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Design of artificial biomimetic channels with Na+permeation rate and selectivity potentially outperforming the natural sodium channel

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Nano Research 2024年第9期17卷 8638-8646页

作者： Zhi Zhu yan Zhao Chao Chang shaojian yan Tingyu Sun Shiyu Gu yangmei Li Dengsong Zhang Chunlei Wang Xiao Cheng Zeng School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Innovation Laboratory of Terahertz Biophysics National Innovation Institute of Defense TechnologyBeijing 100071China School of Physics Peking UniversityBeijing 100871China International Joint Laboratory of Catalytic Chemistry College of SciencesShanghai UniversityShanghai 200444China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China

Artificial ion channels that enable high-efficiency ion transport have important implications in nanofluidics and biomedical applications such as drug ***,we show a simulation-based chemical design of a biomimetic sodium channel that possesses permeation rate and selectivity potentially higher than those of the state-of-the-art natural vertebrate voltage-gated sodium ***,our theoretical findings have undergone empirical testing,aligning well with the Arrhenius law as derived from a diverse range of experimental *** high-efficiency ion transport is achieved by anchoring the carboxylate functional groups within the channel filter.A key chemical guiding principle underlying the ion channel design is that the free-energy barrier for the Na+passage across the channel should be comparable to typical thermal energy at room *** the implementation of the chemical design,we found that the relatively low free-energy barrier can be attributed to the compensation effect of the carboxylate groups to the partially lost oxygen shell of the ion within the ion channel,as well as to the consonant vibration of the ions inside and outside the *** mechanistic understanding brings new insight,at the molecular level,into the high-efficiency ion transport across the designed membrane *** proof of principle achieved from the simulations will stimulate future experimental confirmation and potential applications of the high-performance artificial channels in nanofluidics and in bioinspired iontronics.

关键词： sodium channels anchoring carboxylate functional groups molecular dynamics simulations low free-energy barrier for ion passage thermal kinetic energy

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同位素电池研发与应用进展

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核科学与工程 2024年第1期44卷 224-232页

作者：汪进魏世平金鸣李春京马智欣王伟李亚洲王芳洒荣园闫少健胡源吴宜灿凤麟核团队中子科学国际研究院山东青岛266041 山东省中子科学技术重点实验室山东青岛266199 中国科学技术大学安徽合肥230026

放射性同位素电池因其在特定应用领域具有不可替代性和巨大的战略意义,而受到世界先进国家政府、学术界与工业界的广泛关注。本文首先介绍了同位素电池的应用现状,然后从同位素电池研发历史、最新进展和技术瓶颈等方面介绍了同位素电池... 详细信息

放射性同位素电池因其在特定应用领域具有不可替代性和巨大的战略意义,而受到世界先进国家政府、学术界与工业界的广泛关注。本文首先介绍了同位素电池的应用现状,然后从同位素电池研发历史、最新进展和技术瓶颈等方面介绍了同位素电池研究进展,最后讨论了同位素电池未来重点研发方向并对我国同位素电池发展提出现实可行的建议,以期望实现我国同位素电池技术快速超车和到达世界一流水平。

关键词：同位素电池温差发电辐射伏特效应

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Effect of Annealing Temperature on CrN Microspheres Synthesized by CAP Technology

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Wuhan University Journal of Natural Sciences 2014年第6期19卷 544-548页

作者： TIAN Canxin yan shaojian HAN Bin FU Dejun School of Physics and Technology Wuhan University

CrN microspheres were synthesized by using a cathodic arc plasma source system. The obtained samples were annealed in air at temperatures of 300-800 ℃ for 60 min. The influence of annealing temperature on the microstructure and surface morphology of the CrN microspheres was investigated. The CrN microspheres were characterized by means of scanning electron microscopy, transmission electron microscopy and X-ray diffraction analysis. The results show that the CrN nanoparticles arranged into leaf-like structures before annealing. With the rising of the annealing temperature, the size of CrN crystal nanoparticals became larger. When the annealing temperature exceeded the oxidation point（500 ℃）, the CrN was oxidized and the leaf-like structure was broken. With further increase of the annealing temperature（700 ℃）, the arrangement of CrN nanoparticles was changed from leaf-like structure to be discrete.

关键词： CrN microsphere annealing temperature leaf-like structure cathodic arc plasma

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基于信道短化和圆球译码的水声通信迭代序列检测

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哈尔滨工程大学学报（英文版） 2024年第1期23卷 238-246页

作者：瞿逢重方浩涂星滨魏艳章旻昊杨劭坚 The Engineering Research Center of Oceanic Sensing Technology and Equipment Ministry of EducationZhoushan 316021China The Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang Province Zhejiang UniversityZhoushan 316021China Hainan Institute of Zhejiang University Sanya 572025China

The demand for high-data-rate underwater acoustic communications(UACs)in marine development is increasing;however,severe multipaths make demodulation a *** decision feedback equalizer(DFE)is one of the most popular equalizers in UAC;however,it is not the optimal *** maximum likelihood sequence estimation(MLSE)is the optimal algorithm,its complexity increases exponentially with the number of channel taps,making it challenging to apply to ***,this paper proposes a complexity-reduced MLSE to improve the bit error rate(BER)performance in multipath *** the proposed algorithm,the original channel is first shortened using a channel-shortening method,and several dominant channel taps are selected for ***,sphere decoding(SD)is performed in the following *** are applied to eliminate inter-symbol interference caused by weak channel *** simulation and sea experiment demonstrate the superiority of the proposed *** simulation results show that channel shortening combined with SD can drastically reduce computational complexity,and iterative SD performs better than DFE based on recursive least squares(RLS-DFE),DFE based on improved proportionate normalized least mean squares(IPNLMS-DFE),and channel estimation-based DFE(CE-DFE).Moreover,the sea experimental results at Zhairuoshan Island in Zhoushan show that the proposed receiver scheme has improved BER performance over RLSDFE,IPNLMS-DFE,and *** with the RLS-DFE,the BER,after five iterations,is reduced from 0.0076 to 0.0037 in the 8–12 k Hz band and from 0.1516 to 0.1145 in the 13–17 k Hz band at a distance of 2000 ***,the proposed algorithm makes it possible to apply MLSE in UAC in practical scenarios.

关键词： Underwater acoustic communications(UACs) Maximum likelihood sequence estimation(MLSE) Channel shortening Sphere decoding(SD) Iterative detection

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超声混粉电火花加工热力学仿真及表面形貌研究

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制造技术与机床 2024年第1期 164-170页

作者：董颖怀张少剑王岩牛跃博周文天津科技大学机械工程学院天津300222

为了研究超声振动和混粉对电火花加工的影响,基于传热理论,结合超声和混粉特性建立了超声混粉电火花传热模型。基于建立的传热模型对超声混粉电火花加工去除材料过程进行瞬态热力学仿真,并通过实验验证了仿真结果的准确性。通过仿真和... 详细信息

为了研究超声振动和混粉对电火花加工的影响,基于传热理论,结合超声和混粉特性建立了超声混粉电火花传热模型。基于建立的传热模型对超声混粉电火花加工去除材料过程进行瞬态热力学仿真,并通过实验验证了仿真结果的准确性。通过仿真和实验分析了普通电火花、超声电火花、混粉电火花和超声混粉电火花四种加工方式,结果表明超声混粉电火花加工效率比普通电火花加工效率提高了23%。加入混粉和施加超声可以减少加工表面积碳,提高表面质量;可以使放电凹坑变得更加规则,使表面粗糙度降低。混粉电火花加工相对于普通电火花加工其表面粗糙度平均降低了8.9%,超声混粉电火花表面粗糙度相对于普通电火花平均降低了4.3%。

关键词：超声振动混粉温度场表面形貌高斯热源

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碳含量对TiCN涂层的结构和力学性能的影响

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武汉大学学报（理学版） 2015年第5期61卷 445-448页

作者：李银成闫少健韩滨王微付德君武汉大学物理科学与技术学院湖北武汉430072

采用多弧离子镀技术,以N2为氮源,C2H2为碳源,Ti为靶源,在单晶硅和硬质合金衬底上沉积Ti CN硬质涂层,系统地研究制备工艺对Ti CN涂层的结构、形貌、硬度及摩擦学性能的影响.用X射线衍射、原子力显微镜和扫描电子显微镜测量了涂层的形貌... 详细信息

采用多弧离子镀技术,以N2为氮源,C2H2为碳源,Ti为靶源,在单晶硅和硬质合金衬底上沉积Ti CN硬质涂层,系统地研究制备工艺对Ti CN涂层的结构、形貌、硬度及摩擦学性能的影响.用X射线衍射、原子力显微镜和扫描电子显微镜测量了涂层的形貌和晶体结构;用HX-1000显微硬度计和HH-3000划痕仪测量了涂层的硬度和结合强度.研究结果表明:Ti CN和Ti N涂层同为单相的Na Cl型面心立方结构;在优化条件下制备的Ti CN涂层的最高硬度为38.5 GPa,远高于Ti N涂层的27.9 GPa硬度;Ti CN涂层与硬质合金的膜基结合力超过70 N.

关键词：多弧离子镀 TiCN 显微硬度结合力

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废弃胺肟树脂气流膨化碳化及其吸附Pb^(2+)研究

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广东化工 2024年第2期51卷 79-83,96页

作者：蒋延明廖艳刘云黄嘉欣韦凤唐春海马少健何春林广西大学资源环境与材料学院广西南宁530004 省部共建特色金属材料与组合结构全寿命安全国家重点实验室广西南宁530004

胺肟树脂作为镓的吸附树脂,在反复吸附-解吸1月后失效,孔道塌陷官能团失效,每年产生废弃树脂量大。为了对废弃胺肟树脂进行资源化利用,提出“爆米花”式气流膨化法对废胺肟树脂进行膨化扩孔处理,并探究膨化树脂对溶液Pb^(2+)离子的吸附... 详细信息

胺肟树脂作为镓的吸附树脂,在反复吸附-解吸1月后失效,孔道塌陷官能团失效,每年产生废弃树脂量大。为了对废弃胺肟树脂进行资源化利用,提出“爆米花”式气流膨化法对废胺肟树脂进行膨化扩孔处理,并探究膨化树脂对溶液Pb^(2+)离子的吸附行为,膨化实验和吸附实验结果表明:废胺肟树脂的含水率,罐体预热温度,膨化压力对膨化效果影响大;膨化树脂对溶液中对Pb^(2+)的饱和吸附容量为221.02 mg/g,吸附符合准二级动力学(R^(2)=0.9999)和Langmuir等温模型(R^(2)=0.9906),主要以化学吸附为主。研究结果为废弃胺肟树脂再生利用及溶液含铅废水处理提供一种新吸附材料,为废弃胺肟树脂对资源化处理提供一种新途径。

关键词：胺肟树脂铅气流膨化吸附螯合

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Analysis of the distribution characteristics of enterovirus types based on environmental surveillance from 2013 to 2021 in Fujian Province, China

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生物安全与健康(英文) 2023年第4期5卷 240-249页

作者： Xiuhui yang shaojian Cai Xiaoqian Wu Yong Zhang Dong Li Yahong Chen Qianjing Chen Shuangli Zhu Dongmei yan Wenbo Xu Hairong Zhang Zhifei Chen Suhan Zhang Yong Zhou Mengping Zhang Ningxuan Zheng Na You Fujian Province Key Laboratory of Zoonosis Research Fujian Center for Disease Control and PreventionFuzhou 350012China School of Basic Medical Sciences Fujian Medical UniversityFuzhou 350108China WHO WPRO Regional Polio Reference Laboratory and Ministry of Health Key Laboratory for Medical Virology National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionChangping DistrictBeijing 102206China Quanzhou Center for Disease Control and Prevention Quanzhou 362018China Longyan Center for Disease Control and Prevention Longyan 364000China Public Health School of Fujian Medical University Fuzhou 350108China

Environmental surveillance (ES) is a useful approach for monitoring circulating viruses, including polioviruses (PVs) and non-polio enteroviruses (NPEVs). In this study, the results of nine years of ES from 2013 to 2021 at six sampling sites in three cities in Fujian Province, China, were summarized. It showed that the sewage samples contained abundant viruses, but the positive rate was affected by different sampling sites. From the 520 samples, 431 PVs, 1,713 NPEVs, and 281 human adenoviruses (HAdVs) were isolated. PV isolates had been markedly affected following the adjustment of the immunization strategy. All but one PV isolate were Sabin-like strains without wild PVs. One isolate was vaccine-derived PV type 3 with 10 variation points in theVP1 region. After May 2016, PV type 2 was no longer detected, and PV type 3 became a superior serotype. Of 1,713 NPEVs, 24 serotypes were identified, including echovirus11 (E11), E6, coxsackievirus B3 (CVB3), CVB5, E7, and E3 were the predominant serotypes (37.65%, 20.96%, 11.50%, 8.87%, 8.23%, and 7.06%, respectively). The temporal dynamic of the six common serotypes was inconsistent. E3 was frequently isolated, but the number of isolates was low, with no obvious peaks. E6, E7, and CVB3 exhibited periodic changes with a high peak every three to four years, and E11 only had one high peak lasting four years. Summer-fall peaks of the echoviruses and spring-winter peaks of CVB were observed in the monthly distribution of virus isolation. The infectious isolates of various serotypes of different species identified from the sewage samples showed that ES is an essential part of pathogen surveillance.

关键词： Enterovirus surveillance Enteroviruse Poliovirus Distribution characteristics

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Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater

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Journal of Leather Science and Engineering 2020年第1期2卷 269-278页

作者： Lin Xiang Jiayou Lin Qin yang shaojian Lin Sheng Chen Bin yan College of Biomass Science and Engineering National Engineering Laboratory for Clean Technology of Leather ManufactureSichuan UniversityChengdu 610065China

Cr(Ⅵ)containing industrial wastewaters are highly toxic and carcinogenic,and severely threats living creatures and the ***,it is highly desired yet challenging to develop an available and economical adsorbent for simultaneously detoxifying Cr(Ⅵ)anions to Cr(Ⅲ)ions and removing them from the *** we propose a facile method for rapid removal of Cr(Ⅵ)ions from the wastewater by using a synthetic polydopamine microsphere(PPM)adsorbent with hierarchical *** as-prepared PPM exhibits high Cr(Ⅵ)removal capacity of 307.7 mg/g and an outstanding removal *** can effectively decrease the Cr(Ⅵ)concentration to lower than 0.05 mg/L well below the limits for drinking water standard of WHO regulations in 60 s at pH *** importantly,PPMs can reduce the lethal Cr(Ⅵ)anions to Cr(Ⅲ)ions with low toxicity,and simultaneously immobilize them on the matrices of PPMs.

关键词： Porous polydopamine microspheres Cr(Ⅵ) Cr(Ⅲ) Adsorption and detoxification

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Scanning tunneling microscopic observation of enhanced superconductivity in epitaxial Sn islands grown on SrTiO3 substrate

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Science Bulletin 2018年第20期63卷 1332-1337页

作者： Zhibin Shao Zongyuan Zhang Hui Yuan Haigen Sun yan Cao Xin Zhang shaojian Li Habakubaho Gedeon Tao Xiang Qi-Kun Xue Minghu Pan School of Physics Huazhong University of Science and TechnologyWuhan 430074China Institute of Physics Chinese Academy of ScienceBeifing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100084China State Key Laboratory of Low-Dimensional Quantum Physics Tsinghua UniversityBejiing 100084China

Recent experimental and theoretical studies of single-layer FeSe film grown on SrTiO_3 have revealed interface enhanced superconductivity, which opens up a pathway to promote the superconducting transition temperature. Here, to investigate the role of SrTiO_3 substrate in epitaxial superconducting film, we grew a conventional superconductor b-Sn(bulk T_c～ 3.72 K) onto SrTiO_3 substrate by molecular beam epitaxy. By employing scanning tunneling microscope and spectroscopic measurements, an enhanced Tcof 8.2 K is found for epitaxial b-Sn islands, deduced by fitting the temperature dependence of the gap values using the BCS formula. The observed interfacial charge injection and enhanced electron–phonon coupling are responsible for this Tcenhancement. Moreover, the critical field of 8.3 T exhibits a tremendous increase due to the suppression of the vortex formation. Therefore, the coexistence of enhanced superconductivity and high critical field of Sn islands demonstrates a feasible and effective route to improve the superconductivity by growing the islands of conventional superconductors on perovskite-type titanium oxide substrates.

关键词： Sn islands/SrTiO3 Interface-enhanced superconductivity Molecular beam epitaxy Scanning tunneling microscope Scanning tunneling spectroscopy

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