Crack-free 2D-inverse opal anatase TiO<sub>2</sub> films on rigid and flexible transparent conducting substrates: low temperature large area fabrication and electrochromic properties

Li, Hua; Vienneau, Guillaume; Jones, Martin; Balaji, S.; Robichaud, Jacques; Djaoued, Yahia

doi:10.1039/c4tc01401d

Cited by 34 publications

(28 citation statements)

References 21 publications

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“…IO-PCs structures are usually obtained after undergoing three-step synthesis, namely (1) the self-assembly of monodispersed colloidal particles to form an opal structure, (2) infiltration of the precursor (here titania precursor), and finally (3) the removal of opal, which acts as a sacrificial template for the IO structures. All these steps are critical and need to be carried out by considering the optimum synthesis conditions to prevent defects and cracks, which could affect the final quality of the titania IO-PCs [170][171][172]. Different types of colloidal particles, e.g., silica (SiO 2 ), polystyrene (PS), and polymethyl methacrylate (PMMA) have been used for IO formation.…”

Section: Inverse Opal Photonic Crystals (Io-pcs)mentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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Titania photocatalysts have been intensively examined for both mechanism study and possible commercial applications for more than 30 years. Although various reports have already been published on titania, including comprehensive review papers, the morphology-governed activity, especially for novel nanostructures, has not been reviewed recently. Therefore, this paper presents novel, attractive, and prospective titania photocatalysts, including zero-, one-, two-, and three-dimensional titania structures. The 1D, 2D, and 3D titania structures have been mainly designed for possible applications, e.g., (i) continuous use without the necessity of particulate titania separation, (ii) efficient light harvesting (e.g., inverse opals), (iii) enhanced activity (fast charge carriers' separation, e.g., 1D nanoplates and 2D nanotubes). It should be pointed out that these structures might be also useful for mechanism investigation, e.g., (i) 3D titania aerogels with gold either incorporated inside the 3D network or supported in the porosity, and (ii) titania mesocrystals with gold deposited either on basal or lateral surfaces, for the clarification of plasmonic photocatalysis. Moreover, 0D nanostructures of special composition and morphology, e.g., magnetic(core)-titania(shell), mixed-phase titania (anatase/rutile/brookite), and faceted titania NPs have been presented, due to their exceptional properties, including easy separation in the magnetic field, high activity, and mechanism clarification, respectively. Although anatase has been usually thought as the most active phase of titania, the co-existence of other crystalline phases accelerates the photocatalytic activity significantly, and thus mixed-phase titania (e.g., famous P25) exhibits high photocatalytic activity for both oxidation and reduction reactions. It is believed that this review might be useful for the architecture design of novel nanomaterials for broad and diverse applications, including environmental purification, energy conversion, synthesis and preparation of "intelligent" surfaces with self-cleaning, antifogging, and antiseptic properties.

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Section: Inverse Opal Photonic Crystals (Io-pcs)mentioning

confidence: 99%

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

et al. 2019

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“…Such films are conventionally made by atomic layer deposition (ALD) on transparent substrates, for example, indium tin oxide (ITO)‐coated glass. However, the substrate choice is limited by the high temperatures that are typically required to crystallize the matrix material and remove the templating colloids, preventing the use of inexpensive, lightweight, and flexible substrates . The crystalline character of our NC precursors allows us to avoid the calcination step, instead removing the colloids by dissolution in organic solvent such as toluene.…”

mentioning

confidence: 99%

Nanocrystalline Precursors for the Co‐Assembly of Crack‐Free Metal Oxide Inverse Opals

Phillips

Shirman

et al. 2018

Advanced Materials

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Inorganic microstructured materials are ubiquitous in nature. However, their formation in artificial self-assembly systems is challenging as it involves a complex interplay of competing forces during and after assembly. For example, colloidal assembly requires fine-tuning of factors such as the size and surface charge of the particles and electrolyte strength of the solvent to enable successful self-assembly and minimize crack formation. Co-assembly of templating colloidal particles together with a sol-gel matrix precursor material helps to release stresses that accumulate during drying and solidification, as previously shown for the formation of high-quality inverse opal (IO) films out of amorphous silica. Expanding this methodology to crystalline materials would result in microscale architectures with enhanced photonic, electronic, and catalytic properties. This work describes tailoring the crystallinity of metal oxide precursors that enable the formation of highly ordered, large-area (mm ) crack-free titania, zirconia, and alumina IO films. The same bioinspired approach can be applied to other crystalline materials as well as structures beyond IOs.

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“…Organic electrochromic materials are rarely constructed into PCs for smart windows due to poor structural controllability and chemical stability [92]. Among inorganic electrochromic materials, Ni [93,94], Ir [95] and Co [96] oxides of anode material and W [97][98][99][100][101], V [102] and Ti [103][104][105] oxides of cathode material have been used to construct smart windows based on PCs. WO 3 has been widely used due to its excellent electrochromic performance.…”

Section: Electrochromic Pcsmentioning

confidence: 99%

Review: smart windows based on photonic crystals

Feng

Yang

et al. 2020

J Mater Sci

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Smart windows control indoor solar radiation by regulating the transmittance of light, which is a promising way to reduce building energy consumption. The advent of photonic crystals (PCs) has accelerated the industrialization of smart windows. The combination of static and dynamic regulation can be realized based on the photon control function of photonic band gaps, which is expected to achieve the ideal effect of light transmission and heat control. This paper reviews recent advances of electrochromic and thermochromic smart windows based on PCs. Firstly, theory, materials, performance and development of electrochromic and thermochromic smart windows based on PCs are briefly outlined. Typical structures of electrochromic and thermochromic PCs are introduced in detail, from preparation process, morphology characterization and performance analysis, which provides directions for the future development and construction of smart windows based on PCs. Finally, challenges and opportunities facing next-generation smart windows are summarized.

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Crack-free 2D-inverse opal anatase TiO₂ films on rigid and flexible transparent conducting substrates: low temperature large area fabrication and electrochromic properties

Abstract: A ‘dynamic-hard-template’ strategy is developed for large-area crack-free synthesis of 2D anatase TiO2 inverse opal film on rigid and flexible ITO substrates by using PS templates.

Cited by 34 publications

References 21 publications

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Nanocrystalline Precursors for the Co‐Assembly of Crack‐Free Metal Oxide Inverse Opals

Review: smart windows based on photonic crystals

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Crack-free 2D-inverse opal anatase TiO2 films on rigid and flexible transparent conducting substrates: low temperature large area fabrication and electrochromic properties

Abstract: A ‘dynamic-hard-template’ strategy is developed for large-area crack-free synthesis of 2D anatase TiO2 inverse opal film on rigid and flexible ITO substrates by using PS templates.

Cited by 34 publications

References 21 publications

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Morphology- and Crystalline Composition-Governed Activity of Titania-Based Photocatalysts: Overview and Perspective

Nanocrystalline Precursors for the Co‐Assembly of Crack‐Free Metal Oxide Inverse Opals

Review: smart windows based on photonic crystals

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Crack-free 2D-inverse opal anatase TiO₂ films on rigid and flexible transparent conducting substrates: low temperature large area fabrication and electrochromic properties