ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 16
·2300389
·
IF 3.6
Xiaochang Xing,Lingling Wu,Xiaoyong Tian,Dichen Li
Objects can be identified based on their distinctive scattering signatures in multiple physical areas such as optics, electromagnetics, and thermotics. To ensure comprehensive stealth and camouflage capabilities, antisense devices with multiphysical field coupling are highly desired. Herein, a multifunctional antisense metadevice that achieves stealth in the microwave band while also generating multiple camouflage images from the original object's position during the heat conduction process is proposed and demonstrated. The metadevice combines both antimicrowave detection and camouflage infrared imaging capabilities, resulting in broadband electromagnetic stealth and thermal camouflage effect. Experimental and simulation results confirm the metadevice's ability to achieve these multifunctional capabilities in temperature-dependent cases. The development of such multifunctional devices that span physical fields provides new avenues for the design and preparation of multifunctional structures.
研究领域:
电磁学
·
热传导
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
X. Zhou,M.-H. Zhao,J. Yang,Y. Han,L. Cao,Y.-Y. Han,J. Wang,Y. Wang,M.-R. Li
Environment-friendly and cost-effective versatile yellow-green inorganic pigments are technically significant for natural camouflage but rare. Here, we adopt site-selective parent-doping of Mn–Li into the octahedral Ca-site (Ca B ) of Ca 3 TeO 6 to deliver vivid greenish pigments by the unprecedented yellow-green Mn 4+ O 6 chromophore, yielding tunable pigments resemble to seasonal leaves. The camouflage color zone of these pigments are remarkably enlarged by chemical pressure via Mg 2+ /Sr 2+ -substitution for the A -site Ca (Ca A ). The locally anisotropic and positive chemical pressure on chromophore group is scaled to be around +14.4/+23.3 GPa, as estimated from the accompanied geometric evolution of Mn 4+ O 6 . The achieved pigments also demonstrate excellent chemical and thermodynamic stability and high (60–80%) near infrared reflectivity in 1500–2500 nm, showing potential applications for natural camouflage and yellow-green “cool pigments”. These findings built a bridge between chemical and equivalently physical pressure, and nominated a way to estimate the overall and local strain/pressure by optical descriptor.
研究领域:
无机化学
·
材料科学
·
光学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jia-Yue Zhang,Tian-Run Lv,Yi-Han Xue,Wen-Hai Zhang,Ming-Jie Yin,Quan-Fu An
Hydrogel-based physical dual-encryption typically relies on the reversible shape-deformation of polymer chains for the decryption. However, the stored information is confronted by indecipherability at the microscale because the intrinsic relaxation of polymer chains would disrupt the fidelity of encoded information. Inspired by female Doryteuthis opalescens squid’s camouflage strategy (i.e. , switching a stripe on its mantle from nearly transparent to opaque white), we devised a reversible transmittance-changeable hydrogel layer to fully cover the mono-encrypted information layer for dual-encryption. The micro-structured hydrogel was manufactured via 3D printing to encode the information, which can be decoded by UV-induced fluorescent emission. Then, the white camouflage hydrogel was constructed to conceal the mono-encrypted layer, which will not affect the information encoding layer during the reversible polymer chain mobility. The information can be decoded with alkaline solution and UV irradiation in a rapid speed, i.e. , in 4 min, with good reusability. Moreover, the information was accurately unveiled even at microscale resolution, holding great promise for high-level encryption at the device level.
研究领域:
材料科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dong-Xue Xia,Xin Wang,Wen-Qi Sun,Rui-Lian Lin,Jing-Xin Liu,Ying-Wei Yang
Inspired by Chameleons' skin color tuning in response to environmental changes, we design and prepare three inclusion complexes based on the cucurbit[7]uril (Q[7]) host and three viologen guests. Upon light irradiation, the colors of these inclusion complexes in the solid state turn from light colors to vivid three primary colors, i.e., red, green, and blue, respectively. Ultraviolet–visible (UV–vis) diffuse reflectance and electron spin resonance (ESR) spectra reveal that the photochromism can be attributed to the generation of viologen radicals, originating from the photoinduced electron transfer. The results of quantum chemical calculation indicate that Q[7] in the inclusion complexes acts as the electron donor in the photoinduced electron transfer process. Using a color mixing approach and finely manipulating the proportions of the three inclusion complexes, a series of composite photochromic materials (CPMs) can be manufactured, covering a full-color gamut in visible light. On the other hand, due to the ignorable size and shape change of CPMs during the photochromatic processes, the CPMs-based reversible photochromic “printing” and photofading “erase” properties were also used for quick response (QR) code. Therefore, these prominent intelligent features of CPMs open new avenues to explore optical regulated nano-platforms for multiple anti-counterfeiting, biomimetics, and military camouflage applications.
研究领域:
材料科学
·
化学
·
仿生学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Tao Liang,Gang Peng,Xiangzhe Zhang,Yuehua Wei,Xiaoming Zheng,Wei Luo,Mengyan Dai,Chuyun Deng,Xueao Zhang
Two-dimensional materials with optical turnability have wide prospect in related applications such as electrochromic coating and thermal camouflage. Here we report a Li-intercalated ultrathin graphite device with tunable visible-near-infrared reflectivity . After Li-ion intercalation, the Fermi surface of ultrathin graphite will move to a higher level, which prevents the interband optical transitions below it. Therefore, it is possible to change the absorptivity or emissivity of ultrathin graphite through reversible Li-ion intercalation, which accomplishes the modification to reflectivity indirectly. In our experiment, the strong fluorescence background and Peak shifts in Raman spectra , as well as the enlarged layer spacing in XRD spectra, together confirmed that Li-ions were successfully intercalated into the graphite layers. The relative reflectivity of ultrathin graphite increased sharply in a wide range from 460 nm to 1500 nm after complete Li-ion intercalation. At a typical near-infrared wavelength 1500 nm for instance, the relative reflectivity is 0.28 for pristine graphite while 0.70 for fully lithiated graphite. Such reversible intercalated modulation in visible-near-infrared reflectivity of ultrathin graphite might provide a new way to design electrochromic coating, thermal camouflage or radar stealth systems, which also promotes further understanding and optical applications of graphene and other 2D materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Mengxin Liu,Haoran Zhang,Xinmeng Huang,Ziyi Zhang,Kunlai Zhang,Zhenwu Chen,Jintang Zhou,Lei Pan
It is crucial to develop electromagnetic interference (EMI) shielding materials with high shielding efficiency (SE) and reduced reflection to mitigate the secondary pollution caused by electromagnetic waves (EMWs). Herein, a novel multilayer assembly strategy inspired by the structure of “Turkish dessert—Baklava” is proposed to introduce magnetic hollow Fe 3 O 4 nanospheres (HFO) and conductive MXene nanosheets into a bacterial cellulose (BC) network. Through a layer-by-layer vacuum filtration approach, a composite BC/MXene/HFO film with a controllable electric-magnetic dual-gradient structure is achieved. The construction of electric-magnetic dual gradients alleviates the impedance mismatch at the air-film interface, resulting in reduced reflectivity toward EMWs, while the unique hollow structure of HFO facilitates the “absorption–reflection–reabsorption” process of EMWs. Consequently, the as-prepared composite film (0.35 mm thickness) exhibits an extraordinary EMI SE of 67.6 dB and a reflection SE as low as 5.1 dB. Furthermore, it also demonstrates exceptional mechanical properties, efficient thermal management, and Joule heating capabilities, as well as remarkable passive and active infrared camouflage performances. This study offers an innovative approach to achieve less reflection and more absorption of EMWs, and expands the application scope of EMI shielding materials in precision electronics, aerospace, and military equipment fields.
研究领域:
材料科学
·
电子工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bo Xu,Guoxiang Pan,Xinyu Fan,Haijie Zhou,Chengcong Qiu,Yuhua Guo,Minhong Xu,Jingwei Sun,Xinhui Xia
Conventional jungle-camouflage materials exhibit four prominent vibration peaks (green peak, red-edge, plateau, and water absorption peaks) on the green-vegetation spectrum. However, they cannot accurately simulate the water peaks of green vegetation, and this limits their application efficiency and considerably hinders their further development. Here, an environment-friendly camouflage coating comprising MgAlFe-LDHs-CA, ZnAl-LDH-AG, and BiVO 4 is proposed to facilitate the precise simulation of NIR spectrum of green-vegetation. Next, the developed material is characterized by XRD, FT-IR, TG-DTA, SEM and XPS techniques. The characterization results reveal that the newly developed jungle-camouflage-coating material achieves a 97.56 % simulation of green vegetation. Additionally, the similarity analysis results of the prepared camouflage coating confirm that it simulated all the spectral characteristics of green vegetation. Thus, we propose a new environment-friendly hydrotalcites camouflage material, thereby offering a new research direction in the development of camouflage materials.
研究领域:
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 18
·2500683
·
IF 12.1
Xuezhong Zhang,Yanhong Yang,Cheng Zhong,Dong Xiang,Haoming Sun,Dong Li,Guilong Yan,Yuanpeng Wu
With the development of electronic equipment and the advancement of environmental camouflage technology, higher requirements are placed on the flexibility, thermal conductivity, and heat storage capacity of phase change films. This work fabricated a high-performance dual-encapsulation composite phase change film through the employment of Pickering emulsion polymerization and sol-gel techniques, incorporating n-octadecane (n-OD), liquid metal gallium (Ga), and poly(p-phenylene benzobisoxazole) (PBO). Phase change microcapsules (PM) serve to prevent leakage during phase changes, maintain high levels of enthalpy, and enhance the dispersion of n-OD in matrices, as well as improve adhesion at interfaces. It is possible to achieve excellent thermal conductivity with only a small amount of modified Ga (MGa) by chitosan quaternary ammonium salt in the confined network since the material has a smaller size and a more uniform distribution. Owing to its distinctive structural design and modification strategy, the composite phase change film (MGa/PM/PBO) manifests outstanding mechanical properties (featuring a tensile strength of 7.0 MPa), remarkable thermal conductivity (9.4752 W m −1 K −1 ) in-plane), and excellent heat storage capacity (100.9 J g −1 ). It harbors significant potential for application in the thermal management of electronic devices and in environmental camouflage.
研究领域:
材料科学
·
热物理学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 5
·1-9
·
IF 23.2
Shen Yong,Li Guojie,Cheng Yajie,Li Yahong,Alhadhrami A.,Fallatah Ahmed M.,Alshammari Dalal A.,Zhou Bing,Feng Yuezhan,Liu Chuntai
Developing a multifunctional protection material compatible with infrared (IR) stealth and electromagnetic interference (EMI) shielding is urgently required but challenging to ensure special human safety and maintain the smooth operation of electronic equipment. Herein, it is designed and fabricated a double-layered ANF/MXene film containing a thermally insulated aramid nanofiber (ANF) aerogel and low emissivity MXene coating with integrated long-term thermal camouflage at elevated temperatures and highly efficient EMI shielding capability. In this system, the lower aerogel film can act as a barrier to insulate heat transfer through its novel skin–core structure under ultralow directional thermal conduction, while the upper Ti 3 C 2 T x MXene coating can provide a very low emissivity surface and highly conductive network. Owing to its unique double-layer structure, the ANF/MXene film demonstrates a significant EMI shielding effectiveness of 43.6 dB and a remarkably low emissivity of 0.24, delivering excellent IR stealth performance across various ambient temperatures. This research lays the foundation for the creation of versatile protective materials that have great potential for use in both military and civilian contexts.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dong Wang,Jingfang Li,Xiaohui Sun,Jianghua Hu,Xueqiang Tan,Qi Jia,Jun Liu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
Electric field responsive photonic crystals take on critical significance in developing adaptive camouflage technology, which are promising materials for adaptive camouflage devices with better fabrication processes and color saturation. However, electric field responsive photonic crystals are primarily susceptible to poor fusion with typical background colors and necessitate the continuous implementation of electric fields to attain specific colors, thus limiting their practical applications. Monodisperse polyvinylpyrrolidone modified cadmium sulfide (PVP/CdS) microspheres with large refractive index are well prepared in this study. Liquid photonic crystals, exhibiting earth-yellow and light green under specific electric field, are obtained with PVP/CdS particles dispersed in propylene carbonate in accordance with the subtractive color mixing principle of structural color and initial color. The resulting electric field responsive photonic crystals are characterized by a simple preparation process, fast electrical response, long-time holding of the earth-yellow state, and reversible color changes between earth-yellow and light green in −3.5 V and + 3.5 V electric field switching. This study can contribute to the development of color-changing devices designed for adaptive camouflage applications.
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
Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 17
·e202400529
·
IF 3.5
Ying Zhang,Yujing Ren,Jingyan Hao,Juan Gao,Yurong Ma
Hyperspectral imaging technology can record the spatial and spectral information of the targets and significantly enhance the levels of military reconnaissance and target detection. It has scientific importance to mimic “homochromatic and homospectral” camouflage materials that have hyperspectral similarity with the green vegetation, one of the most common natural backgrounds. It is a big challenge to exquisitely simulate the spectral of green vegetation in visible and near-infrared windows because of the slight differences between the artificial green dyes and vegetation, the instability of chlorophylls, and the easy loss of hydroxide bands due to the loss of water from the camouflage materials. Herein, a novel kind of biomimetic material of green vegetation was designed through the incorporation of chlorophylls into the crystal lattices of single-crystalline anhydrous guanine microplates for the first time. The synthesized chlorophylls-doped anhydrous guanine crystals exhibit high reflectance intensity and depolarization effect, thus can be applied as biomimetic camouflage materials that mimic green vegetation with high reflectivity and low polarization in the visible and near-infrared regions. The factors influencing the formation of dye-doped organic crystals under mild conditions were thoroughly investigated and the characterizations using electron microscopies and fluorescence confocal laser scanning microscopy clearly confirm the occlusion of chlorophylls into the crystal lattices of guanine crystals. The thermal stability experiments clearly indicate that the chlorophylls-doped guanine crystals possess long-term stability at high temperature. This study provides a new strategy for the synthesis of multifunctional materials comprised of organic crystals.
研究领域:
材料科学
·
仿生学
·
光谱学
✓ 已验证
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Hongfeng Yu,Junru Yao,Jinlong Lv,Ruirui Zhang,Zi Wang,Xiangjia Song,Xiangfei Wei,Jintang Zhou
Developing lightweight, high-performance microwave absorbing materials with multiple functions has become a major challenge in the field of electromagnetic protection. In this study, ZIF-67/cellulose nanofiber (CNF)-derived Co–C/C aerogel with an integrated design for microwave absorption and thermal camouflage functions was prepared. The hierarchical pore structure with coexisting micron-scale skeletal pores and MOF-derived nanopores was constructed through in-situ growth of ZIF-67 on CNF and low-temperature carbonization regulation. Simultaneously, uniformly distributed Co nanoparticles (20–30 nm) and defect-rich graphitized carbon heterointerfaces were obtained. The Co–C/C aerogel exhibited an ultra-low density (16.21–17.35 mg/cm 3 ). In terms of microwave absorption, it achieved an effective absorption bandwidth of 6.87 GHz (covering the Ku band) at a thickness of 2.4 mm. This was attributed to the synergistic mechanisms of multiple scattering from hierarchical pores, enhanced interfacial polarization induced by low-temperature carbonization, and magnetic loss from Co nanoparticles. In addition, the material demonstrated a low thermal conductivity of 0.0492 W m −1 K −1 , and infrared imaging revealed its significant thermal signal shielding capability. This study addressed the issues of structural collapse and functional singleness in traditional MOF-derived materials through in-situ growth and low-temperature carbonization strategies, providing new insights for the design of lightweight, broadband, and multifunctional stealth materials.
研究领域:
材料科学
·
电磁学
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）