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Open Access Adsorption and Self-Organization of Dendrimers at Water–Solid Interfaces

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Adsorption of poly(amido amine) (PAMAM) dendrimers at water–silica interfaces and the resulting self-organization on this type of substrate is discussed. Investigations with optical reflectivity and atomic force microscopy (AFM) reveal that dendrimers form monolayers of low coverage on such surfaces with liquid-like structure. The nearest neighbor separation distance in these layers is dictated by screened Coulomb repulsion forces between the adsorbing dendrimers. This effect rationalizes the strong increase of the adsorbed amount with the ionic strength and pH. These layers are stable for high dendrimer generations, while they can become unstable for lower generations.

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Keywords: ADSORPTION; ATOMIC FORCE MICROSCOPY; DENDRIMER; REFLECTIVITY; WATER-SILICA INTERFACE

Document Type: Research Article

Publication date: 2009-05-01

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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