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Electrochromic two-dimensional covalent organic framework with

COF thin films were prepared in a 20 mL glass reaction tube of 12 mm diameter. J. & Baek, J.-B. Two-dimensional covalent organic frameworks for optoelectronics and energy storage. ChemNanoMat

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Bulk COFs and COF nanosheets for electrochemical energy storage

The obtained COF thin films have been shown to form 2D layers oriented preferentially parallel to the substrate surface and vertically aligned via π–π stacking. 120. Within the last few years, research on COF-based electrochemical energy storage has emerged rapidly and become diversified. As a concluding remark, the research directions

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Flexible all-organic nanocomposite films interlayered with in situ

We have presented a facile approach to incorporating COF nanoparticles into composite thin films of the PVTC polymer, resulting in all-organic, self-standing sandwich films

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Covalent organic frameworks based nanomaterials: Design,

The electrochemical study demonstrates that TFP-NDA-COF can provide energy storage up to 379 F g − 1 at 2 mV s − 1 scan rate, 348 F g − 1 at 0.8 A g − 1, and offer

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β-Ketoenamine-Linked Covalent Organic Frameworks Capable of

Two-dimensional covalent organic frameworks (2D COFs) are candidate materials for charge storage devices because of their micro- or mesoporosity, high surface area, and ability to predictably organize redox-active groups. The limited chemical and oxidative stability of established COF linkages, such as boroxines and boronate esters, precludes these

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Metal–organic frameworks and covalent organic frameworks as

Therefore, a huge number of synthetic methods for supported MOF and COF membrane thin films, such as solvothermal synthesis, seed-mediated growth and counterdiffusion, exist.

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Fabrication of ultra-thin 2D covalent organic framework

In this work, the ultra-thin 2D BDT-COF film was manufactured into hole only devices (HODs), in which 10-nm-thick MoO x and 100-nm-thick Au were utilized as top electrodes to measure the hole mobility of the 2D BDT-COF film in a diode configuration (Fig. 10 b). In order to explore the effect of thickness on the charge-carrier mobility, the BDT

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Two-dimensional covalent organic framework films prepared on

Solution-based synthesis of covalent organic frameworks (COFs) often leads to insoluble powders or fragile films on solution surfaces. Here, the authors report large-area two

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A graphene-covalent organic framework hybrid for high

The energy storage density can be further increased by extending the operation window using electrochemically stable ionic liquids as electrolytes. We fabricated thin-film supercapacitors using the optimal rGO/COF-20 hybrid as electrodes and the ionic liquid (EMIMBF 4) as the electrolyte.

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Recent advances in covalent organic polymers‐based thin films

The COF thin film demonstrated excellent optical properties due to its ordered conjugated structure, tunable bandgap, and uniform surface with large transmittance. (Figure 2H). 137 Meanwhile, the crystallinity of COF thin films was verified by XRD and HR-TEM tests (Figure 2I,J). 2.2 The liquid–liquid interfacial method

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Covalent Organic Frameworks as a Platform for Multidimensional

We prepared oriented, 2D COF thin films on single-layer graphene and other substrates and showed that their stacking direction was normal to the substrate using grazing incidence X-ray diffraction. 81 Subsequently, Bein and co-workers showed that similar films can be grown on transparent conducting substrates, such as ITO, and have measured

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Excellent energy storage performance of Mn-doped SrTiO3-BiFeO3 thin

By controlling the annealing temperature of the amorphous-crystalline coexisted films, the effect of crystallinity on the energy storage performance was systematically analyzed, a high discharge energy storage density (65 J/cm 3) with high efficiency (75%) are obtained in the thin film under low annealing temperature 550 °C. The study confirms

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Molecularly engineered three-dimensional covalent organic

Here, we have designed and in-situ synthesized a ultrathin and uniform three-dimensional (3D) COOH-functionalized covalent organic frameworks (COF) film (denoted as 3D-COOH-COF) with high mechanical strength to protect the Zn anodes. This unique and novel 3D-COOH-COF protective layer provides a variety of advantages. First, a thin thickness and

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Oriented thin film formation of 2D COFs. (A) The

We prepared oriented, 2D COF thin films on single-layer graphene and other substrates and showed that their stacking direction was normal to the substrate using grazing incidence X-ray diffraction

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Recent progress in covalent organic framework thin films:

of COF thin films not only supported on substrates but also acted as free-standing nanosheets by both bottom-up and top- mechanical delamination, and chemical exfoliation. In addition, the applications of COF thin films including energy storage,semiconductor devices, membrane-separation, sensors, and drug delivery are summarized. Finally

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Recent progress in covalent organic framework thin films:

In addition, the applications of COF thin films including energy storage, semiconductor devices, membrane-separation, sensors, and drug delivery are summarized. Finally, to accelerate further

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Covalent Organic Frameworks for Capacitive Energy

COF thin films can be used as freestanding electrodes, avoiding polymeric binders, which may block COFs'' pores. However, current COF thin film preparation methods require dedicated controls and are challenging to scale.

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Olefin-Linked Covalent Organic Framework as Flexible Thin-Film

Olefin-Linked Covalent Organic Framework as Flexible Thin-Film Electrode for High-Performance Micro-Supercapacitor of g-C 34 N 6-COF /CNT hybrid thin film activity and novel energy storage

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Advances in COFs for energy storage devices: Harnessing the

Advances in COFs for energy storage devices: Harnessing the potential of covalent organic framework materials. Author links open overlay panel Maryam Chafiq, Abdelkarim Chaouiki, Young Gun Ko. In 2018, researchers achieved a significant milestone by synthesizing COF thin films with controlled crystallinity and orientation [70, 71]. This

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A self-standing three-dimensional covalent organic framework film

a A DPP-3D-COF film on a SiO 2 /Si substrate. The calculated area of the film is 2.5 cm 2.The top left part is not covered by the film resulting in a different color. b Optical image of a film.c

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Innovative COF@MXene composites for high performance energy

3 · Additionally, COF@MXene possesses various elemental affinity sites, efficient ion channels, and the ability to append various functional groups, which endow them with

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Covalent Organic Framework Thin-Film Photodetectors from

The fabricated out-of-plane photodetector device based on the TpEtBr COF thin film exhibits high photocurrent density (2.65 ± 0.24 mA cm –2 at 0.5 V) and hole mobility (8.15 ± 0.64 ×10 –3 cm

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Self-standing and flexible covalent organic framework (COF)

Layer-by-layer growth of the thin COF layer at the confined interface was the main mechanism to form self-standing COF films with good mechanical robustness. Therefore, it is easy to manipulate the COF films with thicknesses ranging from several to hundreds of nanometer by controlling the reaction duration and the monomer concentration.

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Two-dimensional Covalent Organic Framework Thin Films Grown

Notably, the crystallinity of COF films is observed only at longer residence times, suggesting that oligomeric and polymeric species play an important role in forming the 2D COF lattice. This approach, which we demonstrate for four different frameworks, is both a simple and powerful method to control the formation of COF thin films.

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Lewis-Acid-Catalyzed Interfacial Polymerization of Covalent

Here, we report the synthesis of crystalline, free-standing COF films via the interfacial polymerization of polyfunctional amines and aldehydes in an organic solvent layered on an aqueous solution containing a Lewis acid, Sc(OTf) 3.We recently demonstrated that Sc(OTf) 3 is a highly active catalyst for imine-linked COF formation, which provided powder samples with

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Electrochromic two-dimensional covalent organic framework with

EC-COF-1 films were deposited on transparent conducting indium tin oxide (ITO) electrodes by direct liquid/solid interface solvothermal method at 120 °C. ITO electrodes were

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Solvatochromic covalent organic frameworks

Employing the COF thin film as a vapour-sensitive light H. C. D. & Dichtel, W. R. β‑Ketoenamine-linked covalent organic frameworks capable of pseudocapacitive energy storage. J. Am. Chem.

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Covalent Organic Frameworks for Capacitive Energy Storage:

The energy storage mechanism of the above COF-based EDLC supercapacitors is based on electrolyte ions'' physical absorption and desorption on COF surfaces. Their specific capacitance is not high. COF thin films can be used as freestanding electrodes, avoiding polymeric binders, which may block COFs'' pores. However, current COF thin film

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Covalent Organic Framework Thin-Film Photodetectors from

The synthesis of homogeneous covalent organic framework (COF) thin films on a desired substrate with decent crystallinity, porosity, and uniform thickness has great potential for optoelectronic applications. We have used a solution-processable sphere transmutation process to synthesize 300 ± 20 nm uniform COF thin films on a 2 × 2 cm2 TiO2-coated fluorine-doped

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Polyphosphonate covalent organic frameworks

We are currently exploring the full potential of polyphosphonate-COFs, determining their long-term stability in different media, COF thin films, and using longer tethered arylphosphonic acids to

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Covalent organic frameworks: From materials design to

Covalent organic frameworks (COFs), with large surface area, tunable porosity, and lightweight, have gained increasing attention in the electrochemical energy storage realms. In recent years,

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Journal of Energy Storage

Pore Size and Surface Area: The energy density of a COF-based energy storage system is influenced by its specific surface area and pore size. COFs can be designed with tailored pore sizes, which impacts the amount of charge that can be stored. Growing thin films of orientated COFs on the electrodes has the potential to improve the device''s

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About Cof thin film energy storage

About Cof thin film energy storage

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