Photoresponsive Block Copolymer Photonic Gels with Widely Tunable Photosensitivity by Counter‐Ions

Ahn, Youshin; Kim, Eun-Joo; Hyon, Jinho; Kang, Changjoon; Kang, Youngjong

doi:10.1002/adma.201103767

Cited by 21 publications

(22 citation statements)

References 46 publications

(28 reference statements)

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“…(b) Optical responses of the PS‐ b ‐QP2VP photonic gel film (left) depending on UV irradiation dose and multicolor patterns created using a photomask having gradient pattern density to control local crosslink density (right). Reproduced with permission . (c) Schematic of writing and erasing of opal photonic paper by UV induced ring‐opening and temperature induced ring‐closing reaction of RhBMA dye 3 (top) and optical images of a patterned elastomeric opal film after activation of RhBMA‐labeled beads (right) and temperature‐induced reversible erasing (left).…”

Section: Polymer‐based Photonic Structuresmentioning

confidence: 99%

“…The sensitivity of the polymer to UV crosslinking can be retarded by radical‐inhibiting anions with the inhibition power proportional to the size of halogen anions. It is possible to tailor the color of specific areas by ion‐exchange before photomasking and UV exposure leading to a periodic pattern of red, green, and blue regions similar to a color filter for emissive display devices . Jiang et al photopatterned a polymerized opal PhC of PHEMA‐ co ‐PMOEA with PS spheres by swelling with monomer followed by UV exposure and observed color differences between the patterned and unpatterned areas due to differential uptake of solvent vapor …”

Section: Polymer‐based Photonic Structuresmentioning

confidence: 99%

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25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons

et al. 2013

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The engineering of optical and acoustic material functionalities via construction of ordered local and global architectures on various length scales commensurate with and well below the characteristic length scales of photons and phonons in the material is an indispensable and powerful means to develop novel materials. In the current mature status of photonics, polymers hold a pivotal role in various application areas such as light-emission, sensing, energy, and displays, with exclusive advantages despite their relatively low dielectric constants. Moreover, in the nascent field of phononics, polymers are expected to be a superior material platform due to the ability for readily fabricated complex polymer structures possessing a wide range of mechanical behaviors, complete phononic bandgaps, and resonant architectures. In this review, polymer-centric photonic and phononic crystals and metamaterials are highlighted, and basic concepts, fabrication techniques, selected functional polymers, applications, and emerging ideas are introduced.

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Section: Polymer‐based Photonic Structuresmentioning

confidence: 99%

Section: Polymer‐based Photonic Structuresmentioning

confidence: 99%

25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons

et al. 2013

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“…To the best of our knowledge, the demostrated in situ reflectance window is the largest reported for any biological thin film. In addition, we are aware of only limited examples of conformable coatings from soft materials that display dynamic tunability of their reflectance, with only a single example demonstrating in situ dynamic reflectance modulation over a larger portion of the electromagnetic spectrum . Furthermore, the thin film reflectance of our samples extends into the important λ = 700 nm to λ = 1200 nm spectral region, which matches the standard imaging range of infrared visualization equipment .…”

mentioning

confidence: 94%

Reconfigurable Infrared Camouflage Coatings from a Cephalopod Protein

et al. 2013

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In nature, cephalopods employ unique dynamic camouflage mechanisms. Herein, we draw inspiration from self‐assembled structures found in cephalopods to fabricate tunable biomimetic camouflage coatings. The reflectance of these coatings is dynamically modulated between the visible and infrared regions of the electromagnetic spectrum in situ. Our studies represent a crucial step towards reconfigurable and disposable infrared camouflage for stealth applications.

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“…Owing to their photonic bandgaps, they exhibit structural colors (SCs) in the visible wavelength region . PCs have potential applications in low‐power reflective‐mode displays, media boards, and sensors because of their versatile tunability of SCs through the dielectric contrast, dimensions, and shapes of the structural elements. PCs have also been demonstrated as nonvolatile, high‐density information recording media for various emerging smart technologies .…”

Section: Introductionmentioning

confidence: 99%

Nonvolatile, Multicolored Photothermal Writing of Block Copolymer Structural Color

Eoh

Kim

Koo

et al. 2019

Adv Funct Materials

Self Cite

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In spite of efforts to fabricate stimuli-sensitive structural colors (SCs) of self-assembled block copolymer (BCP) photonic crystals (PCs) with potential applications in displays, media boards, and sensors, few studies have demonstrated BCP PCs suitable for high-density nonvolatile information storage. Herein, a simple but robust route for multilevel nonvolatile information recording using a BCP PC is presented. The proposed method is based on the spatially controlled crosslinking of microdomains of a BCP PC induced by photothermal conversion. Photothermal SC writing is accomplished via time-and position-controlled laser exposure on thin poly(styrene-blockquaternized 2-vinyl pyridine) (PS-b-QP2VP) PC films deposited on a layer of poly(3,4-ethylenedioxythiophene) doped with tosylate (PP-PEDOT). Upon near-infrared (NIR) irradiation of this structure, the PP-PEDOT underlayer converts the NIR light into thermal energy in the locally irradiated region, which is subsequently transferred to the BCP top layer consisting of alternating in-plane PS and QP2VP lamellar stacks. The QP2VP layers are vulnerable to thermal crosslinking, giving rise to locally programmable SCs. The degree of crosslinking of the QP2VP domains depends on the laser power and exposure time, which allows for multi-SC recording per spot, leading to a novel multilevel optical recording medium based on BCP PCs.

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Photoresponsive Block Copolymer Photonic Gels with Widely Tunable Photosensitivity by Counter‐Ions

Cited by 21 publications

References 46 publications

25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons

25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons

Reconfigurable Infrared Camouflage Coatings from a Cephalopod Protein

Nonvolatile, Multicolored Photothermal Writing of Block Copolymer Structural Color

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