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| 1 | Preparation of bunched CeO_(2) and study on microwave absorbing properties with MWCNTs binary composite显示文摘A novel bunched cerium oxide(CeO_(2))was prepared and its binary composite material with multi-walled carbon nanotubes presented an excellent microwave absorbing properties.The morphology,structure,and absorbing properties of the composite material were investigated.It was found that the minimum reflection loss(RL)of the composite material at 15.79 GHz was−45.7 dB when the thickness was 5.5 mm.It was worth noting that when the composite material was in the thickness range of 5.0-7.5 mm and the frequency was 11.36-17.77 GHz,the electromagnetic wave RL was<−30 dB,which illustrated that the composite material had a good absorbing effect over a wide thickness range.The results of the study contributed to the design and preparation of efficient microwave absorbing materials(MAM)with rare earth oxide composites and their applications,which demonstrated the importance of new composites with special structures in the field of MAM. | Yingjie Guo Xiangrui Song Sihang Ma Yinghe Qi Xiaotao Yuan Huili Fan | 2023 | Particuology2023，，2： | 0 |
| 2 | Zwitterionic polymers:Addressing the barriers for drug delivery显示文摘Nanocarriers play an important role in drug delivery for disease treatment.However,nanocarriers face a series of physiological barriers after administration such as blood clearance,nonspecific tissue/cell localization,poor cellular uptake,and endosome trapping.These physiological barriers seriously reduce the accumulation of drugs in target action site,which results in poor therapeutic efficiency.Although polyethylene glycol(PEG)can increase the blood circulation time of nanocarriers,its application is limited due to the“PEG dilemma”.Zwitterionic polymers have been emerging as an appealing alternative to PEG owing to their excellent performance in resisting nonspecific protein adsorption.Importantly,the diverse structures bring functional versatility to zwitterionic polymers beyond nonfouling.This review focuses on the structures and characters of zwitterionic polymers,and will discuss and summarize the application of zwitterionic polymers for drug delivery.We will highlight the strategies of zwitterionic polymers to address the physiological barriers during drug delivery.Finally,we will give some suggestions that can be utilized for the development of zwitterionic polymers for drug delivery.This review will also provide an outlook for this field.Our aim is to provide a comprehensive and systemic review on the application of zwitterionic polymers for drug delivery and promote the development of zwitterionic polymers. | Muzi Li Wen Zhang Jiaxin Li Yinghe Qi Chen Peng Nan Wang Huili Fan Yan Li | 2023 | Chinese Chemical Letters2023，34，11： | 0 |
| 3 | Improvement Up-conversion Luminescence Properties of SrIn_2O_04:Er^(3+) by Doping Yb^(3+) as Sensitizer显示文摘A series of Yb^(3+)/Er^(3+) or Er^(3+) doped SrIn_2O_4 were synthesized by a high temperature solid state method.The up-conversion luminescence property and the phase formation of SrIn_2O_4:Er^(3+) and SrIn_2O_4:Yb^(3+),Er^(3+) were investigated by X-ray diffraction(XRD) and spectral methods.The XRD pattern shows that incorporating different amounts of Yb^(3+)and Er^(3+) have no influence on the phase formation of SrIn_2O_4.The up-conversion luminescence spectrum of SrIn_2O_4:Er^(3+) presented a weak luminescence due to ground state absorption of Er^(3+).However,Yb^(3+)/Er^(3+) codoped SrIn_2O_4 depicted the green(525 and 551 run) and red(662 nm) up-conversion luminescence which were assigned to the energy transfer from the Yb^(3+) transition ~2F_(7/2)-~2F_(5/2) to the Er^(3+) transitions ~2H_(11/2)-~4I_(15/2) and ~4F_(9/2-~4I_(15/2),respectively.The possible up-conversion luminescence mechanism of SrIn_2O_4:Yb^(3+),Er^(3+) was analyzed.All results could be helpful to the development of up-conversion luminescence materials. | QI Shuai TIAN Yinghe LI Yong ZHANG Huan LI Xiang YOU Jianqi YUAN Xiaoxian WANG Zhijun LI Panlai LIU Haiyan | 2016 | Journal of the Chinese Ceramic Society2016，，2： | 0 |
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