Automated setup for spray assisted layer-by-layer deposition

Mundra, Paul; Otto, Tobias; Gaponik, Nikolai; Eychmüller, Alexander

doi:10.1063/1.4811662

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…This results in a thin nanocomposite coating with good dispersion and intercalation of the nanofiller platelets with a thickness that can reach 100 nm. [ 39 ] Moreover, LbL deposition can be obtained using several techniques such as spin coating, [ 40 ] spraying, [ 41,42 ] and dipping, [ 43,44 ] which is interesting for an easier scaling up, and roll‐to‐roll processes such as blade coating. [ 45 ] Higher concentrations of filler are possible with these deposition techniques.…”

Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Barrier properties

et al. 2021

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Up to half of food spoils or goes to waste; packaging is one element that can extend shelf life and reduce the landfill burden. However, plastic packaging contributes to landfills and microparticles in the environment and, as a consequence, society has mandated industry and academics to identify sustainable materials to replace petroleum derived plastics. Oxygen, water, and CO2 permeability are among the physico‐chemical properties we measure to identify the suitability of new polymer formulations. Other application of gas permeability include petroleum engineering, carbon capture, water purification, and biological systems. Here we concentrate on the basic concepts of gas transport through polymeric film as well as the effect of structural and environmental parameters. We then describe common instrumentation and data they produce with a specific focus on reference standards. To identify the major research areas, we compiled 4271 articles indexed by Web of Science since 2017 with film and polymer as keywords. The VOSViewer software tool classified the 100 most frequent keywords from these articles into six clusters: nanofilteration, thin film composites, and reverse osmosis; nanocomposites, morphology, and polyvinyl alcohol; mechanical, barrier, and physicochemical properties; permeability, membranes, and transport properties; chitosan and antimicrobial and antioxidant properties; and, films, nanoparticles, and drug delivery. Barrier property research will continue to focus on developing biobased polymers and analyzers capable of measuring multiple compounds simultaneously with dozens of samples while minimizing time.

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Section: Applicationsmentioning

confidence: 99%

Experimental methods in chemical engineering: Barrier properties

et al. 2021

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“…LbL coatings have a higher gas barrier than conventional metal or mineral oxide coating techniques, as it enables a high clay loading without aggregation. 13 LbL deposition could be achieved with various processes, such as spin coating, 14 spraying, 15,16 and dipping, 17,18 for which scaling up is still a challenge. Another technique that can be applied to LbL thin filmdeposition is a roll-to-roll process, such as blade coating (DB).…”

Section: Introductionmentioning

confidence: 99%

“…LbL deposition could be achieved with various processes, such as spin coating, spraying, , and dipping, , for which scaling up is still a challenge. Another technique that can be applied to LbL thin filmdeposition is a roll-to-roll process, such as blade coating (DB).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Crosslinking Efficiency in Dip and Roll-Deposited Coatings on Their Oxygen Barrier

et al. 2019

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Coating techniques are key factors in determining coated film properties. In the present study, nanocomposite coatings of poly(vinyl alcohol) and a nanoclay, montmorillonite, were deposited layer-by-layer using roll (doctor blade, DB) and dip coating techniques, in an effort to compare the impact of these techniques on the crosslinking efficiency and oxygen barrier of the coated films. The barrier properties at different relative humidities were tested, and the extent of nanoclay intercalation as well as the films’ morphology was investigated. Barrier was further improved by crosslinking the coating with glyoxal and glutaraldehyde. Both techniques gave similar results but with a higher impact of relative humidity in roll coated films. Better results were achieved by tailoring the composition of those coatings to favor a higher density of hydrogen bonding in the coating.

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Plasmon‐Enhanced Fluorescence of NIR‐Emitting Cd_xHg_1‐xTe Quantum Dots by Ag Nanoprisms

Decker,

Metzkow,

Lesnyak

2024

Part & Part Syst Charact

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Near‐infrared (NIR)‐emitting colloidal semiconductor nanocrystals (NCs) draw a lot of attention due to various fields of their potential application, such as bio‐imaging, photovoltaics, photodetectors, light‐emitting diodes, and optical amplifiers for telecommunication. Since they typically suffer from the partial loss of their fluorescence in a solid state, strategies to increase their quantum yields are of outstanding importance. One of the means to improve it is their coupling with structures exhibiting localized surface plasmon resonance (LSPR). As demonstrated for the visible range of light, plasmon‐exciton interactions can enhance the photoluminescence (PL) of CdSe and CdTe NCs. In this work, the influence of the electromagnetic field of plasmonic silver NCs on the PL of CdxHg1–xTe NCs in the NIR region with a special emphasis on tuning the distance between these particle species is studied. In a series of samples prepared by a layer‐by‐layer deposition through polyelectrolytes, a 1.4‐fold PL enhancement at a distance of 9–11 nm between the two layers is observed, while at any other separation emission quenching is a dominating effect. These findings corroborate well with theoretical predictions of an emission increase at these specific distances and can be applied to other types of plasmonic and emitting materials.

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Automated setup for spray assisted layer-by-layer deposition

Cited by 7 publications

References 21 publications

Experimental methods in chemical engineering: Barrier properties

Experimental methods in chemical engineering: Barrier properties

Comparison of Crosslinking Efficiency in Dip and Roll-Deposited Coatings on Their Oxygen Barrier

Plasmon‐Enhanced Fluorescence of NIR‐Emitting Cd_xHg_1‐xTe Quantum Dots by Ag Nanoprisms

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Automated setup for spray assisted layer-by-layer deposition

Cited by 7 publications

References 21 publications

Experimental methods in chemical engineering: Barrier properties

Experimental methods in chemical engineering: Barrier properties

Comparison of Crosslinking Efficiency in Dip and Roll-Deposited Coatings on Their Oxygen Barrier

Plasmon‐Enhanced Fluorescence of NIR‐Emitting CdxHg1‐xTe Quantum Dots by Ag Nanoprisms

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Product

Resources

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Plasmon‐Enhanced Fluorescence of NIR‐Emitting Cd_xHg_1‐xTe Quantum Dots by Ag Nanoprisms