Preparation and characterisation of monolayers and Langmuir–Blodgett films of liquid crystal mixed with cubic silsesquioxanes

Dopierała, Katarzyna; Rojewska, Monika; Skrzypiec, Marta; Dutkiewicz, Michał; Maciejewski, Hieronim; Prochaska, Krystyna

doi:10.1080/02678292.2017.1325524

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…Silsesquioxanes (RSiMe 2 O) ∼4 (R′SiMe 2 O) ∼4 Si 8 O 12 have been also used in the preparation and characterization of monolayers and Langmuir–Blodgett films. They were made by mixing of 4′-octyl-4-biphenylcarbonitrile with cubic silsesquioxanes (RSiMe 2 O) ∼4 (R′SiMe 2 O) ∼4 Si 8 O 12 , where R = PEG-OH and R′ = PEG-OMe . The obtained results showed the impact of POSS on liquid-crystal monolayers, which improved their stability and rigidity and decreased the elasticity of the films.…”

Section: Introductionmentioning

confidence: 99%

“…They were made by mixing of 4′-octyl-4-biphenylcarbonitrile with cubic silsesquioxanes (RSiMe 2 O) ∼4 (R′SiMe 2 O) ∼4 Si 8 O 12 , where R = PEG-OH and R′ = PEG-OMe. 9 The obtained results showed the impact of POSS on liquid-crystal monolayers, which improved their stability and rigidity and decreased the elasticity of the films. The multilayer structure of the condensed film and formation of net-like structures in the expanded film successfully transferred onto solid substrates using the Langmuir−Blodgett technique were found.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes

et al. 2019

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In this paper, the effective functionalization of silsesquioxane (HSiMe 2 O) 8 Si 8 O 12 (1) via hydrosilylation of two different functional alkenes is presented. For the first time, such a wide spectrum of statistically bifunctional silsesquioxanes (RSiMe 2 O) ∼4 (R′SiMe 2 O) ∼4 Si 8 O 12 was obtained and characterized. Seventeen new systems with various substituents (Si−H, hydroxyl, ester, epoxy, alkenyl, or alkyl) were prepared by two synthetic approaches. The first method was based on the subsequent hydrosilylation of two alkenes in a one-pot manner, whereas the second one consisted of a twos t e p p r o t o c o l i n w h i c h i n t e r m e d i a t e s ( R S i -Me 2 O) ∼4 (HSiMe 2 O) ∼4 Si 8 O 12 were isolated and then reacted with the second alkene, in the presence of the same or a different catalyst. Resulting systems due to the presence of two various groups attached to the silsesquioxane cage can be considered as potential cores for the synthesis of (hyper)branched molecules or macromolecules.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes

et al. 2019

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“…In situ characterization of the Langmuir film upon the compression process by a wide variety of techniques [263][264][265][266][267][268][269][270] as surface pressure vs. area per molecule and surface potential vs. area per molecule isotherms, Brewster Angle Microscopy (BAM), ellipsometry, X-ray reflectometry, dilational rheology, Infrared reflection spectroscopy or UV-vis reflection spectroscopy, etc. These techniques provide complementary information for the understanding of the intermolecular interactions in the film; A really large number of different anchor groups can be used in the LB methodology in contrast with the SA method since these groups can be not only chemisorbed but also physisorbed onto the electrode.…”

Section: The Langmuir-blodgett Techniquementioning

confidence: 99%

Nanofabrication Techniques in Large-Area Molecular Electronic Devices

2020

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The societal impact of the electronics industry is enormous—not to mention how this industry impinges on the global economy. The foreseen limits of the current technology—technical, economic, and sustainability issues—open the door to the search for successor technologies. In this context, molecular electronics has emerged as a promising candidate that, at least in the short-term, will not likely replace our silicon-based electronics, but improve its performance through a nascent hybrid technology. Such technology will take advantage of both the small dimensions of the molecules and new functionalities resulting from the quantum effects that govern the properties at the molecular scale. An optimization of interface engineering and integration of molecules to form densely integrated individually addressable arrays of molecules are two crucial aspects in the molecular electronics field. These challenges should be met to establish the bridge between organic functional materials and hard electronics required for the incorporation of such hybrid technology in the market. In this review, the most advanced methods for fabricating large-area molecular electronic devices are presented, highlighting their advantages and limitations. Special emphasis is focused on bottom-up methodologies for the fabrication of well-ordered and tightly-packed monolayers onto the bottom electrode, followed by a description of the top-contact deposition methods so far used.

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Exploring Langmuir-Blodgett technique to investigate effect of various subphase conditions on monolayers formed by amphiphilic block co-polymers tetronic 701 and tetronic 90R4

Roy

Naskar²,

Bala

2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Preparation and characterisation of monolayers and Langmuir–Blodgett films of liquid crystal mixed with cubic silsesquioxanes

Cited by 5 publications

References 30 publications

Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes

Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes

Nanofabrication Techniques in Large-Area Molecular Electronic Devices

Exploring Langmuir-Blodgett technique to investigate effect of various subphase conditions on monolayers formed by amphiphilic block co-polymers tetronic 701 and tetronic 90R4

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Preparation and characterisation of monolayers and Langmuir–Blodgett films of liquid crystal mixed with cubic silsesquioxanes

Cited by 5 publications

References 30 publications

Synthesis of Bifunctional Silsesquioxanes (RSiMe2O)∼4(R′SiMe2O)∼4Si8O12 via Hydrosilylation of Alkenes

Synthesis of Bifunctional Silsesquioxanes (RSiMe2O)∼4(R′SiMe2O)∼4Si8O12 via Hydrosilylation of Alkenes

Nanofabrication Techniques in Large-Area Molecular Electronic Devices

Exploring Langmuir-Blodgett technique to investigate effect of various subphase conditions on monolayers formed by amphiphilic block co-polymers tetronic 701 and tetronic 90R4

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Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes

Synthesis of Bifunctional Silsesquioxanes (RSiMe₂O)_∼4(R′SiMe₂O)_∼4Si₈O₁₂ via Hydrosilylation of Alkenes