AFM and XRD characterization of silver nanoparticles films deposited on the surface of DGEBA epoxy resin by ion sputtering

Andrade, José Elisandro de; Machado, R.; Macêdo, M.A.; Cunha, F.

doi:10.1590/s0104-14282013005000009

Cited by 24 publications

(10 citation statements)

References 22 publications

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“…526 AFM and XRD were jointly used to characterize Ag NP films, where both techniques provided complementary information. 527 In particular, AFM allowed the characterization of the grain size and the nanoparticle coverage of the surface, while XRD identified the preferential growth direction of the particles. Interestingly, at higher NP coverage, AFM showed that the film was made of larger particle grains.…”

Section: Microscopy Techniques For Np Characterizationmentioning

confidence: 99%

Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties

2018

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Nanostructures have attracted huge interest as a rapidly growing class of materials for many applications. Several techniques have been used to characterize the size, crystal structure, elemental composition and a variety of other physical properties of nanoparticles. In several cases, there are physical properties that can be evaluated by more than one technique. Different strengths and limitations of each technique complicate the choice of the most suitable method, while often a combinatorial characterization approach is needed. In addition, given that the significance of nanoparticles in basic research and applications is constantly increasing, it is necessary that researchers from separate fields overcome the challenges in the reproducible and reliable characterization of nanomaterials, after their synthesis and further process (e.g. annealing) stages. The principal objective of this review is to summarize the present knowledge on the use, advances, advantages and weaknesses of a large number of experimental techniques that are available for the characterization of nanoparticles. Different characterization techniques are classified according to the concept/group of the technique used, the information they can provide, or the materials that they are destined for. We describe the main characteristics of the techniques and their operation principles and we give various examples of their use, presenting them in a comparative mode, when possible, in relation to the property studied in each case.

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Section: Microscopy Techniques For Np Characterizationmentioning

confidence: 99%

Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties

2018

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“…9b (curves a and b, respectively). Curve a in this figure shows the regular vibration bands of pure epoxy [44], while that of the CNPs/epoxy composite has one extra permanent band, induced at around 730 cm -1 . This band may be created as a result of bonding between the carbonyl groups which exist in the CNPs (Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 89%

Carbon rich fly ash and their nanostructures

Salah¹,

S²,

H³

et al. 2016

Carbon letters

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Carbon rich fly ash was recently reported to have compositions that are ideal for use as a precursor and catalyst for carbon nanotube growth. This fly ash powder is mostly composed of pure carbon, predominantly present as sp 2 . In this work, the effect of sonication time on the morphology and structural properties of carbon rich fly ash particles is reported. The obtained results show that ultrasound treatment is an effective tool for producing ultrafine particles/fragments with higher porosity, which might be suitable for the adsorption of gasses. Moreover, carbon nanoparticles (CNPs) of this fly ash were produced in parallel using the ball milling technique, and were evaluated as reinforcements for epoxy based composites. These CNPs have almost spherical shapes with particle sizes of around 30 nm. They were found to have strong C=O carbonyl group bonds, which might be generated during the ball milling process. The tensile testing results of a fly ash CNP reinforced epoxy composite showed significant improvements in the mechanical properties, mainly in the stiffness of the polymer. The stiffness value was increased by around 23% of that of neat epoxy. These CNPs with chemically active groups might also be useful for other applications.

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“…Coatings were elaborated by Radiofrequency Magnetron Sputtering, which permits working at low temperature (generally lower than 60 °C). Moreover, the deposits obtained with this technique have a higher density and a better adhesion to the substrate than those elaborated by other methods such as vacuum evaporation [21][22][23] .…”

Section: Introductionmentioning

confidence: 90%

Improved durability of Bisphenol A polycarbonate by bilayer ceramic nano-coatings alumina-zinc oxide

et al. 2020

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Polycarbonate exposed to sunlight yellows, degrades and loses its usable properties. In order to increase its lifetime, it can be coated with nano-ceramic thin layers of ZnO and Al 2 O 3 deposited by sputtering. The role of the ZnO is to absorb the UV photons that can damageable for the polycarbonate. However, one of the limitations in the use of ZnO is the photocatalytic oxidation that could occur at interface ZnO/PC as a consequence of the photocatalytic activity of this oxide. Insertion of Al 2 O 3 between PC and ZnO could be a way to inhibit this interfacial oxidation. The photooxidation of the ceramic/polymer assemblies, in condition of artificial accelerated ageing, was measured by infra-red and UV-vis spectroscopies. The results show that the photocatalytic activity of ZnO occurring in monolayer coated substrates can be significantly reduced by insertion of Al 2 O 3 and that, in addition, Al 2 O 3 decreases the permeability to oxygen of the coating.

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AFM and XRD characterization of silver nanoparticles films deposited on the surface of DGEBA epoxy resin by ion sputtering

Cited by 24 publications

References 22 publications

Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties

Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties

Carbon rich fly ash and their nanostructures

Improved durability of Bisphenol A polycarbonate by bilayer ceramic nano-coatings alumina-zinc oxide

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