Stereometric analysis of Amazon rainforest Anacardium occidentale L. leaves

Ramos, Glenda Quaresma; Costa, Ítalo Carvalho da; Costa, M.E.H. Maia da; Pinto, Erveton Pinheiro; Matos, Robert Saraiva; Filho, Henrique Duarte da Fonseca

doi:10.1007/s00425-020-03529-5

Cited by 17 publications

(9 citation statements)

References 30 publications

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“…The values of H>0.5, H=0.5 and H<0.5 indicate correlated, uncorrelated, and anti-correlated Brownian surfaces [44], respectively. Therefore, according to these values, those surfaces are strongly correlated and dominated by different but lower spatial frequencies [45]. Although the surfaces of the polymeric films have revealed that both unloaded and loaded NP presented spherical shape and were well dispersed, they have high self-similarity and different dominant spatial frequencies.…”

Section: Essential Oil Compositionmentioning

confidence: 97%

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

et al. 2021

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Increasing interest in nanoparticles of technological application has been improving their fabrication processes. The encapsulation of essential oils as bioactive compounds has proved to be an excellent alternative to the use of less environment friendly compounds. However, the difficulty of identifying their constitution and interaction with carrier agents have aroused scientific interest and a problem to overcome. Bilayer-based nanoparticles were developed using gelatin and poly-ε-caprolactone (PCL) aiming the encapsulation of Piper nigrum essential oil. based on atomic force microscopy images and dynamic light scattering analysis, the size of the unloaded and loaded nanoparticles was found around (194 ± 40) and (296 ± 54) nm, respectively. The spatial patterns revealed that the surface of nanoparticles presented different surface roughness, similar shapes and height distribution asymmetry, lower dominant spatial frequencies, and different spatial complexity. Traditional infrared spectroscopy allowed the identification of the nanoparticle outermost layer formed by the gelatin carrier, but microscopy-based infrared spectroscopy revealed a band at 1742 cm−1 related to the carbonyl stretching mode of PCL, as well as a band at 1557 cm−1 due to the amide II group from gelatin. The combination of microscopy and spectroscopy techniques proved to be an efficient alternative to quickly identify differences in chemical composition by evaluating different functional groups in bilayer PLC/gelatin nanoparticles of technological application.

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Section: Essential Oil Compositionmentioning

confidence: 97%

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

et al. 2021

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“…MountainsMap software provides microtexture renderings of the surface of the images being an important tool for the qualitative observation of the surface of films or other systems [46][47][48][49][50]. Figures 7(a), (c), and (e) brings the microtextures of the membranes referring to the 3d images of figure 5, revealing furrows belonging to each evaluated sample.…”

Section: Microtexture Analysismentioning

confidence: 99%

Investigating surface and wettability properties of Na₂Ti₃O₇/Na₂Ti₆O₁₃/PVA composites

Aguilera Dominguez,

Pereira da Silva,

Ramos

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Ceramics-polymer composites have garnered significant interest in recent years due to their unique combination of properties and potential applications. This study presents an in-depth analysis of the surface and wettability properties of new Na2Ti3O7/Na2Ti6O13/PVA composite, aiming to uncover their unique characteristics. The analysis revealed notable changes in the morphology and 3D spatial patterns of the films upon incorporating heated and unheated Na2Ti3O7/Na2Ti6O13 into the PVA matrix. The PVA film containing heated ceramics displayed hierarchical topographic roughness (3.71±1.13 nm) similar to those of pure PVA films (2.28±0.13 nm), contrasting with the film containing unheated ceramics (12.31±2 nm). The surface texture of all films exhibited comparable isotropies (without significant difference at a p-value=0.05), indicating that their physical properties remained largely unaffected by the heat treatment imposed on the ceramics. The surface microtexture similarity between the PVA film and the one containing heated ceramics can be attributed to their comparable spatial complexity (FD=2.41‒2.44). Contact angle measurements further demonstrated similar surface wettability between pure PVA (54.5±1.4°) and PVA containing heated Na2Ti3O7/Na2Ti6O13 ceramics (58.6±2.6°), which can be attributed to the resemblances in their surface microtextures. These findings highlight the pivotal role of heat treatment in the formation of Na2Ti3O7/Na2Ti6O13/PVA composites with surface and wettability properties akin to those of pure PVA films. This research contributes to the understanding of composite materials and their potential for various applications, including anticorrosive coatings, sensor devices, and surface engineering.

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“…It is, however, worth noting that in biological systems, similar structures are found in native flora, where the fractal concept becomes an essential tool for describing the surface morphology of leaves. [53][54][55][56] Regarding technological applications, a fractal approach has been used to study the optical properties of the anatase phase of TiO 2 thin films, which are expected to be highly suitable for photocatalysis. 57 A fractal (and multifractal) nanoscale 3D spatial analysis has been proposed to differentiate surface patterns on zirconia-based ceramics after laser treatments.…”

Section: Introductionmentioning

confidence: 99%

The fractal geometry of polymeric materials surfaces: surface area and fractal length scales

Roman,

Cesura,

Maryam

et al. 2024

Soft Matter

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Stereometric analysis of Amazon rainforest Anacardium occidentale L. leaves

Cited by 17 publications

References 30 publications

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

Investigating surface and wettability properties of Na₂Ti₃O₇/Na₂Ti₆O₁₃/PVA composites

The fractal geometry of polymeric materials surfaces: surface area and fractal length scales

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Stereometric analysis of Amazon rainforest Anacardium occidentale L. leaves

Cited by 17 publications

References 30 publications

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

Microscopy-based infrared spectroscopy as a tool to evaluate the influence of essential oil on the surface of loaded bilayered-nanoparticles

Investigating surface and wettability properties of Na2Ti3O7/Na2Ti6O13/PVA composites

The fractal geometry of polymeric materials surfaces: surface area and fractal length scales

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Investigating surface and wettability properties of Na₂Ti₃O₇/Na₂Ti₆O₁₃/PVA composites