Sol–gel engineering to tune structural colours

Faustini, Marco

doi:10.1007/s10971-020-05319-7

Cited by 4 publications

(5 citation statements)

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“…It can control the texture and surface properties of the material by changing the pH value, temperature, and reaction time [ 20 ]. It has unique advantages in the composition and structure control of inorganic materials and hybrid materials [ 21 , 22 ], is the simplest, has a low cost, and is suitable for laboratory research [ 23 ]. The sol–gel method uses alcohol or water as the medium to prepare the final product through hydrolysis, polycondensation, aging, drying, and thermal decomposition [ 20 , 24 ] ( Figure 2 A).…”

Section: Tio 2 and Its Composites Materialsmentioning

confidence: 99%

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Shang

Song

2022

Materials

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Traditional antimicrobial methods, such as antibiotics and disinfectants, may cause adverse effects, such as bacterial resistance and allergic reactions. Photocatalysts based on titanium dioxide (TiO2) have shown great potential in the field of antimicrobials because of their high efficiency, lack of pollution, and lack of side effects. This paper focuses on the antimicrobial activity of TiO2 under different light sources. To improve the photocatalytic efficiency of TiO2, we can reduce electron-hole recombination and extend the photocatalytic activity to the visible light region by doping with different ions or compounds and compounding with polymers. We can also improve the surface properties of materials, increase the contact area with microorganisms, and further enhance the resistance to microorganisms. In addition, we also reviewed their main synthesis methods, related mechanisms, and main application fields to provide new ideas for the enhancement of photocatalytic microorganism performance and application popularization in the future.

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Section: Tio 2 and Its Composites Materialsmentioning

confidence: 99%

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Shang

Song

2022

Materials

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“…Pigments are fabricated by a templated sol–gel route using the spray-drying process followed by thermal annealing. The sol–gel synthesis enables precise control on both chemistry and structuration, , and it has been previously applied to the synthesis of VO 2 thin films with switching IR optical properties ,− as well as porous materials . Despite these examples, it is well known that synthetizing and shaping stable VO 2 -based materials in a reliable way and at large scale (gram-scale) represents a longstanding challenge in the domain .…”

Section: Introductionmentioning

confidence: 99%

Self-Regulating VO₂ Photonic Pigments

et al. 2023

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Nanostructured photonic pigments exhibiting structural colors hold promises to replace conventional pigments for several applications. One emerging challenge in the field consists in integrating additional functionalities to the pigments beyond colors. For instance, integrating phase changing materials, such as VO2, would enable the emergence of a new generation of photonic pigments that regulate autonomously the flow of light in the infrared range while conserving their color in the visible range. Yet, developing those self-regulating pigments requires designing VO2 periodic nanostructures and developing a robust and scalable fabrication approach based on low-cost chemical methods. It is well known that synthetizing and shaping vanadium-based compounds in a reliable way represents a longstanding challenge in the domain. Herein, we demonstrate the fabrication of self-regulating photonic pigments made of VO2 micrometric spheres with inverse opal architectures. We developed a chemical route based on the sol–gel process and colloidal self-assembly coupled with high-throughput spray-drying. Importantly, the key to achieve a robust synthetic approach relies on the controlled pseudomorphic transformation between V2O3 and VO2 during thermal annealing. A set of in situ and ex situ microscopy and spectroscopy techniques were used to characterize the VO2 pigment behavior during phase transition in the visible and infrared range, revealing that these pigments modulate IR radiation while maintaining their structural color in the visible region. We demonstrate that these pigments can be easily integrated into paints and coating or embedded into elastomeric objects, opening interesting perspectives for applications in textile or architecture.

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“…In the last decades, tremendous efforts have been made towards the development of synthetic strategies for hybrid organic–inorganic (nano)materials, on the one hand [ 1 , 2 , 3 ], and for anisotropic particles with well-controlled size, shape and composition, on the other hand [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Most of the latter has been aimed at producing building blocks for the bottom-up construction of novel functional materials and devices with more complex and predictable architectures, which could have applications in photonics [ 12 ] and optics [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Templated Synthesis and Assembly of Two-, Three- and Six-Patch Silica Nanoparticles with a Controlled Patch-to-Particle Size Ratio

et al. 2021

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We report a fabrication route of silica nanoparticles with two, three or six patches with an easily tunable patch-to-particle size ratio. The synthetic pathway includes two main stages: the synthesis of silica/polystyrene multipod-like templates and the selective growth of their silica core through an iterative approach. Electron microscopy of the dimpled nanoparticles obtained after dissolution of the polystyrene nodules of the multipod-like nanoparticles provides evidence of the conformational growth of the silica core. Thanks to the presence of some polymer chains, which remained grafted at the bottom of the dimples after the dissolution of the PS nodules, the solvent-induced assembly of the patchy nanoparticles is performed. Chains, hexagonal suprastructures and cubic lattices are obtained from the assembly of two-, three- and six-patch silica nanoparticles, respectively. Our study can guide future work in both patchy nanoparticle synthesis and self-assembly. It also opens new routes towards the fabrication of specific classes of one-, two- and three-dimensional colloidal lattices, including complex tilings.

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Sol–gel engineering to tune structural colours

Cited by 4 publications

References 78 publications

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Self-Regulating VO₂ Photonic Pigments

Templated Synthesis and Assembly of Two-, Three- and Six-Patch Silica Nanoparticles with a Controlled Patch-to-Particle Size Ratio

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Sol–gel engineering to tune structural colours

Cited by 4 publications

References 78 publications

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO2: A Review

Self-Regulating VO2 Photonic Pigments

Templated Synthesis and Assembly of Two-, Three- and Six-Patch Silica Nanoparticles with a Controlled Patch-to-Particle Size Ratio

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Product

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Self-Regulating VO₂ Photonic Pigments