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Volatile Iridium and Platinum MOCVD Precursors: Chemistry, Thermal Properties, Materials and Prospects for Their Application in Medicine. COATINGS 2021. [DOI: 10.3390/coatings11010078] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Interest in iridium and platinum has been steadily encouraged due to such unique properties as exceptional chemical inertia and corrosion resistance, high biological compatibility, and mechanical strength, which are the basis for their application in medical practice. Metal-organic chemical vapor deposition (MOCVD) is a promising method to fabricate Ir and Pt nanomaterials, multilayers, and heterostructures. Its advantages include precise control of the material composition and microstructure in deposition processes at relatively low temperatures onto non-planar substrates. The development of MOCVD processes is inextricably linked with the development of the chemistry of volatile precursors, viz., specially designed coordination and organometallic compounds. This review describes the synthesis methods of various iridium and platinum precursors, their thermal properties, and examples of the use of MOCVD, including formation of films for medical application and bimetallics. Although metal acetylacetonates are currently the most widely used precursors, the recently developed heteroligand Ir(I) and Pt(IV) complexes appear to be more promising in both synthetic and thermochemical aspects. Their main advantage is their ability to control thermal properties by modifying several types of ligands, making them tunable to deposit films onto different types of materials and to select a combination of compatible compounds for obtaining the bimetallic materials.
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Dorovskikh SI, Krisyuk VV, Mirzaeva IV, Komarov VY, Trubin SV, Turgambaeva AE, Morozova NB. The volatile trimethylplatinum(IV) complexes: Effect of β-diketonate substituents on thermal properties. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dorovskikh SI, Vikulova ES, Kal'nyi DB, Shubin YV, Asanov IP, Maximovskiy EA, Gutakovskii AK, Morozova NB, Basova TV. Bimetallic Pt,Ir-containing coatings formed by MOCVD for medical applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:69. [PMID: 31165268 DOI: 10.1007/s10856-019-6275-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 05/27/2019] [Indexed: 06/09/2023]
Abstract
Biocompatible PtxIr(1-x) layers combining high mechanical strength of the iridium component and outstanding corrosion resistance of the platinum component providing reversible charge transfer reactions in the living tissue are one of the important materials required for implantable medical electrodes. The modern trend to complicate the shape and reduce the electrode dimensions includes the challenge to develop precise methods to obtain such bimetallic coatings with enhanced surface area and advanced electrochemical characteristics. Herein, PtxIr(1-x) coatings were firstly obtained on cathode and anode pole tips of endocardial electrodes for pacemakers using chemical vapor deposition technique. To deposit PtxIr(1-x) coatings with a wide range of metal ratios (x = 0.5-0.9) the combination of acetylacetonate-based volatile precursors with compatible thermal characteristics was used for the first time. The expected metal ratio in the coatings was regulated by a partial pressure of the precursor vapors in the reaction zone and was in the good agreement with its real value measured by various methods, including energy-dispersive and wavelength dispersive spectroscopy, X-ray photoelectron spectroscopy. According to the X-ray powder diffraction analysis, PtxIr(1-x) coatings consisted of fcc-PtxIr(1-x) solid solution phases. The microscopy data confirmed the formation of PtxIr1-x coatings with the enhanced surface areas. The effect of electrochemical activation on the surface composition and morphology of the samples was studied. The electrochemical characteristics of samples were estimated from cyclic voltammetry and electrochemical impedance spectroscopy data. The charge storage capacity (CSC) values of activated samples were in the range of 19-108 mCcm-2 (phosphate buffer saline solution, 100 mV/s).
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Affiliation(s)
- Svetlana I Dorovskikh
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia.
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia.
| | - Evgeniia S Vikulova
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
| | - Danila B Kal'nyi
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
| | - Yury V Shubin
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
| | - Igor P Asanov
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
| | - Evgeniy A Maximovskiy
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
| | - Anton K Gutakovskii
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
- Rzhanov Institute of Semiconductor Physics SB RAS, Lavrentiev av. 13, 630090, Novosibirsk, Russia
| | - Natalya B Morozova
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
| | - Tamara V Basova
- Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentiev av. 3., 630090, Novosibirsk, Russia
- Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia
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Dorovskikh SI, Zharkova GI, Turgambaeva AE, Krisyuk VV, Morozova NB. Chemical vapour deposition of platinum films on electrodes for pacemakers: Novel precursors and their thermal properties. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3654] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Svetlana I. Dorovskikh
- Nikolaev Institute of Inorganic Chemistry; 630090 Novosibirsk Russia
- Novosibirsk State University; 630090 Novosibirsk Russia
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