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Tunable dipole–dipole interactions between nanoparticles levitated by two orthogonally polarized optical traps

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Photonics Research 2024年第10期12卷 2139-2147页

作者： TONG LI MIAN WU PEITONG HE NAN LI ZHIMING CHEN ZHENHAI FU xiaowen gao HUIZHU HU Research Center for Advanced Computational Sensing and Intelligent Processing Zhejiang LabHangzhou 310000China State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Research Center for Frontier Fundamental Studies Zhejiang LabHangzhou 310000China

Arrays of optically levitated nanoparticles with fully tunable light-induced dipole–dipole interactions have emerged as a platform for fundamental research and sensing ***,previous experiments utilized two optical traps with identical polarization,leading to an interference ***,we demonstrate light-induced dipole–dipole interactions using two orthogonally polarized optical ***,we achieve control over the strength and polarity of the optical coupling by adjusting the polarization and propose a method to simultaneously and stably measure conservative and non-conservative coupling *** results provide a new scheme for exploring entanglement and topological phases in arrays of levitated nanoparticles.

关键词： dipole polarized conservative

金融稳定视域下金融稳定保障基金与存款保险基金的衔接

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学习与实践 2024年第4期 65-71页

作者：高小雯中南财经政法大学法学院湖北武汉430074

建立金融稳定保障基金和存款保险基金衔接机制,提升金融稳定维护能力,是当前立法所须直面的命题。目前,两种基金的衔接仍处于初步探索阶段,面临法益价值衡量缺位、权责边界规范欠缺、配套保障机制失灵的衔接困境。立法亟需确立系统性风... 详细信息

建立金融稳定保障基金和存款保险基金衔接机制,提升金融稳定维护能力,是当前立法所须直面的命题。目前,两种基金的衔接仍处于初步探索阶段,面临法益价值衡量缺位、权责边界规范欠缺、配套保障机制失灵的衔接困境。立法亟需确立系统性风险底线原则、市场优先原则的价值顺位,补足两种基金功能定位、衔接标准、使用顺序的法律规范,完善统筹协调机制决策、信息机制共享的配套保障。

关键词：存款保险基金金融稳定保障基金金融风险治理

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Nanoscale electric field sensing using a levitated nano-resonator with net charge

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Photonics Research 2023年第2期11卷 279-289页

作者： SHAOCONG ZHU ZHENHAI FU xiaowen gao CUIHONG LI ZHIMING CHEN YINGYING WANG XINGFAN CHEN HUIZHU HU Quantum Sensing Center Zhejiang LabHangzhou 310000China State Key Laboratory of Modern Optical Instruments College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

The nanomechanical resonator based on a levitated particle exhibits unique advantages in the development of ultrasensitive electric field detectors. We demonstrate a three-dimensional, high-sensitivity electric field measurement technology using the optically levitated nanoparticle with known net charge. By scanning the relative position between nanoparticle and parallel electrodes, the three-dimensional electric field distribution with microscale resolution is obtained. The measured noise equivalent electric intensity with charges of 100e reaches the order of 1 μV·cm^(-1)·Hz^(-1/2)at 1.4 × 10^(-7) mbar. Linearity analysis near resonance frequency shows a measured linear range over 91 d B limited only by the maximum output voltage of the driving equipment. This work may provide an avenue for developing a high-sensitivity electric field sensor based on an optically levitated nano-resonator.

关键词： resonator field charge

Yoctonewton force detection based on optically levitated oscillator

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Fundamental Research 2023年第1期3卷 57-62页

作者： Tao Liang Shaochong Zhu Peitong He Zhiming Chen Yingying Wang Cuihong Li Zhenhai Fu xiaowen gao Xinfan Chen Nan Li Qi Zhu Huizhu Hu Zhejiang Lab Hangzhou 311121China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

Optically levitated oscillators in high vacuum have excellent environmental isolation and low mass compared with conventional solid-state sensors,which makes them suitable for ultrasensitive force *** force resolution usually scales with the measurement bandwidth,which represents the ultimate detection capability of the system under ideal conditions if sufficient time is provided for ***,considering the stability of a real system,a method based on the Allan variance is more reliable to evaluate the actual force detection *** this study,a levitated optomechanical system with a force detection sensitivity of 6.33±1.62 zN/Hz^(1/2)was *** for the first time,the Allan variance was introduced to evaluate the system stability due to the force sensitivity *** force detection resolution of 166.40±55.48 yN was reached at the optimal measurement time of 2751 *** system demonstrated in this work has the best force detection performance in both sensitivity and resolution that have been reported so far for optically levitated *** reported high-sensitivity force detection system is an excellent candidate for the exploration of new physics such as fifth force searching,high-frequency gravitational waves detection,dark matter research and so on.

关键词： Levitated oscillators Optical trap Feedback cooling Force detection Allan variance

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氮掺杂碳点荧光增强型探针检测对硫磷

分析试验室 2023年第8期42卷 1033-1038页

作者：高晓文冯素玲河南师范大学化学化工学院新乡453007

以石榴籽作为碳源,天冬氨酸和色氨酸作为钝化剂,结合水热法制备了氮掺杂碳点(N-CDs)。通过透射电镜、 X射线光电子能谱和红外光谱对N-CDs进行了表征。所制备的氮掺杂N-CDs具有良好的抗光漂白性,对常见金属离子具有优异的化学惰性。有机... 详细信息

以石榴籽作为碳源,天冬氨酸和色氨酸作为钝化剂,结合水热法制备了氮掺杂碳点(N-CDs)。通过透射电镜、 X射线光电子能谱和红外光谱对N-CDs进行了表征。所制备的氮掺杂N-CDs具有良好的抗光漂白性,对常见金属离子具有优异的化学惰性。有机磷农药对硫磷能够和N-CDs发生强烈的相互作用,该相互作用显著增强了N-CDs的发光强度。以N-CDs作为荧光增强型探针测定对硫磷,方法的线性范围为0.01~1.1μmol/L,检出限低至3.7 nmol/L。同时探讨了对硫磷增强N-CDs发光强度的机理。所建立的方法用于环境水样中对硫磷的检测,结果的相对标准偏差小于3.2%,回收率在98.0%~102.7%之间。

关键词：碳点荧光探针荧光增强对硫磷石榴籽

为什么教育投资会转化为政治资本——“国考热”现象产生的资本收益视角分析

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教育与经济 2013年第5期29卷 37-41页

作者：高晓文东北师范大学教育学部吉林长春130024

本文透过"国考热"现象,分析其产生的深层原因与制度背景。笔者在引入波兰尼"再分配经济"的概念后提出了如下两个问题:(1)再分配社会中政治资本与人力资本的投资收益序列是什么样的?(2)再分配社会中教育投资在政治资本的转化过程中具有... 详细信息

本文透过"国考热"现象,分析其产生的深层原因与制度背景。笔者在引入波兰尼"再分配经济"的概念后提出了如下两个问题:(1)再分配社会中政治资本与人力资本的投资收益序列是什么样的?(2)再分配社会中教育投资在政治资本的转化过程中具有什么样的信号作用?研究表明,青年人热衷于向体制内的回流与我国当前劳动力市场中的资本收益序列相关,而这一收益序列结构又是在我国长期实行的经济再分配机制内形成的。显然,只有揭示出这三者之间的内在关系,才能对教育投资、职业流动与政治资本的形成进行一种系统连贯的说明。

关键词：国考热政治资本人力资本再分配

Exosome/metformin-loaded self-healing conductive hydrogel rescues microvascular dysfunction and promotes chronic diabetic wound healing by inhibiting mitochondrial fission

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Bioactive Materials 2023年第8期26卷 323-336页

作者： Yue Zhang Meng Li Yunchuan Wang Fei Han Kuo Shen Liang Luo Yan Li Yanhui Jia Jian Zhang Weixia Cai Kejia Wang Ming Zhao Jing Wang xiaowen gao Chenyang Tian Baolin Guo Dahai Hu Department of Burns and Cutaneous Surgery Xijing HospitalFourth Military Medical University127 Changle West RoadXi’anShaanxi710032China State Key Laboratory for Mechanical Behavior of Materials And Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an710049China Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an710049China

Chronic diabetic wounds remain a globally recognized clinical *** occur due to high concentrations of reactive oxygen species and vascular function disorders.A promising strategy for diabetic wound healing is the delivery of exosomes,comprising bioactive *** activates the vascular endothelial growth factor pathway,thereby improving angiogenesis in hyperglycemic ***,multifunctional hydrogels loaded with drugs and bioactive substances synergistically promote wound repair has been rarely reported,and the mechanism of their combinatorial effect of exosome and metformin in wound healing remains ***,we engineered dual-loaded hydrogels possessing tissue adhesive,antioxidant,self-healing and electrical conductivity properties,wherein 4-armed SH-PEG cross-links with Ag^(+),which minimizes damage to the loaded goods and investigated their mechanism of promotion effect for wound *** carbon nanotubes exhibiting good conductivity were also incorporated into the hydrogels to generate hydrogen bonds with the thiol group,creating a stable three-dimensional structure for exosome and metformin *** diabetic wound model of the present study suggests that the PEG/Ag/CNT-M+E hydrogel promotes wound healing by triggering cell proliferation and angiogenesis and relieving peritraumatic inflammation and vascular *** mechanism of the dual-loaded hydrogel involves reducing the level of reactive oxygen species by interfering with mitochondrial fission,thereby protecting F-actin homeostasis and alleviating microvascular ***,we propose a drug-bioactive substance combination therapy and provide a potential mechanism for developing vascular function-associated strategies for treating chronic diabetic wounds.

关键词： Dual-loaded hydrogels Adipose-derived mesenchymal stem cell exosomes Metformin Angiogenesis Mitochondrial fission Chronic diabetic wound Wound healing

Insight into the rapid growth of graphene single crystals on liquid metal via chemical vapor deposition

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Science China Materials 2019年第8期62卷 1087-1095页

作者： Shuting Zheng Mengqi Zeng Hui Cao Tao Zhang xiaowen gao Yao Xiao Lei Fu College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China Institute for Advanced Studies (IAS) Wuhan University Wuhan 430072 China

Previous reports about the growth of large graphene single crystals on polycrystalline metal substrates usually adopted the strategy of suppressing the nucleation by lowering the concentration of the feedstock, which greatly limited the rate of the nucleation and the sequent growth. The emerging liquid metal catalyst possesses the characteristic of quasi-atomically smooth surface with high diffusion rate. In principle, it should be a naturally ideal platform for the lowdensity nucleation and the fast growth of graphene. However,the rapid growth of large graphene single crystals on liquid metals has not received the due attention. In this paper, we firstly purposed the insight into the rapid growth of large graphene single crystals on liquid metals. We obtained the millimeter-size graphene single crystals on liquid Cu. The rich free-electrons in liquid Cu accelerate the nucleation, and the isotropic smooth surface greatly suppresses the ***, the fast mass-transfer of carbon atoms due to the excellent fluidity of liquid Cu promotes the fast growth with a rate up to 79 μm s^-1. We hope the research on the growth speed of graphene on liquid Cu can enrich the recognition of the growth behavior of two-dimensional(2 D) materials on the liquid metal. We also believe that the liquid metal strategy for the rapid growth of graphene can be extended to various 2 D materials and thus promote their future applications in the photonics and electronics.

关键词： graphene single crystal rapid growth liquid metal chemical vapor deposition

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艺术取向教育研究方法:缘起、争议与实践

比较教育研究 2022年第11期44卷 86-94页

作者：高晓文林鹏东北师范大学教育学部吉林长春130024

20世纪六七十年代西方教育研究者开始把艺术取向的研究方法引入教育研究,以文学、表演和视觉等艺术形式开展教育研究实践,并以艺术作品来呈现研究结果,为解释教育问题提供了新的视角。作为一种突破性的研究方法,艺术取向的教育研究方法... 详细信息

20世纪六七十年代西方教育研究者开始把艺术取向的研究方法引入教育研究,以文学、表演和视觉等艺术形式开展教育研究实践,并以艺术作品来呈现研究结果,为解释教育问题提供了新的视角。作为一种突破性的研究方法,艺术取向的教育研究方法引起了教育研究界对其价值论、方法论和伦理性等方面的理论争议,如艺术取向的教育研究有何独特价值、其研究程序是否规范、研究者与被研究者如何平权等成为人们争论的核心问题。在实践模式上,艺术取向的教育研究围绕着文学、表演和视觉艺术三种主要形式展开,并与传统的定量或定性研究方法混合使用。随着教育研究的深入发展、研究方法的不断完善,艺术取向的教育研究有着广阔的未来前景。

关键词：艺术取向教育研究方法研究范式