Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating

Intelligent structural colors have received extensive attention in recent years due to their diverse applications. However, the large-area, uniform, and cost-effective fabrication of ultra-thin structural color films is still challenging. Here, for the first time, we design and employ an ultrasonic...

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Autores principales:	Sijun Li, Donghui Kou, Shufen Zhang, Wei Ma
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	composite structural color films ultrasonic spray-coating large-area hydrophilic property humidity sensitive Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/41edf13410bb44e1bfdfb718a2ea63c5
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id	oai:doaj.org-article:41edf13410bb44e1bfdfb718a2ea63c5
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spelling	oai:doaj.org-article:41edf13410bb44e1bfdfb718a2ea63c52021-11-11T18:46:53ZLarge-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating10.3390/polym132137682073-4360https://doaj.org/article/41edf13410bb44e1bfdfb718a2ea63c52021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3768https://doaj.org/toc/2073-4360Intelligent structural colors have received extensive attention in recent years due to their diverse applications. However, the large-area, uniform, and cost-effective fabrication of ultra-thin structural color films is still challenging. Here, for the first time, we design and employ an ultrasonic spray-coating technique with non-toxic, green nano-silica and polyvinylpyrrolidone as raw materials, to prepare structural color films on silicon wafers. Due to the addition of polyvinylpyrrolidone, the coffee-ring effect during droplet drying is suppressed and uniform composite films are formed. We further perform a detailed study of the influence of various processing parameters including silica/polyvinylpyrrolidone concentration, substrate temperature, nozzle-to-substrate distance, and number of spray-passes on film roughness and thickness. By increasing the number of spray-passes from 10 to 30, the film thickness from 120 to 340 nm is modulated, resulting in different colors, and large-area and uniform colors on commercial round silicon wafers with 15 cm diameter are achieved. The silica/polyvinylpyrrolidone composite films show strong hydrophilicity and are sensitive to humidity changes, leading to quickly tunable and reversible structural colors. Quartz crystal microbalance with dissipation demonstrates water vapor adsorption and condensation on the nanofilm when increasing environmental humidity. Thereby, ultrasonic spray-coating as a novel film fabrication technique provides a feasible scheme for large-area preparation of intelligent structural colors.Sijun LiDonghui KouShufen ZhangWei MaMDPI AGarticlecomposite structural color filmsultrasonic spray-coatinglarge-areahydrophilic propertyhumidity sensitiveOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3768, p 3768 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composite structural color films ultrasonic spray-coating large-area hydrophilic property humidity sensitive Organic chemistry QD241-441
spellingShingle	composite structural color films ultrasonic spray-coating large-area hydrophilic property humidity sensitive Organic chemistry QD241-441 Sijun Li Donghui Kou Shufen Zhang Wei Ma Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
description	Intelligent structural colors have received extensive attention in recent years due to their diverse applications. However, the large-area, uniform, and cost-effective fabrication of ultra-thin structural color films is still challenging. Here, for the first time, we design and employ an ultrasonic spray-coating technique with non-toxic, green nano-silica and polyvinylpyrrolidone as raw materials, to prepare structural color films on silicon wafers. Due to the addition of polyvinylpyrrolidone, the coffee-ring effect during droplet drying is suppressed and uniform composite films are formed. We further perform a detailed study of the influence of various processing parameters including silica/polyvinylpyrrolidone concentration, substrate temperature, nozzle-to-substrate distance, and number of spray-passes on film roughness and thickness. By increasing the number of spray-passes from 10 to 30, the film thickness from 120 to 340 nm is modulated, resulting in different colors, and large-area and uniform colors on commercial round silicon wafers with 15 cm diameter are achieved. The silica/polyvinylpyrrolidone composite films show strong hydrophilicity and are sensitive to humidity changes, leading to quickly tunable and reversible structural colors. Quartz crystal microbalance with dissipation demonstrates water vapor adsorption and condensation on the nanofilm when increasing environmental humidity. Thereby, ultrasonic spray-coating as a novel film fabrication technique provides a feasible scheme for large-area preparation of intelligent structural colors.
format	article
author	Sijun Li Donghui Kou Shufen Zhang Wei Ma
author_facet	Sijun Li Donghui Kou Shufen Zhang Wei Ma
author_sort	Sijun Li
title	Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
title_short	Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
title_full	Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
title_fullStr	Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
title_full_unstemmed	Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating
title_sort	large-area fabrication of structurally colored and humidity sensitive composite nanofilm via ultrasonic spray-coating
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/41edf13410bb44e1bfdfb718a2ea63c5
work_keys_str_mv	AT sijunli largeareafabricationofstructurallycoloredandhumiditysensitivecompositenanofilmviaultrasonicspraycoating AT donghuikou largeareafabricationofstructurallycoloredandhumiditysensitivecompositenanofilmviaultrasonicspraycoating AT shufenzhang largeareafabricationofstructurallycoloredandhumiditysensitivecompositenanofilmviaultrasonicspraycoating AT weima largeareafabricationofstructurallycoloredandhumiditysensitivecompositenanofilmviaultrasonicspraycoating
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Large-Area Fabrication of Structurally Colored and Humidity Sensitive Composite Nanofilm via Ultrasonic Spray-Coating

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