@article {5650,
	title = {Ionic Specificity in pH Regulated Charged Interfaces: Fe(3+) versus La(3+)},
	journal = {Langmuir},
	volume = {27},
	number = {19},
	year = {2011},
	note = {Wang, Wenjie Park, Rebecca Y. Meyer, David H. Travesset, Alex Vaknin, David},
	month = {10},
	pages = {11917-11924},
	abstract = {We determine the distribution of two trivalent ions Fe(3+) and La(3+) next to two different amphiphilic charged interfaces as ions or complexes, consisting of the phosphate lipid dihexadecyl phosphate (DHDP) and the fatty acid arachidic acid (AA). These amphiphiles provide a wide range of plc values, from 2.1 (DHDP) to 5.1 (AA), thus allowing manipulation of the surface charge over extremely low pH (pH similar to 1 or larger), and the two ions provide two limiting cases of specificity for the amphiphiles. We find that La(3+) distribution is mostly sensitive to the surface charge, whereas the Fe(3+) binding depend:: on its character in the solution and is highly specific, as indicated by the crucial role played by iron complexes (Fe(OH)(3) or Fe(OH)(2+)) forming covalent bonds even for an uncharged interface. The implications of the results to other ions and/or amphiphilic interfaces are also discussed.},
	isbn = {0743-7463},
	doi = {10.1021/la201880g},
	author = {Wang, W. J. and Park, R. Y. and Meyer, D. H. and Travesset, A. and Vaknin, D.}
}
