Laser-Promoted Immobilization of Ag Nanoparticles: Effect of Surface Morphology of Poly(ethylene terephthalate)

Siegel, Jakub; Grossberger, Daniel; Pryjmaková, Jana; Šlouf, Miroslav; Švorčı́k, Václav

doi:10.3390/nano12050792

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…Researchers have achieved new heights in the realm of nanotechnology with the discovery of nano-particles (NP) finer than 100 nm in size [28][29][30]. NP may be used to improve the mechanical characteristics of various materials, such as polymers [31][32][33] and cementitious materials [34][35][36][37], and are also useful in the medical, engineering, and food domains [38][39][40][41]. This prompted researchers to perform more research on the impact of nano-silica (NS) on concrete [42].…”

Section: Introductionmentioning

confidence: 99%

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

et al. 2022

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Several review studies have been performed on nano-silica-modified concrete, but this study adopted a new method based on scientometric analysis for the keywords’ assessment in the current research area. A scientometric analysis can deal with vast bibliometric data using a software tool to evaluate the diverse features of the literature. Typical review studies are limited in their ability to comprehensively and accurately link divergent areas of the literature. Based on the analysis of keywords, this study highlighted and described the most significant segments in the research of nano-silica-modified concrete. The challenges associated with using nano-silica were identified, and future research is directed. Moreover, prediction models were developed using data from the literature for the strength estimation of nano-silica-modified concrete. It was noted that the application of nano-silica in cement-based composites is beneficial when used up to an optimal dosage of 2–3% due to high pozzolanic reactivity and a filler effect, whereas a higher dosage of nano-silica has a detrimental influence due to the increased porosity and microcracking caused by the agglomeration of nano-silica particles. The mechanical strength might enhance by 20–25% when NS is incorporated in the optimal amount. The prediction models developed for predicting the strength of nano-silica-modified concrete exhibited good agreement with experimental data due to lower error values. This type of analysis may be used to estimate the essential properties of a material, therefore saving time and money on experimental tests. It is recommended to investigate cost-effective methods for the dispersion of nano-silica in higher concentrations in cement mixes; further in-depth studies are required to develop more accurate prediction models to predict nano-silica-modified concrete properties.

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Section: Introductionmentioning

confidence: 99%

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

et al. 2022

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“…This type of laser operates at wavelengths close to the LSP resonance maxima of AgNPs [35,36]. Studies [37,38] refer to the fact that spherical AgNPs with a diameter of about 20 nm have LSP resonance maxima around 410 nm. Our study [19] published elsewhere found that during the AgNPs embedding process, the larger particles tend to anchor closer to the polymer surface, while the smaller particles are able to penetrate deeper.…”

Section: Resultsmentioning

confidence: 99%

Decoration of Ultramicrotome-Cut Polymers with Silver Nanoparticles: Effect of Post-Deposition Laser Treatment

et al. 2022

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Today, ultramicrotome cutting is a practical tool, which is frequently applied in the preparation of thin polymeric films. One of the advantages of such a technique is the decrease in surface roughness, which enables an effective recording of further morphological changes of polymeric surfaces during their processing. In view of this, we report on ultramicrotome-cut polymers (PET, PEEK) modified by a KrF excimer laser with simultaneous decoration by AgNPs. The samples were immersed into AgNP colloid, in which they were exposed to polarized laser light. As a result, both polymers changed their surface morphology while simultaneously being decorated with AgNPs. KrF laser irradiation of the samples resulted in the formation of ripple-like structures on the surface of PET and worm-like ones in the case of PEEK. Both polymers were homogeneously covered by AgNPs. The selected area of the samples was then irradiated by a violet semiconductor laser from the confocal laser scanning microscope with direct control of the irradiated area. Various techniques, such as AFM, FEGSEM, and CLSM were used to visualize the irradiated area. After irradiation, the reverse pyramid was formed for both types of polymers. PET samples exhibited thicker transparent reverse pyramids, whereas PEEK samples showed thinner brownish ones. We believe that his technique can be effectively used for direct polymer writing or the preparation of stimuli-responsive nanoporous membranes.

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“…Nanomaterials, together with tools of surface modification, represent promising approaches for ensuring specific chemical and physical properties that can extend the range of applicability of polymer materials. There are a wide variety of surface modification techniques, such as physical and chemical deposition of the thin layer [ 9 , 10 ], ion implantation [ 11 ], Langmuir-Blodgett coating [ 12 ], or plasma [ 13 ] and laser treatment [ 14 , 15 ], which influence surface topography, chemistry, and wettability. Laser treatment is a very effective method to modify the surface of polymers [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Engineered Cu-PEN Composites at the Nanoscale: Preparation and Characterisation

et al. 2022

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As polymeric materials are already used in many industries, the range of their applications is constantly expanding. Therefore, their preparation procedures and the resulting properties require considerable attention. In this work, we designed the surface of polyethylene naphthalate (PEN) introducing copper nanowires. The surface of PEN was transformed into coherent ripple patterns by treatment with a KrF excimer laser. Then, Cu deposition onto nanostructured surfaces by a vacuum evaporation technique was accomplished, giving rise to nanowires. The morphology of the prepared structures was investigated by atomic force microscopy and scanning electron microscopy. Energy dispersive spectroscopy and X-ray photoelectron spectroscopy revealed the distribution of Cu in the nanowires and their gradual oxidation. The optical properties of the Cu nanowires were measured by UV-Vis spectroscopy. The sessile drop method revealed the hydrophobic character of the Cu/PEN surface, which is important for further studies of biological responses. Our study suggests that a combination of laser surface texturing and vacuum evaporation can be an effective and simple method for the preparation of a Cu/polymer nanocomposite with potential exploitation in bioapplications; however, it should be borne in mind that significant post-deposition oxidation of the Cu nanowire occurs, which may open up new strategies for further biological applications.

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Laser-Promoted Immobilization of Ag Nanoparticles: Effect of Surface Morphology of Poly(ethylene terephthalate)

Cited by 5 publications

References 29 publications

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

Nano-Silica-Modified Concrete: A Bibliographic Analysis and Comprehensive Review of Material Properties

Decoration of Ultramicrotome-Cut Polymers with Silver Nanoparticles: Effect of Post-Deposition Laser Treatment

Engineered Cu-PEN Composites at the Nanoscale: Preparation and Characterisation

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