Development of rf plasma sputtered Al2O3–TiO2 multilayer broad band antireflecting coatings and its correlation with plasma parameters

Laha, Pinaki; Panda, Alaka; Mahapatra, S. K.; Barhai, P.K.; Das, Sudip Kumar; Banerjee, Indrani

doi:10.1016/j.apsusc.2011.09.118

Cited by 24 publications

(22 citation statements)

References 37 publications

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“…The two-dimensional image of the polymer blend (without salt) and polymer blend with Ö/Na + = 8 having optimum ionic conductivity are shown in Figure 13. [85]. Now, the surface roughness value increases to about 130 nm.…”

Section: Atomic Force Microscope (Afm) Analysismentioning

confidence: 93%

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Arya

Sharma

2018

J Solid State Electrochem

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The present paper report is focused toward the preparation of the flexible and freestanding blend solid polymer electrolyte films based on PEO-PVP complexed with NaPF6 by solution cast technique. The structural/morphological features of the synthesized polymer nanocomposite films have been investigated in detail using X-ray diffraction, Fourier transform infra-red spectroscopy, field emission scanning electron microscope, and atomic force microscopy techniques. The film PEO-PVP+NaPF6 (Ö/Na + = 8) exhibits highest ionic conductivity ~5.92×10 -6 S cm -1 at 40 °C and ~2.46×10 -4 S cm -1 at 100 °C. The temperature dependent conductivity shows Arrhenius type behavior and activation energy decreases with the addition of salt. The high temperature (100 °C) conductivity monitoring is done for the optimized PEO-PVP+NaPF6 (Ö/Na + =8) highly conductive system and the conductivity is still maintained stable up to 160 h (approx. 7 days). The thermal transitions parameters were measured by the differential scanning calorimetry (DSC) measurements. The prepared polymer electrolyte film displays the smoother surface in addition of salt and a thermal stability up to 300 o C. The ion transference number (tion) for the highest conducting sample is found to be 0.997 and evidence that the present system is ion dominating with negligible electron contribution. Both linear sweep voltammetry and cyclic voltammetry supports the use of prepared polymer electrolyte with long-term cycle stability and thermal stability for the solid state sodium ion batteries. Finally, a two peak percolation mechanism has been proposed on the basis of experimental findings.

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Section: Atomic Force Microscope (Afm) Analysismentioning

confidence: 93%

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Arya

Sharma

2018

J Solid State Electrochem

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“…Three peaks can be observed at binding energies of 529.6, 531, and 533.3 eV. The first and second peaks are attributed to lattice oxygen in Ti O and Al O bonds in TiO 2 and Al 2 O 3 , respectively [46,47]. The other peak at 533.3 eV is attributed to the oxygen in NO x [48].…”

Section: Xps Patternsmentioning

confidence: 87%

N-doped P25 TiO2–amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity

Zhao

Hao

et al. 2012

Journal of Hazardous Materials

133

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“…Many materials have been used as substrates in magnetron sputtering, including organic materials (cotton fabrics [31] and polycarbonate [18,32]), inorganic materials (glass [16,33,34] and quartz [35,36]), metals (wafers of alumina (Al 2 O 3 ) [37] zinc oxide (ZnO) [38], and stainless steel [39]), and minerals (sapphire [5]). Since the transmittance of PTFs affects the photocatalytic efficiency, materials such as glass and quartz are widely used as substrates due to their high transmittance.…”

Section: Substrate Typementioning

confidence: 99%

“…Theoretically, for a well-balanced magnetron, the power per sputtered adatom increases with increasing total sputtering power, delivering more energy to the growing film and thus improving densification. Therefore, a higher refractive index (n) means a denser film [34] and a finer film nano/micro-structure [37,68,69]. In addition, the refractive index of a transparent thin film is directly proportional to its electronic polarization, which is in turn inversely proportional to the inter-atomic separation [1].…”

Section: Sputtering Powermentioning

confidence: 99%

“…The effects of the argon/oxygen ratio on the photocatalytic activity of TiO 2 films have been extensively investigated. Many researchers have found that a lot of properties of TiO 2 film are affected by the argon/oxygen ratio in magnetron sputtering, including the deposition rate [62,74,82,102,103], grain size and surface roughness [37,76,87,104], crystallinity and surface chemical composition [33,86], and optical properties [1,37,62,105]. The dissociation energy of argon is about 15.76 eV and that of oxygen is about 48.77 eV.…”

Section: Argon/oxygen Ratiomentioning

confidence: 99%

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A Review on the Pathways of the Improved Structural Characteristics and Photocatalytic Performance of Titanium Dioxide (TiO2) Thin Films Fabricated by the Magnetron-Sputtering Technique

Wang

Rahman

et al. 2020

Catalysts

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Titanium dioxide (TiO2) thin films are used for a broad range of applications such as wastewater treatment, photocatalytic degradation activity, water splitting, antibacterial and also in biomedical applications. There is a wide range of synthesis techniques for the deposition of TiO2 thin films, such as chemical vapor deposition (CVD) and physical vapor deposition (PVD), both of which are well known deposition methods. Layer by layer deposition with good homogeneity, even thickness and good adhesive nature is possible by using the PVD technique, with the products being used for photocatalytic applications. This review studies the effects of magnetron sputtering conditions on TiO2 films. This innovative technique can enhance the photocatalytic activity by increasing the thickness of the film higher than any other methods. The main purpose of this article is to review the effects of DC and RF magnetron sputtering conditions on the preparation of TiO2 thin films for photocatalysis. The characteristics of TiO2 films (i.e., structure, composition, and crystallinity) are affected significantly by the substrate type, the sputtering power, the distance between substrate and target, working pressure, argon/oxygen ratio, deposition time, substrate temperature, dopant types, and finally the annealing treatment. The photocatalytic activity and optical properties, including the degree of crystallinity, band gap (Eg), refractive index (n), transmittance (T), and extinction coefficient (k), of TiO2 films are dependent on the above- mentioned film characteristics. Optimal TiO2 films should have a small particle size, a strong degree of crystallinity, a low band gap, a low contact angle, a high refractive index, transmittance, and extinction coefficient. Finally, metallic and nonmetallic dopants can be added to enhance the photocatalytic activity of TiO2 films by narrowing the band gap.

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Development of rf plasma sputtered Al2O3–TiO2 multilayer broad band antireflecting coatings and its correlation with plasma parameters

Cited by 24 publications

References 37 publications

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

Optimization of salt concentration and explanation of two peak percolation in blend solid polymer nanocomposite films

N-doped P25 TiO2–amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity

A Review on the Pathways of the Improved Structural Characteristics and Photocatalytic Performance of Titanium Dioxide (TiO2) Thin Films Fabricated by the Magnetron-Sputtering Technique

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