Article
Chemistry, Multidisciplinary
Jing Xia, Na Zhang, Yijun Yang, Xing Chen, Xi Wang, Feng Pan, Jiannian Yao
Summary: Herein, an ingenious Li-deintercalation/doping strategy is developed to synthesize lanthanide-doped LiCoO2 with improved cycling stability. Experimental results show that the lattice strain tuned by lanthanide contraction plays a critical role in the structure stability of LiCoO2. Lu-doped LiCoO2 exhibits the best cycling stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Junhwan Choi, Chungryeol Lee, Juyeon Kang, Changhyeon Lee, Seung Min Lee, Jungyeop Oh, Sung-Yool Choi, Sung Gap Im
Summary: This paper presents a universal strategy to synthesize high-k hybrid dielectric materials by incorporating a high-k polymer layer on top of various inorganic layers generated by different fabrication methods. These hybrid dielectric materials have high capacitance and excellent insulating properties, and can achieve stable operation at ultralow voltages.
Article
Physics, Multidisciplinary
Takahiro Nishi, Kenta Itahashi, DeukSoon Ahn, Georg P. A. Berg, Masanori Dozono, Daijiro Etoh, Hiroyuki Fujioka, Naoki Fukuda, Nobuhisa Fukunishi, Hans Geissel, Emma Haettner, Tadashi S. Hashimoto, Ryugo Hayano, Satoru Hirenzaki, Hiroshi Horii, Natsumi Ikeno, Naoto Inabe, Masahiko Iwasaki, Daisuke Kameda, Keichi Kisamori, Yu Kiyokawa, Toshiyuki Kubo, Kensuke Kusaka, Masafumi Matsushita, Shin'ichiro Michimasa, Go Mishima, Hiroyuki Miya, Daichi Murai, Hideko Nagahiro, Megumi Niikura, Naoko Nose-Togawa, Shinsuke Ota, Naruhiko Sakamoto, Kimiko Sekiguchi, Yuta Shiokawa, Hiroshi Suzuki, Ken Suzuki, Motonobu Takaki, Hiroyuki K. Takeda, Yoshiki Tanaka, Tomohiro Uesaka, Yasumori Wada, Atomu N. Watanabe, Yuni Watanabe, Helmut Weick, Hiroki Yamakami, Yoshiyuki Yanagisawa, Koichi Yoshida
Summary: In quantum chromodynamics, the condensation of quark-antiquark pairs breaks the chiral symmetry of vacuum. Experiments with pionic tin atoms demonstrate that the symmetry is partially restored at high densities. Vacuum is not empty and is instead filled with quark-antiquark pairs, which form a condensate due to strong interaction. This condensation, known as chiral condensate, breaks the chiral symmetry of vacuum, and its expectation value decreases at high temperatures or high matter densities where the symmetry is partially restored.
Article
Chemistry, Inorganic & Nuclear
Xue-Tao Wang, Lan-Tao Cheng, Cheng Chen, Lingyun Cao, Jun Zheng, Xiu-Ying Zheng
Summary: Chiral Ln-Ag(I) clusters D/L-Ln3Ag5 with C3 symmetry were prepared by using D/L-penicillamine as multidentate ligand bridging Ln3+ and Ag(I) ions, showing tunable photoluminescence from {AgS}-to-Ln3+ with different emission bands.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Shao-Jun Hu, Xiao-Qing Guo, Li-Peng Zhou, Dan-Ni Yan, Pei-Ming Cheng, Li-Xuan Cai, Xiao-Zhen Li, Qing-Fu Sun
Summary: Chiral luminescent lanthanide-organic cages have potential applications in enantioselective recognition, sensing, and asymmetric catalysis, but their structures are limited. This study introduces a guest-driven self-assembly and chiral induction approach to construct Ln(4)L(4)-type tetrahedral hosts, showcasing remarkable guest-adaptive cavity breathing and variation tolerance on coordination geometry of f-elements.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Guandong Wang, Daiming Liu, Shuangqing Fan, Zhaoyang Li, Jie Su
Summary: In this study, high-dielectric-constant erbium oxide film was fabricated using the spin coating method and annealed at various temperatures to investigate its microstructural and electrical properties. The results demonstrate that the Er2O3 thin film fabricated on the substrate exhibits low operating voltage and good electrical properties.
Article
Chemistry, Physical
Xinghua Tan, Yongxin Zhang, Shenyang Xu, Peihua Yang, Tongchao Liu, Dongdong Mao, Jimin Qiu, Zhefeng Chen, Zhaoxia Lu, Feng Pan, Weiguo Chu
Summary: The co-doping of Mg-Al-Eu in LiCoO2 significantly improves the high-voltage cycling stability, suppresses oxygen evolution and near-surface structure deconstruction, and enhances the thermal stability of the cathode, leading to remarkable cycling performance of the battery with high operating voltages.
ADVANCED ENERGY MATERIALS
(2023)
Article
Physics, Applied
Songyang Guo, Siying Li, Tao Shen, Wei Tang, Xiaojun Guo, Juan Xin, Junjun Jin, Huili Wei, Xianbao Wang, Jinhua Li
Summary: In this study, it was found that the decrease in mobility in OTFTs using high-k relaxor ferroelectric polymer as the gate dielectric is due to the Frohlich polaron effect with increasing gate dielectric constant. Introducing a low-k polymer as a modification layer can eliminate this effect, and constructing a low-k/high-k bilayer dielectric can achieve better mobility and improved bias stability. A flexible top-gate OTFT on a polyethylene terephthalate substrate demonstrated good bending stability even after 1000 bending tests.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Han Xu, Dashan Shang, Qing Luo, Junjie An, Yue Li, Shuyu Wu, Zhihong Yao, Woyu Zhang, Xiaoxin Xu, Chunmeng Dou, Hao Jiang, Liyang Pan, Xumeng Zhang, Ming Wang, Zhongrui Wang, Jianshi Tang, Qi Liu, Ming Liu
Summary: Neuromorphic computing aims to replicate the computing processes of the brain using electronic counterparts. In this study, a compact and low-power neurotransistor based on a vertical dual-gate electrolyte-gated transistor (EGT) was developed and used for dendrite integration and computing. The results suggest that the neurotransistor-based approach may pave the way for next-generation neuromorphic computing with energy efficiency on par with those of the brain.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Waygen Thor, Yue Wu, Lei Wang, Yonghong Zhang, Peter A. Tanner, Ka-Leung Wong
Summary: The authors report a lanthanide-based compound that exhibits long-lived phosphorescence at low temperatures, showing potential applications in fields such as anti-counterfeiting and switches. Organolanthanide compounds typically have triplet state lifetimes up to tens of milliseconds, while this compound exhibits phosphorescence observable by the naked eye for up to 30 s at 77 K, providing insights into important photophysical processes.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Pin-Wen Guan, Ying Sun, Russell J. Hemley, Hanyu Liu, Yanming Ma, Venkatasubramanian Viswanathan
Summary: Researchers evaluated the feasibility of synthesizing ternary Li-Mg superhydrides using the pressure-potential method and found that appropriate electrode potentials can stabilize Li2MgH16 and Li4MgH24 at modest pressures. Three structural forms of Li2MgH16 were observed below 300 GPa, with the highest pressure phase exhibiting superconductivity.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Kayato Ooya, Jiang Li, Keiga Fukui, Soshi Iimura, Takuya Nakao, Kiya Ogasawara, Masato Sasase, Hitoshi Abe, Yasuhiro Niwa, Masaaki Kitano, Hideo Hosono
Summary: Lanthanum oxyhydrides are reported to have high hydride ion conductivity, but loading ruthenium can enhance ammonia synthesis activity. The study finds that the catalytic performance is strongly correlated with the surface H- ion mobility of the ruthenium-loaded lanthanum oxyhydrides.
ADVANCED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Qinhao Shi, Ruijuan Qi, Xiaochen Feng, Jing Wang, Yong Li, Zhenpeng Yao, Xuan Wang, Qianqian Li, Xionggang Lu, Jiujun Zhang, Yufeng Zhao
Summary: The authors propose a method to improve the performance of P2-type sodium metal oxide cathode materials by niobium doping, and demonstrate their high-efficiency energy storage performance at different temperatures through experiments.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Zhe Wang, Zedong Zheng, Chi Li
Summary: This article proposes a high efficiency dual active bridge with coupled inductor (DABCI) for fuel cell vehicles, and analyzes its operation principle and optimal operation modes. With the use of an optimal current stress modulation strategy and advanced magnetic integration technology, it achieves zero voltage switching operation in a wide load range and suppresses input current ripple, thus extending the lifespan of fuel cell vehicles and improving system power density.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Mostafa Zarghani, Sadegh Mohsenzade, Shahriyar Kaboli
Summary: The article introduces a method to optimize high voltage DC power supplies, successfully reducing the output voltage ripple level and improving precision by hybridizing a linear regulator and a high-frequency high-power DC interleaved converter.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)