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Sensors 2013, 13(5), 5700-5711; doi:10.3390/s130505700
Article

UV/Vis Spectroelectrochemistry as a Tool for Monitoring the Fabrication of Sensors Based on Silver Nanoparticle Modified Electrodes

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Received: 10 March 2013; in revised form: 23 April 2013 / Accepted: 23 April 2013 / Published: 2 May 2013
(This article belongs to the Special Issue Novel Tools in Electrochemical Sensing)
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Abstract: A new controlled current multipulse methodology has been developed to modify the screen-printed electrode surface with silver nanoparticles (AgNPs). Spectroelectrochemistry has provided not only information about the type of nanoparticles (NPs) deposited on the electrode surface, but also about the electrosynthesis process. Small NPs without plasmon band are initially generated. Next, these nuclei grow to form bigger NPs in the reduction pulses with a characteristic plasmon band centered at 400 nm. Most of the NPs are generated during the first reduction pulses and a linear growth of the absorbance at a lower reaction rate was obtained in the subsequent pulses. Oxidation pulses do not redissolve completely silver NPs but only partially, meaning that very stable NPs are generated. AgNPs-modified electrodes have been successfully used to determine hydrogen peroxide. Spectroelectrochemistry has also yielded very useful information to understand the voltammetric signal obtained during the reduction of H2O2 on silver modified electrodes.
Keywords: UV-Vis spectroelectrochemistry; silver nanoparticles; screen-printed electrodes; electrochemistry UV-Vis spectroelectrochemistry; silver nanoparticles; screen-printed electrodes; electrochemistry
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.

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MDPI and ACS Style

Fernández-Blanco, C.; Colina, Á.; Heras, A. UV/Vis Spectroelectrochemistry as a Tool for Monitoring the Fabrication of Sensors Based on Silver Nanoparticle Modified Electrodes. Sensors 2013, 13, 5700-5711.

AMA Style

Fernández-Blanco C, Colina Á, Heras A. UV/Vis Spectroelectrochemistry as a Tool for Monitoring the Fabrication of Sensors Based on Silver Nanoparticle Modified Electrodes. Sensors. 2013; 13(5):5700-5711.

Chicago/Turabian Style

Fernández-Blanco, Cristina; Colina, Álvaro; Heras, Aránzazu. 2013. "UV/Vis Spectroelectrochemistry as a Tool for Monitoring the Fabrication of Sensors Based on Silver Nanoparticle Modified Electrodes." Sensors 13, no. 5: 5700-5711.



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