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Dejam L, Sabbaghzadeh J, Ghaderi A, Solaymani S, Matos RS, Țălu Ș, da Fonseca Filho HD, Sari AH, Kiani H, Shayegan AHS, Doudaran MA. Advanced nano-texture, optical bandgap, and Urbach energy analysis of NiO/Si heterojunctions. Sci Rep 2023; 13:6518. [PMID: 37085689 PMCID: PMC10121669 DOI: 10.1038/s41598-023-33713-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 04/18/2023] [Indexed: 04/23/2023] Open
Abstract
Due to the large number of industrial applications of transparent conductive oxides (TCOs), this study focuses on one of the most important metal oxides. The RF-magnetron sputtering method was used to fabricate NiO thin films on both quartz and silicon substrates at room temperature under flow of Argon and Oxygen. The sputtered samples were annealed in N2 atmosphere at 400, 500, and 600 °C for 2 hours. Using the AFM micrographs and WSXM 4.0 software, the basic surface parameters, including root mean square roughness, average roughness, kurtosis, skewness, etc., were computed. Advanced surface parameters were obtained by the Shannon entropy through a developed algorithm, and the power spectral density and fractal succolarity were extracted by related methods. Optical properties were studied using a transmittance spectrum to achieve the optical bandgap, absorption coefficient, Urbach energy, and other optical parameters. Photoluminescence properties also showed interesting results in accordance with optical properties. Finally, electrical characterizations and I-V measurements of the NiO/Si heterojunction device demonstrated that it can be used as a good diode device.
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Affiliation(s)
- Laya Dejam
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
- Physics Department, West Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Jamshid Sabbaghzadeh
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Atefeh Ghaderi
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Shahram Solaymani
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Robert S Matos
- Amazonian Materials Group, Physics Department, Federal University of Amapá-UNIFAP, Macapá, Amapá, Brazil
| | - Ștefan Țălu
- The Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Cluj-Napoca, Cluj County, Romania
| | - Henrique D da Fonseca Filho
- Laboratory of Synthesis of Nanomaterials and Nanoscopy, Physics Department, Federal University of Amazonas-UFAM, Manaus, Amazonas, Brazil
| | - Amir Hossein Sari
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Hanieh Kiani
- Physics Department, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Amir Hossein Salehi Shayegan
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
- Mathematics Department, Faculty of Basic Science, Khatam-Ol-Anbia (PBU) University, Tehran, Iran
| | - Mahdi Astani Doudaran
- Quantum Technologies Research Center (QTRC), Science and Research Branch, Islamic Azad University, Tehran, Iran
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Shakoury R, Matos RS, da Fonseca Filho HD, Rezaee S, Arman A, Boochani A, Jurečka S, Zelati A, Mardani M, Ţălu Ş. Investigation of deposition temperature effect on spatial patterns of MgF 2 thin films. Microsc Res Tech 2023; 86:169-180. [PMID: 36260856 DOI: 10.1002/jemt.24246] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/12/2022] [Accepted: 10/06/2022] [Indexed: 01/20/2023]
Abstract
In this work, the atomic force microscopy (AFM) technique was used to characterize 3D MgF2 thin film surfaces through advanced analysis involving morphological, fractal, multifractal, succolarity, lacunarity and surface entropy (SE) parameters, consistent with ISO 25178-2: 2012. Samples were synthesized by electron beam deposition, grown in three different temperatures. Three different temperatures of 25°C (laboratory temperature), 150 and 300°C were chosen. The temperature of 300°C is usually the highest temperature that can be deposited with the electron beam evaporation coating system. The substrates were made of glass (diameter 16 mm, thickness 3 mm), and the samples were prepared at a pressure of 5 × 10-5 Torr. The statistical results from the AFM images indicate that topographic asperities decrease with increasing deposition temperature, showing a decrease in roughness values. Regardless of the deposition temperature, all surfaces have a self-similar behavior, presenting a very linear PSD distribution, and, according to our results, the sample deposited at 300° had the highest spatial complexity. On the other hand, surface percolation is increasing when temperature increases, indicating that its low roughness and high spatial complexity play an important role on the formation of their most percolating surface microtexture. Our results demonstrate that the lower deposition temperature promoted the formation of less discontinuous height distributions in the MgF2 films.
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Affiliation(s)
- Reza Shakoury
- Department of Physics, Faculty of Science, Imam Khomeini International University, Qazvin, Iran
| | - Robert Saraiva Matos
- Postgraduate Program in Materials Science and Engineering (P2CEM), Federal University of Sergipe, São Cristovão, Sergipe, Brazil
| | - Henrique Duarte da Fonseca Filho
- Laboratory of Nanomaterials Synthesis and Nanoscopy, Department of Physics, Federal University of Amazonas, Manaus, Amazonas, Brazil
| | - Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Ali Arman
- ACECR, Vacuum Technology Research Group, Sharif University Branch, Tehran, Iran
| | - Arash Boochani
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Stanislav Jurečka
- Institute of Aurel Stodola, Faculty of Electrical Engineering, University of Žilina, Liptovský Mikuláš, Slovakia
| | - Amir Zelati
- Department of Basic Sciences, Birjand University of Technology, Birjand, Iran
| | - Mohsen Mardani
- ACECR, Vacuum Technology Research Group, Sharif University Branch, Tehran, Iran
| | - Ştefan Ţălu
- The Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Cluj-Napoca, Romania
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Matos RS, da Costa ÍC, Yasumura HD, de Azevedo SG, Sanches EA, da Fonseca Filho HD. Nanoscale surface dynamics of spatial patterns of polymeric bilayered particles loaded with essential oil. Microsc Res Tech 2022; 85:3633-3641. [PMID: 35916245 DOI: 10.1002/jemt.24216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 07/04/2022] [Accepted: 07/18/2022] [Indexed: 11/10/2022]
Abstract
Gelatin/PCL bilayered particles loaded with Piper nigrum essential oil was synthesized aiming to access their morphological and surface dynamic patterns. Atomic force microscopy (AFM) was applied to investigate the 3D morphology and multifractal aspects of the particles surface. The AFM maps revealed spherical surfaces and well dispersed particles, besides a rougher surface on the loaded system. Minkowski functionals showed that shape of the rough peaks was similar in the unloaded and loaded systems; however, the presence of deep valleys on the loaded particles revealed their rougher pattern. Multifractal analysis revealed that unloaded and loaded particles presented multifractal behavior with different surface dynamics. The loaded surface presented a greater width of the multifractal spectrum and smaller difference of fractal dimensions, confirming their more vertically growing. These results can be useful in the development of novel polymeric-based particles loaded with essential oil. Their unique surface dynamics can provide enhanced physical properties and performance in emerging biotechnological applications.
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Affiliation(s)
- Robert Saraiva Matos
- Departamento de Física, Universidade Federal do Amapá (UNIFAP), Amazonian Materials Group, Macapá, Amapá, Brazil
| | - Ítalo Carvalho da Costa
- Programa de Pós-graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil
| | - Heloisa David Yasumura
- Laboratório de Síntese de Nanomateriais e Nanoscopia (LSNN), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil
| | - Sidney Gomes de Azevedo
- Laboratório de Polímeros Nanoestruturados (NANOPOL - @nanopol_ufam), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil
| | - Edgar Aparecido Sanches
- Laboratório de Polímeros Nanoestruturados (NANOPOL - @nanopol_ufam), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil
| | - Henrique Duarte da Fonseca Filho
- Programa de Pós-graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil.,Laboratório de Síntese de Nanomateriais e Nanoscopia (LSNN), Universidade Federal do Amazonas (UFAM), Manaus, Amazonas, Brazil
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Abstract
The development and efficient production of effective bioplastics is a hot topic, required to face up to the issue of the difficult disposal of plastics derived from oil. Among the different natural sources of bioplastics, starch is one of the most promising. However, for most applications, the proper mastering of the surface properties of bioplastic is necessary. We report about the surface modification of extruded corn starch films by means of cold plasma based on helium (He) and hexamethyldisiloxane (HMDSO). The differently treated surfaces were functionally characterized in wettability and water absorption. The nanoscale morphology was assessed by scanning electron microscopy and atomic force microscopy. The obtained images were analyzed by advanced figures describing both texture and amplitude parameters, including fractal behavior. The combined treatment (He/HMDSO) resulted in more homogeneous films with smaller, better-distributed grains compared to the case wherein He was not used. Despite the different morphologies observed, starch coated by HMDSO alone and by He/HMDSO presented similar hydrophobic character, with contact angles higher than 110°. Plasma treatment with HMDSO and He/HMDSO resulted in a significant reduction of absorbed water content without reduction of water vapor permeability. The nanotexture of the films did not present statistically significant differences, in terms of spatial complexities, dominant spatial frequencies, homogeneous void distribution, and surface percolation.
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Teimouri E, Darabi E, Hantehzadeh M, Khajehnezhad A. The electrophoretic deposition of TiB 2 nanoparticles produced by pulsed laser ablation: Case study on microstructural features and micromorphology properties. Microsc Res Tech 2022; 85:2140-2151. [PMID: 35150034 DOI: 10.1002/jemt.24072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 01/15/2022] [Accepted: 01/23/2022] [Indexed: 11/11/2022]
Abstract
In the last decade, laser Ablation technique (Nd:YAG) has been considered as a perfect method for producing nanostructures with high purity. In the present study, Titanium diboride nanoparticles (TiB2 NPs) have been deposited on Aluminum (Al) and their micromorphology and microstructural properties have been investigated. The synthesis of TiB2 NPs has been carried out by the Laser Ablation technique (Nd:YAG) which has not been reported so far. Moreover, the effects of laser energy on improving the synthesis of TiB2 NPs have been examined. In this regard, five samples of TiB2 NPs were prepared by Laser Ablation method in different values of laser fluency in the range of 0.4-1.2 J/cm2 . The structural properties of prepared nanoparticles were detected by grazing incidence X-ray diffraction, transmission electron microscopy, and energy dispersive X-ray spectroscopy. The morphology of samples was also investigated by field effect scanning electron microscopy. The results demonstrate the formation of spherical nanoparticles in all samples. Based on the results of the GIXRD patterns, pulsed laser energy is an effective parameter for the size of ablated nanoparticles. As can be seen, increasing the energy of laser beam decreases the average size of nanoparticles from 79.41 to 4 nm. As the next step, the as-prepared nanoparticles were deposited on Aluminum substrate with electrophoretic deposition technique at constant applied voltage (30 Volt) and constant deposition time (30 min). The X-ray diffraction pattern of TiB2 NPs deposited onto Al substrate confirmed the formation of the TiB2 thin films on all Al substrates. Also, the roughness and average particle size of deposited films were measured by atomic force microscopy images and MountainsMap® Premium software. Increasing the fluency of laser beam made the surface more irregular and the maximum value of fractal dimension and hence, the most irregular topography has been observed in the sample produced by maximum laser fluency. RESEARCH HIGHLIGHTS: Titanium diboride nanoparticles have been synthesized by the laser ablation technique. The effects of laser energy on improving the synthesis of TiB2 NPs have been investigated. The micromorphology of samples have been investigated by analyzing AFM and SEM images.
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Affiliation(s)
- Elahe Teimouri
- Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Elham Darabi
- Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Ana Khajehnezhad
- Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
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da Fonseca Filho HD, Pires MP, de Souza PL, Matos RS, Prioli R. Investigation of the morphological and fractal behavior at nanoscale of patterning lines by scratching in an atomic force microscope. Microsc Res Tech 2021; 85:1046-1055. [PMID: 34723417 DOI: 10.1002/jemt.23974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 08/05/2021] [Accepted: 10/22/2021] [Indexed: 11/06/2022]
Abstract
In this work, the topographical effect of the scratching trajectory and the feed direction on the formation of lithographed lines on the (001) InP surface was investigated using an atomic force microscope (AFM) tip-based nanomachining approach. Nanoscratching tests were carried out using the sharp face of a diamond AFM tip in contact mode. From the topographic maps obtained by AFM, several morphological and fractal parameters were obtained and analyzed. Surface morphology presented a surface smoothing for surfaces with scratches produced in [011] and [001] directions. The height parameters confirmed this behavior because scratches in [001] direction exhibited lower roughness. Moreover, this scratch direction promoted the height distribution most symmetrical and platykurtic. The other morphological parameters revealed that this direction provided a more irregular surface (smaller Smc and Sxp ), peak distribution, denser and pointed, smaller portion of material in the core, less deep furrows, higher spatial frequency components, and high isotropy. Fractal parameters revealed that FRE90 has the highest spatial complexity, it is dominated by higher spatial frequencies, and has the lowest surface percolation. Furthermore, all samples exhibited high topographic uniformity.
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Affiliation(s)
| | | | - Patrícia Lustoza de Souza
- Laboratório de Semicondutores, Centro de Estudos em Telecomunicações, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robert Saraiva Matos
- Physics Department, Amazonian Materials Group, Laboratory of Materials, Federal University of Amapá-UNIFAP, Macapá, Brazil
| | - Rodrigo Prioli
- Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil
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Solaymani S, Ţălu Ş, Beryani Nezafat N, Dejam L, Shafiekhani A, Ghaderi A, Zelati A. Optical properties and surface dynamics analyses of homojunction and hetrojunction Q/ITO/ZnO/NZO and Q/ITO/ZnO/NiO thin films. RESULTS IN PHYSICS 2021. [DOI: 10.1016/j.rinp.2021.104679] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bakhtiari M, Hantehzadeh M, Darabi E. The effect of applied electric field on the micromorphology of Pt nanoparticles synthesized by laser ablation. Microsc Res Tech 2021; 84:3171-3181. [PMID: 34310803 DOI: 10.1002/jemt.23875] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/28/2021] [Accepted: 07/06/2021] [Indexed: 02/01/2023]
Abstract
In the present study, laser ablation technique (Nd:YAG) has been applied to synthesize platinum nanoparticles (NPs). Also, the effect of applied electric field on the physical, structural, and morphological properties of Pt NPs has been investigated during the nanosecond pulsed laser ablation of platinum. Based on the results extracted from TEM and scanning electron microscopy images, the formation of high percentage of NPs with spherical shape is demonstrated in all samples. The increase of applied electric field creates few rectangular, hexagonal, and rhombic NPs with the average size decreased from 20 to 9 nm. The significant influence of increasing electric field is also observed in UV-vis spectra by appearing the blue shift of the localized surface plasmon resonance peak. The UV-vis spectra also confirm the metallic nature of Pt NPs and the existence of inhomogeneous-sized particles and the coagulation of particle because of the long tail in higher wavelengths. In addition, atomic force microscopy images have been analyzed through MountainsMap Premium program and fractal dimension. As can be seen, increasing the applied electric field make the surface more irregular and the maximum value of Df reveals the most irregular topography for sample with 50 V/cm electric field. Finally, the bending and stretching frequencies of the functional bending groups connected to the NPs surface have been characterized by Fourier transform infrared spectroscopy. Electrical field-assisted laser ablation in liquids method allows a better control of the size, morphology, structure, and chemical composition of nanoparticles.
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Affiliation(s)
- Mohammad Bakhtiari
- Department of Physics, Faculty of Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mohammadreza Hantehzadeh
- Department of Physics, Faculty of Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Elham Darabi
- Department of Physics, Faculty of Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Investigation of Stereometric and Fractal Patterns of Spin-Coated LuMnO3 Thin Films. ADVANCES IN MATERIALS SCIENCE AND ENGINEERING 2021. [DOI: 10.1155/2021/9912247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In this paper, we have performed qualitative and quantitative analysis of LuMnO3 thin films surfaces, deposited by spin coating over Pt(111)/TiO2/SiO2/Si substrates, to evaluate their spatial patterns as a function of the film’s sintering temperature. Atomic force microscopy was employed to obtain topographic maps that were extensively analyzed via image processing techniques and mathematical tools. 3D (three-dimensional) topographical images revealed that films sintered at 650°C and 750°C presented the formation of smoother surfaces, while the film sintered at 850°C displayed a rougher surface with a root mean square roughness of ∼2.5 nm. On the other direction, the height distribution of the surface for all films has similar asymmetries and shape, although the film sintered using the highest temperature showed the lower density of rough peaks and a sharper peak shape. The advanced fractal parameters revealed that the film sintered at 850°C is dominated by low spatial frequencies, showing less spatial complexity, higher microtexture homogeneity, and uniform height distribution. These results suggest that the combination of stereometric and fractal parameters can be especially useful for identification of unique topographic spatial patterns in LuMnO3 thin films, helping in their implementation in technological applications, such as photovoltaic solar cells and information magnetic date storage and spintronic devices.
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Fractal-Stereometric Correlation of Nanoscale Spatial Patterns of GdMnO3 Thin Films Deposited by Spin Coating. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11093886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Multiferroic systems are of great interest for technological applications. To improve the fabrication of thin films, stereometric and fractal analysis of surface morphology have been extensively performed to understand the influence of physical parameters on the quality of spatial patterns. In this work, GaMnO3 was synthesized and thin films were deposited on Pt(111)/TiO2/SiO2/Si substrates using a spin coating apparatus to study the correlation between their stereometric and fractal parameters. All films were studied by X-ray diffraction (XRD), where the structure and microstructure of the film sintered at 850 °C was investigated by Rietveld refinement. Topographic maps of the films were obtained using an atomic force microscope (AFM) in tapping mode. The results show that the film sintered at 850 °C exhibited a clear formation of a GdMnO3 orthorhombic structure with crystallite size of ~14 nm and a microstrain higher than other values reported in the literature. Its surface morphology presented a rougher topography, which was confirmed by the height parameters. Topographic differences due to different asymmetries and shapes of the height distributions between the films were observed. Specific stereometric parameters also showed differences in the morphology and microtexture of the films. Qualitative rendering obtained by commercial image processing software revealed substantial differences between the microtextures of the films. Fractal and advanced fractal parameters showed that the film sintered at 850 °C had greater spatial complexity, which was due to their higher topographic roughness, lower surface percolation and greater topographic uniformity, being dominated by low dominant special frequencies. Our combination of stereometric and fractal measurements can be useful to improve the fabrication process by optimizing spatial patterns as a function of the sintering temperature of the film.
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Rezaee S. The effect of deposition times in DC-magnetron sputtering on micromorphology of TiO 2 thin films. Microsc Res Tech 2021; 84:1475-1483. [PMID: 33491242 DOI: 10.1002/jemt.23703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 11/11/2022]
Abstract
TiO2 thin films have been prepared by DC-magnetron sputtering process with various deposition times (8, 14, 16, and 20 min) and the micromorphology of their surface has been investigated by means of multifractal analysis. As the main purpose of the manuscript, the topography of all samples are examined by atomic force microscopy (AFM) through the Mountains Map® Premium software which characterizes motifs of significant peaks and pits through stereometric data by the watershed segmentation algorithm. In addition, multifractal features of samples provide deeper insight into texture characteristics and used as the supplementary of the results.
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Affiliation(s)
- Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
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Amâncio MA, Pinto EP, Matos RS, Nobre FX, Brito WR, da Fonseca Filho HD. Nanoscale morphology and fractal analysis of TiO
2
coatings on ITO substrate by electrodeposition. J Microsc 2021; 282:162-174. [DOI: 10.1111/jmi.12990] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 11/22/2020] [Accepted: 11/25/2020] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - Robert Saraiva Matos
- Department of Physics Federal University of Amapá Macapá Amapá Brazil
- Department of Materials Science and Engineering Federal University of Sergipe São Cristóvão Sergipe Brazil
| | - Francisco Xavier Nobre
- Department of Chemistry Federal University of Amazonas Manaus Amazonas Brazil
- Instituto Federal de Educação Ciência e Tecnologia do Amazonas Coari Amazonas Brazil
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Matos RS, Pinheiro BS, Souza IS, Paes de Castro RR, Ramos GQ, Pinto EP, Silva RS, da Fonseca Filho HD. 3D micromorphology evaluation of kefir microbial films loaded with extract of Amazon rainforest fruit Cupuaçu. Micron 2020; 142:102996. [PMID: 33360436 DOI: 10.1016/j.micron.2020.102996] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/27/2020] [Accepted: 12/07/2020] [Indexed: 02/07/2023]
Abstract
We performed qualitative and quantitative analysis of surfaces of kefir biofilms loaded with Amazon rainforest fruit extract. Scanning electron microscopy and atomic force microscopy were used to evaluate the micromorphology of the biofilms. The films surface displayed a lower density of microorganisms (∼ 0.061 microorganisms/μm2) for the lowest concentration of fruit extract, however, a greater density (∼0.220 microorganisms/μm2) was observed for the higher concentration. Height stereometric parameters revealed that the biofilms with the highest concentration presented the highest roughness. However, almost all the stereometric parameters related to texture showed no significant difference. Furthermore, the Hurst coefficients of the average power spectrum density were similar for all biofilms. Fractal parameters confirmed that higher concentrations of fruit extract induced a superior topographic irregularity. However, fractal lacunarity does not show any significant difference confirming the similarity of the microtextures. Moreover, fractal succolarity and surface entropy exhibited values that suggested ideal percolation and strong topographic uniformity, respectively, indicating that these films can uniformly adhere to other surfaces. Our results confirm that the stereometric and fractal parameters can be relevant for the surface characterization of microbial films, which can be of great importance to the biomedical field.
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Affiliation(s)
- Robert S Matos
- Federal University of Sergipe-UFS, Postgraduate Program in Materials Science and Engineering, São Cristóvão, Sergipe, Brazil; Federal University of Amapá-UNIFAP, Amazonian Materials Group, Physics Department, Macapá, Amapá, Brazil
| | - Bianca S Pinheiro
- Federal University of Sergipe-UFS, Postgraduate Program in Materials Science and Engineering, São Cristóvão, Sergipe, Brazil
| | - Izabella S Souza
- Federal University of Amapá-UNIFAP, Amazonian Materials Group, Physics Department, Macapá, Amapá, Brazil
| | - Ruy R Paes de Castro
- Federal University of Amazonas-UFAM, Laboratory of Synthesis of Nanomaterials and Nanoscopy, Physics Department, Manaus, Amazonas, Brazil
| | - Glenda Q Ramos
- Postgraduate Program in Tropical Medicine, Fundação de Medicina Tropical, State University of Amazonas, 69040-000, Manaus, AM, Brazil
| | - Erveton P Pinto
- Federal University of Amapá-UNIFAP, Amazonian Materials Group, Physics Department, Macapá, Amapá, Brazil
| | - Romualdo S Silva
- Federal University of Sergipe-UFS, Postgraduate Program in Physics, São Cristóvão, Sergipe, Brazil
| | - Henrique D da Fonseca Filho
- Federal University of Amazonas-UFAM, Laboratory of Synthesis of Nanomaterials and Nanoscopy, Physics Department, Manaus, Amazonas, Brazil.
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Solaymani S, Kulesza S, Nezafat NB, Shafiekhani A, Ţălu Ş, Dalouji V, Rezaee S, Boochani A. Multiscale Surface Microtexture Analysis of CuNPs@a-C:H Thin Films. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shahram Solaymani
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
| | - Slawomir Kulesza
- Faculty of Technical Sciences, Warmia and Mazury University in Olsztyn, Oczapowskiego 11, Olsztyn, 10-719, Poland
| | - Negin Beryani Nezafat
- School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, 1953833511, Iran
| | - Azizollah Shafiekhani
- Department of Physics, Faculty of Physics and Chemistry, Alzahra University, Tehran, 1993891167, Iran
| | - Ştefan Ţălu
- The Directorate of Research, Development and Innovation Management (DMCDI), Technical University of Cluj-Napoca, Constantin Daicoviciu Street, No. 15, Cluj-Napoca, Cluj County 400020, Romania
| | - Vali Dalouji
- Department of Physics, Faculty of Science, Malayer University, Malayer, 6571995863, Iran
| | - Sahar Rezaee
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
| | - Arash Boochani
- Department of Physics, Kermanshah Branch, Islamic Azad University, Kermanshah, 6718997551, Iran
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