Article
Polymer Science
Xian Li, Yawen Huang, Xu Ye, Quan Long, Wen Yuan, Li Fan, Qiuxia Peng, Jiajun Ma, Junxiao Yang
Summary: Novel hyperbranched carbosilane oligomers (HCBOs) functionalized by benzocyclobutene (BCB) groups have been prepared in this study. These materials can be thermally cured to produce transparent HCBRs with low dielectric constant and high thermostability.
DESIGNED MONOMERS AND POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Fengping Liu, Qiang Fang, Jing Sun
Summary: Two biobased functional monomers derived from isoeugenol have been successfully prepared and converted into cross-linked polymers with good thermostability, hydrophobicity, and low-dielectric performance. These materials show potential for the application in high-frequency communication as dielectric materials.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Composites
Qing Hou, Zongxiang Wang, Jiahong Tian, Kai Sun, Licheng Ju, Runhua Fan
Summary: This work demonstrated the mechanism of negative permittivity response with low losses in the silver nanowires/polyvinylidene fluoride composites. The large aspect ratios of silver nanowires enabled a ultra-low percolation threshold and effectively decreased losses. The negative permittivity response was attributed to the transition from insulator to conductor and the plasma oscillation of free electrons. The observation of skin effect indicated a switch from hopping to metallic conduction. The epsilon-negative materials with lower losses have potential applications in communication devices.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Ceramics
Jun Zuo Shi, Tu Lai Sun, Fu Wei Zhou, Xiao Li Zhu, Lei Li, Xiang Ming Chen
Summary: Low-k dielectric materials were prepared by sintering ZSM-5 zeolite powder compacts. The structure evolved from ZSM-5 zeolite to SiO2-Al2O3 glass, and finally to SiO2-based cristobalite ceramics. The materials exhibited low dielectric constant, low dielectric loss, and small temperature coefficient of resonant frequency.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Polymer Science
Heng Zhang, Jing Sun, Qiang Fang
Summary: A fluorine-containing monomer derived from bio-based isoeugenol has been synthesized and can be used as a precursor for dielectric materials in the field of high-frequency communication. It exhibits good dielectric properties and thermostability.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Quan Long, Xia Li, Yawen Huang, Qiuxia Peng, Xian Li, Liangbo Zhu, Jiajun Ma, Xu Ye, Junxiao Yang
Summary: This paper investigates the effect of spacing groups on the physicochemical properties of hyperbranched polycarbosilane derived resins by synthesizing hyperbranched polycarbosilanes with reactive benzocyclobutene groups. It is found that phenyl groups can effectively decrease the dielectric constant of the resins while maintaining good film forming ability and thermostability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Agricultural Engineering
Hongmei Yuan, Jianfei Wu, Dong Wang, Liulian Huang, Lihui Chen, Shan Lin
Summary: Chitosan particles were used to reinforce bamboo-derived dissolving pulp-based films, forming a physically cross-linked network with high packing density. The compatibility between chitosan and bamboo pulp improved the tensile strength and crystallinity of the BP/CS composite films significantly.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Multidisciplinary
Hengzhou Liu, Naveen Agrawal, Arna Ganguly, Yifu Chen, Jungkuk Lee, Jiaqi Yu, Wenyu Huang, Mark Mba Wright, Michael J. Janik, Wenzhen Li
Summary: This article introduces a new method for hydrogen production through water electrolysis using renewable energy sources. By replacing the sluggish oxygen evolution reaction with an electrocatalytic oxidative dehydrogenation of aldehydes, industrial-level hydrogen production is achieved at lower voltages. The use of a porous CuAg catalyst further enhances the reaction kinetics and a simple reactor with a dialysis porous membrane is demonstrated as a cost-effective and energy-efficient process for hydrogen production.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Mingyuan Gao, Yuexin Liu, Xiaoyu Li, Ying Liu, Zixing Wang, Kefeng Cai
Summary: A NiCo-OH/NiCoOOH composite film with high C and mass loading was prepared, showing outstanding performance including ultra-high C, high rate capability, and excellent cycling stability, attributed to the low-crystalline feature of the nanosheets, the synergistic effect of the phases, and the conductive porous EGP. An aqueous asymmetric supercapacitor assembled with NiCo-OH/NiCoOOH and Fe2O3 on EGP exhibited the highest E of 3.8 mW center dot h center dot cm(-2) at a power density of 4 mW center dot cm(-2) and a maximum P of 107 mW center dot cm(-2) at an E of 2.7 mW center dot h center dot cm(-2).
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Yin Liang, Qiuyu Shang, Meili Li, Shuai Zhang, Xinfeng Liu, Qing Zhang
Summary: A solvent recrystallization strategy was proposed to reduce the number of pinholes in perovskite films, resulting in amplified spontaneous green emissions with a low threshold and high net modal gain. The reduced threshold is attributed to low propagation loss and suppressed Auger recombination, which are achieved by forming a pinhole-free surface and enlarging grain size.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Xingchen Ji, Yoshitomo Okawachi, Andres Gil-Molina, Mateus Corato-Zanarella, Samantha Roberts, Alexander L. Gaeta, Michal Lipson
Summary: The fabrication processes of silicon nitride (Si3N4) photonic devices used in foundries require low temperature deposition, which leads to high propagation losses. However, by reducing waveguide surface roughness, propagation loss as low as 0.42 dB cm(-1) can be achieved using foundry compatible processes. Postprocessing the devices using rapid thermal anneal (RTA) and furnace anneal further reduces the losses to 0.28 dB cm(-1) and 0.06 dB cm(-1), respectively. These low losses are comparable to conventional devices using high temperature LPCVD films and demonstrate the feasibility of scalable photonic systems based on foundries.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jialu Zhan, Wei Zhu, Yuansheng Liu, Mengjie Li, Jiwei Zhao, Hai Su, Jia Ding, Jie Sun, Yunhua Xu
Summary: In this study, a Zn-K hybrid ion battery design is proposed, using a high-quality Prussian blue cathode and a nonflammable Zn-K hybrid ion electrolyte. The electrochemical process is divided into two parts, with K+ insertion/extraction occurring at the cathode side and Zn2+ plating/stripping occurring at the anode side. The hybrid cells demonstrate high capacity, high voltage, and an ultra-long cycle life, promising a bright future for renewable energy storage applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Liuyue Zhong, Yanxin Hao, Junheng Zhang, Fang Wei, Tingcheng Li, Menghe Miao, Daohong Zhang
Summary: This study synthesized a ferulic acid-based hyperbranched epoxy resin (FEHBP) to produce closed-loop recyclable and catalyst-free epoxy vitrimers with improved mechanical performance. The incorporation of FEHBP enhanced the tensile strength and toughness of the epoxy vitrimers through an in situ reinforcing and toughening mechanism. The hydroxyls of FEHBP catalyzed the dynamic transesterification and accelerated the reprocessing of epoxy vitrimers.
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Review
Engineering, Chemical
Helmut Thissen, Richard A. Evans, Vincent Ball
Summary: In recent years, major advances in surface chemistry and surface functionalization have been made through the development of versatile methodologies inspired by living organisms. AMN is likely to open a wide avenue in surface functionalization for bio-applications.
