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Your search keyword '"Cao, Yun-Fei"' showing total 117 results
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117 results on '"Cao, Yun-Fei"'

5. Two resistance-switchable hybrid polyoxotantalates based on {Co2Ta12} clusters.

Author

Cao, Yun-Fei, Lin, Yu-Jin, Li, Xin-Xiong, Sun, Yan-Qiong, and Zheng, Shou-Tian

Subjects
*ALKALI metal ions, *ALKALI metals, *TANTALUM, *DIMERS
Abstract

Two inorganic–organic hybrid polyoxotantalates, H4[Na(H2O)5]2[CoII(en)3]2{[CoIII(en)]2(Ta6O19)2}·22H2O (1) and H2K2Na6 (H2O)24{[CoIII(en)]2(Ta6O19)2}·33H2O (2) have been constructed from {[CoIII(en)(Ta6O19)]2}10− ({Co2Ta12}) dimers. Compound 1 has a three-dimensional supramolecular framework with a pcu-type topology. Compound 2 possesses a three-dimensional structure composed of {Co2Ta12} dimers and alkali metal ions (Na+/K+) via coordination bonds. Polyoxotantalates 1 and 2 have been used as active materials for ITO/1/Ag and ITO/2/Ag RRAM devices. These devices exhibit stable non-volatile storage behavior and rewritable resistive switching with high ON/OFF ratios of 1.43 × 103 and 2.17 × 104 for 1-based and 2-based RRAM devices, respectively, and stable cyclic performance during 100-cycle stability tests. This discovery opens up new opportunities for the development of electrical bistability materials. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Cross-Band Decoupling Method for Dual-Band Aperture-Shared Antenna Array Using Metasurfaces

Author

Zhai, Jian Hong, Cao, Yun Fei, Xue, Quan, and Che, Wenquan

Abstract

One method of using a metasurface to reduce the cross-band mutual interference of the dual-band aperture-shared antenna array is proposed. A base-station dual-band antenna array is designed to validate the method and is composed of a lower-band (LB) antenna element, $2\times2$ higher-band (HB) antenna elements, and a metasurface. The metasurface exhibits the bandstop characteristic in the HB and cancels the HB radiation from the LB antenna. Meanwhile, the metasurface absorbs part of the HB electromagnetic wave from the LB antenna. As a result, the mutual coupling between the LB and HB antennas is suppressed substantially. The metasurface causes little loss for the LB antenna. The dual-band aperture-shared antenna array covers the bands of 1.7–2.7 GHz (45.5%) and 3.3–3.8 GHz (14.1%). The simulated and measured results show that the proposed array has high port-to-port isolation, wide bandwidth, and stable radiation patterns in both the LB and HB.

Published
2024
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13. An integrated assessment of INDCs under Shared Socioeconomic Pathways: an implementation of C3IAM

Author

Wei, Yi-Ming, Han, Rong, Liang, Qiao-Mei, Yu, Bi-Ying, Yao, Yun-Fei, Xue, Mei-Mei, Zhang, Kun, Liu, Li-Jing, Peng, Juan, Yang, Pu, Mi, Zhi-Fu, Du, Yun-Fei, Wang, Ce, Chang, Jun-Jie, Yang, Qian-Ru, Yang, Zili, Shi, Xueli, Xie, Wei, Liu, Changyi, Ma, Zhongyu, Tan, Jinxiao, Wang, Weizheng, Tang, Bao-Jun, Cao, Yun-Fei, Wang, Mingquan, Wang, Jin-Wei, Kang, Jia-Ning, Wang, Ke, and Liao, Hua

Published
2018
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