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| 1 | Synthesis and ordered aggregation in water of a blue light-emitting PEO-PHP-PEO triblock oligomer显示文摘A novel blue light-emitting coil-rod-coil triblock oligomer, PEO-PHP-PEO, which consists of para-hexaphenyl (PHP) as the rigid rod and poly(ethylene oxide) (PEO, M w = 750) as the flexible coil, has been synthesized. It is the first soluble poly(para-phenylene) molecule containing no lateral substituent, which can dissolve not only in organic solvents such as chloroform and THF, but also in water. The critical micelle concentration (CMC) of PEO-PHP-PEO in water is 5.25×10-4 mol·L-1 and the surface tension at CMC, 鉉MC, is 61.29 mN·m-1. The absorption peak of the molecularly dissolved PEO-PHP-PEO in water is centered at 323 nm and the fluorescence spectrum has a maximum at 432 nm and shows the vibronic fine structure typical of molecular dissolution. The photoluminescence spectrum of the aggregate solution is similar to that of the PHP polycrystal film, indicating that the ordered packing of PHP block has taken place due to a combination of hydrophobic interaction and p-p stacking. The oligomer self-assembles into cotton-like nanofibers with diameter of about 20 nm in 5.0×10-3 mol·L-1 aqueous solution. | HE Haifeng, CAO Hongqing, WAN Xinhua, TU Yingfeng, CHEN Xiaofang & ZHOU Qifeng Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Correspondence should be addressed to Wan Xinhua (e-mail: xhwan@pku.edu.cn) | 2003 | Chinese Science Bulletin2003，48，15： | 2 |
| 2 | Fast Zn^(2+)mobility enabled by sucrose modified Zn^(2+)solvation structure for dendrite-free aqueous zinc battery显示文摘Aqueous zinc battery has been regarded as one of the most promising energy storage systems due to its low cost and environmental benignity.However,the safety concern on Zn anodes caused by uncontrolled Zn dendrite growth in aqueous electrolyte hinders their application.Herein,sucrose with multi-hydroxyl groups has been introduced into aqueous electrolyte to modify Zn^(2+)solvation environment and create a protection layer on Zn anode,thus effectively retarding the growth of zinc dendrites.Atomistic simulations and experiments confirm that sucrose molecules can enter into the solvation sheath of Zn^(2+),and the as-formed unique solvation structure enhances the mobility of Zn^(2+).Such fast Zn^(2+)kinetics in sucrose-modified electrolyte can successfully suppress the dendrite growth.With this sucrose-modified aqueous electrolyte,Zn/Zn symmetric cells present more stable cycle performance than those using pure aqueous electrolyte;Zn/C cells also deliver an impressive higher energy density of 129.7 Wh·kg^(−1)and improved stability,suggesting a great potential application of sucrose-modified electrolytes for future Zn batteries. | Yufang Cao Xiaohui Tang Linge Li Haifeng Tu Yuzhen Hu Yingying Yu Shuang Cheng Hongzhen Lin Liwen Zhang Jiangtao Di Yongyi Zhang Meinan Liu | 2023 | Nano Research2023，16，3： | 0 |
| 3 | Self-Assembled Porous-Reinforcement Microstructure-Based Flexible Triboelectric Patch for Remote Healthcare显示文摘Realizing real-time monitoring of physiological signals is vital for preventing and treating chronic diseases in elderly individuals. However,wearable sensors with low power consumption and high sensitivity to both weak physiological signals and large mechanical stimuli remain challenges.Here, a flexible triboelectric patch(FTEP) based on porous-reinforcement microstructures for remote health monitoring has been reported. The porousreinforcement microstructure is constructed by the self-assembly of silicone rubber adhering to the porous framework of the PU sponge. The mechanical properties of the FTEP can be regulated by the concentrations of silicone rubber dilution. For pressure sensing, its sensitivity can be effectively improved fivefold compared to the device with a solid dielectric layer, reaching 5.93 kPa^(-1) under a pressure range of 0–5 kPa. In addition, the FTEP has a wide detection range up to 50 kPa with a sensitivity of 0.21 kPa^(-1). The porous microstructure makes the FTEP ultra-sensitive to external pressure, and the reinforcements endow the device with a greater deformation limit in a wide detection range. Finally, a novel concept of the wearable Internet of Healthcare(Io H) system for real-time physiological signal monitoring has been proposed, which could provide real-time physiological information for ambulatory personalized healthcare monitoring. | Hao Lei Haifeng Ji Xiaohan Liu Bohan Lu Linjie Xie Eng Gee Lim Xin Tu Yina Liu Peixuan Zhang Chun Zhao Xuhui Sun Zhen Wen | 2023 | Nano-Micro Letters2023，15，7： | 0 |
| 4 | Pumpability of Manufactured Sand Self-compacting Concrete显示文摘By the addition of superplasticizer and air entraining agent,manufactured sand selfcompacting concrete(MS SCC)with slump flow varying from 500 to 700 mm and air content varying from 2.0%to 9.0%were prepared and the pumpability of MS SCC was studied by a sliding pipe rheometer(Sliper).According to the Kaplan’s model,the initial pump pressure and the pump resistance of MS SCC were obtained.Meanwhile,rheological properties including the yield stress and the plastic viscosity of MS SCC were measured by a rheometer.The experimental results show that the increase of slump flow contributes to a higher pumpability and a proper air content,i e,6%is beneficial for the pumpability of MS SCC.Due to the existence of stone powder and stronger angularity of MS,the initial pump pressure of MS SCC is only about 60%-88%that of river sand(RS)SCC with the same slump flow and air content,indicating that MS SCC possesses a higher pumpability than RS SCC. | LI Huajian HUANG Fali TU Haifeng SUN Deyi WANG Zhen YI Zhonglai YANG Zhiqiang XIE Yongjiang | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，6： | 0 |
| 5 | Indications,strategies,and development on prostate targeted biopsy:Report of the Panjiayuan Consensus Conference 2022显示文摘Prostate biopsy is the gold standard for diagnosing prostate cancer(PCa).Prostate targeted biopsy(TB)having a higher rate of detecting clinically significant PCa(csPCa)than traditional systematic biopsy(SB)is supported by high-quality evidence.However,the TB indications and strategies are controversial.The National Cancer Center/Cancer Hospital,Chinese Academy of Medical Sciences,invited a panel of recognized urology experts in PCa to address these topics at the Panjiayuan Consensus Conference 2022.The conference results on prostate TB are presented herein.The National Cancer Center/Cancer Hospital,Chinese Academy of Medical Sciences identified 10 key areas of prostate biopsy:(1)selection of imaging examination;(2)indications of TB;(3)transperineal and transrectal prostate biopsy;(4)TB pathways;(5)TB and SB;(6)three techniques of TB;(7)the number of TB cores needed for one lesion;(8)core number for SB;(9)free-hand TB;(10)future development of TB/prostate diagnosis.Thus,a panel of 25 recognized urologists and 2 radiologists from China were invited to attend this conference.The panel voted anonymously on 14 predetermined questions.Voting was based on the panelists'clinical practice and opinion,rather than high-level evidence.The voting outcomes were supported by the panel unequally,and details of the voting results were reported.The voting results can help clinicians to decide on biopsy timing and proper strategies,for which guidelines are sparse.We also focused on the future development of TB and SB,such as the combined pathway of TB and SB,techniques of TB,biopsy cores,free-hand TB,and prostate-specific membrane antigen positron emission tomography/computed tomography. | Gang Song Yajian Li Huimin Hou Yichen Wang Xuejuan Wang Shaoxi Niu Xiang Tu Hongliang Shen Zhien Zhou Yinbing Wang Ruiyi Yan Ning Xu Gejun Zhang Hailong Hao Shudong Zhang Ben Liu Bin Yang Baojun Wang Haifeng Wang Haifeng Huang Qian Zhang Baijun Dong Yonghong Li Jianbin Bi Weigang Yan Hongqian Guo Yuanjie Niu Guosheng Yang Ming Liu Qiang Wei Nianzeng Xing | 2023 | UroPrecision2023，1，1： | 0 |
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