Amorphous carbon thin film electrodes with intrinsic Pt-gradient for hydrogen peroxide detection

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Amorphous carbon thin film electrodes with intrinsic Pt-gradient for hydrogen peroxide detection. / Isoaho, Noora; Wester, Niklas; Peltola, Emilia; Johansson, Leena Sisko; Boronat, Ana; Koskinen, Jari; Feliu, Juan; Climent, Victor; Laurila, Tomi.

In: Electrochimica Acta, Vol. 251, 10.10.2017, p. 60-70.

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@article{1346bed62df745e0904fb1131ff559cb,
title = "Amorphous carbon thin film electrodes with intrinsic Pt-gradient for hydrogen peroxide detection",
abstract = "Nanoscale amorphous carbon thin films with intrinsic Pt gradient show great promise as new electrode materials for electrochemical detection of hydrogen peroxide. Embedding the Pt particles in the carbon matrix during the fabrication process allows tighter integration than, for example, adding them after the fabrication on top of the substrate. Especially, this approach can offer excellent electrochemical properties combined with CMOS compatibility, which is crucial for further device development. Here we provide extensive in depth electrochemical and physicochemical characterization of these novel materials by cyclic voltammetry (CV), chronoamperometry (CA), rotating disk electrode (RDE) experiments, transmission electron microscopy (TEM), Raman spectroscopy, x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Equipped with these detailed results on these materials we proceed to present some suggestions how the physicochemical properties correlate with the results from electrochemical measurements. (i) It is shown that coarsening of the initially very finely dispersed structure occurs both under electron bombardment during TEM imaging as well as during cyclic voltammetry in H2SO4. (ii) Further, it is shown that OH is adsorbed on small Pt islands much more strongly compared to the bulk Pt, which may heavily influence hydrogen peroxide redox reactions on these Pt-containing amorphous carbon films. (iii) Finally, we proceed to demonstrate that despite these complications, these materials show linear response for hydrogen peroxide reduction in neutral phosphate buffered saline combined with very fast response times.",
keywords = "Carbon, Hydrogen peroxide, Platinum, Sensors, Thin films",
author = "Noora Isoaho and Niklas Wester and Emilia Peltola and Johansson, {Leena Sisko} and Ana Boronat and Jari Koskinen and Juan Feliu and Victor Climent and Tomi Laurila",
year = "2017",
month = "10",
day = "10",
doi = "10.1016/j.electacta.2017.08.110",
language = "English",
volume = "251",
pages = "60--70",
journal = "Electrochimica Acta",
issn = "0013-4686",

}

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TY - JOUR

T1 - Amorphous carbon thin film electrodes with intrinsic Pt-gradient for hydrogen peroxide detection

AU - Isoaho, Noora

AU - Wester, Niklas

AU - Peltola, Emilia

AU - Johansson, Leena Sisko

AU - Boronat, Ana

AU - Koskinen, Jari

AU - Feliu, Juan

AU - Climent, Victor

AU - Laurila, Tomi

PY - 2017/10/10

Y1 - 2017/10/10

N2 - Nanoscale amorphous carbon thin films with intrinsic Pt gradient show great promise as new electrode materials for electrochemical detection of hydrogen peroxide. Embedding the Pt particles in the carbon matrix during the fabrication process allows tighter integration than, for example, adding them after the fabrication on top of the substrate. Especially, this approach can offer excellent electrochemical properties combined with CMOS compatibility, which is crucial for further device development. Here we provide extensive in depth electrochemical and physicochemical characterization of these novel materials by cyclic voltammetry (CV), chronoamperometry (CA), rotating disk electrode (RDE) experiments, transmission electron microscopy (TEM), Raman spectroscopy, x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Equipped with these detailed results on these materials we proceed to present some suggestions how the physicochemical properties correlate with the results from electrochemical measurements. (i) It is shown that coarsening of the initially very finely dispersed structure occurs both under electron bombardment during TEM imaging as well as during cyclic voltammetry in H2SO4. (ii) Further, it is shown that OH is adsorbed on small Pt islands much more strongly compared to the bulk Pt, which may heavily influence hydrogen peroxide redox reactions on these Pt-containing amorphous carbon films. (iii) Finally, we proceed to demonstrate that despite these complications, these materials show linear response for hydrogen peroxide reduction in neutral phosphate buffered saline combined with very fast response times.

AB - Nanoscale amorphous carbon thin films with intrinsic Pt gradient show great promise as new electrode materials for electrochemical detection of hydrogen peroxide. Embedding the Pt particles in the carbon matrix during the fabrication process allows tighter integration than, for example, adding them after the fabrication on top of the substrate. Especially, this approach can offer excellent electrochemical properties combined with CMOS compatibility, which is crucial for further device development. Here we provide extensive in depth electrochemical and physicochemical characterization of these novel materials by cyclic voltammetry (CV), chronoamperometry (CA), rotating disk electrode (RDE) experiments, transmission electron microscopy (TEM), Raman spectroscopy, x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Equipped with these detailed results on these materials we proceed to present some suggestions how the physicochemical properties correlate with the results from electrochemical measurements. (i) It is shown that coarsening of the initially very finely dispersed structure occurs both under electron bombardment during TEM imaging as well as during cyclic voltammetry in H2SO4. (ii) Further, it is shown that OH is adsorbed on small Pt islands much more strongly compared to the bulk Pt, which may heavily influence hydrogen peroxide redox reactions on these Pt-containing amorphous carbon films. (iii) Finally, we proceed to demonstrate that despite these complications, these materials show linear response for hydrogen peroxide reduction in neutral phosphate buffered saline combined with very fast response times.

KW - Carbon

KW - Hydrogen peroxide

KW - Platinum

KW - Sensors

KW - Thin films

UR - http://www.scopus.com/inward/record.url?scp=85028325892&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2017.08.110

DO - 10.1016/j.electacta.2017.08.110

M3 - Article

VL - 251

SP - 60

EP - 70

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -

ID: 14998211