Fabrication of the durable low refractive index thin film with chitin-nanofiber by LBL method

Tanaka, C.; Shiratori, Seimei

doi:10.1051/matecconf/20130405006

Cited by 6 publications

(5 citation statements)

References 32 publications

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“…To observe the morphology of CHINFs, transmission electron microscope (TEM; CM120, Royal Philips, Amsterdam, Netherlands) was used. The deacetylation ratio of the extracted CHINFs was masured by Fourier-transform infrared spectroscopy (FT-IR; ALPHA-T, Bruker, Billerica, MA, USA), based on the previous study . Ellipsometry (Mary-102, FiveLab Co., Ltd., Saitama, Japan) determined the film thickness and the refractive index.…”

Section: Methodsmentioning

confidence: 99%

“…The deacetylation ratio of the extracted CHINFs was masured by Fourier-transform infrared spectroscopy (FT-IR; ALPHA-T, Bruker, Billerica, MA, USA), based on the previous study. 50 Ellipsometry (Mary-102, FiveLab Co., Ltd., Saitama, Japan) determined the film thickness and the refractive index. Ultraviolet−visible (UV−vis) spectrometry (UVmini-1240, Shimadzu Corporation, Kyoto, Japan) was used for transmittance measurements.…”

Section: ■ Introductionmentioning

confidence: 99%

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Chitin Nanofibers Extracted from Crab Shells in Broadband Visible Antireflection Coatings with Controlling Layer-by-Layer Deposition and the Application for Durable Antifog Surfaces

Manabe¹,

Tanaka²,

Moriyama³

et al. 2016

ACS Appl. Mater. Interfaces

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Reflection from various surfaces of many optical systems, such as photovoltaics and displays, is a critical issue for their performance, and antireflection coatings play a pivotal role in a wide variety of optical technologies, reducing light reflectance loss and hence maximizing light transmission. With the current movement toward optically transparent polymeric media and coatings for antireflection technology, the need for economical and environmentally friendly materials and methods without dependence on shape or size has clearly been apparent. Herein, we demonstrate novel antireflection coatings composed of chitin nanofibers (CHINFs), extracted from crab shell as a biomass material through an aqueous-based layer-by-layer self-assembly process to control the porosity. Increasing the number of air spaces inside the membrane led low refractive index, and precise control of refractive index derived from the stacking of the CHINFs achieved the highest transmittance with investigating the surface structure and the refractive index depending on the solution pH. At a wavelength of 550 nm, the transmittance of the coatings was 96.4%, which was 4.8% higher than that of a glass substrate, and their refractive index was 1.30. Further critical properties of the films were the durability and the antifogging performance derived from the mechanical stability and hydrophilicity of CHINFs, respectively. The present study may contribute to a development of systematically designed nanofibrous films which are suitable for optical applications operating at a broadband visible wavelength with durability and antifog surfaces.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Chitin Nanofibers Extracted from Crab Shells in Broadband Visible Antireflection Coatings with Controlling Layer-by-Layer Deposition and the Application for Durable Antifog Surfaces

Manabe¹,

Tanaka²,

Moriyama³

et al. 2016

ACS Appl. Mater. Interfaces

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“…We believe that LBL film, using CHINF, is a promising candidate material to be used in overcoming the durability problems associated with optical thin films. [92][93][94][95][96]…”

Section: Chitin Nanofiber (Chinf)mentioning

confidence: 99%

Nature‐Inspired Anti‐Reflective Texturization for Solar Energy Applications

Novikova,

Katiyi,

Karabchevsky

2023

Adv Materials Technologies

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Solar energy is a source of renewable energy that is harnessed using a range of technologies. With the development of humanity's interest in solar energy, there is a need to collect and store it. However, the current photovoltaic cells that are used to collect solar energy are far from being optimized, and their further development is in much demand. While there are many factors related to the low efficiency of solar cells, the main challenge is in solving optical losses. In this review, a comprehensive overview of texturization as occurring in nature is provided and recently reported as a technique to increase the transparency of surfaces. The basic concepts and typical patterns are introduced, followed by a discussion of representative works and their uniqueness. Furthermore, insights regarding the future of the emerging domain of nature‐inspired anti‐reflective patterns, with the goal of encouraging researchers to enhance solar cell efficiency and expand the utilization of such patterns for various applications are presented.

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“…Over the years, various techniques have been employed to process thin films, 1,2 including physical deposition techniques and polymer‐based methods. Layer‐by‐Layer (LbL) approach has attracted considerable interest among these techniques, owing to its simplicity, versatility, and capability to achieve precise control at the nanoscale 3–6 . LbL polyelectrolyte multilayers (PEMs) have diverse applications in fields such as separation, 7–9 biotechnology, 10–15 and smart materials 16–22 .…”

Section: Introductionmentioning

confidence: 99%

“…Layer-by-Layer (LbL) approach has attracted considerable interest among these techniques, owing to its simplicity, versatility, and capability to achieve precise control at the nanoscale. [3][4][5][6] LbL polyelectrolyte multilayers (PEMs) have diverse applications in fields such as separation, [7][8][9] biotechnology, [10][11][12][13][14][15] and smart materials. [16][17][18][19][20][21][22] However, the stability and swelling properties of these multilayers can vary depending on the stimuli present.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the salt stability and solvent swelling behavior of PAH‐based polyelectrolyte multilayers by quartz crystal microbalance with dissipation

Konyalı,

Cengiz,

Müftüler

et al. 2023

Polymer Engineering & Sci

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This contribution is aimed to examine the layer stability and solvent swelling behavior of polyelectrolyte multilayers (PEMs) obtained from poly(allylamine hydrochloride) (PAH), poly(styrene sulfonic acid sodium salt) (PSS), and poly(acrylic acid) against different salt solutions using Quartz Crystal Microbalance with Dissipation in terms of the solution concentration, charge type of the top layer, and PEM structure. In general, all multilayers remain stable against MgCl2 and NaCl, phosphate buffer saline, ionic liquid, and solvents, namely methanol and heptane, while 4.5‐bilayered PAH‐PSS film displays partial layer decomposition against 1 M NaOCl. Additionally, it is found that the stability of Layer‐by‐Layer (LbL) films remains unaffected by the surface charge type, although variations in the adsorbed and desorbed amounts, as well as the viscoelastic properties, occur during the salt passage and rinsing steps. Along the salt exposure, changes in dissipation (ΔD) significantly increase because of the fast diffusion of ions through the multilayers but return to their initial value after washing. Especially high and reversible ΔD values of the PEMs against methanol are evaluated as swelling in methanol without chemical disintegration. This behavior can be attractive for solvent‐induced release behavior for the LbL‐assembled films or microcapsules.Highlights Multilayer stability and solvent swelling of PEMs are discussed using QCM‐D. PAH‐PSS films have the highest stability against salt solutions. PAH‐PAA films exhibited significant changes in dissipation values. PEMs did not show multilayer stability against NaOCl solution. (PAH‐PSS)5 film was stable and had swelling/de‐swelling capability against methanol.

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Fabrication of the durable low refractive index thin film with chitin-nanofiber by LBL method

Cited by 6 publications

References 32 publications

Chitin Nanofibers Extracted from Crab Shells in Broadband Visible Antireflection Coatings with Controlling Layer-by-Layer Deposition and the Application for Durable Antifog Surfaces

Chitin Nanofibers Extracted from Crab Shells in Broadband Visible Antireflection Coatings with Controlling Layer-by-Layer Deposition and the Application for Durable Antifog Surfaces

Nature‐Inspired Anti‐Reflective Texturization for Solar Energy Applications

Monitoring the salt stability and solvent swelling behavior of PAH‐based polyelectrolyte multilayers by quartz crystal microbalance with dissipation

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