Microscopy and optical manipulation of dendrimer-built vesicles

T. Gensch, K. Tsuda, G.C. Dol, L. Latterini, J.W. Weener, A.P.H.J. Schenning, J. Hofkens, E.W. Meijer, F.C. Schryver, de

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Samenvatting

A fifth-generation poly(propylene imine) dendrimer decorated with palmitoyl- and azobenzene-containing alkyl groups forms giant vesicles in aqueous solutions with diameters From 50 nm up to 20 mum and a multilaminar onion-like structure. Dense and ordered arrangement of the azobenzene chromophores in the bilayer structure leads to fluorescence with lambda (max)= 600 nm. The fluorescence intensity can be increased by irradiation with blue light, and at low pH a distinctive blue shift of the spectrum is observed. With the aid of a single-beam optical tweezers it is possible to trap vesicles and direct them in a billiard-like fashion against each other using forces in the range of several pN. In collision experiments, the vesicles behave like hard spheres, and merging is not observed
Originele taal-2Engels
Pagina's (van-tot)435-441
TijdschriftPure and Applied Chemistry
Volume73
Nummer van het tijdschrift3
DOI's
StatusGepubliceerd - 2001

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