Effect of substrate temperature on the structural and optical properties of MoO3 thin films prepared by spray pyrolysis technique

Bouzidi, A.; Benramdane, N.; Tabet-Derraz, H.; Mathieu, C.; Khelifa, B.; Desfeux, Rachel

doi:10.1016/s0921-5107(02)00385-9

Cited by 176 publications

(79 citation statements)

References 13 publications

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“…The optical band gaps computed from the above relation are estimated to be 3.60 and 3.21 eV (when n = 2) for undoped and AuNP doped MoO 3 films, respectively. The value of the optical band-gap energy for the undoped MoO 3 film is in good agreement with the reported values for this non-stoichiometric oxide 53,54,57 . Once MoO 3 films are doped with AuNPs, the band gap decreases to 3.21 eV.…”

Section: Optical Propertiessupporting

confidence: 90%

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Castillo

Buono-Core

Manzur

et al. 2016

J. Chil. Chem. Soc.

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Gold nanoparticles (AuNPs) were deposited by DC-magnetron sputtering onto molybdenum trioxide (MoO 3 ) thin films grown by Photochemical MetalOrganic Deposition (PMOD) on Si(100) and borosilicate glass substrates. The chemical, optical and morphology properties of the films were studied by UV/ Vis Spectroscopy, Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS), and X-Ray Diffraction (XRD). SEM revealed that AuNPs formed after 5 s of sputtering. AuNPs are spherical and have both an average diameter of 18 nm and a relatively narrow size distribution. As the deposition time increases, larger structures are formed by an aggregation of AuNPs. XPS studies of the AuNP/MoO 3 films on Si(100) showed the presence of Mo(VI) and Mo(V), which indicated that the films were primarily non-stoichiometric molybdenum oxides. The occurrence of oxygen vacancies in the substrate play an important role to stabilize the AuNPs. , gas sensing 11-13 and catalysis [14][15][16][17][18][19][20] . KeywordsAuNPs have been prepared using various approaches that can be divided into physical and chemical methods. Included among the chemical methods are reduction 21, photochemistry using UV irradiation 22,23 , photochemistry using X-ray irradiation 24 , sonochemistry 25,26 , and sonoelectrochemistry 27 . A physical method that can be used is cathodic deposition using magnetron sputtering. This physical method has several advantages over chemical syntheses, such as a lack of surface contamination from solvent or precursor molecules, which may be important for subsequent assays and/or applications. Furthermore, physical deposition is cheaper and faster and does not damage the environment [28][29][30] .Gold catalysts with selected support materials can efficiently promote many reactions that normally occur at much higher temperatures or with lower selectivity when catalyzed by other metals. It has been shown that AuNPs supported on metal oxides exhibit unique activity at room temperature because of a meta-stable interatomic bonding between gold atoms 31 . It has been shown that substrates such as ceria 32 , titania 33,34 and titanates 35 can stabilize AuNPs in which oxygen vacancies play an important role in the stabilizing effect. It is generally accepted that interfaces provide adequate sites for chemical reactions, and metallic Au surfaces are required as reservoirs for a determined reactant 36,37 . Gold nanoparticles also play an important role in the development of chemical and biological sensors. A sensor usually has two functional components: one component selectively binds with the analyte, and the other provides transduction of this interaction into a detectable signal 38 . Considering the chromogenic properties of molybdenum oxide on the one hand and the catalytic properties of gold nanoparticles on the other, a binary system that is formed by molybdenum oxide coated with gold nanoparticles could potentially be of use in the field of catalysis and/or in the fabrication of new specific sensors. For example, i...

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Section: Optical Propertiessupporting

confidence: 90%

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Castillo

Buono-Core

Manzur

et al. 2016

J. Chil. Chem. Soc.

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Section: Introductionmentioning

confidence: 99%

“…Some of the molybdenum oxide compounds are thermodynamically stable normal phase of orthorhombic (a-MoO 3 ), metastable phase of monoclinic (b-MoO 3 ) and the hexagonal phase (h-MoO 3 ) [1][2][3][4][5][6][7][8]. The orthorhombic MoO 3 has a layered structure, containing two layers of octahedral MoO 6 , held together by double covalent forces in the a and c axes; contiguous layers are kept together along the b axes by Van der Waal's forces [6]. MoO 3 thin films have attracted much interest for technological and industrial applications in recent years, including elements for energy efficient window technology, optical switching, coating high-density, memory devices, gas sensors, and lithium ion batteries [1][2][3][4][5][6][7][8][9][10][11][12]15].…”

Section: Introductionmentioning

confidence: 99%

“…The orthorhombic MoO 3 has a layered structure, containing two layers of octahedral MoO 6 , held together by double covalent forces in the a and c axes; contiguous layers are kept together along the b axes by Van der Waal's forces [6]. MoO 3 thin films have attracted much interest for technological and industrial applications in recent years, including elements for energy efficient window technology, optical switching, coating high-density, memory devices, gas sensors, and lithium ion batteries [1][2][3][4][5][6][7][8][9][10][11][12]15]. In addition, the optical property of MoO 3 is higher than those of many other inorganic materials because the incorporator indicates stronger and more uniform absorption of light in its colored state [13].…”

Section: Introductionmentioning

confidence: 99%

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Structural and optical properties of nanocrystalline α-MoO3 thin films prepared at different annealing temperatures

2015

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Nanocrystalline a-MoO 3 thin films were prepared successfully by thermal annealing of molybdenum (Mo) thin films deposited on quartz and silicon substrates using DC magnetron sputtering method. The influence of annealing temperatures ranging from 400 to 1,000°C on the structural, morphological and optical properties of the prepared films was investigated by X-ray diffraction, Fourier transform infrared spectrophotometer (FTIR) atomic force microscopic and UV-vis spectroscopy, respectively. The results show that the crystallinity and surface morphology of the films are strongly dependent on the annealing temperature. Also, the optimum annealing temperature of Mo films in our experiment was 600°C and the films formed at this temperature exhibit only the (0k0) reflections and indicated the layered structure of a-MoO 3 . The FTIR spectra confirm the formation of MoO 3 . The transmittance of the MoO 3 films on quartz substrate was improved with increasing annealing temperature.

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“…Transition metal oxides such as molybdenum oxides are used in many industrial applications and have gained an interest from both technological and scientific points of view [11][12][13][14][15]. The main fields of industrial applications are catalysis, sorption, energy storage, molecular electronics, optical materials, and ceramics [16,17].…”

Section: Introductionmentioning

confidence: 99%

The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[3.3.1.13,7]decane) bis(μ4
Kruszyński
¹
,
Sierański
²
,
Lewinski
³

et al. 2012
International Journal of Inorganic Chemistry
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0
0
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The reaction of molybdophosphoric acid with zinc carbonate followed by addition of hmta leads to formation of a triclinic polymorph of bis (3,5,7-triaza-1-azoniatricyclo[3.3.1.1 3,7 ]decane) bis(μ 4 -oxo)-tris(μ 3 -oxo)-nonakis(μ 2 -oxo)-nonaaqua-decaoxohepta-molybdenum-di-zinc(II) dihydrate in a one pot simple reaction. The obtained compound has been characterised by IR, UV-Vis spectroscopy, elemental analysis, and X-ray crystallography. A detailed comparison between both polymorphic forms: triclinic a = 22.758Å, b = 24.702Å, c = 31.995Å, α = 101.206• , β = 103.256• , and V = 16203.8Å 3 and monoclinic a = 43.120Å, b = 12.399Å, c = 16.285Å, α = 90.00• , β = 111.12 • , γ = 90.00• , and V = 8122Å 3 was performed. The influence of the synthesis procedure on polymorph formation was described.

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Effect of substrate temperature on the structural and optical properties of MoO3 thin films prepared by spray pyrolysis technique

Cited by 176 publications

References 13 publications

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Structural and optical properties of nanocrystalline α-MoO3 thin films prepared at different annealing temperatures

The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[3.3.1.13,7]decane) bis(μ4
Kruszyński
¹
,
Sierański
²
,
Lewinski
³

et al. 2012
International Journal of Inorganic Chemistry
0
0
0
0
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Effect of substrate temperature on the structural and optical properties of MoO3 thin films prepared by spray pyrolysis technique

Cited by 176 publications

References 13 publications

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Molybdenum Trioxide Thin Films Doped With Gold Nanoparticles Grown by a Sequential Methodology: Photochemical Metal-Organic Deposition (Pmod) and Dc-Magnetron Sputtering

Structural and optical properties of nanocrystalline α-MoO3 thin films prepared at different annealing temperatures

The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[3.3.1.13,7]decane) bis(μ4Kruszyński1, Sierański2, Lewinski3 et al. 2012International Journal of Inorganic Chemistry0000View full textAdd to dashboardCite

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The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[3.3.1.13,7]decane) bis(μ4
Kruszyński
¹
,
Sierański
²
,
Lewinski
³

et al. 2012
International Journal of Inorganic Chemistry
0
0
0
0
View full text Add to dashboard Cite