TY  - JOUR
A1  - Koeth, Anja
A1  - Tiersch, Brigitte
A1  - Appelhans, Dietmar
A1  - Gradzielski, Michael
A1  - Cölfen, Helmut
A1  - Koetz, Joachim
T1  - Synthesis of Core-Shell Gold Nanoparticles with Maltose-Modified Poly(Ethyleneimine)
JF  - Journal of dispersion science and technology
N2  - The synthesis of ultrafine gold nanoparticles in presence of maltose-modified hyperbranched poly(ethyleneimines) (PEI) is described. The polymer acted as both a reducing and stabilising agent in the particle formation process. The nanoparticles were characterized by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), analytical ultracentrifugation (AUC), small-angle x-ray scattering (SAXS), and small-angle neutron scattering (SANS). The mechanism of nanoparticle formation can be described in two steps. The reduction process of the Au3+ ions located in the inner coil region of the hyperbranched PEI led to the formation of a compact gold core, and is accompanied by a collapse of the polymer coil. Therefore, in the subsequent reduction process a gold-polymer hybrid shell is formed. By using the PEI of higher molar mass, core-shell gold nanoparticles of about 3.6 nm size with a more narrow size distribution and special fluorescence behavior could be synthesized.
KW  - Gold nanoparticles
KW  - gold-polymer hybrid shell
KW  - maltose-modified poly(ethyleneimine)
Y1  - 2012
U6  - https://doi.org/10.1080/01932691.2010.530084
SN  - 0193-2691
VL  - 33
IS  - 1-3
SP  - 52
EP  - 60
PB  - Taylor & Francis Group
CY  - Philadelphia
ER  -