Next Article in Journal
Reproducible Design for the Optical Screening and Sensing of Hg(II) Ions
Previous Article in Journal
Toward Non-Enzymatic Ultrasensitive Identification of Single Nucleotide Polymorphisms by Optical Methods
Previous Article in Special Issue
Discriminating Bacteria with Optical Sensors Based on Functionalized Nanoporous Xerogels
Article Menu

Export Article

Open AccessArticle
Chemosensors 2014, 2(3), 207-218; doi:10.3390/chemosensors2030207

Photonic Crystal-Based Sensing and Imaging of Potassium Ions

Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040 Regensburg, Germany
*
Author to whom correspondence should be addressed.
Received: 28 April 2014 / Revised: 4 August 2014 / Accepted: 9 September 2014 / Published: 18 September 2014
(This article belongs to the Special Issue Photonic Sensors for Biological and Chemical Measurements)
View Full-Text   |   Download PDF [352 KB, uploaded 18 September 2014]   |  

Abstract

We report on a method for selective optical sensing and imaging of potassium ions using a sandwich assembly composed of layers of photonic crystals and an ion-selective membrane. This represents a new scheme for sensing ions in that an ionic strength-sensitive photonic crystal hydrogel layer is combined with a K+-selective membrane. The latter consists of plasticized poly(vinyl chloride) doped with the K+-selective ion carrier, valinomycin. The film has a red color if immersed into plain water, but is green in 5 mM KCl and purple at KCl concentrations of 100 mM or higher. This 3D photonic crystal sensor responds to K+ ions in the 1 to 50 mM concentration range (which includes the K+ concentration range encountered in blood) and shows high selectivity over ammonium and sodium ions. Sensor films were also imaged with a digital camera by exploiting the RGB technique. View Full-Text
Keywords: photonic crystal; chemical sensor; hydrogel; RGB readout; potassium sensing; imaging photonic crystal; chemical sensor; hydrogel; RGB readout; potassium sensing; imaging
Figures

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Fenzl, C.; Kirchinger, M.; Hirsch, T.; Wolfbeis, O.S. Photonic Crystal-Based Sensing and Imaging of Potassium Ions. Chemosensors 2014, 2, 207-218.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Chemosensors EISSN 2227-9040 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top