Synthesis and characterization of iron tin oxide thin films from single source bimetallic precursors

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• 作者：Nasir Khan ; Amin Badshah ; Bhajan Lal ; Muhammad Azad Malik ; James Raftery ; Paul O鈥橞rien ; Ataf Ali Altaf
• 关键词：Ferrocene ; Tin carboxylate ; Bimetallic ; FeSnOx ; AACVD ; Single source precursor
• 刊名：Polyhedron
• 出版年：17 February, 2014
• 年：2014
• 卷：69
• 期：Complete
• 页码：40-47
• 全文大小：1551 K

文摘

Two new bimetallic precursors, [(C₅H₅)Fe(C₅H₄)COOSn(C₄H₉)₃] (A₁) and [(C₅H₅)Fe(C₅H₄)COOSn(C₆H₅)₃] (A₂), were synthesized by reacting 4-ferrocenylbenzoic acid with tributyltin chloride and triphenyltin chloride in refluxing toluene. Single crystal analysis showed the molecules to adopt the usual trigonal bipyramidal geometry, the ferrocene ligand being perpendicular to the phenyl ring and tin carboxylate cycle. Thermogravimetric studies revealed the decomposition of both synthesized compounds in the range 450-500 掳C, leaving a residue corresponding to the mass of SnO₂路1/2Fe₂O₃ for A₁ and SnO₂路Fe₂O₃ for A₂. The synthesized compounds were used as precursors for depositing FeSnO_x thin films by aerosol assisted chemical vapor deposition (AACVD) on a glass substrate (at 400 and 450 掳C). Scanning electron microscopy (SEM) of the thin films showed the formation of spherical globules at 450 掳C for both precursors, with the average roughness of the thin films being 2.48 and 3.41 nm for A₁ and A₂, respectively. The XRD pattern for A₁ at 450 掳C shows the incorporation of the iron in a substitutional position in the tin oxide lattice due to the small difference in their atomic radii. In the case of A₂, only spinel iron oxide (magnetite and maghemite) with the dominance of maghemite is found.