Ladder-type silsesquioxane copolymer gate dielectrics for gating solution-processed IGZO field-effect transistors

Kim, Min Je; Heo, Young Min; Cho, Jeong Ho

doi:10.1016/j.orgel.2017.01.009

Cited by 15 publications

(10 citation statements)

References 46 publications

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“…Finally, it has to be pointed out that contact angle measurements confirm that particle-loaded coatings can still be considered smooth, from a wetting perspective, since neither a Wenzel state (i.e., significant increase in contact angle hysteresis) nor a Cassie-Baxter state (i.e., superhydrophobic wetting state) are observed. This result is not unexpected, since silsesquioxane-based polymer nanocomposites display smooth surfaces in general [71,72].…”

Section: Samplementioning

confidence: 58%

SiO2/Ladder-Like Polysilsesquioxanes Nanocomposite Coatings: Playing with the Hybrid Interface for Tuning Thermal Properties and Wettability

et al. 2020

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The present study explores the exploitation of ladder-like polysilsesquioxanes (PSQs) bearing reactive functional groups in conjunction with SiO2 nanoparticles (NPs) to produce UV-curable nanocomposite coatings with increased hydrophobicity and good thermal resistance. In detail, a medium degree regular ladder-like structured poly (methacryloxypropyl) silsesquioxane (LPMASQ) and silica NPs, either naked or functionalized with a methacrylsilane (SiO2@TMMS), were blended and then irradiated in the form of a film. Material characterization evidenced significant modifications of the structural organization of the LPMASQ backbone and, in particular, a rearrangement of the silsesquioxane chains at the interface upon introduction of the functionalized silica NPs. This leads to remarkable thermal resistance and enhanced hydrophobic features in the final nanocomposite. The results suggest that the adopted strategy, in comparison with mostly difficult and expensive surface modification and structuring protocols, may provide tailored functional properties without modifying the surface roughness or the functionalities of silsesquioxanes, but simply tuning their interactions at the hybrid interface with silica fillers.

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Section: Samplementioning

confidence: 58%

SiO2/Ladder-Like Polysilsesquioxanes Nanocomposite Coatings: Playing with the Hybrid Interface for Tuning Thermal Properties and Wettability

et al. 2020

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“…For more extensive investigation of hybrid materials with unexpected properties, the design and synthesis of other topologically structured silsesquioxanes, like ladder-type silsesquioxanes (laddersiloxanes), are strongly required. Laddersiloxanes possessing highly ordered double-chain structures and possibly presenting polymeric forms are of particular interest in several elds such as optics [14,15] or electronics [16,17]. The preparation of tricyclic, pentacyclic [18][19][20][21], heptacyclic [22], and nonacyclic [23] was previously reported and these well-de ned compounds displayed a high thermal stability [24].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Reaction of Divinyl‐substituted Laddersiloxanes

Liu

Endo

Zhang

et al. 2021

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PurposeSilsesquioxanes with well-de ned structures have been of great interest recently because of their superior properties. Among them, laddersiloxanes (ladder-type silsesquioxanes with de ned structure) were less explored because step-by-step synthesis is usually necessary. In order to investigate the properties of laddersiloxane, and apply these compounds to the monomers of high function materials, we prepared laddersiloxanes with reactive vinyl groups. MethodsThe target compounds were obtained in a two-step reaction from commercially available alkoxysilanes, and total yields were good. Three stereoisomers included in the products were fully investigated by spectroscopic methods and structures were determined. ResultsAs an extension of our previous research of constructing new laddersiloxanes, here we will describe the synthesis, characterization, and functionalization of novel divinyl-substituted laddersiloxanes. Further transformation of all products proceeded smoothly, and extended laddersiloxanes were obtained by hydrosilylation. One of the isomers was isolated and the structure was determined unequivocally by X-ray analysis. ConclusionThe laddersiloxanes described here have two reactive vinyl groups at each end of the molecule. Various reactions including hydrosilylation, polymerization, or ole n metathesis are possible, thus these compounds can be potential monomers for highly functionalized materials.

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“…To investigate the thermal properties of the synthesized laddersiloxanes (6)(7)(8)(9)(10)(11)(12)(13)(14), thermogravimetric analysis (TGA) was performed under a nitrogen flow (250 mL min −1 ) at a rate of 10 • C min −1 . Figures 4 and 5 illustrate the TGA results for each laddersiloxane.…”

Section: Thermal Properties Of Laddersiloxanes 6-14mentioning

confidence: 99%

“…Synthesis of 6-8-6 tricyclic laddersiloxane (11) An argon-purged Schlenk flask equipped with a stir bar was charged with 7 (0.028 g, 0.050 mmol), anhydrous toluene (0.30 mL), and dimethylphenylsilane (92 µL, 0.60 mmol). Karstedt's catalyst (2% Pt, commercial bottle, diluted 100 times in anhydrous toluene under argon, 115 µL, 0.1 µmol Pt) was added to the mixture under an argon atmosphere at 25 • C. After the addition, the mixture was heated to 65 • C and stirred at 65 • C for 18 h. After the reaction, the mixture was cooled to room temperature and passed through a silica plug, which was washed with toluene and dichloromethane.…”

Section: Synthetic Procedures Of Compounds 6-15mentioning

confidence: 99%

“…These compounds exhibit unique hybrid properties, blending organic and inorganic characteristics, which make them promising building blocks for developing hybrid materials for various applications [3][4][5][6][7][8][9]. Among these compounds, laddersiloxanes, which are well-defined ladder-type silsesquioxanes, exhibit highly ordered double-chain structures and have the potential to form polymers [10,11]. Additionally, they possess the highest refractive indices among linear siloxanes, cyclic siloxanes, and cage silsesquioxanes [12].…”

Section: Introductionmentioning

confidence: 99%

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New Janus Tricyclic Laddersiloxanes: Synthesis, Characterization, and Reactivity

et al. 2023

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The synthesis of four novel syn-type tricyclic laddersiloxanes bearing eight or six alkenyl groups is presented. These compounds possess reactive alkenyl groups on both the bridged and side silicon atoms, and their structures were determined through characterization using multinuclear 1D and 2D NMR spectroscopy, mass spectrometry, and elemental analysis techniques. To investigate their reactivity, the compounds were subjected to hydrosilylation using two different silanes, and the resulting fully hydrosilylated compounds were thoroughly analyzed. Remarkably, all the synthesized laddersiloxanes displayed high thermal stability, suggesting their potential as promising precursors for the development of new hybrid materials. Additionally, preliminary findings indicate the possibility of exploiting the reactivity difference between the alkenyl groups attached to the D- and T-unit silicon atoms for the synthesis of Janus molecules. These findings highlight the potential of the reported compounds as valuable building blocks in the construction of innovative materials.

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Ladder-type silsesquioxane copolymer gate dielectrics for gating solution-processed IGZO field-effect transistors

Cited by 15 publications

References 46 publications

SiO2/Ladder-Like Polysilsesquioxanes Nanocomposite Coatings: Playing with the Hybrid Interface for Tuning Thermal Properties and Wettability

SiO2/Ladder-Like Polysilsesquioxanes Nanocomposite Coatings: Playing with the Hybrid Interface for Tuning Thermal Properties and Wettability

Synthesis, Characterization, and Reaction of Divinyl‐substituted Laddersiloxanes

New Janus Tricyclic Laddersiloxanes: Synthesis, Characterization, and Reactivity

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