Analyte Separation for Microfluidic Applications by Surface Charge Modified Functional Pigment Coatings

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Research units


Printed, self-contained sensors based on capillary transport and microfluidic principles are part of rapidly emerging research in printed functionality. Previous work into such designs has mainly focused on cellulosic papers as base substrates. In this study, the authors continue to present findings on how the use of custom-designed functional pigment coatings as alternative substrates, combined with local functionalisation by inkjet printed polyelectrolytes, allows for tailoring of surface chemistries to concentrate or separate anionic or cationic molecules. Both anionised and cationised coatings are tested and found to transport similarly charged model colourants, while separating those of opposite charge, with the extent of separation depending on colourant concentration. Furthermore, local surface chemistry reversal by new cationic (polyethyleneimine) and anionic (carboxymethyl cellulose) polyelectrolyte inks is demonstrated as a complementary method for analyte separation or concentration.


Original languageEnglish
Title of host publicationAdvances in Printing and Media Technology
Subtitle of host publicationProceedings of the 44th International Research Conference of iarigai
EditorsPatrick Gane, Cathy Ridgway
Publication statusPublished - 10 Sep 2017
MoE publication typeA4 Article in a conference publication
EventInternational Research Conference of Advances in Printing and Media Technology - Fribourg, Switzerland
Duration: 10 Sep 201713 Sep 2017
Conference number: 44

Publication series

NameAdvances in Printing and Media Technology
ISSN (Print)2409-4021


ConferenceInternational Research Conference of Advances in Printing and Media Technology
Abbreviated titleIARIGAI
Internet address

    Research areas

  • functional coating, functional printing, inkjet printing, polyelectrolyte, separation

ID: 15309499