Fractal and statistical characterization of Ti thin films deposited by RF-magnetron sputtering: The effects of deposition time

Astinchap, Bandar

doi:10.1016/j.ijleo.2018.10.050

Cited by 27 publications

(8 citation statements)

References 24 publications

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“…extract affects the statistical parameters of the surface of kefir biofilms. The study of surface parameters by the AFM technique provides several important aspects of biofilms, such as roughness, volume, peak distribution, height distribution, and texture homogeneity (Astinchap, 2019; Arman et al, 2015; Ansari et al, 2017; Yadav et al, 2017; Shakoury et al, 2020; Jing & Tang, 2016). This research reports the first discussion of statistical parameters and possible applications related to the surface of kefir biofilms prepared with the extract from Maytenus rigida Mart.…”

Section: Introductionmentioning

confidence: 99%

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Matos

Pinto

Ramos

et al. 2020

Microscopy Res & Technique

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The aim of this study was to report the first discussion of statistical parameters and possible applications related to the surface of kefir biofilms prepared with Maytenus rigida Mart. extract through micromorphology, using atomic force microscopy (AFM). Four different samples were produced. The reference contained demerara sugar with a concentration of 40 g/L and the others had added extract whose concentrations were 0.25, 0.50, and 0.75 g/L, respectively. AFM was used to image the surface in tapping mode, on square areas of 30 μm × 30 μm. Images were studied by the MountainsMap premium commercial software. The main parameter of the surface, roughness, grew with the increase of the extract concentration up to 0.50 g/L. In addition, asymmetry and kurtosis showed that the biofilm with the best peak distribution was the one with 0.25 g/L of plant extract. The other parameters followed the main results for the surface and were observed for the depth and volume parameters. The power spectrum density spectrum confirmed the reliability of the results for the sample with 0.25 g/L. Therefore, the sample with 0.25 g/L of plant extract produced the best balance in relation to the surface properties. These results showed that the biofilm morphology and microtexture were affected by the incorporation of the plant extract and can be useful to define possible applications.

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Section: Introductionmentioning

confidence: 99%

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Matos

Pinto

Ramos

et al. 2020

Microscopy Res & Technique

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“…AFM has been an important tool for analyzing biological surfaces (e.g., Gonçalves et al, 2017; Sobola et al, 2017; Zaneta et al, 2017; Matos et al, 2018; Almeida et al, 2019; Ferraro et al, 2020). The most relevant aspects of topographical features and fractal parameters have been reported using this technique (e.g., Arman et al, 2015; Ţəlu et al, 2015; Jing & Tang, 2016; Ţălu et al, 2016 b , 2018; Ansari et al, 2017; Yadav et al, 2017; Astinchap, 2019; Shakoury et al, 2020). The characterization of plant leaf morphology by AFM has already been reported in the literature (Ramos et al, 2016; Salcedo et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…It is important to note that there are many studies about thin films that have tried to understand 3D complex surface morphology through atomic force microscopy (AFM) measurements (Elenkova et al, 2015;Méndez et al, 2015;Sobola et al, 2017) using stereometric analysis (Ţălu et al, 2015a;Stach et al, 2015Stach et al, , 2017, fractal and multifractal geometry (Arman et al, 2015;Ţălu et al, 2014, 2015b, 2016a, 2019, and power spectral density functions (Arman et al, 2015;Gong et al, 2016). However, articles that use such analyses on other types of surfaces, such as plant leaves, are rare.…”

Section: Introductionmentioning

confidence: 99%

Advanced Microtexture Study of Anacardium occidentale L. Leaf Surface From the Amazon by Fractal Theory

2020

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This work applies stereometric parameters and fractal theory to characterize the structural complexity of the 3D surface roughness of Anacardium occidentale L. leaf using atomic force microscopy (AFM) measurements. Surface roughness was studied by AFM in tapping mode, in air, on square areas of 6,400 and 10,000 μm2. The stereometric analyses using MountainsMap Premium and WSXM software provided detailed information on the 3D surface topography of the samples. These data showed that the morphology of the abaxial and adaxial side of the cashew leaf is different, which was also observed in relation to their microtextures. Fractal analysis showed that the adaxial and abaxial sides have strong microtexture homogeneity, but the adaxial side presented higher surface entropy. These results show that image processing associated with fractal theory can be an indispensable tool for identifying plant species by their leaves because this species has singularities on each side of the leaf.

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“…This phase transition is accelerated by annealing and usually occurs at temperature ranges between 450 C and 700 C. 20 It also depends on the following parameters: initial particle size, initial phase, dopant concentration, reaction atmosphere, and deposition time. [21][22][23] TiO 2−x thin films have been deposited by various techniques such as sol-gel process, 24 chemical vapor deposition, 25 thermal evaporation, 26 ion beam assisted process, 21 pulsed laser deposition, 27 low temperature arc vapor deposition, 28 and physical vapor deposition. [29][30][31][32] However, the direct current (DC) magnetron sputtering method has many advantages such as good control over the composition and structure of the films, extremely high filmsubstrate adhesion, excellent uniformity on large-area substrates, and the ability to coat heat-sensitive substrates.…”

Section: Introductionmentioning

confidence: 99%

“…This phase transition is accelerated by annealing and usually occurs at temperature ranges between 450°C and 700°C 20 . It also depends on the following parameters: initial particle size, initial phase, dopant concentration, reaction atmosphere, and deposition time 21–23 …”

Section: Introductionmentioning

confidence: 99%

Structural properties and surface oxidation states of sputter‐deposited TiO_2−x thin films

Jana¹,

Debnath

Bahadur

et al. 2021

Surface & Interface Analysis

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Titanium dioxide (TiO2−x) films were deposited on silicon (100) substrates from pure titanium (Ti) targets using direct current magnetron sputtering technique. TiO2−x thin films were grown in the thickness range of 515–672 Å with varying sputter powers of 75 and 100 W, at both room temperature (RT) and 200°C substrate temperature (Ts). Structural and compositional characterization of the films, which included surface morphology and study of surface chemical states, was performed. The influences of sputter power and substrate temperature on these parameters were specifically analyzed. Grazing incidence X‐ray diffraction showed that the thin films were amorphous at RT and crystallinity could be achieved only at Ts. The latter showed anatase phase at sputter power of 75 W and transformed into anatase–rutile mixed phase at 100 W. The thickness, roughness, and mass density of the thin films were measured using X‐ray reflectivity. It was observed that for Ts films, the roughness and mass density increased with higher sputter power. Field emission scanning electron microscopy and atomic force microscopy also corroborated this surface roughness result. It was observed from X‐ray photoelectron spectroscopy that the core levels of Ti‐2p3/2 and O‐1s and their corresponding binding energies indicated that only one of the Ti oxidation states, i.e., Ti4+, existed in the films. This work provides insight about the growth of TiO2−x thin films influenced by Ts deposition and different sputter power.

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Fractal and statistical characterization of Ti thin films deposited by RF-magnetron sputtering: The effects of deposition time

Cited by 27 publications

References 24 publications

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Advanced Microtexture Study of Anacardium occidentale L. Leaf Surface From the Amazon by Fractal Theory

Structural properties and surface oxidation states of sputter‐deposited TiO_2−x thin films

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Fractal and statistical characterization of Ti thin films deposited by RF-magnetron sputtering: The effects of deposition time

Cited by 27 publications

References 24 publications

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Stereometric characterization of kefir microbial films associated with Maytenus rigida extract

Advanced Microtexture Study of Anacardium occidentale L. Leaf Surface From the Amazon by Fractal Theory

Structural properties and surface oxidation states of sputter‐deposited TiO2−x thin films

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Structural properties and surface oxidation states of sputter‐deposited TiO_2−x thin films