Gold nanoparticles surface-confined by hybrid self-assembled monolayers (SAMs) were synthesized by replacement of dendrimer-passivated nanoparticles by dodecanethiol. Transmission electron microscopy, small-angle X-ray scattering (SAXS), infrared absorption spectroscopy, 1H NMR and elemental analysis were performed to characterize hybrid-layer-passivated nanoparticles. The hybrid particles were separated into domains of small and large spheres. This indicates that the replacement may be dependent on the particle size.
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Manna et al. (2003) studied this question.
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