Article
Chemistry, Multidisciplinary
Yunyi Yang, Yinan Zhang, Jie Zhang, Xiaorui Zheng, Zhixing Gan, Han Lin, Minghui Hong, Baohua Jia
Summary: Silicon photovoltaic devices offer potential solutions for global energy and environmental challenges. By modifying the Si interface with two-dimensional materials, recent advancements have significantly improved device performance. In this study, a 3D conformal coating of graphene metamaterials is proposed to reduce optical reflection and improve surface passivation. Applying this coating to standard Si solar cells resulted in a 23% increase in solar energy conversion efficiency. This strategy can be extended to other optoelectronic and semiconductor device systems, offering a pathway for efficient energy harvesting and storage solutions.
Article
Engineering, Mechanical
Xing Chi Teng, Xin Ren, Yi Zhang, Wei Jiang, Yang Pan, Xue Gang Zhang, Xiang Yu Zhang, Yi Min Xie
Summary: A simple 3D re-entrant unit cell is designed in this study, and the influence of geometric parameters on the performance of the structure is investigated numerically. Experimental results show that the proposed 3D re-entrant auxetic metamaterial exhibits stable compression deformation and desirable energy absorption behavior, which can be utilized for designing protective structures.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mechanics
Xi Hai Ni, Wei Jiang, Xue Gang Zhang, Dong Han, Xing Chi Teng, Jian Hao, Hang Hang Xu, Xin Ren
Summary: The novel auxetic honeycomb (NAH) combines an original re-entrant hexagonal honeycomb (RH) with cross-chiral honeycomb (CH) to overcome the limitations of unstable deformation and low stiffness. The static mechanical properties and deformation behavior of NAH are investigated experimentally and numerically, and the energy absorption and deformation behavior under different impact loadings are also studied. The results demonstrate that NAH has superior energy absorption and impact resistance compared to RH and CH.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Physical
Xuanchen Zhao, Jing Hu, Junhao Xie, Yan Liu, Shulin Sun
Summary: In this study, the introduction of MG copolymer improved the performance of PVDF by inducing crystal phase transformation, reducing crystal size and crystallinity, and decreasing dielectric losses. MG also enhanced breakdown strength and discharge energy density of PVDF. This research provides a new approach for the design of all-organic composite membranes and optimization of PVDF/MG dielectric membranes through regulation strategies.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Composites
Victor E. Ogbonna, Abimbola Patricia Popoola, Olawale M. Popoola, Samson O. Adeosun
Summary: This paper presents the mechanical behavior and electrical properties of novel composites consisting of ECR-glass reinforced polyimide loaded with TiO2 nanoparticles. The results show that the incorporation of TiO2 nanoparticles improves the hardness, stiffness, and elastic modulus of the composites, while reducing the dielectric constant, dielectric loss, and electrical conductivity.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
S. E. Rodriguez, E. P. Calius, A. Khatibi, A. Orifici, R. Das
Summary: Research in mechanical metamaterials has achieved extreme, unprecedented properties by exploiting inhomogeneity in the form of periodic structures, enabled by advances in digital computation and manufacturing. The emergence of non-periodic heterogeneous metamaterial systems represents the evolution of metamaterials towards more complex, machine-like functions. A functional classification and comparison approach based on deformation and force transformations is proposed to better understand the wide variety of species within mechanical metamaterials and metastructures.
EXTREME MECHANICS LETTERS
(2023)
Article
Materials Science, Composites
Zeyu Li, Zhonghui Shen, Xin Yang, Xiaoming Zhu, Yao Zhou, Lijie Dong, Chuanxi Xiong, Qing Wang
Summary: A newly designed sandwiched polymer nanocomposite was developed with enhanced charge-discharge efficiency and energy density at high electric fields, demonstrating the uniqueness of trilayered structure in incorporating multiple components for energy applications.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jun Li, Fan Yang, Yin Long, Yutao Dong, Yizhan Wang, Xudong Wang
Summary: A lamellar ferroelectric metamaterial with ceramic-like piezoelectric property and bone-like fracture toughness was created using a low-voltage-assisted 3D printing technology. This material exhibited enhanced piezoelectric charge coefficient and superior fracture resistance, showing potential for manufacturing practical, high-performance, and smart biological systems.
Article
Engineering, Civil
Hang Zhang, Pengwan Chen, Gaojian Lin, Weifu Sun
Summary: Mechanical metamaterials offer new options for energy absorption, and the design of corrugated wall mechanical metamaterials with adjustable lateral wall thickness can significantly alter the mechanical properties of the structure. Continuous and symmetric gradient design methods can improve the specific energy absorption of the structure.
THIN-WALLED STRUCTURES
(2022)
Article
Chemistry, Physical
S. O. Morgan, A. Muravitskaya, C. Lowe, A. M. Adawi, J-S G. Bouillard, T. S. Horozov, G. J. Stasiuk, D. M. A. Buzza
Summary: This paper introduces a novel method for assembling vertically aligned nanorod arrays using the adsorption kinetics of cylindrical nanorods at a liquid interface. The study finds that the final orientation of the nanorods is determined by their initial attack angle when contacting the liquid interface, and pre-aligning the nanorods with experimentally achievable electric fields can increase the proportion of nanorods in the end-on state to 100%. The resulting vertically aligned structures can be used as epsilon-near-zero and hyperbolic metamaterials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Dongyong Shan, Haiyue Wang, Ke Cao, Junhua Zhang
Summary: This paper proposes a frequency reconfigurable magnetic resonant coupling wireless power transfer system using a frequency reconfigurable metamaterial to enhance efficiency. The system achieves reconfigurability by adjusting the capacitance value, and simulation and measurement results demonstrate improved power transfer efficiency through manipulation of the electromagnetic field direction by the metamaterial.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Xuepeng Liu, Hui Tong, Jinpeng Luo, Jiafeng Zhu, Shimo Cao, Ju Xu, Yudong Hou
Summary: Dielectric properties of polymer-matrix composites can be effectively improved by modifying the interface between the organic and inorganic components. In this study, polymer composites derived from polystyrene (PS) and barium titanate (BTO) were modified with poly(styrene-co-maleic anhydride) (PS-co-mah) to enhance compatibility. The interfacial modification resulted in improved breakdown strength and reduced dielectric loss compared to pure PS and unmodified BTO/PS composites. The optimized BTO@PS-co-mah/PS composite with 5 wt% filler content showed a breakdown strength of 507 MV m(-1) and tan delta of 0.085%, indicating great potential for applications such as film capacitors.
Article
Chemistry, Physical
Shatrudhan Palsaniya, Soumyo Mukherji
Summary: In this study, high-density energy materials with hierarchical polyaniline functionalized polycrystalline hybrid units were designed to improve the dielectric properties and microwave absorbance. The results showed that the material had high charge polarization and excellent charge storage performance, as well as high energy density and low losses at low electric field strength, resulting in significant electromagnetic wave attenuation. This material has potential applications in energy storage and microwave absorption in solid-state devices.
Article
Materials Science, Composites
Weipeng Sun, Kexin Zhong, Yuanyuan Liu, Hanjie Xiao, Daoli Zhao, Zhimiao Yan, Ting Tan
Summary: This study demonstrates through mathematical analysis and experiments that selecting an appropriate thickness for the substrate of acoustic metamaterials can enhance the output power of acoustic energy harvesters. The findings of this research will contribute to the development of high-performance metamaterial-based acoustic energy harvesters.
COMPOSITES COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yu Zeng, Lu Tang, Zengnian Xin, Fangfang Guo, Guijin Li, Nan Chen, Guoping Du
Summary: This study fabricated composites of Ag-decorated Ti3C2Tx MXene and silicone rubber (SR) to improve the dielectric properties of polymer composites. The Ti3C2Tx MXene-Ag/SR composites showed higher dielectric constants and lower loss tangents compared to Ti3C2Tx MXene/SR composites. The composites also exhibited excellent mechanical properties. This work provides a method to obtain polymer-based composites with high dielectric and mechanical performances for various applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
