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Broadband achromatic metalens design based on artificial neural network

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Broadband achromatic metalens design based on artificial neu...

CLEO: QELS_Fundamental Science, QELS 2022

作者： Wang, Feilou Geng, Guangzhou Wang, Xueqian Li, Junjie Bai, Yang Li, Jianqiang Wen, Yongzheng Li, Bo Sun, Jingbo Zhou, Ji State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China CAS Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Tsinghua Shenzhen International Graduate School Shenzhen518055 China

We used the backpropagation neural network to design a high performance achromatic metalens at visible range. Experimental demonstration showed that the fabricated achromatic metalens can operate from 420 to 640 nm wi... 详细信息

ISBN: (纸本)9781557528209

关键词： Neural networks

Recent advances in chemical protein synthesis:method developments and biological applications

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Science China Chemistry 2024年第4期67卷 1060-1096页

作者： Suwei Dong Ji-Shen Zheng Yiming Li Huan Wang Gong Chen Yongxiang Chen Gemin Fang Jun Guo Chunmao He Honggang Hu Xuechen Li Yanmei Li Zigang Li Man Pan Shan Tang Changlin Tian Ping Wang Bian Wu Chuanliu Wu Junfeng Zhao Lei Liu State Key Laboratory of Natural and Biomimetic Drugs and School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Division of Life Sciences and Medicine University of Science and Technology of ChinaHefei 230027China School of Food and Biological Engineering Engineering Research Center of Bio-processMinistry of EducationHefei University of TechnologyHefei 230009China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Department of Chemistry Tsinghua UniversityBeijing 100084China Institute of Health Sciences Anhui UniversityHefei 230601China College of Chemistry Central China Normal UniversityWuhan 430079China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China School of Medicine or Institute of Translational Medicine Shanghai UniversityShanghai 200444China Department of Chemistry The University of Hong KongHong Kong 999077China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Life Sciences University of Science and Technology of ChinaHefei 230026China Department of Chemical Biology Shanghai Jiao Tong UniversityShanghai 200240China Institute of Microbiology Chinese Academy of SciencesBeijing 100101China Department of Chemistry Xiamen UniversityXiamen 361005China School of Pharmaceutical Science Guangzhou Medical UniversityGuangzhou 511436China

The central dogma of modern biology underscores the pivotal roles proteins play in diverse biological processes,the study of which necessitates advanced methods to produce proteins with precision and *** protein synthesis,a powerful approach utilizing chemical reactions for the de novo construction of structurally accurate proteins,has emerged as a transformative tool for studying proteins and generating protein derivatives/mimics inaccessible by natural biological machinery,including post-translationally modified proteins,proteins comprised of unnatural amino acids,as well as mirror-image *** review summarizes recent strides in synthetic method developments for chemical protein synthesis,including innovative techniques in solid-phase peptide synthesis,the challenges presented by difficult sequences in either synthesis or folding and the exploration of novel ligation reactions using both chemical and enzymatic ***,the review also delves into newly developed protocols for site-selective protein modifications and the generation of stapled or macrocyclized peptides/miniproteins,highlighting the power of chemical methods to make structurally diverse *** applications of synthetic proteins in investigating post-translational modifications(phosphorylation,lipidation,glycosylation,ubiquitination,etc.),mirror-image biological processes and drug development are further ***,these topics provide a comprehensive overview of the current landscape of chemical protein synthesis.

关键词： chemical protein synthesis solid-phase peptide synthesis ligation reactions post-translational modifications mirror-image proteins peptide drugs

Quaternary Ammonium Cof-Based Proton Exchange Membranes for Enhanced Electrochemical Hydrogen Compression

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SSRN 2025年

作者： Pang, Xiao Liu, Ziwen Xu, Shuting Lv, Kexin Shi, Benbing Dong, Xu Xing, Na Gao, Zhong Zhu, Shiyi Zhang, Leilang Yao, Zengguang Cheng, Lijuan Wang, Hui Xu, Kai Liu, Yawei Wu, Hong Jiang, Zhongyi Key Laboratory for Green Chemical Technology Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin300072 China Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment Zhejiang Institute Tianjin University Zhejiang Ningbo315201 China State Key Laboratory of Synthetic Biology Tianjin University Tianjin300072 China Beijing Key Laboratory of Ionic LiquidsClean Process CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China MOE Key Laboratory of Bioorganic NST Phosphorous Chemistry and Chemical Biology Department of Chemistry Tsinghua University Beijing100084 China

Proton exchange membranes (PEMs) with high proton conductivity, excellent mechanical strength, and minimal hydrogen crossover are crucial for the practical implementation of electrochemical hydrogen energy conversion devices, including electrochemical hydrogen compression (EHC). Herein, hydrazone-linked ionic covalent organic frameworks (iCOF) bearing quaternary ammonium (QA) groups were synthesized and introduced into the sulfonated poly (ether ether ketone) (SPEEK) matrix to fabricate hybrid PEMs. Among them, the orderly arrangement of QA and -NH- groups on iCOF not only rearranged the distribution of -SO3H groups in the SPEEK polymer matrix, increasing the continuity and connectivity of the proton conduction pathways but also formed acid-base pairs with -SO3H groups to facilitate proton dissociation. Additionally, the electrostatic and hydrogen bonding interactions formed between iCOF and SPEEK matrix optimized the microphase separation structure and enhanced the mechanical stability of membranes. As a result, the hybrid PEMs exhibited an enhanced proton conductivity of 469.0 mS cm-1 (80°C, 100% RH) with only 2 wt% iCOF content, high mechanical strength of 91.3 MPa, and superior EHC performance with a high outlet pressure of 3.31 MPa (30°C, 100% RH) and high-purity hydrogen (>99.9%) from a 40% hydrogen-nitrogen mixture. © 2025, The Authors. All rights reserved.

关键词： Hydrogen bonds

3D Printing of Tough Hydrogel Scaffolds with Functional Surface Structures for Tissue Regeneration

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Nano-Micro Letters 2025年第2期17卷 18-45页

作者： Ke Yao Gaoying Hong Ximin Yuan Weicheng Kong Pengcheng Xia Yuanrong Li Yuewei Chen Nian Liu Jing He Jue Shi Zihe Hu Yanyan Zhou Zhijian Xie Yong He State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Liangzhu Laboratory Zhejiang UniversityHangzhou 310027People’s Republic of China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Stomatology Hospital School of StomatologyZhejiang University School of MedicineHangzhou 310027People’s Republic of China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001People’s Republic of China Institute of Digital Medicine Nanjing First HospitalNanjing Medical UniversityNanjing 210006People’s Republic of China

Hydrogel scaffolds have numerous potential applications in the tissue engineering ***,tough hydrogel scaffolds implanted in vivo are seldom reported because it is difficult to balance biocompatibility and high mechanical *** by Chinese ramen,we propose a universal fabricating method(printing-P,training-T,cross-linking-C,PTC&PCT)for tough hydrogel scaffolds to fill this ***,3D printing fabricates a hydrogel scaffold with desired structures(P).Then,the scaffold could have extraordinarily high mechanical properties and functional surface structure by cycle mechanical training with salting-out assistance(T).Finally,the training results are fixed by photo-cross-linking processing(C).The tough gelatin hydrogel scaffolds exhibit excellent tensile strength of 6.66 MPa(622-fold untreated)and have excellent ***,this scaffold possesses functional surface structures from nanometer to micron to millimeter,which can efficiently induce directional cell ***,this strategy can produce bionic human tissue with mechanical properties of 10 kPa-10 MPa by changing the type of salt,and many hydrogels,such as gelatin and silk,could be improved with PTC or PCT *** experiments show that this scaffold can effectively promote the new generation of muscle fibers,blood vessels,and nerves within 4 weeks,prompting the rapid regeneration of large-volume muscle loss injuries.

关键词： 3D printing Tough hydrogel scaffold Functional surface structure Tissue regeneration Biomaterials

Green Synthesis of Multifunctional Cellulose-Based Eutectogel Using a Metal Salt Hydrate-Based Deep Eutectic Solvent for Sustainable Self-Powered Sensing

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SSRN 2024年

作者： Zhu, Jiaxuan Shao, Changyou Hao, Sanwei Xue, Kai Zhang, Jifei Sun, Zhiwen Xiao, Ling-Ping Ren, Wenfeng Yang, Jun Cao, Bobo Sun, Runcang Liaoning Key Laboratory of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery College of Light Industry and Chemical Engineering Dalian Polytechnic University Dalian116034 China School of Materials Science and Engineering Shandong University of Technology Zibo255000 China Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University Beijing100190 China Beijing Forestry University China Tsinghua University China

Renewable cellulose biopolymers offer a promising alternative to petroleum-derived synthetic polymers for preparing advanced eutectogel materials in sustainable electronics. However, it remains a great challenge for the efficient dissolution of cellulose and subsequent green synthesis of polymer gel networks in a green and sustainable manner. Herein, we propose a one-pot strategy in a green deep eutectic solvents (DES) system which simultaneously enable to efficiently dissolve cellulose and proceed sunlight-induced photopolymerization into eutectogel without the need for cross-linking agents or initiators. This DES system is comprised of zinc chloride (ZnCl2) hydrate as the hydrogen bond acceptor and acrylic acid (AA) as the donor, facilitating the dissolution of cellulose by breaking the hydrogen bonds within cellulose chains. Importantly, the subsequent in-situ photopolymerized cellulose eutectogel yeilds superior fracture strength (14 MPa), large fracture strain (980%), high toughness (65 MJ m-3), and self-healing properties. Additionally, the incorporation of an inorganic salt imparts the high conductivity and significant freeze resistance (-50 °C) to the eutectogel, which is applicable to be a soft electrode in triboelectric nanogenerator (TENG) for wireless motion detection and human–computer interaction control. This work sheds light on the rational design of advanced stretchable conductive biopolymer materials in sustainable and self-powered wearable electronics. © 2024, The Authors. All rights reserved.

关键词： Zinc chloride

Sustainable Coal Gangue − Based Silicon Fertilizer: Energy − Efficient Preparation, Performance Optimization and Conversion Mechanism

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SSRN 2024年

作者： Li, Tinggang Zhang, Hualin Jiang, Xiaoliang Li, Qiong Yang, Youming CAS Key Laboratory of Green Process and Engineering National Engineering Research Center of Green Recycling for Strategic Metal Resources Innovation Academy for Green Manufacture Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory of Rare Earths Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341119 China School of Metallurgical engineering Jiangxi University of Science and Technology Ganzhou341099 China School of Rare Earths University of Science and Technology of China Hefei230026 China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Coal gangue, a typical industrial waste with low resource utilization, paradoxically stands as an ideal raw material for silicon fertilizer preparation because of its high silicon content. This study investigated the preparation mechanisms of coal gangue−based silicon fertilizers, emphasizing the impact of various carbonate additives on the effective silicon content. The experimental results demonstrated that the addition of 20% commercial Na2CO3, followed by roasting at 700°C for 2 h, resulted in a silicon fertilizer with an effective silicon content of 22.63%. Moreover, through material characterization and energy cost budgeting of coal gangue, the study revealed that Na2CO3 offered notable advantages in both economic viability and energy efficiency. Activation energy experiments, HSC and DFT revealed that Na2CO3 preferentially decomposed to generate O2−, which broke the Si−O bond and significantly improved the release and conversion efficiency of effective silicon. This study offered theoretical support and practical guidance for the efficient utilization of coal gangue resources, highlighting its considerable industrial application value and potential for promoting sustainable agricultural and industrial development. © 2024, The Authors. All rights reserved.

关键词： Coal tailings

Ionic Effect Enhanced the Adsorption of Phosphorus-Containing Organics from Complex Wastewater

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SSRN 2025年

作者： Li, Zhiqiang Wang, Rongyue Jia, Wenting Ning, Pengge Cao, Hongbin State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100049 China Chemistry and Chemical Engineering Data Center Chinese Academy of Sciences Beijing100049 China National Engineering Research Center of Green Recycling for Strategic Metal Resources Chinese Academy of Sciences Beijing100049 China Institute of Process Engineering Chinese Academy of Science Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Achieving the complete adsorption of phosphorus-containing organics from the complex wastewater generated during the recycling process of waste batteries is a critical environment challenge. The research findings of this work reveal that in complex solution systems, ions can significantly alter the hydrophilicity or structural morphology of phosphorus-containing organic compounds, thereby influencing their adsorption efficacy. Based on these insights, an innovative adsorption strategy based on ion-regulation was proposed for the complete removal of phosphorus-containing organics from complex wastewater. By precisely modulating the concentration of H3O+ ions within actual cobalt extraction wastewater prior to the adsorption process, we achieved a removal rate exceeding 99.98% for phosphorus-containing organics. This breakthrough offers innovative perspectives for the comprehensive removal of organic pollutants in complex wastewaters within the waste battery recycling sector and provides important guarantees for the industry’s environmental health and sustainable development. © 2025, The Authors. All rights reserved.

关键词： Sustainable development

Gram-Scale Synthesis of Unsupported Pt-Rare Earth Nanosponge for Enhanced Stability in Proton Exchange Membrane Fuel Cells

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SSRN 2025年

作者： Li, Chenhao Wang, Hao Qian, Fangren Li, Siming Sang, Qinqin Chen, Qingjun Liao, Jialiang Zhu, Yihan Liu, Yanrong Zhang, Suojiang Li, Yawei Beijing Key Laboratory of Ionic Liquids Clean Process China School of Rare Earths University of Science and Technology of China Hefei230026 China Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341119 China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Mesoscience and Engineering Beijing Key Laboratory of Solid State Battery and Energy Storage Process Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Longzihu New Energy Laboratory School of Energy Science and Technology Henan University Zhengzhou450000 China School of Chemistry and Chemical Engineering Shanxi University Taiyuan China Center for Electron Microscopy Institute for Frontier and Interdisciplinary Sciences State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical Engineering Zhejiang University of Technology Hangzhou China Shanxi University China

Durability is crucial for proton exchange membrane fuel cells (PEMFCs), but the current preferred catalyst, Pt/C, suffers from carbon corrosion and Pt detachment during cycling. In this work, we facilely synthesized carbon-free, unsupported PtLa catalysts on a gram-scale via arc melting coupled with a suction casting process, followed by a dealloying treatment. The resulting PtLa catalysts possess a nanosponge morphology, facilitating mass transport paths for the oxygen reduction reaction. In a PEM single cell, the nanosponge structure demonstrates high utilization of ionomers and proton conductivity with a minimal ionomer loading, and exhibits enhanced activity in the rated voltage region. A mass activity of 0.50 A mgPt-1 is achieved for the nanosponge PtLa-3 (NSPL-3), which is 2.9-fold greater than that of Pt/C (0.17 A mgPt-1), with 94.8% voltage retention and only 22.0% MA loss after 20,000 cyclic durability tests. The high activity retention of NSPL-3 is attributed to the high retention of its nanosponge-like structure, which maintains excellent connectivity between the active sites and leaves sufficient channels for mass transport. This approach holds the potential to propel fuel cell technology forward by providing a cost-effective and robust catalyst alternative. © 2025, The Authors. All rights reserved.

关键词： Dealloying

Freestanding strontium vanadate/carbon nanotube films for long-life aqueous zinc-ion batteries

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Rare Metals 2022年第2期41卷 415-424页

作者： Ye-Hong Du Xian-Yu Liu Xin-Yu Wang Jun-Cai Sun Qiong-Qiong Lu Jian-Zhi Wang Ahmad Omar Daria Mikhailova Institute of Materials and Technology Dalian Maritime UniversityDalian 116026China e-mail:wangxinyu@*** School of Chemistry and Chemical Engineering Lanzhou City UniversityLanzhou 730070China Leibniz Institute for Solid State and Materials Research(IFW)Dresden E.V Helmholtzstraße 2001069 DresdenGermany e-mail:q.lu@ifw-dresden.de Key Laboratory for Green Chemical Process of Ministry of Education School of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhan 430205China

Aqueous rechargeable zinc-ion battery(ZIB)is considered to be a potential energy storage system for large-scale applications due to its environmental friendliness,high safety,and low ***,it remains challenging to develop suitable cathode materials with high specific capacity and long-term cyclic ***,we have fabricated freestanding Sr0.19V2O51.3H2O/carbon nanotubes(SrVO/CNTs)composite films with different mass ratios by incorporating SrVO into CNTs *** synthesized SrVO possesses a large interlayer spacing of 1.31 nm,which facilitates Zn(2+)***,the SrVO/CNTs composite film with conductive network structure promotes electron transfer and ensures good contact between SrVO and CNTs during the long-term cycling *** a result,the battery based on the SrVO/CNTs composite cathode with a mass ratio of 7:3 delivers a specific capacity of 326 mAh·g^(-1)at 0.1 A·g^(-1)and 145 mAh·g^(-1)at 5 A·g^(-1),demonstrating a high capacity and excellent rate ***,the assembled ZIB shows good capacity retention of 91%even after ultra-long cycling for 7500 cycles at a high current rate of 5 Ag^(-1).More importantly,the battery also delivers a high energy density and power density,as 290 Wh·kg^(-1)at 125 W·kg^(-1)(0.1 A·g^(-1)),or 115 Wh·kg^(-1)at 6078 W·kg^(-1)(5 Ag^(-1)).The results demonstrate that the SrVO/CNTs composite is a promising cathode toward large-scale energy storage applications.

关键词： Aqueous zinc-ion battery Strontium vanadate Carbon nanotubes network Freestanding composite film Long cycle life