Ultra-long palladium nanoworms by polymer grafts

作者：Bokern Stefan; Volz Kerstin; Agarwal Seema; Greiner Andreas^*

来源：Journal of Nanoparticle Research, 2012, 14(8): 1041.

DOI：10.1007/s11051-012-1041-z

• Core/shell materials
• Gel permeation chromatography
• Nanostructures
• Nanoparticles
• Palladium

Chemically and morphologically stable, non-aggregating palladium nanoworms with diameters of 2 nm and lengths of up to 10 nm with a graft-to polystyrene shell were synthesized in a straight-forward one-phase system, and proof for the mechanism of formation is presented. The synthesis has been achieved by the application of omega-2,2%26apos;-bipyridyl-polystyrene as stabilizer, which led to a %26quot;graft-to%26apos;%26apos; structure of palladium nanoworms with polystyrene shell. The nanoworms have been characterized by TEM, XRD, and coupled GPC-UV/Vis measurement. It was possible to show that the formation of nanoworms proceeds by agglomeration of spherical palladium nanoparticles. This mechanism was transferred to omega-thiol-polystyrene as stabilizer, which results in either spherical nanoparticles (low ratio Pd:Polymer, %26lt;2 nm diameter) or high aspect ratio nanoworms (high ratio Pd: Polymer, up to 10 x 120 nm), proving that the formation of palladium nanoworms was not exclusive for pyridine/amine-based ligands.

• 出版日期2012-8