| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 609061 | Journal of Colloid and Interface Science | 2011 | 7 Pages |
The interaction between carboxylic acid-stabilised gold nanoparticles (AuNP) and pH-responsive microgels is shown. The microgel particles are a copolymer of N-[3-(dimethylamino)propyl]methacrylamide (DMAPMA) and N-isopropylacrylamide (NIPAM). The microgel properties are presented by their hydrodynamic diameter and electrophoretic mobility in response to pH. These microgel particles are pH-responsive under neutral conditions decreasing in diameter beyond pH 7. The dispersion characteristics of AuNP adsorbed onto the microgel network are shown with respect to adsorbed amount and the pH-responsive properties of the AuNP. This data is presented between pH 3 and 6 where the microgel properties remain constant. Asymmetric adsorption of AuNP onto poly(DMAPMA-co-NIPAM) microgels is achieved by adsorption of nanoparticles, from the aqueous phase, onto microgel-stabilised oil-in-water emulsions. These asymmetrically modified microgels display very different dispersion behaviour, in response to pH, due to their dipolar nature.
Graphical abstractThe influence on the dispersion properties of symmetric and asymmetrically modified microgel particles through the adsorption of carboxylic acid-stabilised gold nanoparticles.Figure optionsDownload full-size imageDownload high-quality image (42 K)Download as PowerPoint slideResearch highlights► The characterisation of rarely studied pH-responsive microgel particles and carboxylic acid-stabilised gold nanoparticles. ► The influence on microgel dispersion properties, such as particle size and electrophoretic mobility, by the adsorption of gold nanoparticles onto the microgel network. ► The asymmetric modification of microgel particles through adsorption of gold nanoparticles from a particle-stabilised emulsion. ► The effect of pH on the dispersion stability and properties of composite microgel particles.
