Wettability and photochromic behaviour of Molybdenum oxide thin films

Allogho, Guy-Germain; Ashrit, P. V.

doi:10.1016/j.tsf.2011.09.068

Cited by 21 publications

(7 citation statements)

References 17 publications

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“…After coating the PVA-DT or PM/PVA-DT blends, their initial contact angle still remained around 73°, which was attributable to hydroxyl groups from the PVA or DT polymer. Practical applications of the photochromic response materials may be limited to some extent due to its hydrophilicity [30]. Here, an OTS reagent was used to modify the wood surface to be hydrophobic.…”

Section: Wettability Of the Modified Photochromic Wood Surfacesmentioning

confidence: 99%

Fabrication of smart coatings based on wood substrates with photoresponsive behavior and hydrophobic performance

Hui

Huang³

et al. 2015

Materials & Design

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Section: Wettability Of the Modified Photochromic Wood Surfacesmentioning

confidence: 99%

Fabrication of smart coatings based on wood substrates with photoresponsive behavior and hydrophobic performance

Hui

Huang³

et al. 2015

Materials & Design

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“…So far, molybdenum oxides have been prepared by a variety of physical and chemical techniques: pulsed laser deposition [18], chemical vapour deposition [19], sputtering [20], thermal evaporation [21], spray pyrolysis [22], electrodeposition [23,24], anodization [25], and sol-gel [26]. Electrochemical methods are advantageous for several reasons.…”

Section: Introductionmentioning

confidence: 99%

Structurally and mechanically tunable molybdenum oxide films and patterned submicrometer structures by electrodeposition

Quintana

Varea

Guerrero

et al. 2015

Electrochimica Acta

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Abstract1.5 m-thick molybdenum oxide films have been electrodeposited potentiostatically from 0.2 M Na 2 MoO 4 electrolyte onto indium tin oxide (ITO)/glass substrates at pH = 1, 6 and 9. The influence of cetyltrimethylammonium bromide (CTAB) surfactant on films' adhesion, morphology, degree of porosity, molybdenum speciation, and crystallographic structure has been systematically investigated. The addition of CTAB (0.01 M) to the bath clearly improves film adherence to the substrate, reduces cracking, and increases crystallinity. This has an impact on the physical properties of the films. In particular, both hardness (H) and Young's modulus (E) increase, as determined from nanoindentation tests.The growth of ordered arrays of molybdenum oxide submicrometer structures, including pillars and stripes, by electrodeposition onto e-beam lithographed Au/Ti/Si substrates is also reported.

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“…Kocak et al [12] realized the catalytic activity of electrodeposited MoO3 for nitrite oxidation. Allogho and Ashrit [13] reported on the photochromic activity of MoO3 films prepared by thermal evaporation to gauge the water content. Molybdenum oxide is a promising candidate for a back contact layer for cadmium telluride solar cells in superstrate configuration because of its high work function, possibly reducing the back contact barrier Chang et al [3] reported on the effect of air annealing at temperatures in the range 493 -823 K in RF magnetron sputtered MoO3 films.…”

Section: Introductionmentioning

confidence: 99%

Post-deposition Annealing Controlled Structural And Optical Properties Of RF Magnetron Sputtered MoO3 Films

Subbarayudu¹,

Madhavi²,

Uthanna³

2013

Adv. Mater. Lett.

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MoO3 films were deposited on Corning glass and silicon substrates held at room temperature (303 K) by RF magnetron sputtering of metallic molybdenum target at a fixed oxygen partial pressure of 4x10 -4 mbar and sputter pressure of 4x10 -2 mbar. The as deposited films were annealed in air at different temperatures in the range 473 -673 K. X-ray diffraction studies suggest that the as-deposited and the films annealed at 473 K were amorphous in nature, while those annealed at 573 and 673 K were polycrystalline with mixed phases of αorthorhombic and βmonoclinic MoO3. Scanning electron microscope images of the films annealed at 573 and 673 K exhibited nanoflower like and nanodisk like structures due to improvement in the crystallinity. Fourier transform infrared studies showed the characteristic vibrations of MoO3 with shift in the vibrational modes of Mo = O and Mo -O -Mo with increase of annealing temperature. The optical absorption edge of the films shifted towards lower wavelengths side with increase of annealing temperature. Optical band gap of as-deposited films was 2.98 eV with refractive index 2.01, while those annealed at 673 K showed the optical band gap of 3.15 eV and refractive index of 2.08. The MoO3 films annealed at 673 K were of nanocrystalline with crystallite size of 39 nm with optical band gap of 3.15 eV and refractive index of 2.08 were favorable for electron blocking and hole-selective layers in bulk-heterojuction solar cells.

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Wettability and photochromic behaviour of Molybdenum oxide thin films

Cited by 21 publications

References 17 publications

Fabrication of smart coatings based on wood substrates with photoresponsive behavior and hydrophobic performance

Fabrication of smart coatings based on wood substrates with photoresponsive behavior and hydrophobic performance

Structurally and mechanically tunable molybdenum oxide films and patterned submicrometer structures by electrodeposition

Post-deposition Annealing Controlled Structural And Optical Properties Of RF Magnetron Sputtered MoO3 Films

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