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N-alkyl-β-ketoiminate zinc complexes: Synthesis, structure, and reactivity in ring-opening polymerization of lactide. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Ethyl zinc 𝛽‐ketoiminates and 𝛽‐amidoenoates: The influence of precursor design on the deposition of highly conductive zinc oxide thin films via AACVD. Chempluschem 2022; 87:e202100537. [DOI: 10.1002/cplu.202100537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/26/2022] [Indexed: 11/07/2022]
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3
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Bhide MA, Manzi JA, Knapp CE, Carmalt CJ. Synthetic and Structural Studies of Ethyl Zinc β-Amidoenoates and β-Ketoiminates. Molecules 2021; 26:3165. [PMID: 34070641 PMCID: PMC8199139 DOI: 10.3390/molecules26113165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/16/2022] Open
Abstract
A set of heteroleptic ethyl zinc β-amidoenoates (1, 2) and β-ketoiminates (3) of the form [LZnEt]2 with varying steric bulk have been synthesised via the reaction of diethylzinc with β-aminoenoate ligands HL1 and HL2 and β-ketoimine HL3. These complexes have been characterised via 1H and 13C NMR, mass spectrometry and single-crystal X-ray diffraction, which unambiguously determined all three structures as dimeric species in the solid state. We observe the unusual dimerisation of 1 and 2 through coordination of the central zinc atom to the methine carbon of the second monomer, which gives these complexes high reactivity. The thermal properties of complex 3 are explored via thermal gravimetric analysis (TGA), to investigate their potential as single-source precursors to zinc oxide, which shows that 3 has a significantly lower decomposition temperature as compared to its bis-ligated counterpart [Zn(L3)2], which gives 3 promise as a single-source precursor to zinc oxide.
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Affiliation(s)
| | | | | | - Claire J. Carmalt
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK; (M.A.B.); (J.A.M.); (C.E.K.)
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4
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Syntheses, structures and catalysis of tetranuclear zinc N-alkoxide ketoiminate complexes for ring-opening polymerization of rac-lactide. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Mai L, Mitschker F, Bock C, Niesen A, Ciftyurek E, Rogalla D, Mickler J, Erig M, Li Z, Awakowicz P, Schierbaum K, Devi A. From Precursor Chemistry to Gas Sensors: Plasma-Enhanced Atomic Layer Deposition Process Engineering for Zinc Oxide Layers from a Nonpyrophoric Zinc Precursor for Gas Barrier and Sensor Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1907506. [PMID: 32346997 DOI: 10.1002/smll.201907506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 03/31/2020] [Accepted: 04/02/2020] [Indexed: 06/11/2023]
Abstract
The identification of bis-3-(N,N-dimethylamino)propyl zinc ([Zn(DMP)2 ], BDMPZ) as a safe and potential alternative to the highly pyrophoric diethyl zinc (DEZ) as atomic layer deposition (ALD) precursor for ZnO thin films is reported. Owing to the intramolecular stabilization, BDMPZ is a thermally stable, volatile, nonpyrophoric solid compound, however, it possesses a high reactivity due to the presence of Zn-C and Zn-N bonds in this complex. Employing this precursor, a new oxygen plasma enhanced (PE)ALD process in the deposition temperature range of 60 and 160 °C is developed. The resulting ZnO thin films are uniform, smooth, stoichiometric, and highly transparent. The deposition on polyethylene terephthalate (PET) at 60 °C results in dense and compact ZnO layers for a thickness as low as 7.5 nm with encouraging oxygen transmission rates (OTR) compared to the bare PET substrates. As a representative application of the ZnO layers, the gas sensing properties are investigated. A high response toward NO2 is observed without cross-sensitivities against NH3 and CO. Thus, the new PEALD process employing BDMPZ has the potential to be a safe substitute to the commonly used DEZ processes.
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Affiliation(s)
- Lukas Mai
- Inorganic Materials Chemistry, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
| | - Felix Mitschker
- Institute of Electrical Engineering and Plasma Technology, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
| | - Claudia Bock
- Microsystems Technology, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
| | - Alessia Niesen
- Forschung und Entwicklung, GB Sensorik, paragon GmbH & Co KGaA, Schwalbenweg 29, Delbrück, 33129, Germany
| | - Engin Ciftyurek
- Department of Material Science Institute of Experimental Condensed Matter Physics, Heinrich Heine University Düsseldorf, Universitätsstr. 1, Düsseldorf, 40225, Germany
| | - Detlef Rogalla
- RUBION, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
| | - Johannes Mickler
- Forschung und Entwicklung, GB Sensorik, paragon GmbH & Co KGaA, Schwalbenweg 29, Delbrück, 33129, Germany
| | - Matthias Erig
- Forschung und Entwicklung, GB Sensorik, paragon GmbH & Co KGaA, Schwalbenweg 29, Delbrück, 33129, Germany
| | - Zheshen Li
- Department of Physics and Astronomy - Centre for Storage Ring Facilities (ISA), Aarhus University, Aarhus, 8000, Denmark
| | - Peter Awakowicz
- Institute of Electrical Engineering and Plasma Technology, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
| | - Klaus Schierbaum
- Department of Material Science Institute of Experimental Condensed Matter Physics, Heinrich Heine University Düsseldorf, Universitätsstr. 1, Düsseldorf, 40225, Germany
| | - Anjana Devi
- Inorganic Materials Chemistry, Ruhr University Bochum, Universitätsstr. 150, Bochum, 44801, Germany
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6
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Frenzel P, Preuß A, Bankwitz J, Georgi C, Ganss F, Mertens L, Schulz SE, Hellwig O, Mehring M, Lang H. Synthesis of Mg and Zn diolates and their use in metal oxide deposition. RSC Adv 2019; 9:10657-10669. [PMID: 35515315 PMCID: PMC9062479 DOI: 10.1039/c9ra00585d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/20/2019] [Indexed: 11/21/2022] Open
Abstract
The synthesis of complexes [M(OCHMeCH2NMeCH2)2] (5, M = Mg; 7, M = Zn) is described. Treatment of MeHNCH2CH2NMeH (1) with 2-methyloxirane (2) gave diol (HOCHMeCH2NMeCH2)2 (3), which upon reaction with equimolar amounts of MR2 (4, M = Mg, R = Bu; 6, M = Zn, R = Et) gave 5 and 7. The thermal behavior and vapor pressure of 5 and 7 were investigated to show whether they are suited as CVD (= chemical vapor deposition) and/or spin-coating precursors for MgO or ZnO layer formation. Thermogravimetric (TG) studies revealed that 5 and 7 decompose between 80–530 °C forming MgO and ZnO as evidenced by PXRD studies. In addition, TG-MS-coupled experiments were carried out with 7 proving that decomposition occurs by M–O, C–O, C–N and C–C bond cleavages, as evidenced from the detection of fragments such as CH4N+, C2H4N+, C2H5N+, CH2O+, C2H2O+ and C2H3O+. The vapor pressure of 7 was measured at 10.4 mbar at 160 °C, while 5 is non-volatile. The layers obtained by CVD are dense and conformal with a somewhat granulated surface morphology as evidenced by SEM studies. In addition, spin–coating experiments using 5 and 7 as precursors were applied. The corresponding MO layer thicknesses are between 7–140 nm (CVD) or 80 nm and 65 nm (5, 7; spin-coating). EDX and XPS measurements confirm the formation of MgO and ZnO films, however, containing 12–24 mol% (CVD) or 5–9 mol% (spin-coating) carbon. GIXRD studies verify the crystalline character of the deposited layers obtained by CVD and the spin-coating processes. Mg and Zn containing precursors for the generation of metal oxide layers by CVD and/or spin-coating are described.![]()
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Affiliation(s)
- Peter Frenzel
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
| | - Andrea Preuß
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
| | - Jörn Bankwitz
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany
| | - Colin Georgi
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany
| | - Fabian Ganss
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Physics D-09107 Chemnitz Germany
| | - Lutz Mertens
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Coordination Chemistry D-09107 Chemnitz Germany
| | - Stefan E Schulz
- Fraunhofer Institute for Electronic Nano Systems (ENAS), Technologie-Campus 3 D-09126 Chemnitz Germany.,Technische Universität Chemnitz, Center for Microtechnologies D-09107 Chemnitz Germany
| | - Olav Hellwig
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Physics D-09107 Chemnitz Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research D-01328 Dresden Germany
| | - Michael Mehring
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Coordination Chemistry D-09107 Chemnitz Germany
| | - Heinrich Lang
- Technische Universität Chemnitz, Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry D-09107 Chemnitz Germany +49(0)371-531-21219 +49(0)371-531-21210
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7
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Sadlo A, Beer SMJ, Rahman S, Grafen M, Rogalla D, Winter M, Ostendorf A, Devi A. Tailored β-Ketoiminato Complexes of Iron: Synthesis, Characterization, and Evaluation towards Solution-Based Deposition of Iron Oxide Thin Films. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800094] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander Sadlo
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Sebastian M. J. Beer
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Shafiqur Rahman
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Markus Grafen
- Applied Laser Technologies; Faculty of Mechanical Engineering; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Detlef Rogalla
- RUBION; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Manuela Winter
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Andreas Ostendorf
- Applied Laser Technologies; Faculty of Mechanical Engineering; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Anjana Devi
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
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8
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Gasparotto A, Carraro G, Maccato C, Sada C, Balbuena J, Cruz-Yusta M, Sánchez L, Vodišek N, Lavrencic Štangar U, Barreca D. WO3-decorated ZnO nanostructures for light-activated applications. CrystEngComm 2018. [DOI: 10.1039/c7ce02148h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Calyx-like ZnO nanostructures decorated by WO3 nanoparticles are investigated for NOX degradation and self-cleaning end-uses.
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Affiliation(s)
- Alberto Gasparotto
- Department of Chemical Sciences
- Padova University and INSTM
- 35131 Padova
- Italy
| | - Giorgio Carraro
- Department of Chemical Sciences
- Padova University and INSTM
- 35131 Padova
- Italy
| | - Chiara Maccato
- Department of Chemical Sciences
- Padova University and INSTM
- 35131 Padova
- Italy
| | - Cinzia Sada
- Department of Physics and Astronomy
- Padova University and INSTM
- 35131 Padova
- Italy
| | - José Balbuena
- Department of Inorganic Chemistry and Engineering Chemistry
- Córdoba University
- 14071 Córdoba
- Spain
| | - Manuel Cruz-Yusta
- Department of Inorganic Chemistry and Engineering Chemistry
- Córdoba University
- 14071 Córdoba
- Spain
| | - Luis Sánchez
- Department of Inorganic Chemistry and Engineering Chemistry
- Córdoba University
- 14071 Córdoba
- Spain
| | - Nives Vodišek
- Laboratory for Environmental and Life Sciences
- Nova Gorica University
- 5001 Nova Gorica
- Slovenia
| | - Urška Lavrencic Štangar
- Laboratory for Environmental and Life Sciences
- Nova Gorica University
- 5001 Nova Gorica
- Slovenia
- Faculty of Chemistry and Chemical Technology
| | - Davide Barreca
- CNR-ICMATE and INSTM
- Department of Chemical Sciences Padova University
- 35131 Padova
- Italy
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9
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O’Donoghue R, Rahman S, Mallick B, Winter M, Rogalla D, Becker HW, Devi A. Molecular engineering of Ga-ketoiminates: synthesis, structure and evaluation as precursors for the additive-free spin-coated deposition of gallium oxide thin films. NEW J CHEM 2018. [DOI: 10.1039/c7nj04334a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
New gallium ketoiminate precursors with high solubility, favourable hydrolysis and decomposition route enabling additive free processing of Ga2O3 thin films.
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Affiliation(s)
- Richard O’Donoghue
- Inorganic Materials Chemistry
- Faculty of Chemistry and Biochemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | - Shafiqur Rahman
- Inorganic Materials Chemistry
- Faculty of Chemistry and Biochemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | - Bert Mallick
- Inorganic Materials Chemistry
- Faculty of Chemistry and Biochemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | - Manuela Winter
- Inorganic Materials Chemistry
- Faculty of Chemistry and Biochemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
| | | | | | - Anjana Devi
- Inorganic Materials Chemistry
- Faculty of Chemistry and Biochemistry
- Ruhr-University Bochum
- 44801 Bochum
- Germany
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10
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O’ Donoghue R, Peeters D, Rogalla D, Becker HW, Rechmann J, Henke S, Winter M, Devi A. Systematic molecular engineering of Zn-ketoiminates for application as precursors in atomic layer depositions of zinc oxide. Dalton Trans 2016; 45:19012-19023. [DOI: 10.1039/c6dt03571j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Molecular engineering of zinc ketoiminates leads to the optimisation of precursor properties in terms of volatiltiy, reactivity and thermal stability, highly relevant for water assisted ALD of ZnO.
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Affiliation(s)
| | - Daniel Peeters
- Inorganic Materials Chemistry
- Ruhr-University Bochum
- Germany
| | | | | | - Julian Rechmann
- Max-Planck-Institut für Eisenforschung GmbH
- D-40237 Düsseldorf
- Germany
| | | | - Manuela Winter
- Inorganic Materials Chemistry
- Ruhr-University Bochum
- Germany
| | - Anjana Devi
- Inorganic Materials Chemistry
- Ruhr-University Bochum
- Germany
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11
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Cosham SD, Kociok‐Köhn G, Johnson AL, Hamilton JA, Hill MS, Molloy KC, Castaing R. Synthesis and Characterization of Fluorinated β‐Ketoiminate Zinc Precursors and Their Utility in the AP‐MOCVD Growth of ZnO:F. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500536] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Samuel D. Cosham
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK http://www.bath.ac.uk/chemistry/contacts/academics/andrew_johnson/
| | - Gabriele Kociok‐Köhn
- Chemical Characterisation and Analysis Facility, Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Andrew L. Johnson
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK http://www.bath.ac.uk/chemistry/contacts/academics/andrew_johnson/
| | - Jeff A. Hamilton
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK http://www.bath.ac.uk/chemistry/contacts/academics/andrew_johnson/
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK http://www.bath.ac.uk/chemistry/contacts/academics/andrew_johnson/
| | - Kieran C. Molloy
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK http://www.bath.ac.uk/chemistry/contacts/academics/andrew_johnson/
| | - Rémi Castaing
- Chemical Characterisation and Analysis Facility, Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
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12
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Manzi JA, Knapp CE, Parkin IP, Carmalt CJ. Aerosol-Assisted Chemical-Vapour Deposition of Zinc Oxide from Single-Source β-Iminoesterate Precursors. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500416] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Banerjee M, Seidel RW, Winter M, Becker HW, Rogalla D, Devi A. Novel β-ketoiminato complexes of zirconium: synthesis, characterization and evaluation for solution based processing of ZrO2 thin films. Dalton Trans 2014; 43:2384-96. [PMID: 24302073 DOI: 10.1039/c3dt52335g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of tetrakis(diethylamido)zirconium(IV); [Zr(NEt2)4] with a series of β-ketoimines ({[RHN]C(CH3)=C(H)C(CH3)=O} where R is a functionalized side-chain; 4-(2-methoxyethylamino)pent-3-en-2-one, Hmeap; 4-(3-methoxypropylamino)pent-3-en-2-one, Hmpap; 4-(2-(dimethylamino)ethylamino)pent-3-en-2-one, Hdeap; 4-(3-(dimethylamino)propylamino)pent-3-en-2-one, Hdpap) leads to an amine substitution reaction that yielded novel monomeric heteroleptic mixed amido-ketoiminato complexes of the type bis(4-(2-methoxyethylamino)pent-3-en-2-onato)bis(diethylamido)zirconium(IV) (1), bis(4-(3-methoxypropylamino)pent-3-en-2-onato)bis(diethylamido)zirconium(IV) (2), and bis(4-(3-(dimethylamino)propylamino)pent-3-en-2-onato)bis(diethylamido)zirconium(IV) (3), and eight-coordinated homoleptic complexes tetrakis(4-(2-methoxyethylamino)pent-3-en-2-onato)zirconium(IV) (4) and tetrakis(4-(2-(dimethylamino)ethylamino)pent-3-en-2-onato)zirconium(IV) (5), depending on the ratio of the ligand to zirconium. Adopting a similar strategy with zirconium alkoxide, namely [Zr(O(i)Pr)4·(i)PrOH], with β-ketoimine Hmeap, leads to the formation of a dimer, bis(μ2-isopropoxo)bis(4-(2-methoxyethylamino)pent-3-en-2-onato)tetrakis(isopropoxo)dizirconium(IV) (6). The newly synthesised complexes were characterized by NMR spectroscopy, mass spectrometry, single crystal X-ray diffraction, elemental analysis and thermal analysis. The low decomposition temperature facilitated by the stepwise elimination of the ketominate ligand from the complex and the stability of the complexes obtained in air as well as in solution makes them highly suitable for solution based processing of ZrO2 thin films, which is demonstrated using compound 5 on Si(100) substrates. High quality ZrO2 films were obtained and were investigated for their structure, morphology, composition and optical properties. Low temperature crystallisation of ZrO2 is achieved by a simple chemical deposition process using the new class of Zr precursors and the films exhibit an optical transmittance above 90%.
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Affiliation(s)
- Manish Banerjee
- Inorganic Materials Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany.
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14
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Kim SJ, Xu K, Parala H, Beranek R, Bledowski M, Sliozberg K, Becker HW, Rogalla D, Barreca D, Maccato C, Sada C, Schuhmann W, Fischer RA, Devi A. Intrinsic Nitrogen-doped CVD-grown TiO2Thin Films from All-N-coordinated Ti Precursors for Photoelectrochemical Applications. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/cvde.201206996] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Bekermann D, Gasparotto A, Barreca D, Maccato C, Comini E, Sada C, Sberveglieri G, Devi A, Fischer RA. Co3O4/ZnO nanocomposites: from plasma synthesis to gas sensing applications. ACS APPLIED MATERIALS & INTERFACES 2012; 4:928-934. [PMID: 22260293 DOI: 10.1021/am201591w] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Herein, we describe the design, fabrication and gas sensing tests of p-Co(3)O(4)/n-ZnO nanocomposites. Specifically, arrays of (001) oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co(3)O(4) nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co(3)O(4) particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH(3)COCH(3), CH(3)CH(2)OH, NO(2)) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.
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Affiliation(s)
- D Bekermann
- Department of Chemistry, Padova University and INSTM, 35131 Padova, Italy
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