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Chemical vapour deposition of platinum films on electrodes for pacemakers: Novel precursors and their thermal properties
Author(s) -
Dorovskikh Svetlana I.,
Zharkova Galina I.,
Turgambaeva Asiya E.,
Krisyuk Vladislav V.,
Morozova Natalia B.
Publication year - 2017
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3654
Subject(s) - chemistry , cyclic voltammetry , chemical vapor deposition , thermogravimetry , x ray photoelectron spectroscopy , thermal decomposition , platinum , scanning electron microscope , electrochemistry , deposition (geology) , electrode , analytical chemistry (journal) , chemical engineering , inorganic chemistry , organic chemistry , materials science , paleontology , composite material , sediment , engineering , biology , catalysis
Air‐stable trimethylplatinum(IV) β‐diketonate complexes of general formula (CH 3 ) 3 Pt(L)Py (L = R 1 COCHCOR 2 ; R 1 = R 2 = CF 3 (hfac), t Bu (thd), CH 3 (acac); R 1 = CF 3 , R 2 = t Bu (ptac), CH 3 (tfac); Py = pyridine) have been synthesized in high yields. The thermal properties of (CH 3 ) 3 Pt(L)Py were investigated using thermogravimetry/differential thermal analysis and flow method to demonstrate their suitability as metal–organic chemical vapour deposition precursors. Thermolysis of vaporized (CH 3 ) 3 Pt(acac)Py in vacuum and in the presence of hydrogen or oxygen was studied under conditions of low‐pressure chemical vapour deposition using an original technique. Using this precursor, Pt films were deposited on electrodes for pacemakers under various conditions. The composition, structure, morphology and electrochemical properties of the deposited films were investigated using X‐ray diffraction, X‐ray photoelectron spectroscopy, scanning electron microscopy and cyclic voltammetry and LCR measurements. Pt films deposited in the presence of oxygen have a fractal‐like morphology as a result the highest values of real surface areas (851–943 mm 2 ) and capacity (5–8.5 μF mm −2 ).