1
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Hu Y, Qi C, Ma D, Yang D, Huang S. Multicolor recordable and erasable photonic crystals based on on-off thermoswitchable mechanochromism toward inkless rewritable paper. Nat Commun 2024; 15:5643. [PMID: 38969630 PMCID: PMC11226673 DOI: 10.1038/s41467-024-49860-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 06/21/2024] [Indexed: 07/07/2024] Open
Abstract
Mechanochromic photonic crystals are attractive due to their force-dependent structural colors; however, showing unrecordable color and unsatisfied performances, which significantly limits their development and expansion toward advanced applications. Here, a thermal-responsive mechanochromic photonic crystal with a multicolor recordability-erasability was fabricated by combining non-close-packing mechanochromic photonic crystals and phase-change materials. Multicolor recordability is realized by pressing thermal-responsive mechanochromic photonic crystals to obtain target colors over the phase-change temperature followed by fixing the target colors and deformed configuration at room temperature. The stable recorded color can be erased and reconfigured by simply heating and similar color-recording procedures respectively due to the thermoswitchable on-off mechanochromism of thermal-responsive mechanochromic photonic crystals along with solid-gel phase transition. These thermal-responsive mechanochromic photonic crystals are ideal rewritable papers for ink-freely achieving multicolor patterns with high resolution, difficult for conventional photonic papers. This work offers a perspective for designing color-recordable/erasable and other stimulus-switchable materials with advanced applications.
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Affiliation(s)
- Yang Hu
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Chenze Qi
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Dekun Ma
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China
| | - Dongpeng Yang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China.
| | - Shaoming Huang
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China.
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2
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Park D, Kim W, Park C, Choi J, Ghorai A, Lee G, Choi S, Moon W, Jeong U. Interactive Deformable Colored Sound Display Achieved with Electrostrictive Fluoropolymer and Halide Perovskite. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402281. [PMID: 39031625 DOI: 10.1002/smll.202402281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/26/2024] [Indexed: 07/22/2024]
Abstract
The association of color and sound helps human cognition through a synergetic effect like intersensory facilitation. Although soft human-machine interfaces (HMIs) providing unisensory expression have been widely developed, achieving synchronized optic and acoustic expression in one device system has been relatively less explored. It is because their operating principles are different in terms of materials, and implementation has mainly been attempted through structural approaches. Here, a deformable sound display is developed that generates multiple colored lights with large sound at low input voltage. The device is based on alternating-current electroluminescence (ACEL) covered with perovskite composite films. A sound wave is created by a polymer matrix of the ACEL, while simultaneously, various colors are produced by the perovskite films and the blue electroluminescence (EL) emitted from the phosphors in the ACEL. By patterning different colored perovskite films onto the ACELs, associating the color and the sound is successfully demonstrated by a piano keyboard and a wearable interactive device.
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Affiliation(s)
- Doowon Park
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Woongji Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Chaeyong Park
- Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Jun Choi
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Arup Ghorai
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Gilwoon Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Seungmoon Choi
- Department of Computer Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Wonkyu Moon
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
| | - Unyong Jeong
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea
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3
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Nam S, Jung W, Shin JH, Choi SS. Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers. LIGHT, SCIENCE & APPLICATIONS 2024; 13:114. [PMID: 38773092 PMCID: PMC11109264 DOI: 10.1038/s41377-024-01470-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 04/12/2024] [Accepted: 05/07/2024] [Indexed: 05/23/2024]
Abstract
Wavelength-tunable structural colors using stimuli-responsive materials, such as chiral liquid crystals (CLCs), have attracted increasing attention owing to their high functionality in various tunable photonic applications. Ideally, on-demand omnidirectional wavelength control is highly desirable from the perspective of wavelength-tuning freedom. However, despite numerous previous research efforts on tunable CLC structural colors, only mono-directional wavelength tuning toward shorter wavelengths has been employed in most studies to date. In this study, we report the ideally desired omnidirectional wavelength control toward longer and shorter wavelengths with significantly improved tunability over a broadband wavelength range. By using areal expanding and contractive strain control of dielectric elastomer actuators (DEAs) with chiral liquid crystal elastomers (CLCEs), simultaneous and omnidirectional structural color-tuning control was achieved. This breakthrough in omnidirectional wavelength control enhances the achievable tuning freedom and versatility, making it applicable to a broad range of high-functional photonic applications.
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Affiliation(s)
- Seungmin Nam
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Wontae Jung
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Jun Hyuk Shin
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Su Seok Choi
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea.
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4
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Lee YH, Song WJ, Park JM, Sung G, Lee MG, Kim M, Park S, Lee JS, Kim M, Kim WS, Sun JY. Full-Color Generation via Phototunable Mono Ink for Fast and Elaborate Printings. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2307165. [PMID: 37945054 DOI: 10.1002/adma.202307165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/23/2023] [Indexed: 11/12/2023]
Abstract
Unlike pigment-based colors, which are determined by their molecular structure, diverse colors can be expressed by a regular arrangement of nanomaterials. However, existing techniques for constructing such nanostructures have struggled to combine high precision and speed, resulting in a narrow gamut, and prolonged color fabrication time. Here, this work reports a phototunable mono ink that can generate a wide range of colors by controlling regularly arranged nanostructure. Core-shell growth controlled by polymerization time precisely regulates the distance between arranged particles at a nanometer-scale, enabling the generation of various colors. Moreover, the wide and thin arrangement induces constrained out-of-plane growth, thus facilitating the intricate color generation at the desired location via photopolymerization. Upon terminating polymerization by oxygen gas, the generated colors are readily fixed and kept stable. Utilizing programmed ultraviolet illumination, large-scale and high-resolution (≈1 µm) full-color printings are demonstrated at high speed (100 mm2 s-1 ).
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Affiliation(s)
- Yun Hyeok Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Won Jun Song
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jae-Man Park
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Gimin Sung
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Min-Gyu Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Miji Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sungeun Park
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Ju Sang Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Miyoung Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Wook Sung Kim
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, Republic of Korea
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5
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Wang Y, Kan X, Liu Y, Ju J, Yao X. Nacre-inspired layered composite gels with broad tunable mechanical strength and structural color for stress visualization. NANOSCALE 2023; 15:9060-9068. [PMID: 37158095 DOI: 10.1039/d3nr01362f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The brick-and-mortar architecture of nacre shells brings radiant structural colors, high toughness, and strength, inspiring numerous designs for structural and optical materials. However, constructing structural color is not always easy, especially among soft materials where aligning components against random and dynamically active environments is generally difficult. Here, we propose a composite organohydrogel capable of visualizing multiple levels of stress, featuring broad tunable mechanical properties, dynamic mechanochromism, deep low working temperatures, and anti-drying attributes. In the composite gels, the intercalation between α-zirconium phosphate (α-ZrP) nanoplates and poly-(diacetone acrylamide-co-acrylamide) is induced by shear-orientation-assisted self-assembly followed by solvent replacement. The highly tailorable (from ∼780 nm to ∼445 nm) range of colors was achieved by regulating the concentration of α-ZrP and glycerol inside the matrix. With the help from glycerol, the composite gels exhibited long-term stability (7 d) in the arid condition and remarkable low-temperature tolerance (-80 °C). The extraordinary mechanical property (compressive strength up to 119 MPa) of composite gels is achieved by the assembled α-ZrP plates with a small aspect ratio, high negative charge repulsion, and abundant hydrogen bonding sites. As a result, the mechanochromic sensor based on the composite gel enjoys a wide range of stress detection (0-1862 KPa). This study provides a new strategy for constructing high strength structural-colored gels, opening up opportunities for sensitive yet strong mechanochromic sensors in extreme environments.
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Affiliation(s)
- Yunpeng Wang
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials and Engineering, Henan University, Kaifeng 475000, China.
| | - Xinyu Kan
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials and Engineering, Henan University, Kaifeng 475000, China.
| | - Yaru Liu
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials and Engineering, Henan University, Kaifeng 475000, China.
| | - Jie Ju
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials and Engineering, Henan University, Kaifeng 475000, China.
| | - Xi Yao
- Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials and Engineering, Henan University, Kaifeng 475000, China.
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6
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Fu Q, Yu W, Bao G, Ge J. Electrically responsive photonic crystals with bistable states for low-power electrophoretic color displays. Nat Commun 2022; 13:7007. [DOI: 10.1038/s41467-022-34745-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 11/06/2022] [Indexed: 11/17/2022] Open
Abstract
AbstractElectrically responsive photonic crystals are promising materials for electrophoretic color displays with better brightness and color saturation. However, electric field must always be applied to maintain the specific colors, which brings concerns about the power consumption and signal stability and reversibility. Here, we show an electrically responsive photonic crystal with two stable states at 0 V, which are the colored state or the colorless state with ordered or disordered particle arrangement. The color state can be reversibly switched by applying a short-time electrical field, just like in the case of commercial electrophoretic ink. With optimized recipe and electric field, the photonic crystals encapsulated in the prototype display panel are proved to have potentials in high resolution, multi-color, and greyscale display, which lays down a firm basis for reflective displays with low power consumption and good visibility.
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7
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Zhang X, Yang Y, Xue P, Valenzuela C, Chen Y, Yang X, Wang L, Feng W. Three‐Dimensional Electrochromic Soft Photonic Crystals Based on MXene‐Integrated Blue Phase Liquid Crystals for Bioinspired Visible and Infrared Camouflage. Angew Chem Int Ed Engl 2022; 61:e202211030. [DOI: 10.1002/anie.202211030] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Indexed: 12/16/2022]
Affiliation(s)
- Xuan Zhang
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Yanzhao Yang
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Pan Xue
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Cristian Valenzuela
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Yuanhao Chen
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Xiao Yang
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
| | - Ling Wang
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
- Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300350 P. R. China
| | - Wei Feng
- School of Materials Science and Engineering Tianjin University Tianjin 300350 P. R. China
- Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300350 P. R. China
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8
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Park JM, Lim S, Sun JY. Materials development in stretchable iontronics. SOFT MATTER 2022; 18:6487-6510. [PMID: 36000330 DOI: 10.1039/d2sm00733a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Stretchable iontronics have recently been developed as an ideal interface to promote the interaction between humans and devices. Since the materials that use ions as charge carriers are typically transparent and stretchable, they have been used to fabricate devices with diverse functions with intrinsic transparency and stretchability. With the development of device design, material design has also been investigated to mitigate the issues associated with ionic materials, such as their weak mechanical properties, poor electrical properties, or poor environmental stabilities. In this review, we describe the recent progress on the design of materials in stretchable iontronics. By classifying stretchable ionic materials into three types of components (ionic conductors, ionic semiconductors, and ionic insulators), the issues each component has and the strategies to solve them are introduced, specifically in terms of molecular interactions. We then discuss the existing hurdles and challenges to be handled and shine light on the possibilities and opportunities from the insight of molecular interactions.
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Affiliation(s)
- Jae-Man Park
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Sungsoo Lim
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea.
- Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea
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9
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Zhang X, Yang Y, Xue P, Valenzuela C, Chen Y, Yang X, Wang L, Feng W. Three‐Dimensional Electrochromic Soft Photonic Crystals Based on MXene‐Integrated Blue Phase Liquid Crystals for Bioinspired Visible and Infrared Camouflage. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuan Zhang
- Tianjin University Materials Science and Engineering CHINA
| | - Yanzhao Yang
- Tianjin University Materials Science and Engineering CHINA
| | - Pan Xue
- Tianjin University Materials Science and Engineering CHINA
| | | | - Yuanhao Chen
- Tianjin University Materials Science and Engineering CHINA
| | - Xiao Yang
- Tianjin University Materials Science and Engineering CHINA
| | - Ling Wang
- Tianjin University Materials Science and Engineering School of Materials Science and Engineering, Tianjin University 300072 Tianjin CHINA
| | - Wei Feng
- Tianjin University Materials Science and Engineering CHINA
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10
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Shin JH, Park JY, Han SH, Lee YH, Sun J, Choi SS. Color-Tuning Mechanism of Electrically Stretchable Photonic Organogels. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202897. [PMID: 35798315 PMCID: PMC9443443 DOI: 10.1002/advs.202202897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Indexed: 06/15/2023]
Abstract
In contrast to nano-processed rigid photonic crystals with fixed structures, soft photonic organic hydrogel beads with dielectric nanostructures possess advanced capabilities, such as stimuli-responsive deformation and photonic wavelength color changes. Recenlty, advanced from well-investigated mechanochromic method, an electromechanical stress approach is used to demonstrate electrically induced mechanical color shifts in soft organic photonic hydrogel beads. To better understand the electrically stretchable color change functionality in such soft organic photonic hydrogel systems, the electromechanical wavelength-tuning mechanism is comprehensively investigated in this study. By employing controllable electroactive dielectric elastomeric actuators, the discoloration wavelength-tuning process of an electrically stretchable photonic organogel is carefully examined. Based on the experimental in-situ response of electrically stretchable nano-spherical polystyrene hydrogel beads, the color change mechanism is meticulously analyzed. Further, changes in the nanostructure of the symmetrically and electrically stretchable organogel are analytically investigated through simulations of its hexagonal close-packed (HCP) lattice model. Detailed photonic wavelength control factors, such as the refractive index of dielectric materials, lattice diffraction, and bead distance in an organogel lattice, are theoretically studied. Herein, the switcing mechanism of electrically stretchable mechanochromic photonic organogels with photonic stopband-tuning features are suggested for the first time.
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Affiliation(s)
- Jun Hyuk Shin
- Department of Electrical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam GuPohangGyeongbuk37673Republic of Korea
| | - Ji Yoon Park
- Department of Electrical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam GuPohangGyeongbuk37673Republic of Korea
| | - Sang Hyun Han
- Department of Electrical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam GuPohangGyeongbuk37673Republic of Korea
| | - Yun Hyeok Lee
- Department of Materials Science and EngineeringSeoul National UniversitySeoul08826Republic of Korea
| | - Jeong‐Yun Sun
- Department of Materials Science and EngineeringSeoul National UniversitySeoul08826Republic of Korea
- Research Institute of Advanced MaterialsSeoul National UniversitySeoul08826Korea
| | - Su Seok Choi
- Department of Electrical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam GuPohangGyeongbuk37673Republic of Korea
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11
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Xiao M, Mao J, Kollosche M, Hwang V, Clarke DR, Manoharan VN. Voltage-tunable elastomer composites that use shape instabilities for rapid structural color changes. MATERIALS HORIZONS 2022; 9:1954-1961. [PMID: 35579252 DOI: 10.1039/d2mh00374k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Structurally colored materials can switch colors in response to external stimuli, which makes them potentially useful as colorimetric sensors, dynamic displays, and camouflage. However, their applications are limited by the angular dependence, slow response, and absence of synchronous control in time and space. In addition, out-of-plane deformation from shape instability easily occurs in photonic films, leading to inhomogeneous colors in photonic-crystal materials. To address these challenges, we combine structurally colored photonic glasses and dielectric elastomer actuators. We use an external voltage signal to tune color changes quickly (much less than 0.1 s). The photonic glassses produce colors with low angular dependence, so that their colors are homogeneous even when they become curved due to voltage-triggered instabilities (buckling or wrinkling). As proof of concept, we present a pixelated display in which segments can be independently and rapidly turned on and off. This wide-angle, instability-tolerant, color-changing platform could be used in next-generation soft and curved color displays, camouflage with both shape and color changes, and multifunctional sensors.
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Affiliation(s)
- Ming Xiao
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Jie Mao
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
- College of Chemical Engineering, Ningxia University, Yinchuan City, 750021, China
| | - Matthias Kollosche
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
| | - Victoria Hwang
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
| | - David R Clarke
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
| | - Vinothan N Manoharan
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA
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12
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Double-Network Hydrogel for Stretchable Triboelectric Nanogenerator and Integrated Electroluminescent Skin with Self-Powered Rapid Visual Sensing. ELECTRONICS 2022. [DOI: 10.3390/electronics11131928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Bio-inspired design plays a very significant role in adapting biological models to technical applications of flexible electronics. The flexible, stretchable, and portable electrode is one of the key technical challenges in the field. Inspired by the responses to mechanical stimuli of natural plants, we designed a highly transparent (over 95%), stretchable (over 1500%), and biocompatible electrode material by using polymerized double-network hydrogel for fabricating a triboelectric nanogenerator (SH-TENG). The SH-TENG can convert tiny mechanical stretching from human movements directly into electrical energy, and is capable of lighting up to 50 LEDs. Benefiting from bio-inspired design, the coplanar, non-overlapping electrode structure breaks through the limitations of conventional electrodes in wearable devices and overcomes the bottleneck of transparent materials. Furthermore, a self-powered raindrop visual sensing system was realized, which can perform quasi-real-time rainfall information monitoring and increase rainfall recognition ability of vehicle automatic driving systems. This study provides a novel strategy for making next-generation stretchable electronic devices and flexible visual sensing systems.
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13
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Kim HW, Kim E, Oh J, Lee H, Jeong U. Water-Saturated Ion Gel for Humidity-Independent High Precision Epidermal Ionic Temperature Sensor. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200687. [PMID: 35338604 PMCID: PMC9165521 DOI: 10.1002/advs.202200687] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/08/2022] [Indexed: 06/04/2023]
Abstract
Although ion gels are attractive sensing materials for deformable epidermal sensors or implantable devices, their sensing performances are highly affected by environmental humidity change, so that their sensing reliability cannot be secured. This study proposes a new concept of maintaining the high-precision temperature sensing performance of highly deformable ion gel sensors. In this approach, a hydrophobic ion gel sensing layer is kept water-saturated by attaching a hydrogel layer, rather than attempting to completely block water penetration. This study performs experimental and theoretical investigation on water concentration in the ion gel, using the analysis of mass transportation at the interface of the ion gel and the hydrogel. By using the charge relaxation time of the ionic molecules, the temperature sensor is not affected by environmental humidity in the extreme range of humidity (30%-100%). This study demonstrates a highly deformable on-skin temperature sensor which shows the same performance either in water or dry state and while exercising with large strains (ε = 50%).
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Affiliation(s)
- Hyun Woo Kim
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam‐Gu, PohangGyeongsangbuk‐Do37673Republic of Korea
| | - Eunseo Kim
- Department of Chemical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam‐Gu, PohangGyeongsangbuk‐Do37673Republic of Korea
| | - Joosung Oh
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam‐Gu, PohangGyeongsangbuk‐Do37673Republic of Korea
| | - Hyomin Lee
- Department of Chemical EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam‐Gu, PohangGyeongsangbuk‐Do37673Republic of Korea
| | - Unyong Jeong
- Department of Materials Science and EngineeringPohang University of Science and Technology (POSTECH)77 Cheongam‐Ro, Nam‐Gu, PohangGyeongsangbuk‐Do37673Republic of Korea
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14
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Choi S, Zhao Z, Zuo J, Faruque HMR, Yao Y, Wang C. Structural color printing via polymer-assisted photochemical deposition. LIGHT, SCIENCE & APPLICATIONS 2022; 11:84. [PMID: 35387968 PMCID: PMC8986859 DOI: 10.1038/s41377-022-00776-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 03/12/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Structural color printings have broad applications due to their advantages of long-term sustainability, eco-friendly manufacturing, and ultra-high resolution. However, most of them require costly and time-consuming fabrication processes from nanolithography to vacuum deposition and etching. Here, we demonstrate a new color printing technology based on polymer-assisted photochemical metal deposition (PPD), a room temperature, ambient, and additive manufacturing process without requiring heating, vacuum deposition or etching. The PPD-printed silver films comprise densely aggregated silver nanoparticles filled with a small amount (estimated <20% volume) of polymers, producing a smooth surface (roughness 2.5 nm) even better than vacuum-deposited silver films (roughness 2.8 nm) at ~4 nm thickness. Further, the printed composite films have a much larger effective refractive index n (~1.90) and a smaller extinction coefficient k (~0.92) than PVD ones in the visible wavelength range (400 to 800 nm), therefore modulating the surface reflection and the phase accumulation. The capability of PPD in printing both ultra-thin (~5 nm) composite films and highly reflective thicker film greatly benefit the design and construction of multilayered Fabry-Perot (FP) cavity structures to exhibit vivid and saturated colors. We demonstrated programmed printing of complex pictures of different color schemes at a high spatial resolution of ~6.5 μm by three-dimensionally modulating the top composite film geometries and dielectric spacer thicknesses (75 to 200 nm). Finally, PPD-based color picture printing is demonstrated on a wide range of substrates, including glass, PDMS, and plastic, proving its broad potential in future applications from security labeling to color displays.
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Affiliation(s)
- Shinhyuk Choi
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Zhi Zhao
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA
- Biodesign Center for Molecular Design and Biomimetics, Arizona State University, Tempe, AZ, 85287, USA
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, China
| | - Jiawei Zuo
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | | | - Yu Yao
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA
| | - Chao Wang
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA.
- Biodesign Center for Molecular Design and Biomimetics, Arizona State University, Tempe, AZ, 85287, USA.
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15
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Hu Y, Wei B, Yang D, Ma D, Huang S. Chameleon-Inspired Brilliant and Sensitive Mechano-Chromic Photonic Skins for Self-Reporting the Strains of Earthworms. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11672-11680. [PMID: 35226808 DOI: 10.1021/acsami.2c00561] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The skins of chameleons have attracted growing interest because they have sensitive mechano-chromic properties and bright colors due to the large surface-to-surface distances (Ds-s) between neighboring particles and contrast of the refractive index (Δn), respectively. Inspired by these, artificial mechano-chromic photonic skins (MPSs) mimicking those of chameleons were fabricated by the large Δn and Ds-s. The fabrication is considerably simple and efficient based on the self-assembly strategy using commercial chemicals and materials. The reflectance of MPSs depends on the value of Δn, which can be greatly increased to 70% with a Δn of 0.035, leading to their brilliant colors. Because of the large Ds-s, the MPSs possess outstanding mechano-chromic performances, including a large maximal (Δλ = 205 nm) and effective (Δλe = 184 nm) tuning range of the reflection wavelength, high sensitivity (368), fast responsiveness (2.2 nm/ms), good stabilities (>1 year), and reversibility (>100 times). Based on these advantages, MPSs have been used for self-reporting the strain of earthworms by outputting diverse colors during the peristaltic process, indicating the great potential of the MPSs as visual sensors and optical coatings.
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Affiliation(s)
- Yang Hu
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Boru Wei
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Dongpeng Yang
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Dekun Ma
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, PR China
| | - Shaoming Huang
- School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou 510006, P. R. China
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16
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Ming X, Zhang C, Cai J, Zhu H, Zhang Q, Zhu S. Highly Transparent, Stretchable, and Conducting Ionoelastomers Based on Poly(ionic liquid)s. ACS APPLIED MATERIALS & INTERFACES 2021; 13:31102-31110. [PMID: 34170105 DOI: 10.1021/acsami.1c05833] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rapid development of soft electronics has revitalized the research of conducting elastomers. However, the design of conducting elastomers having high stretchability and good transparency still remains a considerable challenge. In this study, we develop a highly transparent, stretchable, and conducting ionoelastomer based on a poly(ionic liquid) in which cations are fixed to a stretchable elastomeric network and counter anions are mobile. The ionoelastomer solves the dilemma of simultaneous transparency and stretchability in the design of traditional conducting elastomers, possessing good transparency (96%) with an extraordinarily high stretchability, up to a limiting strain of 1460%. Moreover, this novel material is completely nonvolatile and nonhygroscopic, endowing the ionoelastomer with highly stable thermal, environmental, electrochemical, and mechanoelectrical properties. An underwater sensor based on the ionoelastomer is developed with good performance in an aqueous environment. Also, a transparent dielectric elastomer actuator (DEA) is demonstrated using the ionoelastomer. It is believed that the ionoelastomer would pave the way to develop exceptional conducting elastomers toward next-generation soft electronics.
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Affiliation(s)
- Xiaoqing Ming
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Changgeng Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| | - Junjie Cai
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| | - He Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| | - Qi Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
| | - Shiping Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong 518172, P. R. China
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17
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Wang J, Gao D, Lee PS. Recent Progress in Artificial Muscles for Interactive Soft Robotics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003088. [PMID: 33108022 DOI: 10.1002/adma.202003088] [Citation(s) in RCA: 71] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/21/2020] [Indexed: 06/11/2023]
Abstract
Artificial muscles are the core components of the smart and interactive soft robotic systems, providing the capabilities in shape morphing, manipulation, and mobility. Intense research efforts in the development of artificial muscles are based on the dielectric elastomer actuators, pneumatic actuators, electrochemical actuators, soft magnetic actuators, and stimulus responsive polymers. Recent progress has presented artificial muscles with impressive specific power output exceeding that of the natural muscles, dexterous shape morphing behavior that can be programmed and reconfigured, and exceptional high maneuverability to traverse surfaces with obstacles and different textures. Here, a succinct and critical summary is provided on the materials and strategies that have contributed to the important advancement of the artificial muscles in recent research. On that basis, the exciting opportunities are discussed in the integration of soft electronic devices with artificial muscles to enable smart and interactive soft robotic systems.
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Affiliation(s)
- Jiangxin Wang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China
| | - Dace Gao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Pooi See Lee
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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18
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Yang W, Yamamoto S, Sueyoshi K, Inadomi T, Kato R, Miyamoto N. Perovskite Nanosheet Hydrogels with Mechanochromic Structural Color. Angew Chem Int Ed Engl 2021; 60:8466-8471. [PMID: 33480099 DOI: 10.1002/anie.202015982] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Indexed: 12/26/2022]
Abstract
Structural color colloidal sols of perovskite nanosheets were synthesized and were immobilized in a polymer hydrogel film by in situ photopolymerization, leading to a novel mechanochromic material. Visible absorption spectroscopy, polarized optical microscopy and small-angle X-ray scattering revealed that the nanosheets are aligned parallel to the film surface with the periodic distance of up to ca. 300 nm, giving the structural color tunable over full color range. The present structural color gel showed reversible mechanochromic response that detects weak stress of 1 kPa with the quick response time less than 1 ms as well as high mechanical toughness (compressive breaking stress of up to 3 MPa). These excellent properties are suitable for applications for mechano-sensors and displays.
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Affiliation(s)
- Wenqi Yang
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
| | - Shinya Yamamoto
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
| | - Keiichiro Sueyoshi
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
| | - Takumi Inadomi
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
| | - Riki Kato
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
| | - Nobuyoshi Miyamoto
- Graduate School of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka, 811-0295, Japan
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19
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Yang W, Yamamoto S, Sueyoshi K, Inadomi T, Kato R, Miyamoto N. Perovskite Nanosheet Hydrogels with Mechanochromic Structural Color. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015982] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wenqi Yang
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
| | - Shinya Yamamoto
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
| | - Keiichiro Sueyoshi
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
| | - Takumi Inadomi
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
| | - Riki Kato
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
| | - Nobuyoshi Miyamoto
- Graduate School of Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-higashi Higashi-ku Fukuoka 811-0295 Japan
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20
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Clough JM, Weder C, Schrettl S. Mechanochromism in Structurally Colored Polymeric Materials. Macromol Rapid Commun 2020; 42:e2000528. [PMID: 33210385 DOI: 10.1002/marc.202000528] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/02/2020] [Indexed: 01/03/2023]
Abstract
Mechanochromic effects in structurally colored materials are the result of deformation-induced changes to their ordered nanostructures. Polymeric materials which respond in this way to deformation offer an attractive combination of characteristics, including continuous strain sensing, high strain resolution, and a wide strain-sensing range. Such materials are potentially useful for a wide range of applications, which extend from pressure-sensing bandages to anti-counterfeiting devices. Focusing on the materials design aspects, recent developments in this field are summarized. The article starts with an overview of different approaches to achieve mechanochromic effects in structurally colored materials, before the physical principles governing the interaction of light with each of these materials types are summarized. Diverse methodologies to prepare these polymers are then discussed in detail, and where applicable, naturally occurring materials that inspired the design of artificial systems are discussed. The capabilities and limitations of structurally colored materials in reporting and visualizing mechanical deformation are examined from a general standpoint and also in more specific technological contexts. To conclude, current trends in the field are highlighted and possible future opportunities are identified.
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Affiliation(s)
- Jess M Clough
- Adolphe Merkle Institute, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Stephen Schrettl
- Adolphe Merkle Institute, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
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21
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Lee J, Kim J, Lee M. High-purity reflective color filters based on thin film cavities embedded with an ultrathin Ge 2Sb 2Te 5 absorption layer. NANOSCALE ADVANCES 2020; 2:4930-4937. [PMID: 36132919 PMCID: PMC9418997 DOI: 10.1039/d0na00626b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 08/28/2020] [Indexed: 05/02/2023]
Abstract
A thin film cavity formed by stacking metal-insulator-metal (MIM) continuous layers is of significant interest as a lithography-free and scalable color-filtering structure. Such a cavity can selectively transmit a certain frequency range of incident light, thus producing vivid transmission colors. However, the generation of reflection colors with high purity and reflectivity is a challenge because a cavity in reflection mode resonantly absorbs a narrow range of wavelengths and reflects the remaining spectrum. This study shows that highly pure and reflective colors can be obtained by embedding an ultrathin Ge2Sb2Te5 layer within the cavity. Because the MIM structure exhibits a nonuniform intensity distribution across the insulator layer, the approach is to place the Ge2Sb2Te5 layer in a high-intensity region within the insulator and thereby create another absorption band in addition to the cavity resonance mode. When combined with the refractive-index engineering of the metal layer, this approach leads to red, green, and blue colors having a bandwidth of ∼100 nm and a reflection efficiency of 90%. The results of the study may be effectively utilized in numerous applications, including reflective color filters, colorimetric sensors, and surface decorations.
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Affiliation(s)
- Junho Lee
- Department of Materials Science and Engineering, Yonsei University Seoul 120-749 Korea
| | - Jaeyong Kim
- Department of Materials Science and Engineering, Yonsei University Seoul 120-749 Korea
| | - Myeongkyu Lee
- Department of Materials Science and Engineering, Yonsei University Seoul 120-749 Korea
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22
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Shi L, Jia K, Gao Y, Yang H, Ma Y, Lu S, Gao G, Bu H, Lu T, Ding S. Highly Stretchable and Transparent Ionic Conductor with Novel Hydrophobicity and Extreme-Temperature Tolerance. RESEARCH 2020; 2020:2505619. [PMID: 33029586 PMCID: PMC7520821 DOI: 10.34133/2020/2505619] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 02/27/2020] [Indexed: 11/14/2022]
Abstract
Highly stretchable and transparent ionic conducting materials have enabled new concepts of electronic devices denoted as iontronics, with a distinguishable working mechanism and performances from the conventional electronics. However, the existing ionic conducting materials can hardly bear the humidity and temperature change of our daily life, which has greatly hindered the development and real-world application of iontronics. Herein, we design an ion gel possessing unique traits of hydrophobicity, humidity insensitivity, wide working temperature range (exceeding 100°C, and the range covered our daily life temperature), high conductivity (10−3~10−5 S/cm), extensive stretchability, and high transparency, which is among the best-performing ionic conductors ever developed for flexible iontronics. Several ion gel-based iontronics have been demonstrated, including large-deformation sensors, electroluminescent devices, and ionic cables, which can serve for a long time under harsh conditions. The designed material opens new potential for the real-world application progress of iontronics.
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Affiliation(s)
- Lei Shi
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Kun Jia
- State Key Laboratory for Strength and Vibration of Mechanical Structure, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yiyang Gao
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hua Yang
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yaming Ma
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shiyao Lu
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guoxin Gao
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
| | - Huaitian Bu
- SINTEF Industry, Forskningsvei 1, 0373 Oslo, Norway
| | - Tongqing Lu
- State Key Laboratory for Strength and Vibration of Mechanical Structure, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shujiang Ding
- Department of Applied Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
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23
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Lee Y, Song WJ, Jung Y, Yoo H, Kim MY, Kim HY, Sun JY. Ionic spiderwebs. Sci Robot 2020; 5:5/44/eaaz5405. [PMID: 33022609 DOI: 10.1126/scirobotics.aaz5405] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 06/04/2020] [Indexed: 01/30/2023]
Abstract
Spiders use adhesive, stretchable, and translucent webs to capture their prey. However, sustaining the capturing capability of these webs can be challenging because the webs inevitably invite contamination, thus reducing its adhesion force. To overcome these challenges, spiders have developed strategies of using webs to sense prey and clean contaminants. Here, we emulate the capturing strategies of a spider with a single pair of ionic threads based on electrostatics. Our ionic spiderwebs completed consecutive missions of cleaning contamination on itself, sensing approaching targets, capturing those targets, and releasing them. The ionic spiderwebs demonstrate the importance of learning from nature and push the boundaries of soft robotics in an attempt to combine mutually complementary functions into a single unit with a simple structure.
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Affiliation(s)
- Younghoon Lee
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Won Jun Song
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Yeonsu Jung
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Hyunjae Yoo
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Man-Yong Kim
- Eumam Middle School, 147 Chilgeori-ro, Eumam-myeon, Seosan-si, Chungcheongnam-do 31936, South Korea
| | - Ho-Young Kim
- Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea.
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea. .,Research Institute of Advanced Materials (RIAM), Seoul National University 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
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24
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Zhao P, Xu B, Zhang Y, Li B, Chen H. Study on the Twisted and Coiled Polymer Actuator with Strain Self-Sensing Ability. ACS APPLIED MATERIALS & INTERFACES 2020; 12:15716-15725. [PMID: 32141730 DOI: 10.1021/acsami.0c01179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Twisted and coiled polymer actuators (TCAs) are a kind of efficient artificial muscles, which have good prospects for application in soft robots, bionic devices, and biological, medical, and other high-tech fields. However, the inability to dynamically sense and adjust the strain of the actuator will lead to uncertainty in the accuracy of deformation and strain, resulting in imprecise target action. Herein, TCAs with strain self-sensing ability (TCASA) are prepared by integrating the stretchable optomechanical film (SOMF) sensors into TCAs, which provides a simple strategy for dynamical strain sensing. These SOMFs have a wide range of color changes during deformation of TCAs, and the strain is perceived by observing the color change according to the corresponding relationship between color change and strain. Furthermore, the proposed TCASA maintain excellent cycling stability of strain self-sensing during cyclic tests (200 cycles) and excellent strain self-sensing performance to perform strain control compared to TCAs without SOMFs. The results indicate that the proposed structure is a promising soft actuator with excellent strain self-sensing ability, which is well suited for soft robots, bionic devices, biological and medical fields, smart wearable technologies, and so forth, especially when controlled, repetitive deformations are required.
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Affiliation(s)
- Pengfei Zhao
- State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Shaanxi Key Laboratory of Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, P. R. China
| | - Bo Xu
- State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Shaanxi Key Laboratory of Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yakun Zhang
- Shaanxi Key Laboratory of Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Bo Li
- Shaanxi Key Laboratory of Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Hualing Chen
- State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Shaanxi Key Laboratory of Intelligent Robots, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
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25
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Cho S, Kang D, Lee H, Kim MP, Kang S, Shanker R, Ko H. Highly Stretchable Sound-in-Display Electronics Based on Strain-Insensitive Metallic Nanonetworks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 8:2001647. [PMID: 33437570 PMCID: PMC7788580 DOI: 10.1002/advs.202001647] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/18/2020] [Indexed: 05/27/2023]
Abstract
The growing importance of human-machine interfaces and the rapid expansion of the internet of things (IoT) have inspired the integration of displays with sound generation systems to afford stretchable sound-in-display devices and thus establish human-to-machine connections via auditory system visualization. Herein, the synchronized generation of sound and color is demonstrated for a stretchable sound-in-display device with electrodes of strain-insensitive silver nanowires (AgNWs) and emissive layers of field-induced inorganic electroluminescent (EL) phosphors. In this device, EL phosphors embedded in a dielectric elastomer actuator (DEA) emit light under alternating-current bias, while audible sound waves are simultaneously generated via DEA actuation along with input sound signals. The electroluminescence and sound-generation performances of the fabricated device are highly robust and reliable, being insensitive to stretch-release cycling because of the presence of the AgNW stretchable electrodes. The presented principle of integrating light emission and acoustic systems in a single stretchable device can be further expanded to realize sound-in-display electronics for IoT and human-machine interface applications.
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Affiliation(s)
- Seungse Cho
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Dong‐hee Kang
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Hyejin Lee
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Minsoo P. Kim
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Saewon Kang
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Ravi Shanker
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
| | - Hyunhyub Ko
- School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan Metropolitan City689‐798Republic of Korea
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Chen K, Zhang Y, Ge J. Highly Invisible Photonic Crystal Patterns Encrypted in an Inverse Opaline Macroporous Polyurethane Film for Anti-Counterfeiting Applications. ACS APPLIED MATERIALS & INTERFACES 2019; 11:45256-45264. [PMID: 31710201 DOI: 10.1021/acsami.9b18995] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Invisible photonic crystal (PC) pattern with encrypted and discoverable information is potentially useful for anti-counterfeiting labels, but it is still a big challenge to realize strict invisibility, fast response, and convenient triggering. Here, a new kind of soaking-revealed invisible PC pattern is fabricated by the regional coating of "ethylene glycol-ethanol" ink on a collapsed inverse opaline macroporous polyurethane (IOM-PU) film, followed by a quick thermal treatment. During the above process, wet heating retains the collapsed but recoverable IOM structure, but dry heating disables the recovery of ordered IOM structure due to the adhesion of macropore walls, which render the "pattern" and the "background" with different optical responses to the solvent. In the dry state, the pattern was invisible because both the collapsed IOM-PU film and the adhesive PU film are colorless and transparent. Once the sample is soaked in ethanol-water mixtures, the invisible pattern appears immediately because only the "wet-heated" region recovers the ordered macroporous structure and shows color, which forms a significant contrast in color to the "dry-heated" region. Compared to the previously invisible PC pattern, the current material has many superior properties, such as high invisibility, large color contrast in showing, excellent recyclability, and good toughness in bending and stretching.
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Affiliation(s)
- Ke Chen
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes , East China Normal University , Shanghai 200062 , China
| | - Yixin Zhang
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes , East China Normal University , Shanghai 200062 , China
| | - Jianping Ge
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes , East China Normal University , Shanghai 200062 , China
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Kim DY, Kim MJ, Sung G, Sun JY. Stretchable and reflective displays: materials, technologies and strategies. NANO CONVERGENCE 2019; 6:21. [PMID: 31218437 PMCID: PMC6584625 DOI: 10.1186/s40580-019-0190-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 06/05/2019] [Indexed: 05/17/2023]
Abstract
Displays play a significant role in delivering information and providing visual data across all media platforms. Among displays, the prominence of reflective displays is increasing, in the form of E-paper, which has features distinct from emissive displays. These unique features include high visibility under daylight conditions, reduced eye strain and low power consumption, which make them highly effective for outdoor use. Furthermore, such characteristics enable reflective displays to achieve high synergy in combination with wearable devices, which are frequently used for outdoor activities. However, as wearable devices must stretch to conform to the dynamic surfaces of the human body, the issue of how to fabricate stretchable reflective displays should be tackled prior to merging them with wearable devices. In this paper, we discuss stretchable and reflective displays. In particular, we focus on reflective displays that can be divided into two types, passive and active, according to their responses to stretching. Passive displays, which consist of dyes or pigments, exhibit consistent colors under stretching, while active displays, which are based on mechanochromic materials, change their color under the same conditions. We will provide a comprehensive overview of the materials and technologies for each display type, and present strategies for stretchable and reflective displays.
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Affiliation(s)
- Do Yoon Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea
| | - Mi-Ji Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea
| | - Gimin Sung
- Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea.
- Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 151-744, South Korea.
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