reactions in water: from hydrophobic encounters to surfactant aggregates

“…69 The results emphasise the importance of the nature of the counter ion and reveal a large temperature dependence of the enthalpy of vesiculation as anticipated for a process involving hydration shell overlap.Gel-to-liquid crystalline phase transitions in vesicular bilayers can be studied using a differential scanning microcalorimeter. 70 The design of the latter is similar to that for a titration microcalorimeter except that the syringe system is absent and the sample cell sealed under nitrogen gas. Both cells are gradually heated from 5 to 90°C under computer control.…”

Surface phase behavior of di-n-tetradecyl hydrogen phosphate in Langmuir monolayers at the air–water interface

“…On the other hand, di-n-alkyl phosphates (DAP) having analogue molecular structure of phospholipids have mostly been used to form vesicles to mimic the cell membrane [9]. Reports on size and shape of the vesicles of the latter group of amphiphiles and their interactions with different organic molecules and inorganic ions have readily been available in the literature [10][11][12][13]. However, studies on the properties of the DAP monolayers have largely been ignored.…”