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Flow Injection Analysis Technique for Online Preconcentration of Lead Ions in Airborne Particulate Matter Using Imprinted Polymer as the Sorbent

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Journal of Analysis and Testing 2024年第2期8卷 180-190页

作者： Muhammad Bachri Amran Novita Ambarsari Muhammad Ali Zulfikar Asri Indrawati Rusnadi Rusnadi Saipul Hamdi Analytical Chemistry division Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungBandung 40132Indonesia research center for Climate and Atmosphere National Research and Innovation AgencyBandung 40135Indonesia

This work reported a simple and sensitive flow injection analysis(FIA)technique coupled with a Flame Atomic Absorption Spectrophotometer(FAAS)for online preconcentration of lead(Ⅱ)ions in the airborne particulate matter samples(PM_(2.5))using ion-imprinted polymers as adsorbent packed in minicolumn.A bulk polymerization method was chosen to synthesize the polymer based on a ternary complex of lead ions with 4-2-pyridilazo resorcinol and 4-vinyl pyridine with methacrylic acid as a functional *** optimum pH for sorption was 6,and other variables for the FIA system were optimized,including breakthrough volume,eluent concentration,and eluent *** optimum conditions were reached with a breakthrough volume of 4.45 mL,calculated as a dynamic retention capacity of 5.20 mg/g of Pb(II)40 mg/L,with a 1.5 mL/min flow *** eluent used for the FIA system was 0.5 mL HNO_(3)of 3 mol/***,precision,and limits of detection of the FIA system were determined before being applied to preconcentration and analysis of lead ions in PM_(2.5)*** precision of the method was determined to be 3.09%by calculating the coefficients of the *** of the method in the concentration range of 50-1000μg/L gave a coefficient correlation of 0.9925,showing a good response,and the limit of detection of the system was 5.11μg/L,better than that of the FAAS *** of the FIA system were evaluated and showed good results with an enrichment factor of more than 20 times higher and a concentration efficiency of 11.65 min^(-1)with a consumptive index of 4.5 *** and analysis of the PM_(2.5)samples in Bandung City showed the concentrations of Pb(II)were 26.67μg/L and 33.3μg/L with the accuracy of the method for each sample of104.75%and 107.86%.

关键词： Flow injection analysis Lead(II)ions Imprinted polymer Particulate matter

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通过具有高表面能和延长共轭链段的耐溶剂空穴传输材料实现高效喷墨打印QLED

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Science China Materials 2024年第1期67卷 205-213页

作者：邱庚锐易袁秋强谢黎明苏富燕王婷苏文明崔铮 Printable Electronics research center Nano Devices and Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Nano Science&Technology Institute University of Science and Technology of ChinaSuzhou 215123China pi-Conjugated polymers Unit Okinawa Institute of Science and Technology1919-1 TanchaOnna-sonKunigami-gunOkinawa 904-0495Japan

量子点发光二极管(QLED)溶液法制备的特点和喷墨打印高度契合,在印刷显示器领域展现出巨大的应用潜力.制作QLED器件时,下层薄膜的表面能对上层薄膜的铺展起着至关重要的作用,高表面能可以促进不同功能膜层之间的紧密接触并减少漏电流.然... 详细信息

量子点发光二极管(QLED)溶液法制备的特点和喷墨打印高度契合,在印刷显示器领域展现出巨大的应用潜力.制作QLED器件时,下层薄膜的表面能对上层薄膜的铺展起着至关重要的作用,高表面能可以促进不同功能膜层之间的紧密接触并减少漏电流.然而,已报道的交联空穴传输材料(HTM)低的表面能不利于喷墨打印.在此,我们通过分子设计开发了一种可交联HTM及其聚合物,新的聚合物命名为[9-(4-(乙氧基甲基)苯基)-3-(7-(9-(4-(己炔基)乙氧基甲基)苯基)-9H-咔唑-3-基)-9H-芴]-9H-咔唑(PDA-FLCZ),由3,3′-(9,9-二甲基-9H-芴-2,7-二基)双[9-(4-(丙-2-炔-1-氧基)甲基)苯基]-9H-咔唑(DA-FLCZ)聚合得到.这种新型HTM采用原位光热交联和预聚后热交联两种交联策略,都可以在较低的交联温度下形成稳定的网络结构,具有优异的耐溶剂性和较高的表面能.通过优化交联工艺,交联PDA-FLCZ薄膜实现了更高的空穴迁移率和更低的陷阱密度,其对应的旋涂QLED器件的最大外量子效率(EQE)达到17.59%,比基于DA-FLCZ的器件(14.25%)高出23%.此外,基于交联PDA-FLCZ的喷墨打印QLED显示出15.28%的最大EQE,接近其旋涂器件值的90%.

关键词：空穴传输材料量子点发光二极管喷墨打印空穴迁移率耐溶剂性交联工艺热交联溶液法

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Effect of Al_(2)O_(3)on the Mechanical Properties of(B_(4)C+Al_(2)O_(3))/Al neutron Absorbing Materials

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Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1411-1420页

作者： J.X.Cai B.M.Shi N.Li Y.Liu Z.G.Zhang Y.N.Zan Q.Z.Wang B.L.Xiao Z.Y.Ma Shi‑Changxu Innovation center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of Materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear *** order to improve the high-temperature mechanical properties of B_(4)C/Al composites,in-situ nano-Al_(2)O_(3)was introduced utilizing oxide on Al powder *** this study,the Al_(2)O_(3)content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al_(2)O_(3)content on the tensile properties of(B_(4)C+Al_(2)O_(3))/Al *** was found that the pinning effect of Al_(2)O_(3)on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high *** the result,with the increase in Al_(2)O_(3)content and the decrease in grain size,the high-temperature strength of the composites increased *** finest Al powder used in this investigation had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350℃,surpassing that of traditional B_(4)C/Al composites.

关键词： Al matrix composites neutron absorbing materials (B_(4)C+Al_(2)O_(3))/Al composites High-temperature strength

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Organization of microtubule plus-end dynamics by phase separation in mitosis

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Journal of Molecular Cell Biology 2024年第2期16卷 24-35页

作者： Fengrui Yang Mingrui Ding Xiaoyu Song Fang Chen Tongtong Yang Chunyue Wang Chengcheng Hu Qing Hu Yihan Yao Shihao Du Phil YYao Peng Xia Gregory Adams Jr Chuanhai Fu Shengqi Xiang Dan Liu Zhikai Wang Kai Yuan Xing Liu MOE Key Laboratory for Membraneless Organelles&Cellular Dynamics Hefei National Research Center for Cross-disciplinary SciencesCenter for Advanced Interdisciplinary Science and Biomedicine of IHMDivision of Life Sciences and MedicineUniversity of Science&Technology of ChinaHefei 230027China Anhui Key Laboratory for Cellular Dynamics and Chemical Biology University of Science&Technology of ChinaHefei 230027China Keck center for Organoids Plasticity Morehouse School of MedicineAtlantaGA 30310USA Hunan Key Laboratory of Molecular Precision Medicine Central South UniversityChangsha 410083China

In eukaryotes,microtubule polymers are essential for cellular plasticity and fate ***-binding(EB)proteins serve as scaffolds for orchestrating microtubule polymer dynamics and are essential for cellular dynamics and chromosome segregation in ***,we show that EB1 forms molecular condensates with TIP150 and MCAK through liquid–liquid phase separation to compartmentalize the kinetochore–microtubule plus-end machinery,ensuring accurate kinetochore–microtubule interactions during chromosome segregation in *** of EB1–TIP150 polymer formation by a competing peptide prevents phase separation of the EB1-mediated complex and chromosome alignment at the metaphase equator in both cultured cells and Drosophila ***220 of EB1 is dynamically acetylated by p300/CBP-associated factor in early mitosis,and persistent acetylation at Lys220 attenuates phase separation of the EB1-mediated complex,dissolves droplets in vitro,and harnesses accurate chromosome *** data suggest a novel framework for understanding the organization and regulation of eukaryotic spindle for accurate chromosome segregation in mitosis.

关键词： phase separation mitosis microtubule dynamics EB1 acetylation

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Dynamic asymmetric mechanical responsive carbon nanotube fiber for ionic logic gate

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Chinese Chemical Letters 2024年第6期35卷 249-253页

作者： Pei Cao Yilan Wang Lejian Yu Miao Wang Liming Zhao Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Engineering research center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

Inspired by biological ion channels,numerous artificial asymmetric ion channels have been synthesized to facilitate the fabrication of ionic ***,the creation of biomimetic asymmetric ion channels necessitates expensive scientific apparatus and intricate material processing procedures,which constrains its advancement within the realm of ionic *** this study,we have devised dynamic asymmetric ion channels with mechanical responsiveness by combining polymers of varying elastic modulus along the longitudinal axis of carbon nanotube fiber(CNTF).The ion rectification can be modulated via the disparate response of CNTF-based ion channels to mechanical *** have effectively employed these asymmetric ion channels with mechanical sensitivity in the design of a logic gate device,achieving logic operations such as“AND”and“OR”.The conception of these dynamic asymmetric ion channels with mechanical sensitivity offers a straightforward,cost-effective,and versatile approach for generating ion channels,highlighting their potential application in intricate,highly integrated ionic circuits.

关键词： Carbon nanotubes fibers Mechanical response Rectification effect Ionic logic gate

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Highly Elastic,Bioresorbable Polymeric Materials for Stretchable,Transient Electronic Systems

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Nano-Micro Letters 2024年第6期16卷 1-13页

作者： Jeong‑Woong Shin Dong‑Je Kim Tae‑Min Jang Won Bae Han Joong Hoon Lee Gwan‑Jin Ko Seung Min Yang Kaveti Rajaram Sungkeun Han Heeseok Kang Jun Hyeon Lim Chan‑Hwi Eom Amay J.Bandodkar Hanul Min Suk‑Won Hwang KU‑KIST Graduate School of Converging Science and Technology Korea University145 Anam‑roSeongbuk‑guSeoul 02841Republic of Korea SK Hynix 2091Gyeongchung‑daeroBubal‑eupIcheon‑siGyeonggi‑do 17336Republic of Korea Hanwha Systems Co. Ltd.188Pangyoyeok‑roBundang‑guSeongnam‑siGyeonggi‑do 13524Republic of Korea Department of Electrical and Computer Engineering North Carolina State UniversityRaleighNC 27606USA center for Advanced Self‑Powered Systems of Integrated Sensors and Technologies(ASSIST) North Carolina State UniversityRaleighNC 27606USA Department of Integrative Energy Engineering Korea University145 Anam‑roSeongbuk‑guSeoul 02841Republic of Korea Biomaterials research center Korea Institute of Science and Technology(KIST)5 Hwarang‑ro 14‑gilSeongbuk‑guSeoul 02792Republic of Korea Semiconductor R&D center Samsung Electronics Co.Ltd.Hwaseong‑siGyeonggi‑do 18448Republic of Korea center for Advanced Biomolecular Recognition Biomedical Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea

Substrates or encapsulants in soft and stretchable formats are key components for transient,bioresorbable electronic systems;however,elastomeric polymers with desired mechanical and biochemical properties are very limited compared to nontransient ***,we introduce a bioresorbable elastomer,poly(glycolide-co-ε-caprolactone)(PGCL),that contains excellent material properties including high elongation-at-break(polymers,yields stretchable,conductive composites for degradable interconnects,sensors,and actuators,which can reliably function under external *** of device components with wireless modules demonstrates elastic,transient electronic suture system with on-demand drug delivery for rapid recovery of postsurgical wounds in soft,time-dynamic tissues.

关键词： Biodegradable elastomer Conductive polymer composites Biomedical device Transient electronics

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Evolution of Morphology and Structure During Crystallization and Melting in Syndiotactic Polypropylene

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应用化学 2001年第5期18卷 280-288页

作者： Zhi-Gang WANG Benjamin S.HSIAO Charles C.HAN State University of New York at Stony Brook Department of ChemistryStony BrookNY 11794-3400 polymers division and center for neutron research National Institute of Standards and TechnologyGaithersburgMD 20899

Structure and morphology development during isothermal crystallization and subsequent melting of syndiotactic polypropylene(sPP) was studied by time-resolved simultaneous small-angle X-ray scattering(SAXS) and wide-angle X-ray diffraction(WAXD) methods with synchrotron radiation and differential scanning calorimetry(DSC). The time and temperature dependent parameters such as long period, L , crystal lamellar thickness, l c, amorphous layer thickness, l a, scattering invariant, Q , crystallinity, X c, lateral crystal sizes, L 200 and L 020 , and unit cell parameters a and b were extracted from SAXS and WAXD profiles. Decreasing long period and crystal thickness indicate that thinner secondary crystal lamellae are formed. The decreases in unit cell parameters a and b during isothermal crystallization process suggest that crystal perfection takes place. The changes in the morphological parameters (the invariant, Q , crystallinity, X c, long period, L , and the crystal thickness, l c) during subsequent melting were found to follow a two-stage melting process, corresponding to the dual endotherm behavior in the DSC scan. We conclude that the dual melting peaks are due to the melting of secondary and primary lamellae(first peak) and the subsequent recrystallization-melting process(second peak). Additional minor endothermic peak located at the lowest temperature was also detected and might be related to melting of secondary, thinner and defective lamellae. WAXD showed that during melting, thermal expansion was greater along the b axis than that along the a axis.

关键词：间规聚丙烯结晶熔化晶体结构 DCS SAXS WAXD

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Lithium Ion Transport Environment by Molecular Vibrations in Ion-Conducting Glasses

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Energy & Environmental Materials 2024年第3期7卷 133-142页

作者： Hiroki Yamada Koji Ohara Satoshi Hiroi Atsushi Sakuda Kazutaka lkeda Takahiro Ohkubo Kengo Nakada Hirofumi Tsukasaki Hiroshi Nakajimai Laszlo Temleitner Laszlo Pusztai Shunsuke Ariga Aoto Matsuo Jiong Ding Takumi Nakano Takuya Kimura Ryo Kobayashi Takeshi Usuki Shuta Tahara Koji Amezawa Yoshitaka Tateyama Shigeo Mori Akitoshi Hayashi Diffraction and Scattering division Japan Synchrotron Radiation Research Institute(JASRI)1-1-1 KoutoSayo-choSayo-gun Hyogo 679-5198Japan Faculty of Materials for Energy Shimane University1060Nishi-Kawatsu-ChoMatsue Shimane 690-8504Japan Department of Applied Chemistry Graduate School of EngineeringOsaka Metropolitan University1-1 Gakuen-choSakaiOsaka 599-8531Japan Institute of Materials Structure Science High Energy Accelerator Research Organization(KEK)203-1 ShirakataTokai-muraNaka-gunlbaraki 319-1106Japan Graduate School of Engineering Chiba University 1-33 Yayoi-cho Inage-kuChiba 263-8522Japan Department of Materials Science Graduate School of EngineeringOsaka Metropolitan University1-1 Gakuen-choSakaiOsaka 599-8531Japan Wigner research Centre for Physics Konkoly Thegeút 29-33 H-1121Budapest Hungary International research Organisation of Advanced Science and Technology(IROAST) Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan Department of Applied Physics Nagoya Institute of TechnologyGokisoShowaNagoya 466-8555Japan Faculty of Science Yamagata University1-4-12 KojirakawaYamagata-shiYamagata 990-5860Japan Faculty of Science University of the Ryukyus1 SenbaruNishihara-choOkinawa 903-0213Japan Institute of Multidisciplinary research for Advanced Materials Tohoku University2-1-1 KatahiraAoba-kuSendai 980-8577Japan center for Green research on Energy and Environmental Materials(GREEN)and International center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)TsukubaIbaraki 305-0044Japan

Controlling Li ion transport in glasses at atomic and molecular levels is key to realizing all-solid-state batteries,a promising technology for electric *** this context,Li_(3)PS_(4)glass,a promising solid electrolyte candidate,exhibits dynamic coupling between the Li^(+)cation mobility and the PS_(4)^(3-)anion libration,which is commonly referred to as the paddlewheel *** addition,it exhibits a concerted cation diffusion effect(i.e.,a cation-cation interaction),which is regarded as the essence of high Li ion ***,the correlation between the Li^(+)ions within the glass structure can only be vaguely determined,due to the limited experimental information that can be ***,this study reports that the Li ions present in glasses can be classified by evaluating their valence oscillations via Bader analysis to topologically analyze the chemical *** is found that three types of Li ions are present in Li_(3)PS_(4)glass,and that the more mobile Li ions(i.e.,the Li3-type ions)exhibit a characteristic correlation at relatively long distances of ***,reverse Monte Carlo simulations combined with deep learning potentials that reproduce X-ray,neutron,and electron diffraction pair distribution functions showed an increase in the number of Li3-type ions for partially crystallized glass structures with improved Li ion transport *** results show order within the disorder of the Li ion distribution in the glass by a topological analysis of their ***,considering the molecular vibrations in the glass during the evaluation of the Li ion valences is expected to lead to the development of new solid electrolytes.

关键词： electrolytes ionic conductors modeling molecular dynamics

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Stereocomplexation and Mechanical Properties of Polylactide-bpoly(propylene glycol)-b-polylactide Blend Films: Effects of Polylactide Block Length and Blend Ratio

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Chinese Journal of Polymer Science 2017年第11期35卷 1391-1401页

作者： Dutchanee Pholharn Onanong Cheerarot Yodthong Baimark Biodegradable polymers research Unit Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of Science Mahasarakham University

In the present work, poly（propylene glycol）（PPG） was block copolymerized to form polylactide-poly（propylene glycol）-polylactide （PL-PPG-PL） triblock copolymers for preparing flexible stereocomplex PL （scPL） blend films. The scPL blend films were prepared by solution blending of poly（L-lactide）-PPG-poly（L-lactide）（PLL-PPG-PLL） and poly（D-lactide）- PPG-poly（D-lactide）（PDL-PPG-PDL） triblock copolymers before film casting. The influences of PL end-block lengths （2 ×10^4 and 4×10^4 g/tool） and blend ratios （75/25, 50/50 and 25/75 W/W） on the stereocomplexation and mechanical properties of the blend films were evaluated. From DSC and WAXD results, the 50/50 blend films had complete stereocomplexation. Phase separation between the scPL and PPG phases was not observed from their SEM images. The tensile stress and elongation at break increased with the sterecomplex crystallinities and PL end-block lengths. The PPG middle-blocks enhanced elongation at break of the scPL films. The results showed that the PL-PPG-PL triblock structures did not affect stereocomplexation of the PLL/PDL block blending. In conclusion, the phase compatibility and flexibility of the scPL films were improved by PPG block copolymerization.

关键词： Stereocomplex Polylactide Poly(propylene glycol) Block copolymers Mechanical properties

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Experiments and computer simulation analysis of impact behaviors of micro-sized abrasive in waterjet cutting of thin multiple layered materials

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中国有色金属学会会刊：英文版 2012年第S3期22卷 864-869页

作者： Jung-Han LEE Kang-Su PARK Myung Chang KANG Bo Sik KANG Bo Sung SHIN Engineering research center Pusan National University National Core research center Pusan National University Mechanical System Safety research division Korea Institute of Machinery and Materials

The abrasive waterjet (AWJ) is now widely used in the advanced cutting processes of polymers,metals,glass,ceramics and composite materials like thin multiple-layered material (TMM).Various research and development efforts have recently been made to understand the science of ***,the interaction mechanism between a workpiece and high-velocity abrasive particles still remains a complicated *** this work,the material removal mechanisms of AWJ such as micro penetration and micro dent were experimentally *** addition,a new computer simulation model considering high strain rate effect was proposed to understand the micro impact behavior of high-velocity micro-sized abrasives in AWJ cutting.

关键词： abrasive waterjet thin multiple layered materials micro-sized abrasive micro penetration micro dent

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