University of Oulu

Elli Leppänen, Eero Gustafsson, Niklas Wester, Ilkka Varjos, Sami Sainio, Tomi Laurila, Geometrical and chemical effects on the electrochemistry of single-wall carbon nanotube (SWCNT) network electrodes, Electrochimica Acta, Volume 466, 2023, 143059, ISSN 0013-4686,

Geometrical and chemical effects on the electrochemistry of single-wall carbon nanotube (SWCNT) network electrodes

Saved in:
Author: Leppänen, Elli1; Gustafsson, Eero1; Wester, Niklas1,2;
Organizations: 1Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, PO Box 13500, 00076 Aalto, Finland
2Canatu Oy, Tiilenlyöjänkuja 9, 00390 01720 Vantaa, Finland
3Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
4Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, PO Box 4500, 90570 Oulu, Finland
5Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, PO Box 16200, 00076 Aalto, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.9 MB)
Persistent link:
Language: English
Published: Elsevier, 2023
Publish Date: 2023-11-02


Single-wall carbon nanotube (SWCNT) network is a promising electrode material for bio detection. Unfortunately, the associations between their physical as well as chemical properties and observed electrochemical performance are not known. This hinders any systematic optimization of the network properties towards specific analytes. Here we present a consistent physicochemical and electrochemical characterization of differently treated SWCNT networks. The results unambiguously show that (i) even if the electrochemical properties of different electrodes are practically identical when assessed by surface insensitive outer sphere redox (OSR) probes their behavior with inner sphere redox (ISR) probes can be drastically different. Further, (ii) the choice of the modification method (structural, chemical, electrochemical) heavily depends on nature of the target analyte, which are typically ISR probes. Although, (iii) chemical changes in the carbon phase appeared to be minor, effects of different treatments on oxidation states of Fe appeared to have a strong effect on the electrochemical performance of the networks in the case of ISR probes.

see all

Series: Electrochimica acta
ISSN: 0013-4686
ISSN-E: 1873-3859
ISSN-L: 0013-4686
Volume: 466
Article number: 143059
DOI: 10.1016/j.electacta.2023.143059
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
116 Chemical sciences
Copyright information: © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (