Article
Chemistry, Multidisciplinary
Hailong Liu, Hongtao Wang, Hao Wang, Jie Deng, Qifeng Ruan, Wang Zhang, Omar A. M. Abdelraouf, Norman Soo Seng Ang, Zhaogang Dong, Joel K. W. Yang, Hong Liu
Summary: In this study, a new strategy was devised to generate high-order photonic cavity modes upon side illumination on woodpile photonic crystals, enabling one-step printing of 3D photonic structural colors. The resulting colors are vivid, with a wide spectral range and large viewing angles, and do not require postprocessing or subwavelength features.
Article
Nanoscience & Nanotechnology
Yue Fu, Hu Zhao, Yunming Wang, Dan Chen, Zhaohan Yu, Jiaqi Zheng, Shuang Sun, Weihao Cai, Huamin Zhou
Summary: In this study, a new fabrication strategy was employed to achieve three-dimensional photonic crystal-light emitting (PC-LE) devices with dual iridescent and reversible photochromic colors. Additionally, inkless color printing was realized through the etching process, generating a reversible and encrypted colorful bar code. This research opens up new possibilities for advanced display, color printing, and anticounterfeiting stickers.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yi-Yang Zhan, Daisuke Ogawa, Koki Sano, Xiang Wang, Fumito Araoka, Nobuyuki Sakai, Takayoshi Sasaki, Yasuhiro Ishida
Summary: The article presents a reconfigurable photonic crystal that exhibits single-peak and double-peak structural colors and allows for reversible state transitions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Habeen Park, Young Gook Koh, Wonmok Lee
Summary: The study presents a smartphone-based colorimetric analysis method for an inverse opal photonic gel sensor, offering a simple, cost-effective, and rapid alternative to traditional UV-vis spectrometry. By using the HSV color space and the hue parameter, the smartphone analysis shows reasonable precision for pH determination under common illumination conditions, regardless of the smartphone brand used.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Anna B. Stephenson, Ming Xiao, Victoria Hwang, Liangliang Qu, Paul A. Odorisio, Michael Burke, Keith Task, Ted Deisenroth, Solomon Barkley, Rupa H. Darji, Vinothan N. Manoharan
Summary: Photonic balls are spheres that contain nanoparticles or nanopores, with a diameter comparable to the wavelength of light. They can exhibit structural color due to their disordered but correlated nanoscale features, making them a promising type of pigment for various applications. However, predicting the color of materials made from photonic balls is challenging due to the need to account for sphere geometry and multiple scattering. In this study, a multiscale modeling approach involving Monte Carlo simulations is developed to address these challenges.
Article
Chemistry, Multidisciplinary
Jing Zhang, Jingjing Zhang, Yangteng Ou, Yipeng Qin, Huilin Wen, Weiliang Dong, Rui Wang, Su Chen, Ziyi Yu
Summary: A photonic plasticine with uniform structural colors, high processability, and self-healing properties is demonstrated by synergizing colloidal photonics and dynamic chemistry. The material can be processed into 3D structural colored objects through common shaping methods and holds great potentials in fields such as bio-encoding, optical filters, anti-counterfeiting, etc.
Article
Materials Science, Multidisciplinary
Shuai Li, Lixia Jia, Pengfei Dong, Guohua Shan, Rui Liu
Summary: By using SiO2@PDA microspheres on white polyester fabric, bright, vivid, and angle-independent structural colors can be achieved. Different structural colors can be obtained by adjusting the size of the SiO2@PDA microspheres and viewing angle. SiO2@PDA microspheres can absorb incoherently scattered light, enabling the direct formation of structural colors on white fabric substrates.
Article
Chemistry, Applied
Hao Liu, Yunxiao Zhang, Mengting Jin, Wanbin Ma, Wenyu He, Yucheng Li, Chengcai Li, Lan Zhou, Jianzhong Shao, Guojin Liu
Summary: This paper proposes a method for structural coloration of carbon fiber by constructing photonic crystals and investigates the influence of colloidal microsphere mass fraction and substrate density on the structural colors. Structural color patterns are achieved on carbon fiber boards by spraying method, and the durability of structural colors is improved by encapsulation with polydimethylsiloxane.
Review
Materials Science, Multidisciplinary
Keming Zhu, Jing Song, Changqing Fang, Xing Zhou, Mengyuan Pu, Dong Wang
Summary: This review summarizes the functions, self-assembly modes, and applications of different kinds of photonic crystal materials. The preparation methods and characteristics of various types of nanoparticles and MOFs are discussed. The method of assembling colloidal particles into photonic crystals is summarized. The potential applications of structural color in sensors, anti-counterfeiting, fabric coloring, displays, and biomedical fields are presented, along with the development prospects and key problems of photonic crystals.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Zi-Li Wang, Qiang Wang, Xiu Dong, Dong Li, Lan Bai, Xiu-Li Wang, Yu-Zhong Wang, Fei Song
Summary: This study proposes a method for constructing vivid structural-color composite films using dopamine infiltration and post-polymerization. The composite films, which combine the structural coloration of cellulose nanocrystals (CNC) with the strong light absorption of polydopamine (PDA), can quantitatively and selectively detect organic solvents through visible color changes. The study also defines a three-dimensional Hansen solubility sphere to control the sensing selectivity.
Article
Chemistry, Multidisciplinary
Van Tan Tran, Jeonghyo Kim, Sangjin Oh, Ki-Jae Jeong, Jaebeom Lee
Summary: A magnetic field-induced assembly method is demonstrated for the rapid formation of photonic arrays with unique structural colors. This method breaks the trade-offs between color saturation and brightness and the angle-dependent effect, and offers high tunability and responsiveness.
Article
Engineering, Environmental
Amin Babaei-Ghazvini, Bishnu Acharya
Summary: Cellulose nanocrystals (CNCs) can exhibit structural colors and mechanical stress responsiveness, making them suitable for applications in biomedical engineering and wearable responsive sensor technologies. A one-step hydrogel fabrication method has been developed to create optically functional photonic hydrogels with these properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Wuke Wei, Chengcai Wu, Qianyao Fang, Zhongwen Zhao, Xin Su
Summary: Monodisperse CdS@SiO2 spheres were used as building blocks to fabricate photonic crystal balls through microfluidic process. The presence of SiO2 shells improved the chemical stability of CdS cores and allowed effective self-assembly into highly ordered photonic crystal balls. Thermal treatment transformed the photonic crystal balls into PC pigments with vivid and saturated size-dependent structural colors.。
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Chuan Wang, Xi Lin, Christian C. Schafer, Stefan Hirseman, Jianping Ge
Summary: A two-step spraying process followed by thermal curing has been developed to prepare waterproof PC coatings with bright, uniform, and angular-dependent structural colors. The coatings present colors with high saturation, including red/yellow/green/blue colors achieved by tuning the particle size, and many spectral/non-spectral colors via the mixing of base colors. The coatings offer a new choice for personalized automotive coatings with shiny colors changing with the viewing angles or the surface curvatures.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Applied
Peng Han, Xinyue Li, Bin Zhao, Yuan Li, Huiliang Li, Zheng Wang, Weihua Meng
Summary: Researchers have designed a hierarchical structural-colored film with highly ordered periodic layers and amorphous array layers, which shows excellent optical effects. The highly ordered periodic layers act as a specific wavelength mirror-like reflectance, enhancing the coherent scattering of light in the amorphous arrays and resulting in higher color visibility. The intricate interaction of light over hierarchical structures at different length scales has profound significance for the application of complex optical assemblies.
Article
Chemistry, Multidisciplinary
Young Geon Kim, Sanghyuk Park, Shin-Hyun Kim
Summary: By using colloidal crystals in the form of microspheres as building blocks, spherical microcapsules with density anisotropy were designed. These microcapsules spontaneously align under gravity and display a bright and uniform reflection color. The success of this alignment is due to the use of gentle centrifugal force to initiate nucleation and grow single-crystalline grains from the heavy side through depletion attraction.
Article
Chemistry, Physical
Shin-Hyun Kim, Jong Bin Kim, Seong Kyeong Nam, Sanghyuk Park, Esther Amstad
Summary: By assembling silica particles in emulsion droplets, we can create structural color coatings with high brightness, saturation, and angle dependence.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Anna B. Stephenson, Ming Xiao, Victoria Hwang, Liangliang Qu, Paul A. Odorisio, Michael Burke, Keith Task, Ted Deisenroth, Solomon Barkley, Rupa H. Darji, Vinothan N. Manoharan
Summary: Photonic balls are spheres that contain nanoparticles or nanopores, with a diameter comparable to the wavelength of light. They can exhibit structural color due to their disordered but correlated nanoscale features, making them a promising type of pigment for various applications. However, predicting the color of materials made from photonic balls is challenging due to the need to account for sphere geometry and multiple scattering. In this study, a multiscale modeling approach involving Monte Carlo simulations is developed to address these challenges.
Article
Chemistry, Multidisciplinary
Sehee Yang, Young Geon Kim, Sanghyuk Park, Shin-Hyun Kim
Summary: Researchers have developed photonic microcapsules with dual or triple stopbands, offering a wider range of colors and optical codes. By manipulating interparticle interactions, they were able to control the size and composition of crystalline grains in the microcapsules, resulting in controllable mixed structural colors and reflectance spectra.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Ji-Won Kim, Sang Hoon Han, Minhee Ku, Jaemoon Yang, Shin-Hyun Kim
Summary: Chemophotothermal therapy is a promising cancer treatment method that combines photothermal agents and drugs. However, low payload, burst release, and dilution have limited its effectiveness. To overcome these limitations, smart microcapsules were designed as a practical material for chemophotothermal therapy. Water-in-oil-in-water double-emulsion templates were produced to encapsulate photothermal nanoparticles and drugs. The microcapsules release drugs when the phase-change material (PCM) in the polymer shell melts, while retaining drugs without leakage when frozen. The concentrated nanoparticles provide rapid and intense heating, allowing for controlled drug release using near-infrared irradiation.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sihun Park, Sang Seok Lee, Sehee Yang, Shin-Hyun Kim
Summary: A design rule is reported for the asymmetric pairing of distinct droplets to provide bright color patterns through strong cross-communication and enrich a variety of optical codes. Cholesteric liquid crystal (CLC) droplets with different stopband positions and sizes are paired, and the brightness of corresponding color patterns is maximized when the pairs effectively guide light along the double reflection path by stopbands of two droplets. The effectiveness of pairing is quantitatively predicted by a geometric model, serving as a design rule for programming the asymmetric photonic cross-communication.
Article
Multidisciplinary Sciences
Yi Yang, Jong Bin Kim, Seong Kyeong Nam, Mengmeng Zhang, Jiangping Xu, Jintao Zhu, Shin-Hyun Kim
Summary: This article introduces a new type of structural color, crescent-shaped microparticles, which exhibit brilliant colors under directional light and are transparent under ambient light. By adjusting the size of the microparticles, the colors can be finely tuned. These nanostructure-free colorants can be used as invisible inks for anti-counterfeiting patches and color cosmetics, due to their low-cost, scalable manufacturing, unique optical properties, and versatility.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jong Hyun Kim, Wahyu Martumpal Hamonangan, Shin-Hyun Kim
Summary: This research designs elastic photonic shells with enhanced color saturation and high deformability using W/O/W double-emulsion templates. The shells contain acrylate-based resin with non-close-packed arrays of silica particles, which are improved in crystalline order by increasing the concentration of water-soluble molecules. The coloration of the shells can also be tuned through osmotic inflation in hypotonic conditions.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Xander M. De Wit, Amelia W. Paine, Caroline Martin, Aaron M. Goldfain, Rees F. Garmann, Vinothan N. Manoharan
Summary: Interferometric scattering microscopy combined with Bayesian framework and automatic differentiation technique presents a new method for analyzing interferometric images, enabling the determination of three-dimensional position, polarizability, uncertainties, and correlations of nanoscale systems, as well as inferring their static and dynamic properties.
Article
Chemistry, Physical
Clary Rodriguez-Cruz, Mehdi Molaei, Amruthesh Thirumalaiswamy, Klebert Feitosa, Vinothan N. Manoharan, Shankar Sivarajan, Daniel H. Reich, Robert A. Riggleman, John C. Crocker
Summary: A recent study showed that the random motions of the bubbles in a soft glassy material are due to the configuration of the system moving over a fractal energy landscape in high-dimensional space. The analysis of the observed trajectories of oil droplets in a dense emulsion reproduced the high-dimensional fractal geometry of the configuration path and confirmed the presence of fractal energy landscape dynamics. This discovery suggests that similar dynamics in different soft and biological materials may also be attributed to fractal landscape dynamics.
Article
Chemistry, Physical
Ji-Won Kim, Chao Chen, Hyunki Kim, Shin-Hyun Kim, Ryan C. Hayward
Summary: This study investigates the effect of surface tension on the light-induced wrinkling of hydrogel disks containing photothermally-active gold nanoparticles. By changing the surface tension through the concentration of a poly(vinyl alcohol) surfactant, a critical threshold for wrinkling is observed, followed by a decrease in wrinkle number with decreasing surface tension. Finite element simulations show similar trends as the experiments. The findings provide insights into controlling the interfacial behavior of reconfigurable and shape-morphing films.
Article
Chemistry, Multidisciplinary
Sehee Yang, Young Geon Kim, Sanghyuk Park, Shin-Hyun Kim
Summary: The researchers created photonic microcapsules with dual or triple stopbands, offering a wider range of colors through structural color mixing. They controlled the crystallization of colloidal mixtures using depletion forces and specific conditions, resulting in different particles and controlled ratios within the crystals.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ye Hun Choi, Jiwoo Lee, Esther Amstad, Shin-Hyun Kim
Summary: This study explores the variation of surface arrangements in icosahedral clusters composed of colloids and identifies the determining factors behind the surface arrangement. The experimental approach of droplet-to-droplet osmotic extraction is used to efficiently assemble particles in emulsion droplets. The findings reveal that the sphericity of the clusters plays a pivotal role in determining the number of layers in the anti-Mackay shells on the surface.
Article
Chemistry, Multidisciplinary
Sanghyuk Park, Shin-Hyun Kim
Summary: This study presents a simple and efficient method for producing photonic micropatterns through bottom-up depletion-mediated regioselective growth of colloidal crystals. The method allows high-resolution micropatterning and control over the structural colors through concentration, depletant and salt, as well as particle size. Additionally, secondary colors can be generated through structural color mixing. The findings offer a general approach for designing elaborate photonic micropatterns suitable for various applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hwan-Young Lee, Minbon Gu, Jeonghee Hwang, Hyerim Hwang, Young-Seok Kim, Su Yeon Lee, Shin-Hyun Kim
Summary: Auxetic photonic patterns are designed to provide ultra-sensitive mechanochromism. As the strains are locally amplified in the cut areas of the auxetic patterns, elastic photonic crystals in the cuts show significant color change even for small total strains. The sensitivity is as high as 60 nm/%, which is 20 times improved from bulk films, enabling intuitive colorimetric monitoring of strains.