ORGN 345 |
| Calixarenes can be excellent surfactants for dispersing metal nanoparticles in the 10-100 nm range, and mediating their self-assembly into well-defined ensembles with unique optical or magnetic properties. The calixarene tailgroups are displayed in an arrangement which enhances nanoparticle dispersion, and the headgroups can be tailored for strong chemisorption onto nanoparticle surfaces. We have used resorcinarenes (a subclass of calixarenes) to promote the dispersion of metal nanoparticles and nanorods in nonpolar organic solvents, en route to the synthesis of core-shell nanostructures. Resorcinarenes have also had a pivotal role in the self-assembly of colloidal gold nanoparticles into 2D arrays with size-dependent SERS responses, as well as the self-assembly of Co nanoparticles into nanorings with chiral magnetic states. |
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Organic Approaches to Nanotechnology
8:00 AM-12:00 PM, Tuesday, 12 September 2006 Moscone Center -- Room 135, Oral
Division of Organic Chemistry |