Linear thermosensitivity of gel-immobilized tunable colloidal photonic crystals

Sugiyama, Hitomi; Sawada, Tsutomu; Yano, Hiroki; Kanai, Toshimitsu

doi:10.1039/c3tc30736k

Cited by 33 publications

(22 citation statements)

References 24 publications

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“…The structural color materials applied in sensors have been developed over the recent decades because of their facile fabrication and largely modied surface. These structural color sensors were usually constructed by responsive materials and could be tuned by corresponding stimuli, such as temperature, [122][123][124] humidity, [125][126][127] pH, [128][129][130] ions, [131][132][133] and molecules. 134,135 Inspired by Tmesisternus isabellae, Gu et al 136 assembled mesoporous SiO 2 nanoparticles (MSNs) as assembled colloidal particles.…”

Section: Structural Color Sensorsmentioning

confidence: 99%

Self-assembled colloidal arrays for structural color

et al. 2019

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Structural color materials that are colloidally assembled as inspired by nature are attracting increased interest in a wide range of research fields. The assembly of colloidal particles provides a facile and costeffective strategy for fabricating three-dimensional structural color materials. In this review, the generation mechanisms of structural colors from colloidally assembled photonic crystalline structures (PCSs) and photonic amorphous structures (PASs) are first presented, followed by the state-of-the-art and detailed technologies for their fabrication. The variable optical properties of PASs and PCSs are then discussed, focusing on their spatial long-and short-order structures and surface topography, followed by a detailed description of the modulation of structural color by refractive index and lattice distance.Finally, the current applications of structural color materials colloidally assembled in various fields including biomaterials, microfluidic chips, sensors, displays, and anticounterfeiting are reviewed, together with future applications and tasks to be accomplished.

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Section: Structural Color Sensorsmentioning

confidence: 99%

Self-assembled colloidal arrays for structural color

et al. 2019

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“…In the resulting colloidal crystal, the effect of sedimentation time and temperature, solvent quality, and crosslinking degree on the reflected structural color has been investigated . A non‐thermosensitive comonomer together with N ‐isopropylacrylamide (NIPAM) has been used to change the volume transition temperature, and silica photonic crystals have been embedded into it to make a thermosensitive photonic gel . Taking the idea of immobilizing nanocrystals in a PNIPAM hydrogel matrix, microfluidic hydrogel balls containing PS colloidal crystals have been prepared, which beautifully display a thermoresponsive color change due to altering the colloidal crystals spacing …”

Section: Artificial Materialsmentioning

confidence: 99%

Bioinspired Stimuli‐Responsive Color‐Changing Systems

2018

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Stimuli-responsive colors are a unique characteristic of certain animals, evolved as either a method to hide from enemies and prey or to communicate their presence to rivals or mates. From a material science perspective, the solutions developed by Mother Nature to achieve these effects are a source of inspiration to scientists for decades. Here, an updated overview of the literature on bioinspired stimuli-responsive color-changing systems is provided. Starting from natural systems, which are the source of inspiration, a classification of the different solutions proposed is given, based on the stimuli used to trigger the color-changing effect.

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“…For example, poly(N-isopropylacrylamide) (PNIPAM) gel is one of the most important smart hydrogels that responds to the change in temperature close to human body. 28,29 When heated over 32 °C, the hydrophilic PNIPAM becomes hydrophobic, leading to shrinkage and release of its liquid contents. These properties are expected to be used as actuators for biological applications and controlled drug delivery.…”

Section: 8mentioning

confidence: 99%