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2023 IEEE Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMC+SIPI 2023

作者： Anurakparadorn, Kanat Taub, Alan Michielssen, Eric University of Michigan Macromolecular Science and Engineering Program Department of Material Science and Engineering Ann ArborMI United States University of Michigan Department of Mechanical Engineering Ann ArborMI United States University of Michigan Department of Electrical Engineering and Computer Science Ann ArborMI United States

ISBN: (纸本)9798350309768

A strategy that combines experiment and simulation to design and optimize electromagnetic (EM) metamaterial absorbers containing a periodic porous structure is described. The approach provides the ability to produce absorbers that meet multiple user-specified objectives. Using the measured intrinsic properties of the baseline materials as an input to EM-field based computational modelling and optimization, absorption by the studied metamaterials measured by their reflection loss (RL) increases significantly. The resulting metamaterials have the potential for lower cost and lighter weight while providing greater protection than traditional metal gaskets and foams. © 2023 IEEE.

关键词： Metamaterials

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Ultrasmall,elementary and highly translational nanoparticle X-ray contrast media from amphiphilic iodinated statistical copolymers

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Acta Pharmaceutica Sinica B 2023年第4期13卷 1660-1670页

作者： Lu Su Kellie S.Dalby Hannah Luehmann Sussana A.Elkassih Sangho Cho Xun He Lisa Detering Yen-Nan Lin Nari Kang Dennis A.Moore Richard Laforest Guorong Sun Yongjian Liu Karen L.Wooley Department of Chemistry Department of Materials Science and Engineeringand Department of Chemical EngineeringTexas A&M UniversityCollege StationTX 77842USA Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems Eindhoven University of TechnologyEindhovenMB 5600The Netherlands Mallinckrodt Institute of Radiology Washington University School of MedicineSaint LouisMO 63110USA Bayer AG Creve CoeurMO 63167USA

To expand the single-dose duration over which noninvasive clinical and preclinical cancer imaging can be conducted with high sensitivity,and well-defined spatial and temporal resolutions,a facile strategy to prepare ultrasmall nanoparticulate X-ray contrast media(nano-XRCM)as dual-modality imaging agents for positron emission tomography(PET)and computed tomography(CT)has been *** from controlled copolymerization of triiodobenzoyl ethyl acrylate and oligo(ethylene oxide)acrylate monomers,the amphiphilic statistical iodocopolymers(ICPs)could directly dissolve in water to afford thermodynamically stable solutions with high aqueous iodine concentrations(>140 mg iodine/mL water)and comparable viscosities to conventional small molecule *** formation of ultrasmall iodinated nanoparticles with hydrodynamic diameters of ca.10 nm in water was confirmed by dynamic and static light scattering *** a breast cancer mouse model,in vivo biodistribution studies revealed that the64Cu-chelator-functionalized iodinated nano-XRCM exhibited extended blood residency and higher tumor accumulation compared to typical small molecule imaging ***/CT imaging of tumor over 3 days showed good correlation between PET and CT signals,while CT imaging allowed continuous observation of tumor retention even after 10 days post-injection,enabling longitudinal monitoring of tumor retention for imaging or potentially therapeutic effect after a single administration of nano-XRCM.

关键词： Amphiphilic statistical iodocopolymer CT X-ray contrast media Ultrasmall nanoassembly PET/CT Longitudinal tumor monitoring

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Synthesis and Antibacterial Activity of Selenium-functionalized Poly(ε-caprolactone)

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Chinese Journal of Polymer science 2022年第1期40卷 67-74页

作者： Ying-Ying Li Dong Xing Xiang-Qiang Pan Jian Zhu Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationState and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsDepartment of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

A selenium-functionalizedε-caprolactone was synthesized by introducing a phenyl selenide group at the 7-position.A polymer was obtained through the ring-opening polymerization of this monomer in a base/thiourea binary organocatalytic system.A living polymerization process was achieved under mild *** resulting polymers had a controlled molecular weight with a narrow molecular weight distributions and high end-group *** copolymers could be obtained by copolymerizing this monomer withε-*** thermal degradation temperature of the obtained copolymers decreased with the increasing molar ratio of selenide functionalized monomer in copolymers,while the glass transition temperature *** addition,the phenyl selenide side group could be further modified to a polyselenonium salt,which resulted in a polymer with good antibacterial *** survival rate of *** and *** was only 9%with a polymer concentration of 62.5μg/mL.

关键词： Selenium-containing polyester Polycations Antibacterial activity Degradable

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Sulfur-substitution-enhanced crystallization and crystal structure of poly(trimethylene monothiocarbonate)

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Chinese Chemical Letters 2022年第2期33卷 1021-1024页

作者： Xiaohan Cao Hongliang Wang Jialiang Yang Ruiyang Wang Xin Hong Xinghong Zhang Junting Xu Hai Wang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Center of Chemistry for Frontier Technologies Zhejiang UniversityHangzhou 310027China Department of Chemistry Zhejiang UniversityHangzhou 310027China Department of Polymer Science and Engineering College of Chemical EngineeringDalian University of TechnologyDalian 116024China

In this paper,the crystallization behavior of a novel poly(monothiocarbonate),poly(trimethylene monothiocarbonate)(PTMMTC),was investigated and compared with its polycarbonate analogue,poly(trimethylene carbonate)(PTMC).It is found that PTMMTC exhibits strong crystallizability,while un-stretched PTMC is *** and DMA results reveal that PTMMTC possesses higher glass transition temperature(T_(g))andβ-transition temperature(T_(β))than *** based on density functional theory(DFT)shows that,the bond angle of C-S-C is evidently smaller than that of C-O-C,and thus a larger dipole *** leads to the stronger intermolecular interaction and more rigid chain confor-mation in PTMMTC,which is the origin of sulfur-substitution enhanced *** crystal struc-ture of PTMMTC was preliminarily determined for the first *** has an orthorhombic crystal structure with a planar zig-zag chain *** parameters of unit cell are a=10.74 A,b=4.79 A,and c(fiber axis)=7.74 A.

关键词： Poly(monothiocarbonate) Polycarbonate Crystallization behavior Crystal structure Sulfur substitution enhanced crystallization

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Nano-enhanced potassium biostimulants: augmenting wheat yield, antioxidant activity, and micronutrient bioavailability in arid agricultural systems

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Nanotechnology for Environmental engineering 2025年第2期10卷 1-14页

作者： Shahryari, Ali Esmaeilzadeh Bahabadi, Sedigheh Beyzaei, Hamid Mohammadi, Yasaman Nusrat, Easmin Sharifan, Hamidreza Department of Biology Faculty of Basic Sciences University of Zabol Zabol Iran Department of Chemistry Faculty of Basic Sciences University of Zabol Zabol Iran Environmental Science and Engineering Program University of Texas at El Paso El PasoTX United States Department of Chemistry and Biochemistry University of Texas at El Paso El PasoTX United States

The development of agricultural biostimulants (BS) has marked a significant advancement in bolstering crop resilience against environmental stressors. This study investigates synthesizing and applying six novel nano-based potassium (K)-enriched biostimulants that enhance micronutrient availability, nitrogen uptake, and subsequent plant growth during seed germination and developmental phases. Using Nuclear Magnetic Resonance (NMR) and Fourier-transform infrared Spectroscopy (FTIR), the synthesized biostimulants were characterized before their application in soil-supporting wheat (Triticum aestivum L.) cultivation. The biostimulants’ effects at three concentrations (0.1, 0.2, and 0.5 mmol) and were evaluated on physiological and biomolecular parameters. To assess nutrient availability, soil mineral content was analyzed via X-ray Photoelectron Spectroscopy (XPS). An increase in biostimulant concentration led to a marked rise in seed germination rates, correlating with elevated bioavailability of nitrates, ammonia, sulfur, potassium, and other key micronutrients. At a threshold concentration of 0.2 mmol, a notable improvement in the bioavailability of nutrients and a significant increase in the total phenol and flavonoid content was observed. The phenolic content was measured using the Folin-Ciocalteu method and expressed as Gallic Acid Equivalents (GAE), while flavonoids were quantified based on quercetin equivalents. These phytochemicals were correlated with enhanced antioxidant activities, measured using the Ferric Reducing Antioxidant Power (FRAP) assay. The results indicated an 80% increase in antioxidant capacity, particularly for biostimulant BS6 at the 0.2 mmol concentration. Furthermore, biostimulants demonstrated a positive effect on the elongation of radicles and plumules, contributing to improved plant vigor. Overall, the study highlights the potential of synthesized K-based biostimulants to significantly enhance crop productivity, nutrient uptake, and antio

关键词： Fourier transform infrared spectroscopy

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Self-assembly behavior of disaccharide-containing supra-amphiphiles

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Chinese Chemical Letters 2023年第1期34卷 373-377页

作者： Zhenfei Gao Tiannan Wang Zikun Rao Hui Yan Ran Zhang Guosong Chen The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan UniversityShanghai 200433China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China School of Pharmaceutical Sciences Liaocheng UniversityLiaocheng 252059China

In this paper,supra-amphiphilic compounds containing disaccharides and azobenzene ends have been constructed via dynamic covalent *** was found that the slight structural difference of the disaccharides made significant difference in the self-assembled ***,three kinds of azodisaccharide supra-amphiphiles were found to assemble into different morphologies,with the only difference in chemical structure from the *** importantly,the structural difference between the disaccharides,including lactoside,maltoside and cellobioside was *** simulation revealed the packing of molecules was due to the different contribution from hydrogen *** above results clearly indicated the contribution of saccharide packing,especially the related hydrogen bonding,to the final morphology of the assembled structures.

关键词： Supra-amphiphile Disaccharide Self-assembly Dynamic covalent bond Molecular dynamics simulation

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Ultrastable supported oxygen evolution electrocatalyst formed by ripening-induced embedding

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science (New York, N.Y.) 2025年第6735期387卷 791-796页

作者： Shi, Wenjuan Shen, Tonghao Xing, Chengkun Sun, Kai Yan, Qisheng Niu, Wenzhe Yang, Xiao Li, Jingjing Wei, Chenyang Wang, Ruijie Fu, Shuqing Yang, Yong Xue, Liangyao Chen, Junfeng Cui, Shiwen Hu, Xiaoyue Xie, Ke Xu, Xin Duan, Sai Xu, Yifei Zhang, Bo State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai China Collaborative Innovation Center of Chemistry for Energy Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials MOE Key Laboratory of Computational Physical Sciences Department of Chemistry Fudan University Shanghai China Department of Chemistry and Department of Electrical and Computer Engineering Northwestern University Evanston IL United States Hefei National Laboratory Hefei China

The future deployment of terawatt-scale proton exchange membrane water electrolyzer (PEMWE) technology necessitates development of an efficient oxygen evolution catalyst with low cost and long lifetime. Currently, the stability of the most active iridium (Ir) catalysts is impaired by dissolution, redeposition, detachment, and agglomeration of Ir species. Here we present a ripening-induced embedding strategy that securely embeds the Ir catalyst in a cerium oxide support. Cryogenic electron tomography and all-atom kinetic Monte Carlo simulations reveal that synchronizing the growth rate of the support with the nucleation rate of Ir, regulated by sonication, is pivotal for successful synthesis. A PEMWE using this catalyst achieves a cell voltage of 1.72 volts at a current density of 3 amperes per square centimeter with an Ir loading of just 0.3 milligrams per square centimeter and a voltage degradation rate of 1.33 microvolts per hour, as demonstrated by a 6000-hour accelerated aging test.

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MXene:From synthesis to environment remediation

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Chinese Journal of Chemical engineering 2023年第9期61卷 260-280页

作者： Ali Nikkhah Hasan Nikkhah Hadis langari Alireza Nouri Abdul Wahab Mohammad Ang Wei Lun Ng law Yong Rosiah Rohani Ebrahim Mahmoudi Department of Chemical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Department of Mechanical and Aerospace Engineering University at BuffaloBuffaloUSA Department of Chemical and Biomolecular Engineering University of ConnecticutStorrsUSA Department of Chemistry and Medicinal Chemistry University at BuffaloBuffaloUSA Chemical and Water Desalination Engineering Program College of EngineeringUniversity of SharjahSharjah 27272United Arab Emirates Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongKajangSelangorMalaysia

A new burgeoning family of two-dimensional(2D)transition metal carbides/nitrides,better known as MXenes,have received extensive attention because of their distinct properties,such as metallic conductivity,good hydrophilicity,large surface area,good mechanical stability,and *** 40 different MXenes have been synthesized,and dozens more structures and properties have been theoretically ***,the recent progress in MXenes development is not well covered in chronological order based on different *** review article focuses on emerging synthesis methods,the properties of MXenes,and mainly the applications of MXenes and MXene-based material family in environmental remediation,a comprehensive review of gaseous and aqueous pollutants treatment.

关键词： MXene 2D materials Wastewater treatment CO_(2)capture Adsorption Photodegradation

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A nitric oxide-triggered hydrolysis reaction to construct controlled self-assemblies with complex topologies

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science China chemistry 2024年第4期67卷 1289-1299页

作者： Wenzhuo Chen Yuping Tang Shuai Chen Zipei Chen Jia He Hongbin Huo Juan Zhang Jiajia Li Fei Yan Wei Tian Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs ResearchCollege of PharmacyShaanxi University of Chinese MedicineXianyang 712046China Shaanxi Key Laboratory of Macromolecular Science and Technology Xi’an Key Laboratory of Hybrid Luminescent Materials and Photonic DeviceMOE Key Laboratory of Material Physics and Chemistry under Extraordinary ConditionsSchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Polymeric Materials School of Materials Science and EngineeringTongji UniversityShanghai 201804China

Hydrolysis reactions are capable of directing the non-equilibrium assembly of biomolecular scaffolds to realize sophisticated structures and functions in natural ***,utilizing the proper hydrolysis reactions to construct controlled assemblies with complex topologies is still an arduous challenge in artificial systems and needs to be ***,we report a nitric oxide(NO)-triggered slow hydrolysis strategy for the controlled construction of biomimetic supramolecular toroids(STs),thus realizing their visualization of intermediate structures and regulation of geometry *** presented protocol harnesses hydrolysis reactions to control of non-equilibrium self-assembly processes for the construction of self-assemblies with complex topologies successfully,which sheds light on how the hydrolysis reaction rate can modulate the kinetic pathway of assembly,thus realizing the artificial establishment of bio-inspired hierarchical structures.

关键词： supramolecular toroids controlled self-assembly nitic oxide-triggered hydrolysis pathway regulation

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Healing the degradable organic–inorganic heterointerface for highly efficient and stable organic solar cells

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InfoMat 2022年第2期4卷 162-170页

作者： Yangdan Tao Haoran Liu Di Wang Feng Zhao Zeng Chen Haiming Zhu Hongzheng Chen Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouChina Department of Chemistry Zhejiang UniversityHangzhouChina

The heterointerface between the contacted organic and inorganic semiconductors critically affects the charge extraction,hence overall performance of organic optoelectronics,especially for organic solar cells(OSCs).Herein,we develop an effective interfacial strategy that simultaneously boosts the chemical,electric,and electronic properties of the organic–inorganic heterointerface of the derived OSCs,through implanting conjugated molecules as selfassemble monolayers(SAMs)to metal oxide nanoparticles(MO NPs).As results,SAM passivated zinc oxide nanoparticles(ZnO NPs)as electron transport layers(ETLs)not only enable the best performed OSCs containing MO ETLs,but also exhibit the most desirable thickness insensitive features(up to 300 nm).In addition,SAM-ZnO ETLs help also substantially improving the photostability of the derived ***,this work can be beneficial to the further development of high-performance and cost-effective OSCs.

关键词： charge extraction organic-inorganic heterointerface organic solar cells photostability

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