Facile synthesis of ultra-smooth and transparent TiO2 thin films with superhydrophilicity

Xiong, Yubao; Lai, Min; Li, Jun; Yong, Haibo; Qian, Hongzhi; Xu, Chaoqi; Zhong, Kun; Xiao, Shaorong

doi:10.1016/j.surfcoat.2015.01.060

Cited by 31 publications

(17 citation statements)

References 33 publications

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“…Therefore, the transmittance is retained . In the past several years, there are many reports on AF films involved TiO 2 , SiO 2 , and TiO 2 /SiO 2 . A lot of synthesis approaches have been developed to fabricate thin‐film coatings possessing AF property.…”

Section: Wettability‐induced Antifogging Theoriesmentioning

confidence: 99%

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

et al. 2018

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Antifogging (AF) structure materials found in nature have great potential for enabling novel and emerging products and technologies to facilitate the daily life of human societies, attracting enormous research interests owing to their potential applications in display devices, traffics, agricultural greenhouse, food packaging, solar products, and other fields. The outstanding performance of biological AF surfaces encourages the rapid development and wide application of new AF materials. In fact, AF properties are inextricably associated with their surface superwettability. Generally, the superwettability of AF materials depends on a combination of their surface geometrical structures and surface chemical compositions. To explore their general design principles, recent progresses in the investigation of bioinspired AF materials are summarized herein. Recent developments of the mechanism, fabrication, and applications of bioinspired AF materials with superwettability are also a focus. This includes information on constructing superwetting AF materials based on designing the topographical structure and regulating the surface chemical composition. Finally, the remaining challenges and promising breakthroughs in this field are also briefly discussed.

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Section: Wettability‐induced Antifogging Theoriesmentioning

confidence: 99%

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

et al. 2018

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“…Fujishima et al [37] reported that the superhydrophilic nature of TiO 2 -coated PET films could be retained for at least 18 days in the dark after UV irradiation. Min Lai et al [38] fabricated ultra-smooth, transparent, and superhydrophilic TiO 2 thin films on glass substrates using sol-gel method and N 2 -assisted dip-coating method. Post-annealing at temperatures above 400 °C in dry air resulted in anatase TiO 2 , and the superhydrophilicity could last for 15 days.…”

Section: Superhydrophilicity Of Tio 2 -Phea/ps Pc Compositesmentioning

confidence: 99%

Photoinduced Superhydrophilic TiO₂–PHEA/PS Photonic Crystal Composites with Vivid Structural Color, Self‐Cleaning Ability, and Robust Structure

Zhang

2021

Adv Materials Inter

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PC structural coloration materials are used in various applications in decoration, [9,10] fabric coloring, [11,12] displays, [13,14] sensors, [15,16] wearable electronic devices, [17,18] information security. [19,20] because of their environmental benignity, high saturation, anti-fading, and reversible tuning. However, in applications, dust or organic matter will adsorb on the surface of the PCs, reducing the brightness and saturation of structural colors. Additional maintenance costs are required to keep the surface clean. In addition, ordered arrays of opal PCs are composed of point contact among microspheres, and the structural stability is poor. [21] PCs arrays are likely to be destroyed while maintaining cleanliness, thus, affecting their useful life. Nature has inspired scientists to design novel materials and functionalities, and many natural creatures have both structural colors and self-cleaning abilities. For example, in addition to the bright structural colors, the wings of Morpho butterflies and the feathers of peacocks are superhydrophobic (WCA > 150°). [22] Thus, the dirt particles are removed by the rolling spherical water droplets, an intrinsic process called selfcleaning. [22] However, the preparation of artificial PC structural color materials with a self-cleaning ability and excellent structural stability is a challenge.The self-cleaning coating can make use of natural environmental conditions, such as sunlight, raindrops, to keep the surface clean. [23] Because of the benefits to the environment and human daily life, including energy and labor-saving, selfcleaning coatings have attracted attention. [24] Self-cleaning coatings are divided into superhydrophobic and superhydrophilic, [25] and they both clean the surface by their behavior toward water. [22] The superhydrophobic coating makes the water droplets slide and roll over the surfaces, thus, carrying the dirt away with them. [23] However, fluorine-containing functional groups need to be introduced to reduce the surface energy of these coatings, which will lead to potential biosafety problems. The superhydrophilic coating uses appropriate metal oxides to make the water droplets spread on the surface (the WCA < 5°), [26] and removes the dirt by the infiltration and flow of water. [24] TiO 2 is used in superhydrophilic coatings because of its photocatalytic activity, nontoxicity, availability, Due to its high refractive index, photocatalytic activity, and photoinduced superhydrophilicity, TiO 2 has advantages in photonic crystals (PCs). However, the composite of TiO 2 and PCs needs to be calcined at high temperatures, and the structural stability of the composites is poor. In this study, photoinduced superhydrophilic TiO 2 -poly(hydroxyethyl acrylate)/ polystyrene (PHEA/PS) PC composites with strong structural colors and self-cleaning are fabricated by coating triethanolamine-modified anatase TiO 2 nanoparticles-hydroxyethyl acrylate on the surface of PS PCs. The ordered arrays can be retained after the superficial layers of PS PCs are filled...

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“…To remedy this situation, a growing number of studies have focused efforts not only in enhancing the anti-fogging performance of TiO2 in the absence of UV light, but also in broadening its photocatalytic response to visible and near-IR regions. Mixing with oxides, such as WO3, ZnO, SiO2, ZnFe2O4, and reduced graphene oxide [73][74][75][76][77][78][79]; doping with metals, such as Cu and Ag [80,81]; incorporating porogens, including PEG and cetyltrimethylammonium bromide (CTAB), coupled with a calcination treatment [82][83][84][85][86]; using "building blocks" with high surface-to-volume ratios (e.g., nanofibers, nanobelts, nanospheres) [87][88][89][90][91][92][93]; or increasing the surface roughness [94][95][96][97][98], have amply demonstrated to be suitable approaches to fabricate dual anti-fogging/self-cleaning TiO2-based films, with no need for UV light to perform.…”

Section: How To Prevent Surfaces From Fogging Up: Anti-fogging Strategies Mechanisms and Materialsmentioning

confidence: 99%

Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends

Durán

Laroche

2019

Advances in Colloid and Interface Science

119

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Glass-and polymer-based materials have become essential in the fabrication of a multitude of elements, including eyeglasses, automobile windshields, bathroom mirrors, greenhouses, and food packages, which unfortunately mist up under typical operating conditions. Far from being an innocuous phenomenon, the formation of minute water drops on the surface is detrimental to their optical properties (e.g., light-transmitting capability) and, in many cases, results in esthetical, hygienic, and safety concerns. In this context, it is therefore not surprising that research in the field of fog-resistant surfaces is gaining in popularity, particularly in recent years, in view of the growing number of studies focusing on this topic. This review addresses the most relevant advances released thus far on anti-fogging surfaces, with a particular focus on coating deposition, surface micro/nanostructuring, and surface functionalization. A brief explanation of how surfaces fog up and the main issues of interest linked to fogging phenomenon, including common problems, anti-fogging strategies, and wetting states are first presented. Anti-fogging mechanisms are then discussed in terms of the morphology of water drops, continuing with a description of the main fabrication techniques toward anti-fogging property. This review concludes with the current and the future perspectives on the utility of anti-fogging surfaces for several applications and some remaining challenges in this field.

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Facile synthesis of ultra-smooth and transparent TiO2 thin films with superhydrophilicity

Cited by 31 publications

References 33 publications

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

Photoinduced Superhydrophilic TiO₂–PHEA/PS Photonic Crystal Composites with Vivid Structural Color, Self‐Cleaning Ability, and Robust Structure

Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends

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Facile synthesis of ultra-smooth and transparent TiO2 thin films with superhydrophilicity

Cited by 31 publications

References 33 publications

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges

Photoinduced Superhydrophilic TiO2–PHEA/PS Photonic Crystal Composites with Vivid Structural Color, Self‐Cleaning Ability, and Robust Structure

Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends

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Photoinduced Superhydrophilic TiO₂–PHEA/PS Photonic Crystal Composites with Vivid Structural Color, Self‐Cleaning Ability, and Robust Structure