Small-Angle Neutron Scattering From Metal Ion-Containing PAMAMOS Dendrimer Networks

Published

January 1, 2001

Author(s)

Robert A. Bubeck, Barry J. Bauer, P Dvornic, M J. Owen, S Reeves, P Parkham, L W. Hoffman

Abstract

There is considerable interest in the development of nanocomposites based on dendrimers as host matrices. The intent is to take advantage of functionalized dendrimer interiors that can complex with an added constituent, resulting in nanocomposites for specific applications. In order to better define such systems, networks based upon radially-layered copolymeric poly(amidoamine-organosilicon) (PAMAMOS) dendrimers modified with either Au3+ or Cu2+ were characterized using small-angle neutron scattering (SANS). The crosslinked PAMAMOS dendrimer networks were found to have a fairly high degree of order, as indicated by the SANS, which showed a core-to-core distance of 37 . The addition of Au3+ or Cu2+ in solution before crosslinking of the PAMAMOS dendrimers resulted in a nanocomposite microstructure with a preference for the dendrimer interiors. The mass fraction for Cu2+ appears to be an practical upper limit, above which a significant portion of the ionic content is not centralized in the dendrimer interiors.

Citation

ACS PMSE Preprint

Volume

84

Pub Type

Journals

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Keywords

dendrimer networks, nanocomposites, PAMAMOS, small-angle neutron scattering

Citation

Bubeck, R. , Bauer, B. , Dvornic, P. , Owen, M. , Reeves, S. , Parkham, P. and Hoffman, L. (2001), Small-Angle Neutron Scattering From Metal Ion-Containing PAMAMOS Dendrimer Networks, ACS PMSE Preprint, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851815 (Accessed December 5, 2024)