Structural Colors Based on Amorphous Arrays Comprised Solely of Silica Particles

Choi, Dae-San; Choi, Jong‐Min; Lee, Chang-Yull

doi:10.3390/app10010420

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…In addition, Figure 1 illustrates the silica nano particle manufacturing using the Stöber method [41]. To hydrolyze DI water and ethanol, stirring was performed at 65 • C and 540 rpm on a heating plate [23,24]. TEOS was added to the DI water and ethanol aqueous solution, followed by stirring at 65 • C and 540 rpm for 10 min.…”

Section: Silica Nanoparticlesmentioning

confidence: 99%

“…The separated silica particles were dried in a convection oven at 50 • C for 6 h to obtain the spherical silica nanoparticle powder. heating plate [23,24]. TEOS was added to the DI water and ethanol aqueous soluti lowed by stirring at 65 °C and 540 rpm for 10 min.…”

Section: Silica Nanoparticlesmentioning

confidence: 99%

“…heating plate [23,24]. TEOS was added to the DI water and ethanol aqueous solution, followed by stirring at 65 °C and 540 rpm for 10 min.…”

Section: Ehd Inkjet Printing On the Pi Filmmentioning

confidence: 99%

“…In the case of dip coating, because nanostructures are formed using attraction and repulsion between molecules, it is simple and has a low initial cost. However, complex structures are challenging to fabricate; only simple nanostructures can be fabricated [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Flexible Structural Color Films Based on Electro-Hydrodynamic Inkjet Printing

2021

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Structural coloration based on nanostructures is one of the alternatives that can prevent environmental pollution compared to the use of chemically synthesized materials. This technique has attracted considerable attention for various applications, including displays and sensors. In this study, a photonic crystal structure based on spherical silica was formed to provide structural color using an electro-hydrodynamic (EHD) equipment, a printed electronic system attracting considerable interest. The EHD inkjet printing equipment could print micro- and nanostructures using the voltage applied between the nozzle and substrate. Silica-based ink samples were prepared for use in the EHD equipment. Appropriate printing parameters for the EHD inkjet printing were set using the prepared sample. Spherical silica was printed on a polyimide (PI) film layer. The spherical silica nanoparticles discharged during the EHD inkjet printing were not deformed by the EHD process. A photonic crystal structure was formed on a polydimethylsiloxane (PDMS) layer by EHD printing by covering the PDMS layer on the PI film. The spherical-silica-based photonic crystal structure formed on the PDMS layer with elasticity and flexibility exhibited a color change with bending loads.

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Section: Silica Nanoparticlesmentioning

confidence: 99%

Section: Silica Nanoparticlesmentioning

confidence: 99%

“…heating plate [23,24]. TEOS was added to the DI water and ethanol aqueous solution, followed by stirring at 65 °C and 540 rpm for 10 min.…”

Section: Ehd Inkjet Printing On the Pi Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexible Structural Color Films Based on Electro-Hydrodynamic Inkjet Printing

2021

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“…Therefore, its utilization contributes to the building of a sustainable society . Various methods to form structural colors have been developed. − However, it is generally difficult and tedious to control the kinds of colors formed by the structural color. , The method to form structural color by the formation of an amorphous colloidal structure using nanoparticles has been frequently studied. − For these methods, the particle size must be changed in order to change the structural color.…”

Section: Introductionmentioning

confidence: 99%

“Plasma-Structural Coloring” of Penciling on a Paper

Moriwaki

Kamine

2023

ACS Appl. Mater. Interfaces

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The penciling part on a paper is colored by the formation of structural color, and the coloring of a paper without ink has been achieved. In a previous study, our group reported that structural color is formed by plasma irradiation (40–120 s) of the surface of a pencil lead or paper painted with a pencil. The formation of structural color due to the thin-layer interference of components of the pencil lead was observed. The clay exposed by removal of the surface graphite through plasma etching plays the role of a “thin layer”. The pencil lead can be colored blue, red, and green by the method. In the case of the paper painted with a pencil (6B), the paper turned blue but could not form the other colors by the method. The reason is that the graphite layer on the paper is not thick enough to form thin-layer interference to show colors other than blue. We now present the method that forms structural colors by plasma irradiation of the paper painted by a graphite-rich pencil lead (9B and 12B). The formation of various structural colors, such as blue, yellow, red-purple, and green, on the paper was achieved. The colored site can be effaced by an eraser. This method is a novel coloring method without using colored inks. This environmentallly friendly coloring method can be applied to various activities, such as studies and art, and can contribute to the achievement of a sustainable society.

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Supraparticles for Sustainability

Wintzheimer

Reichstein

Groppe

et al. 2021

Adv Funct Materials

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The indispensable transformation to a (more) sustainable human society on this planet heavily relies on innovative technologies and advanced materials. The merits of nanoparticles (NPs) in this context are demonstrated widely during the last decades. Yet, it is believed that the impact of particle‐based nanomaterials to sustainability can be even further enhanced: taking NPs as building blocks enables the creation of more complex entities, so‐called supraparticles (SPs). Due to their evolving phenomena coupling, emergence, and colocalization, SPs enable completely new material functionalities. These new functionalities in SPs can be utilized to render six fields, essential to human life as it is conceived, more sustainable. These fields, selected based on an entropy‐rate‐related definition of sustainability, are as follows: 1) purification technologies and 2) agricultural delivery systems secure humans “fundamental needs.” 3) Energy storage and conversion, as well as 4) catalysis enable the “basic comfort.” 5) Extending materials lifetime and 6) bringing materials back in use ensure sustaining “modern life comfort.” In this review article, a perspective is provided on why and how the properties of SPs, and not simply properties of individual NPs or conventional bulk materials, may grant attractive alternative pathways in these fields.

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Structural Colors Based on Amorphous Arrays Comprised Solely of Silica Particles

Cited by 7 publications

References 21 publications

Flexible Structural Color Films Based on Electro-Hydrodynamic Inkjet Printing

Flexible Structural Color Films Based on Electro-Hydrodynamic Inkjet Printing

“Plasma-Structural Coloring” of Penciling on a Paper

Supraparticles for Sustainability

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