ACS Applied Optical Materials
·
2023
·
IF 0
Miao Kong,Ronghui Han,Xiaoyu Guo,Shufen Zhang,Yuang Zhang,Bingtao Tang
The structural color of photonic crystals has garnered considerable attention in the domains of coded information security and anticounterfeiting technology mechanisms. However, most alterations induced by structural color hinge on dynamic regulation triggered by external stimuli, limiting their utility in static settings. Herein, the polyvinylidene fluoride (PVDF) photonic films with a bilayer inverse opal structure are engineered to enable the display and concealment of coded messages contingent on the observer’s viewing angle. The inherent attributes of PVDF polymer confer upon photonic films high stability and flexibility, as confirmed through curling, friction, and tensile tests. Notably, the upper inverse opal structure layer serves as the background, while the bottom inverse opal structure layer functions as the pattern in these PVDF bilayer photonic films. Owing to angle dependence of the pattern layer and the shielding effect of the background layer, the pattern remains concealed at viewing angles above 45° and becomes visible at angles below 30°. These photonic films have been adapted for use in touch-tone numeric keypad protective patches by optimizing particle size and thickness parameters. According to these findings, the coded information security systems based on the angle dependence in highly ordered photonic crystal structures offer substantial promise for applications in static environments.
研究领域:
光学材料
·
信息安全
·
纳米技术
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Huateng Li,Guowei Zhao,Mengjing Zhu,Jia Guo,Changchun Wang
Photochromic materials are widely investigated due to their vivid color transformation for many real applications. In this work, a new kind of multiangle photochromic photonic crystal (PC) material with high robustness and long durability for smart phone decoration and anticounterfeiting features is fabricated. After thermal mixing of spiropyran powder and monodisperse core-interlayer-shell (CIS) particles, a large-area and high-quality photochromic PC film has been prepared by the self-designed bending-induced ordering technique (BIOT). The spiropyran powder can be well dispersed in the order-structured PC system, so the perfect synergistic combination of photochromism and angle-dependent structure colors can be achieved. The color-switching test for the as-prepared photochromic PC film proved its excellent reversibility and stability. Because of the excellent flexibility of the photo-cross-linked PC films, they can be designed and cut into various shapes with high robustness and long durability. Interestingly, a temperature-controlled photochromic effect was found in this photochromic PC system. Therefore, the as-prepared photochromic PC films can play a significant role in the fields of smart decoration and anticounterfeiting by their unique color switching effects under different stimuli. More importantly, our work verified the feasibility of this route to prepare a series of large-sized advanced smart PC devices by adding versatile functional materials.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 13
·5808-5821
·
IF 4.5
Wu Wei,Wang Yueming,Sun Jiyu
Color changing can immediately activate system of vision, which bring corresponding monitoring function without delay. Traditional color-changing sensor is not competent for the detection of large area, low-cost and easy preparing. Inspired by adaptive coloring strategies of beetle elytra, angle dependent and humidity responsive color-changing films are achieved with large area through convenient and low-cost technics of spin-coating and self-leveling. When observed at different angles, L 2B , L 2P and L 3G acquired with NPAM and HEMA-co-MMA layers can bring color-changing expect L 3P . And L 3G also conducts humidity responsive color-changing with stability from green to purple in variation from 46%rh to 84%rh and reversibly changing from purple to green while from high to low humidity, which ascribed to transformation between dehydration and hydration of NPAM layer with hydrophilic groups. To characterize the durability and stability in microscale, nano-indentation technology was used to reveal the nanomechanical properties of cross-link networks for NPAM and HEMA-co-MMA films. It was found out that the hydrophilic groups of networks can carry hydrogen bonds to enhance cross-link characteristic and low separation performance. This research provides insights into the simple and efficient technology for preparing functional material that displays potential applications in industrial, agricultural and military fields. Graphical Abstract
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Luyao Wei,Guizhen Lin,Jie Liu,Ning Lv,Wei Jiang,Chaohong Dong,Shenglong Shang
Textile dyeing based on structural colors has attracted great attention due to its environmental friendliness and long-lasting color fastness. However, most studies on structural colored fabrics focus on only improving the color and stability of the fabric, neglecting the increasing demand for multifunctional textiles in daily life. Herein, a simple and effective method was used for preparing conductive structural colored cotton fabrics with nonangle-dependent colors and dynamic thermal management. To prepare structural color nanospheres with higher color rendering, PMMA nanospheres were coated with black PDA. The conductive structural colored fabric was obtained by self-assembling PMMA@PDA nanospheres onto MXene-modified cotton fabric through a simple blade coating method. The prepared conductive structural colored textile retains its softness and demonstrates good electrothermal performance and durable color fastness through washing, friction, and durability tests. This work provides a novel approach for creating bifunctional structural colored textiles that are suitable for electrothermal applications.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Congcong Chi,Danjie Zhang,Xin Xu,Jiahao Li,Jiangxue Ren,Xinggen Xu,Jiarong Xian,Honglei Chen,Hasan Jameel
More and more attention has been attracted by the structural color recently, which is attributed to its superiority of being eco-friendly and excellent color fastness. As a type of structural color material, the construction of photonic crystals (PCs) has become mature. However, there are still some problems that limit its applicability, such as the low color saturation and complicated process. Herein, a multi-step dropwise addition of precursor is adopted to achieve controllable preparation of monodispersed nano-silica and quick-dry SiO 2 PCs with heterochromatic characteristics from different angles are constructed. Inspired by the wing scales of Parides Sesostris butterfly, static deposition and layering method is proposed to fabricate SiO 2 PCs with biomimetic structure. The SiO 2 suspension is left standing for 72 hours to remove the supernatant, then self-assembly of the SiO 2 sediment is carried out. It can be found that the SiO 2 PCs assembled at the dish bottom are brightly colored with angle-dependence while the SiO 2 PCs assembled on the dish wall are liquid-responsive with good reversibility and recyclability. Therefore, a simple and rapid method for the preparation of angle-dependent and liquid-responsive SiO 2 PCs is provided. This will broaden applications of PCs in anti-counterfeiting, holographic displaying, information encryption, liquid/optical sensing, et al.
研究领域:
材料科学
·
光学工程
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Xin Zhang,Fuchang Yu,Chonglin Xu,Dan Tang
Photonic crystal structural colored fabrics have received significant interest in fabric coloring for their high brightness, high color saturation, anti-photo blenching, and iridescent properties. Further endowing structural colored fabrics with hydrophobic property can effectively boosts their practicality and meet the requirements of color stability in fabrics. However, introducing low surface energy substances directly into the interparticle voids will diminish the color saturation, while directly using hydrophobic particles for assembly might alter the surface charges and impede orderly assembly. These two issues constrain the practical utilization of structural colored materials. Herein, a simple yet efficient approach to create structural colored fabrics with angle-dependent color and hydrophobicity by using carefully modified hydrophobic SiO 2 colloid particles (h-SiO 2 CPs) as buiding blocks is introduced in this paper. In order to achieve SiO 2 CPs with both hydrophobicity and assemblability, the hydrophilic SiO 2 CPs were controllably modified with silane. The corresponding hydrophobic colored fabric was obtained by directly immersing the pure fabric in ethanol dispersion of h-SiO 2 CPs with desired mass fractions, then dried at ambient temperature. Compared with the structural colored fabric assembled with traditional hydrophilic SiO 2 CPs, fabrics prepared by this method exhibit not only bright iridescent structural color but also hydrophobicity. Additionally, by simply adjusting the particle size of h-SiO 2 CPs, hydrophobic fabrics with various colors can be prepared. This work offers a cost-effective and practical preparation method for preparing hydrophobic structural colored fabrics with vivid structural colors.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 8
·2101973
·
IF 10.05
Yan Zhao,Shuo-Hui Cao,Jia-Dai Wang,Na Li,Guo-Chun Lin,Yao-Qun Li
Probing light−matter interactions at the nanoscale is essential for elucidation of their fundamentals and construction of novel nano-optical devices. In this work, it is proposed that polarization- and angle-dependent plasmonic synchronous fluorescence spectroscopy could be powerful to resolve UV–vis plasmon mediated molecular couplings, even under vibrational sublevels. Taking studies of polycyclic aromatic hydrocarbons (PAHs, one general class of graphene analogs with emission range of 350–550 nm) as demonstration, a simple but efficient device of PAHs nanolayer (with thickness in tens to hundreds of nanometers) on an Al nano-film is fabricated. By synchronously scanning excitation and emission wavelengths in a high resolution to depict polarization- and angle-dependent spectrographic profiles, the vibrational transitions coupled to the Al plasmons could be identified, while these could not be attained by conventional fluorescence measurement. As a result, the featured molecular vibrational couplings for both surface plasmon- and plasmonic waveguide-mediated PAHs–Al interactions have been successfully observed at room temperature. Even toward crowded and overlapped spectral components containing multiple vibrations, the transitions could be individually distinguished. These efforts will contribute to the further exploitation and construction of efficient light-emitting devices via luminant molecules on a metal surface.
研究领域:
光学
·
纳米科技
·
材料科学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Zhuanggang Yang,Gaowen Chen,Yiyan Huang,Qianmin Liang,Huifang Shen
In recent years, structural colored coatings have become a hot spot for research because of the advantages of colorfast and eco-friendly. Nevertheless, it is still a great challenge to balance the conflict among color, luminosity, saturation and angle dependence of the coatings. In this work, we used electrophoretic deposition (EPD) technique with variable voltage assembly to deposit polydopamine coated polystyrene nanoparticles ( [email protected] NPs) with poly (dimethyldiallylammonium chloride) (PDDA). By varying the voltage of the EPD duration, structural colored coatings with hierarchical structure were prepared, which exhibited bright colors with low angle dependence. More importantly, the films could be coated on curved surfaces and other complicated shapes, which would have many practical applications in the future.
研究领域:
材料科学
·
纳米技术
·
涂层技术
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Changxing,Ning Yayun,Yue Yifan,Du Guoli,Xie Yuechi,Li Jianing,Bibi Nazia,Wen Xiaoxiang,Li Jianing,Yang Sen,Lu Xuegang
Developing room-temperature phosphorescent (RTP) materials with microscale periodic structures presents a promising prospect for future optical applications but remains challenging due to the complex integration of luminescent and structural components. Herein, we present a strategy for large-scale production of RTP silica nanospheres (RTP SiO 2 NPs) with a low dispersity in size using a modified Stöber method, where organic molecules are embedded in silica networks and subsequently undergo in-situ carbonization, aggregation and crystallization to form phosphorescent carbon dots under high-temperature calcination. These NPs can self-assemble into photonic crystal (PC) structures, enabling the straightforward integration of structural color, fluorescence (FL) and RTP to achieve multimodal luminescent properties. The angle-dependent photonic bandgap (PBG) generated by the physical periodic structure modulates light propagation in RTP PC gels, creating FL and RTP angle-dependent chromatic responses. Temperature-induced refractive index changes between SiO 2 and the liquid matrix further enable dynamic control of light-scattering states, significantly altering transmittance and emission intensities of FL and RTP. This fusion of physical photonic structures with luminescence offers potential approach for constructing advanced multimodal luminescent devices.
研究领域:
材料科学
·
纳米技术
·
光学
·
光子材料
·
发光材料
·
化学合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 11
·5345-5359
·
IF 6.7
Pengpeng Li,Biao Zhao,Kai Pan,Jianping Deng
Chiroptical nanomaterials including chiralized advanced functional nanofibers have attracted ever-increasing interest in multi-disciplinary fields. Nowadays, electronic circular dichroism (CD) is the most widely used technique to evaluate chiral properties. Numerous studies have shown that the occurrence of linear dichroism and linear birefringence (LDLB) phenomenon in chiral micro-/nano-architectures makes it challenging to distinguish their inherent chiral information. However, tactfully combining LDLB with true circular dichroism (true CD) may lead to a new class of chiroptical materials. In this study, we demonstrate that transparent nanofibrous films infiltrated with poor solvents can show unique LDLB properties, which allows achiral nanofibrous films to exhibit these features regularly opposite Cotton signals by simply flipping the two faces of the same film or even rotating the testing angles of the sample around its optical axis in a single face. More importantly, we can quantitatively distinguish the contribution of LDLB from true CD in the chiral composite nanofibrous system and even effectively combine them into a single unity. This kind of adjustable flexible film material shows outstanding value in the field of optoelectronics. Its large intrinsic LDLB feature and angle-dependent, non-reciprocal transmission for polarized lights are exploited to fabricate programmable polarized light-emitting devices through the resin encapsulation process. This study may provide an easy and powerful way for the construction and implementation of novel polarization optical materials towards future intelligent optical encryption and advanced anti-counterfeiting devices.
研究领域:
纳米技术
·
光学
·
材料科学
·
光子学
·
化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Shuai Li,Pengchao Li,Linlin Wang,Lixia Jia
Structural colors with low angle dependence arising from photonic crystals are of increasing interest in various fields, such as sensing and display. In this study, the composite Poly(styrene-methyl methacrylate-acrylic acid) photonic crystals consisting of amorphous , simple cubic and face-centered cubic structures were facilely constructed by vacuum-assisted filtration self-assembly. Interestingly, this method enables microspheres to be assembled on flexible fabrics in a "bottom-up" manner, and different types of structural color sheets (single-sided coloring, double-sided homochromy or heterochromatic) can be obtained by controlling the dosage and particle size of the microspheres. In particular, the prepared structural color sheets are exceptionally bright and have low angle dependence. Subsequently, the photonic crystals in the flexible fabric were reinforced by the introduction of Poly(methyl methacrylate-butyl acrylate), which resulted in a significant improvement in the mechanical stability, the performance of which was demonstrated by water-rinsing, friction and folding tests. This study provides a novel way to prepare new structural color materials with bright and low angle dependence. In addition, this double-sided heterochromatic structural color sheet has potential applications in the display field.
研究领域:
材料科学
·
光学
·
纳米技术
·
纺织工程
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 11
·2300347
·
IF 15.1
Yi Pan,Chang Li,Xiaoyu Hou,Zhenyu Yang,Mingzhu Li,Ho Cheung Shum
Stimuli-responsive structural coloration allows the color change of soft substrates in response to environmental stimuli such as heat, humidity, and solvents. Such color-changing systems enable smart soft devices, such as the camouflageable skin of soft robots or chromatic sensors in wearable devices. However, individually and independently programmable stimuli-responsive color pixels remain significant challenges among the existing color-changing soft materials and devices, which are crucial for dynamic display. Inspired by the dual-color concavities on butterfly wings, a morphable concavity array to pixelate the structural color of two-dimensional photonic crystal elastomer and achieve individually and independently addressable stimuli-responsive color pixels is designed. The morphable concavity can convert its surface between concave and flat upon changes in the solvent and temperature, accompanied by angle-dependent color-shifting. Through multichannel microfluidics, the color of each concavity can be controllably switched. Based on the system, the dynamic display by forming reversibly editable letters and patterns for anti-counterfeiting and encryption are demonstrated. It is believed that the strategy of pixelating optical properties through locally altering surface topography can inspire the design of new transformable optical devices, such as artificial compound eyes or crystalline lenses for biomimetic and robotic applications.
研究领域:
材料科学
·
光学
·
机器人学
·
仿生学
·
纳米技术
·
软物质物理
·
显示技术
·
防伪技术
·
密码学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）