Paper-Based All-Solid-State Ion-Sensing Platform with a Solid Contact Comprising Colloid-Imprinted Mesoporous Carbon and a Redox Buffer

Jinbo Hu, Wenyang Zhao, Philippe Bühlmann, Andreas Stein

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report the design, structure, and performance of a planar paper-based ion-sensing platform that utilizes colloid-imprinted mesoporous (CIM) carbon as a solid contact, with a redox buffer as the internal reference. This device contains an all-solid-state ion-selective electrode and an all-solid-state reference electrode that are integrated into the paper substrate with a symmetrical cell design. To ensure calibration-free sensor operation, each interfacial potential within the device is well-defined by the use of a redox buffer added to the sensing and reference membranes that controls the interfacial potentials at the CIM carbon/sensing membrane and CIM carbon/reference membrane interfaces. Two types of redox buffers were evaluated for this purpose, i.e., one based on the tetrakis(pentafluorophenyl)borate salts of cobalt(II/III) tris(4,4′-dinonyl-2,2′-bipyridyl) and one consisting of 7,7,8,8-tetracyanoquinodimethane and its corresponding anion radical. The feasibility of the design was demonstrated with aqueous KCl solutions. By design, the device only needs one droplet of sample, and it does not need any supply reagents or sensor pretreatment (i.e., conditioning and calibration) to function.

Original languageEnglish (US)
Pages (from-to)293-301
Number of pages9
JournalACS Applied Nano Materials
Volume1
Issue number1
DOIs
StatePublished - Jan 26 2018

Bibliographical note

Funding Information:
The University of Minnesota Initiative for Renewable Energy and the Environment supported this work. J.H. thanks the Krogh family for a Lester C. and Joan M. Krogh Fellowship and the Graduate School of the University of Minnesota for a Doctoral Dissertation Fellowship. We thank Carl Schu from Medtronic PLC (industrial fellow of the Industrial Partnership for Research in Interfacial and Materials Engineering, IPRIME, program) for valuable discussions.

Funding Information:
The University of Minnesota Initiative for Renewable Energy and the Environment supported this work. J.H. thanks the Krogh family for a Lester C. and Joan M. Krogh Fellowship and the Graduate School of the University of Minnesota for a Doctoral Dissertation Fellowship. We thank Carl Schu from Medtronic PLC (industrial fellow of the Industrial Partnership for Research in Interfacial and Materials Engineering IPRIME, program) for valuable discussions.

Publisher Copyright:
© 2017 American Chemical Society.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • all-solid-state ion-selective electrode
  • chloride
  • mesoporous carbon
  • paper-based sensor
  • potentiometry
  • redox buffer

Fingerprint

Dive into the research topics of 'Paper-Based All-Solid-State Ion-Sensing Platform with a Solid Contact Comprising Colloid-Imprinted Mesoporous Carbon and a Redox Buffer'. Together they form a unique fingerprint.

Cite this