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A passive wireless surface acoustic wave(SAW)sensor system for detecting warfare agents based on fluoroalcohol polysiloxane film

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Microsystems & Nanoengineering 2024年第1期10卷 67-78页

作者： Yong Pan Cancan Yan Xu Gao Junchao Yang Tengxiao Guo Lin Zhang Wen Wang State Key Laboratory of NBC Protection for Civil Beijing 102205China Institute of Acoustics Chinese Academy of SciencesBeijing 100190China The School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

Long-term monitoring of environmental warfare agengts is a challenge for chemical gas *** address this issue,we developed a 433 MHz passive wireless surface acoustic wave(WSAW)gas sensor for dimethyl methylphosphonate(DMMP)*** WSAW gas sensor includes a YZ lithium niobate(LiNbO_(3))substrate with metallic interdigital transducers(IDTs)etched on it,and an antenna was placed near the IDT.A DMMP-sensitive viscoelastic polymer fluoroalcoholpolysiloxane(SXFA)film was prepared on a LiNbO_(3) substrate,and mode modeling coupling was used to optimize the design *** sensor can function properly in an environments between−30℃ and 100℃ with humidity less than 60%*** the wireless transmission distance was within the range of 0-90 cm,the sensor noise increased with distance,and the stability was less than 32°/*** optimizing the film thickness of SXFA,a relationship was observed between sensor sensitivity and film *** the film thickness of SXFA reached 450 nm,the optimal value was *** a distance of 20 cm between the transmitting and receiving antennas,DMMP was detected at different concentrations with the developed WSAW gas *** lower detection limit of DMMP was 0.48 mg/m^(3),the sensitivity of the sensor was 4.63°/(mg/m^(3)),and repeatable performance of the sensor was confirmed.

关键词： film alcohol passive

Prediction of chemical short-range order in high-/medium-entropy alloys

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Journal of Materials Science & Technology 2024年第2期169卷 115-123页

作者： Pei-Yu Cao Jing Wang Ping Jiang Yun-Jiang Wang Fu-Ping Yuan Xiao-Lei Wu State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of ScienceBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Chemical short-range orders(CSROs),as the built-in sub-nanoscale entities in a high-/medium-entropy alloy(H/MEA),have aroused an ever-increasing *** multi-principal elements in an H/MEA to form a complex concentrated solution,a variety of sub-systems of species exist to induce the metastable ordered compounds as candidates for ultimate *** issues remain pending on the origin of CSROs as to how to judge if CSRO will form in an H/MEA and particularly,what kind of CSROs would be stably produced if there were multiple ***,the first-principles method,along with the proposed local formation energy calculation in allusion to the atomic-scale chemical heterogeneities,is used to predict the CSRO formation based on the mechanical stability,thermodynamic formation energy,and electronic *** simulations are detailed in an equiatomic ternary VCoNi MEA with three kinds of potential compounds,i.e.,L1_(1),L1_(2),and B2,in the face-centered cubic *** turns out that L1_(1)is stable but hard to grow up so as to become the final CSRO.L1_(1)is further predicted as CSROs in CrCoNi,but unable to form in FeCoNi and CrMnFeCoNi *** predictions are consistent with the experimental *** findings shed light on understanding the formation of *** method is applicable to other H/MEAs to design and tailor CSROs by tuning chemical species/contents and thermal processing for high performance.

关键词： Short-range order High-entropy alloy Microstructure First-principles calculation Gibbs free energy Local electronic density of states

Lanthanide atoms doped arsenene monolayer:Enhanced magnetic anisotropies,huge magnetic moments and significant strain-modulated effects

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Journal of Rare Earths 2024年第11期42卷 2137-2149页

作者： Yuping Tian Chaobo Wang Jiaxing Duan Binyuan Zhang Lianlian Zhang Weijiang Gong College of Sciences Northeastern University

Employing the spin-polarized density functional theory（DFT）,we investigated the magnetic and optical properties of buckled arsenene（β-As） after doping a whole series of lanthanide（Ln） *** results demonstrate that Ln atoms can be stably doped into the single layer *** doping Ln atoms,La,Ce,Pr,Nd,Gd,Dy and Lu@arsenene behave dilute magnetic semiconductor（DMS） properties,while the Pm,Sm,Eu,Ho,Er and Tm@arsenene show half metallic *** of Ln@arsenene systems favor the long-range ferromagnetic *** maximum of Ln-doped systems' magnetic moments and magnetic anisotropy energy（MAE） can reach 8 μBand 7.48 meV,*** doping of Ln atoms into arsenene improves the optical responses in visible and infrared *** can alter the magnetic coupling between Sm and the neighboring As atoms and reduce the system's magnetic ***,strain can improve the MAE of these systems,accompanied by the change of the easy magnetization of Sm@***,compressive and tensile strains effectively improve the optical responses in visible and ultraviolet region,*** on the obtained results,we believe that the Ln@arsenene monolayer has application prospects in photoelectronics and spintronics such as high-density memory devices.

关键词： Arsenene Magnetic properties Optical properties Rare earths

Emerging microfluidics for the modeling and treatment of arthritis

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Engineered regeneration 2024年第2期5卷 153-169页

作者： Nengjie Yang Chi Sun Chen Dong Yuting Huang Yujuan Zhu Zhifeng Gu Department of Rheumatology Research Center of ImmunologyAffiliated Hospital of Nantong UniversityMedical School of Nantong UniversityNantong 226001China Department of Geriatrics Affiliated Hospital of Nantong UniversityNantong UniversityNantong 226001China Department of Dermatology Affiliated Hospital of Nantong UniversityMedical School of Nantong UniversityNantong 226001China research Center of Clinical Medicine Research Center of ImmunologyAffiliated Hospital of Nantong UniversityNantong 226001China

Microfluidic is a technology that allows the precise control of fluid in a *** its advantages of high throughput and low cost,microfluidic technology has achieved good performance in various fields in recent *** is a general term for a variety of joint diseases,which can be clinically manifested as joint pain and swelling,seriously affecting people’s physical and mental *** present,the causes of arthritis disease are still unknown,and existing disease models and treatment methods are still limited,so more treatments need to be *** organ chip is a cutting-edge technology to build a bionic human organ model,which can reflect the structure and function characteristics of human organs by simulating the physiological environment of tissues and cells in *** paper reviews the application of microfluidic technology in the modeling and treatment of arthritis,hoping to open up a new vision for the study of arthritis.

关键词： Microfluidics Arthritis Organ on a chip Drug delivery system Drug screening

How can the holder trust the verifier?A CP-ABPre-based solution to control the access to claims in a Self-Sovereign-Identity scenario

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Blockchain(research and Applications) 2024年第3期5卷 22-41页

作者： Francesco Buccafurri Vincenzo De Angelis Roberto Nardone University of reggio Calabria 89124 Reggio CalabriaItaly University of Calabria 87036 Arcavacata di Rende(CS)Italy University of Naples“Parthenope” 80143 NaplesItaly

The interest in Self-Sovereign Identity(SSI)in research,industry,and governments is rapidly *** is a paradigm where users hold their identity and credentials issued by authorized *** is revolutionizing the concept of digital identity and enabling the definition of a trust framework wherein a service provider(verifier)validates the claims presented by a user(holder)for accessing ***,current SSI solutions primarily focus on the presentation and verification of claims,overlooking a dual aspect:ensuring that the verifier is authorized to access the holder’s *** this gap,this paper introduces an innovative SSI-based solution that integrates decentralized wallets with Ciphertext-Policy Attribute-Based Proxy re-Encryption(CP-ABPre).This combination effectively addresses the challenge of verifier *** solution,implemented on the Ethereum platform,enhances accountability by notarizing key operations through a smart *** paper also offers a prototype demonstrating the practicality of the proposed ***,it provides an extensive evaluation of the solution’s performance,emphasizing its feasibility and efficiency in real-world applications.

关键词： Blockchain IPFS Self Sovereign Identity Smart contract Access control

碱金属阳离子在外加电位下影响单分散铜氮掺杂碳材料催化二氧化碳电还原的机理研究

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Chinese Journal of Chemical Physics 2024年第1期37卷 100-108,I0093-I0102,I0118页

作者：赵刚张国桢中国科学技术大学化学与材料科学学院合肥230026 中国科学技术大学未来技术学院合肥230026 中国科学技术大学合肥微尺度物质科学国家研究中心合肥230026

单分散铜氮掺杂碳材料是一类很有希望的二氧化碳电还原催化剂.然而,铜位点周围电极-电解质界面的复杂环境阻碍了人们对该体系机理的全面认识以及在机理基础上的系统性优化.本文建立了一个电双层模型来研究在有外加电位条件下碱金属阳离... 详细信息

单分散铜氮掺杂碳材料是一类很有希望的二氧化碳电还原催化剂.然而,铜位点周围电极-电解质界面的复杂环境阻碍了人们对该体系机理的全面认识以及在机理基础上的系统性优化.本文建立了一个电双层模型来研究在有外加电位条件下碱金属阳离子对单分散铜氮掺杂碳催化剂表面二氧化碳电还原的影响.巨正则系综密度泛函理论计算表明,在相对标准氢电极电势1.2 V的条件下,水合钠离子促进了CO_(2)在Cu位点上的电吸附,使其形成弯曲的二氧化碳负离子;而在足够负的电势条件下,CO_(2)的电吸附(Cu+CO_(2)+e-→Cu-CO_(2)-)而非羧基形成步骤,是钠离子协助下CO_(2)还原为CO反应的决速步.此外,铜与带负电的羧基结合形成类似碳酸氢根的结构,或得益于单价Cu的d10电子构型.研究表明,碱金属阳离子在单分散铜氮掺杂碳上二氧化碳电还原的早期阶段发挥了关键作用,而且恒电势条件的模拟对理解反应机理非常重要.

关键词：阳离子效应二氧化碳电还原恒电势方法第一性原理计算

Heterogeneous photocatalytic methanol oxidation coupled with oxygen reduction toward pyrimidines synthesis

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Science Bulletin 2024年第16期69卷 2496-2500页

作者： Hongru Wu Jie Wang Hongli Sun Haochuan Jing Zhenyuan Teng Wei Ou Zhaofei Zhang Yangsen Xu Bin Liu Chenliang Su Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China Department of Materials Science and Engineering City University of Hong KongKowloon 999007China

Pyrimidines and their derivatives are widely found in natural products,agrochemicals,and pharmaceutical compounds,such as osimertinib,tofacitinnib,nilotinib,and fluoxastrobin(Fig.S1 online)[1].Considering their signif... 详细信息

关键词： pyrimidine methanol synthesis

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碱金属阳离子在外加电位下影响单分散铜氮掺杂碳材料催化二氧化碳电还原的机理研究（英文）

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Chinese Journal of Chemical Physics 2024年第1期 100-118页

作者：赵刚张国桢中国科学技术大学化学与材料科学学院中国科学技术大学未来技术学院中国科学技术大学合肥微尺度物质科学国家研究中心

单分散铜氮掺杂碳材料是一类很有希望的二氧化碳电还原催化剂.然而,铜位点周围电极-电解质界面的复杂环境阻碍了人们对该体系机理的全面认识以及在机理基础上的系统性优化.本文建立了一个电双层模型来研究在有外加电位条件下碱金属阳离子对单分散铜氮掺杂碳催化剂表面二氧化碳电还原的影响.巨正则系综密度泛函理论计算表明,在相对标准氢电极电势1.2 V的条件下,水合钠离子促进了CO2在Cu位点上的电吸附,使其形成弯曲的二氧化碳负离子;而在足够负的电势条件下,CO2的电吸附(Cu+CO2+e-→Cu-CO2-)而非羧基形成步骤,是钠离子协助下CO2还原为CO反应的决速步.此外,铜与带负电的羧基结合形成类似碳酸氢根的结构,或得益于单价Cu的d10电子构型.研究表明,碱金属阳离子在单分散铜氮掺杂碳上二氧化碳电还原的早期阶段发挥了关键作用,而且恒电势条件的模拟对理解反应机理非常重要.

关键词：阳离子效应二氧化碳电还原恒电势方法第一性原理计算

原人参三醇减轻MDA-MB-231细胞紫杉醇耐药性的机制研究

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中国病理生理杂志 2024年第5期40卷 796-805页

作者：李玲玉叶倩云李艳韩莉王攀攀张荣华暨南大学药学院广东广州510632 暨南大学附属第一医院(广州华侨医院) 广东广州510630 暨南大学中医学院广东广州510632 暨南大学肿瘤研究所广东广州510632 广东省中医药信息化重点实验室广东广州510632

目的:探讨原人参三醇(PPT)对耐紫杉醇(PTX)人乳腺癌MDA-MB-231细胞(MB231-PR细胞)耐药性的影响。方法:构建MB231-PR耐药细胞作为细胞模型。以不同浓度的PPT作用于MB231-PR细胞一定时间。用Cell Titer-Glo试剂和集落形成实验测定MB231-P... 详细信息

目的:探讨原人参三醇(PPT)对耐紫杉醇(PTX)人乳腺癌MDA-MB-231细胞(MB231-PR细胞)耐药性的影响。方法:构建MB231-PR耐药细胞作为细胞模型。以不同浓度的PPT作用于MB231-PR细胞一定时间。用Cell Titer-Glo试剂和集落形成实验测定MB231-PR细胞和MDA-MB-231亲本细胞(MB231-PT细胞)的活力。用流式细胞术测定PPT和PTX联合使用后细胞sub-G1期的变化。Western blot法用于评估细胞凋亡相关蛋白cleaved caspase-3、cleaved多腺苷二磷酸核糖聚合酶(PARP)、survivin、B细胞淋巴瘤2(Bcl-2)和Bcl-2相关X蛋白(Bax)的表达水平。萤光素酶报告基因实验和免疫荧光染色用于检测核因子κB(NF-κB)活性。ELISA检测白细胞介素6(IL-6)和IL-8蛋白表达水平。q PCR检测IL-6、IL-8、CXC趋化因子配体1(CXCL1)、CC趋化因子配体2(CCL2)、CD44、NANOG、八聚体结合转录因子4(OCT4)、性别决定区Y框蛋白2(SOX2)和醛脱氢酶1(ALDH1)的m RNA表达水平。肿瘤球形成实验用于评估干细胞特性。结果:(1)PPT以剂量依赖性方式显著降低MB231-PR细胞活力(P<0.01),半数抑制浓度(IC50)为18.17μmol/L。PPT和PTX联合治疗后,MB231-PR细胞活力显著降低(P<0.01),诱导sub-G1期的积累(P<0.01),Bax/Bcl-2的比值上调(P<0.01),cleaved caspase-3和cleaved PARP蛋白水平升高(P<0.05),survivin蛋白表达水平下降(P<0.01)。(2)PPT与PTX联合治疗后,炎症细胞因子(IL-6、IL-8、CXCL1和CCL2)和肿瘤干细胞标志物(OCT4、SOX2、NANOG、ALDH1和CD44)的m RNA表达水平下调(P<0.05),IL-6和IL-8的蛋白表达水平降低,显著抑制MB231-PR细胞NF-κB的活性(P<0.05),并损害MB231-PR细胞的肿瘤球体生长(P<0.05)。(3)PTX处理诱导了核p-p65的表达,这种作用可以被PPT减弱。结论:PPT联合PTX可通过抑制炎症细胞因子和肿瘤干细胞来降低MB231-PR细胞对紫杉醇的耐药性。

关键词：原人参三醇三阴性乳腺癌紫杉醇耐药性炎症肿瘤干细胞

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