Journal Article

FZJ-2017-01893

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Three-dimensional inkjet-printed redox cycling sensor

Bachmann, B. ; Offenhäusser, A.FZJ* ; Wolfrum, B.FZJ* ; Yakushenko, A. (Corresponding author)FZJ* ; Adly, N.FZJ* ; Krause, K.FZJ*

2017
RSC Publishing London

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/15132  doi:10.1039/C6RA27170G

Abstract: Multilayer inkjet printing is emerging as a robust platform for fabricating flexible electronic devices over a large area. Here, we report a straightforward, scalable and inexpensive method for printing multilayer three-dimensional nanoporous redox cycling devices with a tunable nanometer gap for electrochemical sensing. The fabrication of the electrochemical redox cycling device is based on vertical stacking of two conductive electrodes made of carbon and gold nanoparticle inks. In this configuration, the two electrodes are parallel to each other and electrically separated by a layer of polystyrene nanospheres. As the top and the bottom electrodes are biased to, respectively, oxidizing and reducing potentials, repetitive cycling of redox molecules between them generates a large current amplification. We show that a vertical interelectrode spacing down to several hundred nanometers with high precision using inkjet printing is possible. The printed sensors demonstrate excellent performance in electrochemical sensing of ferrocene dimethanol as a redox-active probe. A collection efficiency of 100% and current amplification up to 30-fold could be obtained. Our method provides a low cost and versatile means for sensitive electrochemical measurements eliminating the need for sophisticated fabrication methods, which could prove useful for sensitive point-of-care diagnostics devices.

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Contributing Institute(s):

1. Bioelektronik (ICS-8)
2. Bioelektronik (PGI-8)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 523 - Controlling Configuration-Based Phenomena (POF3-523) (POF3-523)
2. 552 - Engineering Cell Function (POF3-552) (POF3-552)

Appears in the scientific report 2017

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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