Controlled self-assembly of Langmuir-Blodgett colloidal crystal films of monodispersed silica particles on non-planar substrates

Kohoutek, T.; Parchine, Mikhail; Bardosova, Maria; Pemble, Martyn E.

doi:10.1016/j.colsurfa.2020.124625

Cited by 17 publications

(17 citation statements)

References 33 publications

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“…The highest surface coverage is obtained on nylon fiber using vertical deposition (84–97%), with a denser and more homogeneous coating than horizontal deposition (80–96%). This high coverage is achieved without the need for any special pre-treatment, such as the plasma treatment of PMMA optical fibers prior to silica NPs deposition reported by Kohoutek et al [ 25 ]. Moreover, the nylon fiber diameter (126 ± 8.3 µm, Table S1, Supplementary Material ) is significantly smaller than the value reported for those PMMA optical fibers (ca.…”

Section: Resultsmentioning

confidence: 97%

“…In this context, the use of the Langmuir-Blodgett (LB) technique [ 21 , 22 ] for MOF nanoparticle (NP) deposition presents some significant advantages since homogeneous and dense MOF monolayers can be deposited on the surface of different materials without any pre-treatment of the substrate, using only a minimal MOF amount. Previous studies in the literature have dealt with the deposition of colloidal NPs and metallic NPs onto different substrates using the LB technique [ 23 , 24 , 25 ]. Recently, we have shown the fabrication of monolayer films of NPs of MIL-101(Cr) [ 26 , 27 ] and MIL-96(Al) [ 28 , 29 , 30 ], with sizes of ca.…”

Section: Introductionmentioning

confidence: 99%

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Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

et al. 2021

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The Langmuir-Blodgett (LB) method is a well-known deposition technique for the fabrication of ordered monolayer and multilayer thin films of nanomaterials onto different substrates that plays a critical role in the development of functional devices for various applications. This paper describes detailed studies about the best coating configuration for nanoparticles of a porous metal-organic framework (MOF) onto both insulating or conductive threads and nylon fiber. We design and fabricate customized polymethylmethacrylate sheets (PMMA) holders to deposit MOF layers onto the threads or fiber using the LB technique. Two different orientations, namely, horizontal and vertical, are used to deposit MIL-96(Al) monolayer films onto five different types of threads and nylon fiber. These studies show that LB film formation strongly depends on deposition orientation and the type of threads or fiber. Among all the samples tested, cotton thread and nylon fiber with vertical deposition show more homogenous monolayer coverage. In the case of conductive threads, the MOF particles tend to aggregate between the conductive thread’s fibers instead of forming a continuous monolayer coating. Our results show a significant contribution in terms of MOF monolayer deposition onto single fiber and threads that will contribute to the fabrication of single fiber or thread-based devices in the future.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

et al. 2021

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“…92,93 LB has already proved successful with non-planar substrates, which opens up future possibilities for research and commercial applications. 94 Another simple, rapid and inexpensive technique that enables the preparation of large-scale colloidal PC lms is spray-coating. The colloidal suspension is inserted in an air spray gun, and upon air pressure, the suspension is ejected towards the substrate.…”

Section: Fabrication Methods To Mimic Nature's Photonic Crystalsmentioning

confidence: 99%

“… 92,93 LB has already proved successful with non-planar substrates, which opens up future possibilities for research and commercial applications. 94 …”

Section: Fabrication Methods To Mimic Nature's Photonic Crystalsmentioning

confidence: 99%

Photonics in nature and bioinspired designs: sustainable approaches for a colourful world

2020

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“…However, there are a few approaches through which we can increase the physical or chemical properties of an ordered, porous thin film. The first is to fabricate thin crystals onto a curved substrate [ 41 ]. The second is, as mentioned before, to shape the film as a three-dimensional object.…”

Section: Introductionmentioning

confidence: 99%

Shaping in the Third Direction; Synthesis of Patterned Colloidal Crystals by Polyester Fabric-Guided Self-Assembly

et al. 2021

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A polyester fabric with rectangular openings was used as a sacrificial template for the guiding of a sub-micron sphere (polystyrene (PS) and silica) aqueous colloid self-assembly process during evaporation as a patterned colloidal crystal (PCC). This simple process is also a robust one, being less sensitive to external parameters (ambient pressure, temperature, humidity, vibrations). The most interesting feature of the concave-shape-pattern unit cell (350 μm × 400 μm × 3 μm) of this crystal is the presence of triangular prisms at its border, each prism having a one-dimensional sphere array at its top edge. The high-quality ordered single layer found inside of each unit cell presents the super-prism effect and left-handed behavior. Wider yet elongated deposits with ordered walls and disordered top surfaces were formed under the fabric knots. Rectangular patterning was obtained even for 20 μm PS spheres. Polyester fabrics with other opening geometries and sizes (~300–1000 μm) or with higher fiber elasticity also allowed the formation of similar PCCs, some having curved prismatic walls. A higher colloid concentration (10–20%) induces the formation of thicker walls with fiber-negative replica morphology. Additionally, thick-wall PCCs (~100 μm) with semi-cylindrical morphology were obtained using SiO2 sub-microspheres and a wavy fabric. The colloidal pattern was used as a lithographic mask for natural lithography and as a template for the synthesis of triangular-prism-shaped inverted opals.

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Controlled self-assembly of Langmuir-Blodgett colloidal crystal films of monodispersed silica particles on non-planar substrates

Cited by 17 publications

References 33 publications

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

Photonics in nature and bioinspired designs: sustainable approaches for a colourful world

Shaping in the Third Direction; Synthesis of Patterned Colloidal Crystals by Polyester Fabric-Guided Self-Assembly

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