Aqueous Solutions of Zwitterionic Surfactants with Varying Carbon Number of the Intercharge Group. 2. Ion Binding by the Micelles

Electrochemical, spectroscopic and microscopic characterisation of novel poly(3,4-ethylenedioxythiophene)/gold nanoparticles composite materials

“…This result can be explained by similar arguments, by considering that SB12 acts as an anionic surfactant, leading to the formation of micelles exposing anionic charges at the interface with the solution. This effect, already observed in the case of zwitterionic surfactant [41,42], was recently supported by us through different observations [28]. Additionally, it is worth noticing that the inclusion of bulky counterions, such as SB12 and Au-SB12, inside the p-doped polymer matrix, strongly affects the morphology of the film [28]; moreover, the porosity and conductivity of the deposit can be also influenced.…”

Microstructural characterization of lysophosphatidylcholine micellar aggregates: The structural basis for their use as biomembrane mimics

“…The results show that C n lysoPC micelles, like other zwitterionic ones [43], can interact with both anionic and cationic guests. Anionic molecules preferably adsorb on the micellar surface, while cationic ones can be embedded in the hydrophilic external layer.…”

Development and characterisation of a novel composite electrode material consisting of poly(3,4-ethylenedioxythiophene) including Au nanoparticles

“…We can hypothesise that electrostatic attractions between the anionic NPs and p-doped chains lead to formation of stable adducts in solution, which counteracts the growth of the polymeric material on the electrode surface. A similar mechanism can be invoked to explain the higher A P values observed for PEDOT/SB12 deposition with respect to PEDOT/ClO 4 − , by admitting that SB12, like other zwitterionic surfactant, acts as an anionic surfactant due to the formation of micelles exposing anionic charges at the interface with the solution [27,28]. In addition, different surfactants based on zwitterionic alkylammonium species form micelles which are reported to solubilise a probe aromatic molecule in the micelle core: hydrophobic alkyl chains and ammonium head groups are located close to the core of the micelles, while the anionic groups are located in the outermost part [29], forming a negative cloud around the micelles.…”