Research output: Contribution to journal › Article › peer-review
Metal Ir coatings on endocardial electrode tips, obtained by MOCVD. / Vikulova, Evgeniia S.; Kal'nyi, Danila B.; Shubin, Yury V. et al.
In: Applied Surface Science, Vol. 425, 15.12.2017, p. 1052-1058.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Metal Ir coatings on endocardial electrode tips, obtained by MOCVD
AU - Vikulova, Evgeniia S.
AU - Kal'nyi, Danila B.
AU - Shubin, Yury V.
AU - Kokovkin, Vasily V.
AU - Morozova, Natalya B.
AU - Hassan, Aseel
AU - Basova, Tamara V.
PY - 2017/12/15
Y1 - 2017/12/15
N2 - The present work demonstrates the application of the Metal-Organic Chemical Vapor Deposition technique to fabricate metal iridium coatings onto the pole tips of endocardial electrodes. Using iridium (III) acetylacetonate as a volatile precursor, the target coatings were successfully applied to the working surface of cathodes and anodes of pacemaker electrodes in the flow type reactor in hydrogen atmosphere at deposition temperature of 550 °C. The coating samples were characterized by means of XRD, SEM, Raman- and XPS-spectroscopies. The formation of non-textured coatings with fractal-like morphology and 7–24 nm crystallite size has been realized. The electrochemical properties of the coatings were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The charge storage capacity values of the electrochemically activated samples were 17.0–115 mC cm−2 and 14.4–76.5 mC cm−2 for measurements carried out in 0.1 M sulfuric acid and in phosphate buffer saline solutions, respectively. A comparison of some characteristics of the samples obtained with commercially available cathode of pacemaker electrodes is also presented.
AB - The present work demonstrates the application of the Metal-Organic Chemical Vapor Deposition technique to fabricate metal iridium coatings onto the pole tips of endocardial electrodes. Using iridium (III) acetylacetonate as a volatile precursor, the target coatings were successfully applied to the working surface of cathodes and anodes of pacemaker electrodes in the flow type reactor in hydrogen atmosphere at deposition temperature of 550 °C. The coating samples were characterized by means of XRD, SEM, Raman- and XPS-spectroscopies. The formation of non-textured coatings with fractal-like morphology and 7–24 nm crystallite size has been realized. The electrochemical properties of the coatings were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The charge storage capacity values of the electrochemically activated samples were 17.0–115 mC cm−2 and 14.4–76.5 mC cm−2 for measurements carried out in 0.1 M sulfuric acid and in phosphate buffer saline solutions, respectively. A comparison of some characteristics of the samples obtained with commercially available cathode of pacemaker electrodes is also presented.
KW - Charge storage capacity
KW - Electrode
KW - Iridium coating
KW - MOCVD
KW - Pacemaker
KW - ACETYLACETONATE
KW - CHARGE-INJECTION
KW - CHEMICAL-VAPOR-DEPOSITION
KW - PLATINUM
KW - IRIDIUM OXIDE-FILMS
KW - NEURAL STIMULATION
KW - GROWTH
KW - SURFACE
KW - DEVICES
UR - http://www.scopus.com/inward/record.url?scp=85025121259&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2017.07.100
DO - 10.1016/j.apsusc.2017.07.100
M3 - Article
AN - SCOPUS:85025121259
VL - 425
SP - 1052
EP - 1058
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -
ID: 9400584