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Proceedings 2017, 1(4), 288; doi:10.3390/proceedings1040288

Towards Nanostructured ITO-Based Electrochemical Sensors: Fabrication, Characterization and Functionalization

Departament d’Enginyeries, Electrònica, Universitat de Barcelona, C/Martí i Franquès 1, E-08028 Barcelona, Spain
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
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Published: 16 August 2017
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Abstract

The need for miniaturized, low-cost and ultrasensitive electrochemical sensors has motivated the search and study of new nanostructured materials. We propose nanostructured indium tin oxide (ITO) electrodes as a promising platform due to their good electrical conductivity, transparency to visible wavelengths and high surface-to-volume ratio. The nanostructured electrodes were fabricated by electron beam evaporation, and electrochemical techniques were used to quantify more than a 40% increase in electrochemical surface area compared to thin ITO films. The electrodes were derivatized with organosilanes and coated with a molecule providing redox activity. Indeed, an increase in detectability of more than 400% was observed with respect to thin films, indicating the potential viability of nanostructured ITO-based electrochemical biosensors.
Keywords: indium tin oxide; ITO; cyclic voltammetry; organosilane; XPS; FTIR; 6-(ferrocenyl)hexanethiol; electrochemical sensors indium tin oxide; ITO; cyclic voltammetry; organosilane; XPS; FTIR; 6-(ferrocenyl)hexanethiol; electrochemical sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pruna, R.; Palacio, F.; López, M. Towards Nanostructured ITO-Based Electrochemical Sensors: Fabrication, Characterization and Functionalization. Proceedings 2017, 1, 288.

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