Patterning of Poly(acrylic acid) by Ionic Exchange Reactions in Microfluidic Channels


  • This research was supported by an NIH award (NIH GM065364) and used the shared Resource Facilities supported by the National Science Foundation under NSEC (PHY-0117795) and MRSEC (DMR-0213805) awards. M. N. acknowledges support from an NIH fellowship (T32-GM07598). R. P.-C. gratefully acknowledges the Generalitat de Catalunya (DURSI) for support in the form of a postdoctoral fellowship. E. A. W. thanks the Petroleum Research Fund of the American Chemical Society for a fellowship (PRF # 43083-AEF). Supporting Information is available online from Wiley InterScience or from the author.


original image

A thin film of crosslinked poly(acrylic acid) (PAA), patterned within microfluidic channels (see figure) and crosslinked with metal cations, serves as a platform for rapid “on-chip” growth of patterned metallic and semiconductor nanoparticles. The embedded particles serve as catalysts for electroless deposition of metal films.