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

Elli Leppänen, Eero Gustafsson, Niklas Wester, Ilkka Varjos, Sami Sainio, Tomi Laurila*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Downloads (Pure)


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.

Original languageEnglish
Article number143059
Number of pages9
JournalElectrochimica Acta
Publication statusPublished - 20 Oct 2023
MoE publication typeA1 Journal article-refereed


  • Electrochemistry
  • Single-walled carbon nanotubes
  • Structure-property relationship
  • X-ray absorption spectroscopy


Dive into the research topics of 'Geometrical and chemical effects on the electrochemistry of single-wall carbon nanotube (SWCNT) network electrodes'. Together they form a unique fingerprint.

Cite this