Abstract
A series of gold nanoparticles stabilised by 'Newkome-type' dendritic branching has been synthesised and fully characterised. In particular, the properties and behaviour of these hybrid materials are compared with those of a previously reported set of nanoparticles stabilised by dendrons constructed using L-lysine building blocks. The rates of cyanide-induced nanoparticle decomposition were determined, and it was found that the rate of decomposition increased on the introduction of dendritic branching. Furthermore, 'Newkome-type' dendrons were significantly more effective at protecting the encapsulated gold nanoparticle than the L-lysine based dendrons. It is proposed that this observation can be explained on the basis of more effective packing and surface coverage by the 'Newkome-type' dendrons. Importantly, this study therefore demonstrates that the organic chemical structure of dendritic ligands plays a crucial role in controlling the reactivity of self-assembled hybrid nanostructures. (c) 2006 Elsevier Inc. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 178-186 |
| Number of pages | 9 |
| Journal | JOURNAL OF COLLOID AND INTERFACE SCIENCE |
| Volume | 302 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Oct 2006 |
Keywords
- dendrimers
- kinetics
- nanoparticles
- stability
- structure-activity relationships
- UV-vis spectroscopy
- GOLD CLUSTER MOLECULES
- THERMAL-STABILITY
- CASCADE POLYMERS
- CORE SIZE
- NANOCRYSTALS
- MONOLAYER
- DEPENDENCE
- DENDRIMERS
- MACROMOLECULES
- NANOTECHNOLOGY