Chemical composition of surface-functionalized gold nanoparticles View Full Text


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Article Info

DATE

2011-06-19

AUTHORS

Alexander Rostek, Dirk Mahl, Matthias Epple

ABSTRACT

The composition of surface-functionalized gold nanoparticles (diameter of the metallic core: 17–20 nm) was determined by elemental analysis (C, H, N, S, Au, Na) after preparation of a larger batch. Gold nanoparticles were prepared and functionalized with citrate according to the classical Turkevich method. The citrate-functionalized nanoparticles contained about 3.1 wt% of organic material (135 ng cm−2 or 3.1 molecules nm−2). A partial exchange of citrate was accomplished by tris(sodium-m-sulfonato-phenyl)phosphine (TPPTS) which led to 2.1 wt% of citrate (90 ng cm−2 or 2.1 molecules nm−2) and 1.4 wt% TPPTS (61 ng cm−2 or 0.6 molecules nm−2). The citrate coating was quantitatively exchanged by poly(N-vinyl pyrrolidone) (PVP) after immersion in solutions with concentrations of 33, 66 and 128 mg L-1, respectively, leading to contents of 4 to 6 wt% of PVP (171–271 ng cm−2 or 9–15 PVP monomer units nm−2). More... »

PAGES

4809-4814

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11051-011-0456-2

DOI

http://dx.doi.org/10.1007/s11051-011-0456-2

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https://app.dimensions.ai/details/publication/pub.1051887945


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