Thermo‐Adaptive Block Copolymer Structural Color Electronics

Park, Taehyun; Eoh, Hongkyu; Jung, Youngdoo; Lee, Geon Woo; Lee, Chang Eun; Lee, Junseok; Kim, Kwang Bum; Ryu, Du Yeol; Yu, Seunggun; Park, Cheolmin

doi:10.1002/adfm.202008548

Cited by 43 publications

(37 citation statements)

References 41 publications

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“…Yu et al constructed a thermoadaptive structural colored system as flexible patches for thermo-sensing scenarios. [114] A poly(N-isopropylacrylamide) (PNIPAM) and Li-TFSI blend solution was spun-coated onto a PS-b-QP2VP photonic film. The QP2VP domain was partially swollen with water and Li-TFSI, endowing the photonic device with a thermochromic optical response.…”

Section: Linear Block Copolymersmentioning

confidence: 99%

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Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

Wang

Chan

Zhao

et al. 2021

Advanced Optical Materials

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history and recent progress of 1D photonic films, also commonly referred to as photonic multilayer structures. In the third section, recent advances in exploiting confined self-assembly of block copolymers to produce photonic pigments are introduced and the diversity of structures that can be achieved with this method explored, ranging from concentric lamellae to porous particles with correlated disorder. Finally, we conclude by highlighting promising directions for future investigation.

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Section: Linear Block Copolymersmentioning

confidence: 99%

mentioning

confidence: 99%

Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

Wang

Chan

Zhao

et al. 2021

Advanced Optical Materials

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“…In most prior work, a swelling agent preferentially absorbed by one of the two BCP domains was used to ensure the mechanical stability of a BCP PC upon swelling ( 5 – 8 ). A variety of domain swelling agents have been demonstrated, including solvents, ionic liquids, sol-gel precursors, and photocrosslinkable hydrogels, giving rise to visible range SCs of BCP PCs, which are readily changed upon subsequent stimulation ( 6 – 8 , 15 , 23 ).…”

Section: Introductionmentioning

confidence: 99%

Visualization of nonsingular defect enabling rapid control of structural color

et al. 2022

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Stimuli-interactive structural color (SC) of a block copolymer (BCP) photonic crystal (PC) uses reversible alteration of the PC using external fluids and applied forces. The origin of the diffusional pathways of a stimulating fluid into a BCP PC has not been examined. Here, we directly visualize the vertically oriented screw dislocations in a one-dimensional lamellar BCP PC that facilitate the rapid response of visible SC. To reveal the diffusional pathway of the solvent via the dislocations, BCP lamellae are swollen with an interpenetrated hydrogel network, allowing fixation of the swollen state and subsequent microscopic examination. The visualized defects are low-energy helicoidal screw dislocations having unique, nonsingular cores. Location and areal density of these dislocations are determined by periodic concentric topographic nanopatterns of the upper surface-reconstructed layer. The nonsingular nature of the interlayer connectivity in the core region demonstrates the beneficial nature of these defects on sensing dynamics.

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“…Block copolymers (BCPs) have also been widely used for creating photonic crystals via microphase separation. Early studies mainly focused on the self-assembly of linear BCPs, − and ultra-high molecular weight samples are required to create nanostructures large enough to reflect visible light. Super slow self-assembly kinetics are typically observed due to severe polymer chain entanglements.…”

Section: Introductionmentioning

confidence: 99%

Rapid Responsive Mechanochromic Photonic Pigments with Alternating Glassy-Rubbery Concentric Lamellar Nanostructures

Dong

Song

et al. 2021

ACS Nano

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Photonic pigment particles prepared via self-assembly have been suffering from their poor mechanical performances; i.e., they can easily be damaged and lose structural color under a compression force. This greatly limits their uses as mechanochromic pigments. Here, a nanoscale concentric lamellar structure of alternating glassy-rubbery microdomains is successfully created within photonic microparticles through a confined self-assembly and photo-cross-linking strategy. The glassy domain is composed of polystyrene, and cross-linked bottlebrush polydimethylsiloxane served as the supersoft elastic domain. The obtained photonic structure not only shows large deformation and visible color changes under a loaded compression force but also rapidly recovers to its original state in less than 1 s (∼0.16 s) upon unloading. Continuously loading-unloading micro compression test indicates that no obvious damage can be identified after 250 cycles, indicating the high durability of the pigments against deformation. These pigments with different reflected colors are simply obtained using bottlebrush block copolymer formulations with tunable weight percentages of polymer additives. The mechanical robust photonic pigments may be useful in many important applications.

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Thermo‐Adaptive Block Copolymer Structural Color Electronics

Cited by 43 publications

References 41 publications

Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

Visualization of nonsingular defect enabling rapid control of structural color

Rapid Responsive Mechanochromic Photonic Pigments with Alternating Glassy-Rubbery Concentric Lamellar Nanostructures

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