A Thin-Film Electrochromic Device Based on a Polyoxometalate Cluster

Liu, Shaoqin; Kurth, Dirk G.; Möhwald, Helmuth; Volkmer, Dirk

doi:10.1002/1521-4095(20020205)14:3<225::aid-adma225>3.0.co;2-f

Cited by 253 publications

(158 citation statements)

References 33 publications

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“…The materials used for solid-state voltammetry should contain not only reactive redox species, through which fast reversible electron transfer is possible, but also fairly large amounts of mobile counter cations to keep the electroneutrality. Such materials can have potential application as charge storage in batteries and supercapacitors [3], electrochromic devices [4], corrosion protection [5,6], medicine [7], and fuel cell research [7][8][9][10][11][12][13][14][15]. The important physicochemical parameters, such as porosity, degree and type of solvation, effective diffusion coefficient of charge propagation, concentration of redox species, should be taken into account during evaluation and selection of solid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Adamczyk

Miecznikowski

2013

J Solid State Electrochem

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We demonstrate the electrochemical characteristics of the, poorly described in the literature, mixed-valence proton conducting solid borotungstic acid single crystal, H 5 BW 12 O 40 xH 2 O, in the absence of liquid electrolyte phase. We performed electrochemical measurements in an all-solid cell with a gold fiber ultramicrodisk (diameter 10, 25, and 40 μm) working electrode, a silver semi-reference disk electrode, and a glassy carbon ring counter electrode. Diagnostic experiments at different scan rates aimed at probing the model of mass transport and potential kinetic limitations. Such bulk parameters as the effective diffusion coefficient of charge propagation and the concentration of mixed-valence redox centers were determined by two methods. The first method is based on the analysis of both Cottrellian and steady-state currents (the mixed-regimes method), and the second method provides the true diffusion coefficient (transport coefficient free of the migration influence) for both the substrate and the product of the electrode reaction. Together, these methods constitute a double potential step chronoamperometry experiment. The data obtained with these electrochemical experiments (effective diffusion coefficients, concentration of mixed-valence redox centers, etc.) can support the results obtained with other techniques (XRD, FTIR, and TGA).

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Section: Introductionmentioning

confidence: 99%

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Adamczyk

Miecznikowski

2013

J Solid State Electrochem

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“…Some of the first electrochromic coatings were obtained from poly (diallyldimethylammonium) [125]. As can be seen in figure 25, the oxidized form of Eu-POM is completely transparent in the visible region, whereas the reduced Eu-POM exhibits a broad absorption band at approximately 700 nm.…”

Section: Ultra Thin Filmsmentioning

confidence: 99%

Metallo-supramolecular modules as a paradigm for materials science

Kurth

2008

Science and Technology of Advanced Materials

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Metal ion coordination in discrete or extended metallo-supramolecular assemblies offers ample opportunity to fabricate and study devices and materials that are equally important for fundamental research and new technologies. Metal ions embedded in a specific ligand field offer diverse thermodynamic, kinetic, chemical, physical and structural properties that make these systems promising candidates for active components in functional materials. A key challenge is to improve and develop methodologies for placing these active modules in suitable device architectures, such as thin films or mesophases. This review highlights recent developments in extended, polymeric metallo-supramolecular systems and discrete polyoxometalates with an emphasis on materials science.

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“…Since then, many practical applications of this surface treatment method have been described, such as in electrochromic materials [3][4][5], controlled drug delivery [6,7], composites with barrier properties towards oxygen [8][9][10][11][12], antireflective [13] and waterproof coatings [14][15][16], and antibacterial materials [17][18][19]. In principle, LbL assemblies arise from alternative dipping of substrates in, most often, water-based solutions of polyelectrolytes, which makes this method eco-friendly.…”

Section: Introductionmentioning

confidence: 99%

Studies on the thermal properties and flammability of polyamide 6 nanocomposites surface-modified via layer-by-layer deposition of chitosan and montmorillonite

Majka

Cokot

Pielichowski

2017

J Therm Anal Calorim

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In this work, layer-by-layer assembly technique has been employed to deposit cationic chitosan (CH) and anionic montmorillonite (MMT-Na ? ) polyelectrolyte coatings on polyamide 6 (PA6). Without an additional surface treatment, 5, 10 and 20 bilayers of CH/MMT-Na ? were successfully adsorbed on PA6 matrix as confirmed by XRD, ATR-FTIR and SEM-EDX results. The thermal stability was evaluated using TGA and DSC methods, and it was found that neat PA6 demonstrated better performance (by ca. 5°C) and bilayers caused slightly delayed melting of PA6 crystalline phase. Some interesting results proving imparted flame retardancy by applied assemblies were obtained by vertical (VFT) and horizontal (HFT) flammability tests and microcalorimetric analysis (MCC) methods. It was found that all of the coated PA6 specimens have accomplished V-0 notes in VFT and the intensity of melt dripping reduced. According to MCC results, PA6 covered with 20 bilayers showed the highest reduction-up to 10% relative to reference material-in PHRR.

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A Thin-Film Electrochromic Device Based on a Polyoxometalate Cluster

Cited by 253 publications

References 33 publications

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Metallo-supramolecular modules as a paradigm for materials science

Studies on the thermal properties and flammability of polyamide 6 nanocomposites surface-modified via layer-by-layer deposition of chitosan and montmorillonite

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