COLL 254 |
| Behavior of stimuli-sensitive microgels on SPR (surface plasmon resonance) sensor chip was studied using poly(N-isopropylacrylamide-co-acrylic acid) microgels. The dispersions of microgels with different NaCl concentrations were run over the SPR chip which was covered with a self-assembled monolayer (SAM) having amine functional groups at the top surface. The hydrodynamic size of microgels decreased with increasing salt concentration in dispersion and also on the SPR chip. SPR response of microgels bound to the chip was found to be controlled by the microgel induced change of the mean square electric field amplitude which was a function of the swelling degree and volume of microgels on the chip. The simulated SPR response sufficiently described the effects of physicochemical parameters. |
|
Fundamental Research in Colloid and Surface Chemistry
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster
Division of Colloid & Surface Chemistry |