Positively and/or negatively charged poly (N-isopropylacrylamide)-based microgels were deposited on a single substrate and isolated regions of Au overlayers were deposited on top of the microgels. Each spatially isolated Au overlayer region had a different thickness to make an etalon array.We found that areas with a thin Au overlayer (5 nm) responded to a range of polymer molecular weights (MW), while areas with a thick overlayer (35 nm) can only respond to low molecular weight polyelectrolytes. By comparing the optical responses of the device’s individual array elements, a good approximation of the polyelectrolyteMWin solution can be made.
Islam, M. R.; Serpe, M. J. Poly (N-isopropylacrylamide) Microgel-based Etalons and Etalon Arrays for Determining the Molecular Weight of Polymers in Solution. APL Mater., 2013, 1, 052108. https://doi.org/10.1063/1.4829975
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.