Multifractal characterization of single wall carbon nanotube thin films surface upon exposure to optical parametric oscillator laser irradiation

Ţălu, Ştefan; Marković, Zoran M.; Stach, Sebastian; Marković, Biljana M. Todorović; Ţălu, Mihai

doi:10.1016/j.apsusc.2013.10.114

Cited by 46 publications

(22 citation statements)

References 24 publications

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“…17,18 Our purpose in this work is to synthesis of different thicknesses of Fe on Cu NPs by Direct-current (DC) magnetron sputtering statistical parameters, and to characterize the 3-D surface morphology using AFM and the statistical parameters, in accordance with ISO 25178-2: 2012. 20 …”

Section: Introductionmentioning

confidence: 99%

“…8 On the other hand, in literature, there are different studies about characterization of microroughness parameters of thin films prepared by DC magnetron sputtering. [9][10][11][12] Many theoretical and experimental studies highlighted that the rough surface morphology of thin films can be concisely characterized by fractal 9,13,14 and multifractal [15][16][17][18][19] geometry, which may be directly applied for data obtained from the AFM.…”

Section: Introductionmentioning

confidence: 99%

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Stereometric Parameters of the Cu/Fe NPs Thin Films

et al. 2015

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This paper analyses the three-dimensional (3-D) surface morphology of thin films of Fe on Cu nanoparticles (NPs) synthesized by Direct-Current (DC) magnetron sputtering deposited on glass substrates. Four samples coated with copper and iron and deposited on the glass surface were used as research materials. Thin films were obtained by means of DC reactive magnetron sputtering method. The copper coating of each sample was 55 nm thick. In addition, the second, third and fourth samples had a coating of iron, with a thickness of 40 nm, 55 nm, and 70 nm, respectively.The sample surface images were obtained by using an atomic force microscope operating in a contactless mode.The 3-D of the surface samples was divided into motifs of significant peaks and pits using MountainsMap® Premium software, which uses the watershed segmentation algorithm. In addition, the highest and lowest points of motifs are localized. The parameters relating to all the segmented motifs consistent with ISO 25178-2: 2012 have been generated using the software. They allow for motif analysis, detection of essential characteristics and their characterization in terms of surface dimensions, volume, curvature, shape, structure etc. MountainsMap® Premium software makes it possible to perform 3-D segmentation of sample surface images and identify all sorts of motifs, such as peaks, pits or irregular shapes in correlation with the surface statistical parameters. The analysis of motifs helps to understand their functional role in the test surface, in order to evaluate the relation among the 3-D micro-textured surface.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stereometric Parameters of the Cu/Fe NPs Thin Films

et al. 2015

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“…[1][2][3][4] The three dimensional (3-D) surface morphology plays a major role in nanomechanics, tribology, and thermodynamics of thin films and their interfaces, involved at the nanometer-scale resolution and can yield important insights into the applied mathematics, theoretical methods and numerical tools for multi-scale modelling. [5][6][7][8][9] The sophisticated surface design and engineering of hierarchical hybrid nanostructures lead to many interdisciplinary researches.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Tribological Properties of FeNPs@a-C:H Films by Micromorphology Analysis and Fractal Geometry

Ţălu

Bramowicz

Kulesza

et al. 2015

Ind. Eng. Chem. Res.

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This paper analyses the three-dimensional (3-D) surface texture of amorphous hydrogenated carbon films with sputtered iron nanoparticles (Fe NPs @ a-C: H) deposited by RF-Plasma Enhanced Chemical Vapor Deposition (RF-PECVD) method on the quartz substrates. The prepared Fe NPs @ a-C: H films were used as research materials. The synthesized samples were deposited at four different pressures of 2.5, 3, 3.35 and 3.5 N/m 2 in the acetylene gas atmosphere. The Fe and C content of the thin films was obtained from X-ray photoelectron spectroscopy (XPS). X-ray diffraction profile and electron diffraction pattern indicates that iron nanoparticles with body-centered cubic crystalline structure are formed in these films. Localized Surface Plasmon Resonance (LSPR) peak that is signature of the existence of the Fe core nanoparticles appears in visible spectra of these films. The sample surface images were recorded using an Atomic Force Microscope (AFM) operating in a non-contact mode and analyzed to reveal statistical, fractal and functional surface properties of prepared samples. The analysis of 3-D surface texture is essential for the correct interpretation of surface topographic features as well as its functional role for the test surface. It also helps to understand the relationship between the surface topography and the functional properties.

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“…It indicates how much the fractal surface fills the 3D volume and represents the quantitative measure of 3D microstructure complexity [29,30] . Generally, the fractal dimension D of a surface is a non-integer value within the range 2 ≤ D ≤ 3, where D = 2 (for ideally flat surfaces) and D = 3 (for surfaces with a rough that occupy all available volume) [31][32][33] . An increasing value of D indicates higher level of fractality, a more irregular shape of the surface roughness [19,34] .…”

Section: Introductionmentioning

confidence: 99%