检索结果-南通市图书馆

High-sensitivity nanophotonic sensors with passive trapping of analyte molecules in hot spots

Light(Science & Applications) 2021年第1期10卷 60-70页

作者： Xianglong Miao Lingyue Yan Yun Wu Peter q.liu Department of Electrical Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260USA Department of Biomedical Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260

Nanophotonic resonators can confine light to deep-subwavelength volumes with highly enhanced near-field intensity and therefore are widely used for surface-enhanced infrared absorption spectroscopy in various molecular sensing *** enhanced signal is mainly contributed by molecules in photonic hot spots,which are regions of a nanophotonic structure with high-field ***,delivery of the majority of,if not all,analyte molecules to hot spots is crucial for fully utilizing the sensing capability of an optical ***,for most optical sensors,simple and straightforward methods of introducing an aqueous analyte to the device,such as applying droplets or spin-coating,cannot achieve targeted delivery of analyte molecules to hot ***,analyte molecules are usually distributed across the entire device surface,so the majority of the molecules do not experience enhanced field ***,we present a nanophotonic sensor design with passive molecule trapping *** an analyte solution droplet is introduced to the sensor surface and gradually evaporates,the device structure can effectively trap most precipitated analyte molecules in its hot spots,significantly enhancing the sensor spectral response and sensitivity ***,our sensors produce a reflection change of a few percentage points in response to trace amounts of the amino-acid proline or glucose precipitate with a picogram-level mass,which is significantly less than the mass of a molecular monolayer covering the same measurement *** demonstrated strategy for designing optical sensor structures may also be applied to sensing nano-particles such as exosomes,viruses,and quantum dots.

关键词： trapping passive spots

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dynamic tensile characterization of pig skin

引用

Acta Mechanica Sinica 2014年第2期30卷 125-132页

作者： H.Khatam q.liu K.Ravi-Chandar Center for Mechanics of Solids Structures and MaterialsThe University of Texas at Austin

The strain-rate dependent response of porcine skin oriented in the fiber direction is explored under tensile loading. quasi-static response was obtained at strain rates in the range of 10-3s-1to 25 s-1. Characterization of the response at even greater strain rates is accomplished by measuring the spatio-temporal evolution of the particle velocity and strain in a thin strip subjected to high speed impact loading that generates uniaxial stress conditions. These experiments indicate the formation of shock waves; the shock Hugoniot that relates particle velocity to the shock velocity and the dynamic stress to dynamic strain is obtained directly through experimental measurements, without any assumptions regarding the constitutive properties of the material.

关键词： Nonlinear waves Impact tests Digital image correlation Shocks Hugoniot

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE INVESTIGATION ON PLASMA ARC TREATMENT OF CHROMIUM PLATED ALLOY STRUCTURE STEEL

引用

Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 289-294页

作者： X.M.Fan J.W.Huang K.H.Wang q.liu DepartmentofMaterialsScienceandEngineering NanjingUniversityofScienceandTechnologyNanjing210094China

The technology of plasma arc was used to modify the interface adhesion between c hromium coating and steel substrate. The interface microstructure was studied as a function of plasma arc processing parameters. Microstructure analysis was per formed by optical microscopy, scanning electron microscopy and electron probe. T he microhardness distribution along the depth of a cross-section of the chromium coating and the substrate was measured. The results show the energy density of transferred plasma arc is obviously higher than plasma non-transferred arc. The molten interface was obtained by plasma transferred arc. Interfaces between chro mium coating and steel substrate can be divided by plasma non-transferred arc in to three classes: non-molten, a little molten and molten. Good interface bonding was obtained by proper process parameters. The microhardness of chromium coatin g decreases with increasing energy density of plasma arc.

关键词： plasma transferred arc plasma non-transferred arc coating hard-

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fung’s Theories on Vascular Mechanobiology

引用

医用生物力学 2018年第S1期33卷 27-30页

作者：刘树谦 Biomedical Engineering Department Northwestern University

Mechanobiology is the study of how stress and strain are generated by cells and how these mechanical factors regulate cell morphology and *** vascular system is subject to tensile and compressive stress and strain in the blood vessel wal that are generated by blood pressure and play a pivotal role in regulating vascular cell activities including proliferation,differentiation,apoptosis,and *** cellular processes are essential to vascular development,performance,and pathogenic *** has made significant contributions to vascular mechanobiology—establishing the uniform stress theory,addressing the generation and significance of uniform stress and strain across the blood vessel wall,and proposing the stress-growth theory,addressing the role of mechanical stress in regulating cell proliferative ac-tivities(Fung 1984,Fung 1990).These theories have exerted a profound impact on the development of Biomechanics and Mechanobiology in the vascular as well as other systems.

关键词： Fung’s Theories on Vascular Mechanobiology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE CHARACTERISTICS OF MICROSTRUCTURES AND PROPERTIES FOR ADVANCED ALUMINUM/SILICON CONTAINED HOT-ROLLED TRIP STEELS

引用

Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 823-829页

作者： Y.Chern G.Y.Tang W.liu q.liu P.H.Li X.Chen GraduateSchoolatShenzhenofTsinghuaUniversity Shenzhen518055China GraduateSchoolatShenzhenofTsinghuaUniversity Shenzhen518055China／／WuhanIronandSteelGroupCorporationWuhan430080China WuhanIronandSteelGroupCorporation Wuhan430080China

The microstructure characteristics with super fine ferrite grain size less than 5mm, appropriate retained austenite fraction around 5.0% and or removable abundant dislocations have been obtained by controlled rolling and cooling, which leads to well balance com- prehensive properties with high tensile strength of 510 and 615MPa, high elongation of 40% and 27%, low ratio of yield strength to tensile strength 0.83 and 0.80, as well as low ductile- brittle transition temperature less than -80 and -70℃ for advanced aluminum hot-rolled TRIP steel and silicon hot-rolled TRIP steel, respectively.

关键词： super fine ferrite grain removable dislocation retained austenite aluminum silicon hot-rolling TRIP steel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On the texture evolution of Mg-Zn-Ca alloy with different hot rolling paths

引用

Journal of Magnesium and Alloys 2017年第2期5卷 166-172页

作者： q.Li G.J.Huang X.D.Huang S.W.Pan C.L.Tan q.liu College of Materials Science and Engineering Chongqing UniversityChongqing 400044China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

In the present study,the texture evolution and mechanical anisotropy in a typical Mg–Zn–Ca alloy through hot cross rolling(CR)and unidirectional rolling(UR)were systematically *** results show that the rolling path greatly affects the annealed *** UR develops a texture with basal poles mainly distributing along the transverse direction(TD).By contrast,an ellipse-like(0002)texture with basal pole inclining largely away from the normal direction(ND)is developed after hot cross rolling and ***,the CR is an effective method to tailor the texture of the experimental ***,this ellipse-like texture could not reserve during the subsequent unidirectional hot rolling and *** UR and CR plates exhibit a strong planar mechanical anisotropy compared with the traditional unidirectional rolled plate.

关键词： Mg alloys Hot cross rolling Texture Mechanical anisotropy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

STUDY OF HOT CORROSION RESISTANCE MECHANISMS OF ARC SPRAYING COATINGS

引用

Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 1007-1013页

作者： S.N .Ma, q.liu and C.q. Li Surface Engineering Research Institute of CMES, Beijing 100072, China

According to the working condition of boiler tubes of power station, hot corrosion tests were carried out at two temperatures (650℃ and 800℃) to simulate the environment of coal fired boiler. The hot corrosion resistance and mechanism of three arc spraying coatings (SL30, 45CT and FeCrAl) have been studied. The result showed that coating SL30 and 45CT have a better protection ability against hot corrosion. It indicated that a protective Cr 2O 3 scale formed on the surface of coating SL30 and coating 45CT.

关键词： arc spraying coating hot corrosion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thermal induced spin crossover behavior of two dinuclear Fe(Ⅱ) complexes

Thermal induced spin crossover behavior of two dinuclear Fe(...

引用

第七届全国物理无机化学学术会议

作者： J.L.Wang q.liu q.Wu T.liu State Key Laboratory of Fine Chemicals Dalian University of Technology

Two dinuclear Fe(Ⅱ)complexes FeL(NCS)×2DMF×2HO(1)and FeL(NCSe)4×2DMF×2HO(2)have been designed and prepared based on ligand 1-naphthylimino-1,2,4-triazole(L).Single-crystal structural analyses at 298 K identified that the dinuclear complex contains two iron(II)ions in the high spin(HS)state for 1 and *** Fe(Ⅱ)ions in 1 and 2 were low spin(LS)state at 90 K by comparison with the

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

加拿大西部重质油藏注碱／表面活性剂驱的应用潜力

引用

石油科技动态 2009年第3期 57-68页

作者： q.liu

对于重质油藏（其原油粘度从1000mPa·s到10000mPa·S），由于水相至油相不利的流度比，一次采油和水驱只能采出原油地质储量的5％到10％。稠油通常具有相对高的有机酸含量，这些有机酸被碱中和后就地形成了表面活性剂。由于这些表面活... 详细信息

对于重质油藏（其原油粘度从1000mPa·s到10000mPa·S），由于水相至油相不利的流度比，一次采油和水驱只能采出原油地质储量的5％到10％。稠油通常具有相对高的有机酸含量，这些有机酸被碱中和后就地形成了表面活性剂。由于这些表面活性剂的辅助作用，水包油乳状液的粘度比稠油的粘度低得多。这样就可以从油藏中采出包裹在水相中的稠油。？？最初的研究是为了评估在加拿大西部重质油藏中注入的碱／表面活性剂的流动性。比较完整的方法包括了广义的乳化试验，油／盐水界面张力试验，粘度测试，以及注砂试验。试验结果表明通过一种表面活性剂的碱性溶液和低浓度，水／油动态界面张力能够降低到一个超低水平（〈0．01达因／厘米），使得在界面的轻微干扰作用下稠油在地层盐水中容易被乳化。进行一系列的填砂试验就是为了研究碱／表面活性剂在加拿大西部五个重质油藏的回采特性，22℃时原油的粘度从650mPa·s提高到18000mPa·s。在注砂试验中三次采油的原油回采率是原油地质储量的20-30％。注砂试验的结果表明，对于薄的稠油油藏，注入碱／表面活性剂是一种有希望的强化采油方法，而热采法不适合于这种油藏。

关键词：表面活性剂驱重质油藏加拿大注碱西部原油粘度稠油油藏有机酸含量

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

quantized Conductance of Majorana Zero Mode in the Vortex of the Topological Superconductor(Li_(0.84)Fe_(0.16))OHFeSe

引用

Chinese Physics Letters 2019年第5期36卷 90-97页

作者： C.Chen q.liu T.Z.Zhang D.Li P.P.Shen X.L.Dong Z.-X.Zhao T.Zhang D.L.Feng State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433 Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621908 National Laboratory of Superconductivity Institute of PhysicsChinese Academy of SciencesBeijing 100190 Hefei National Laboratory for Physical Science at Microscale CAS Center for Excellence in Quantum Information and Quantum Physicsand Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026

The Major ana zero mode(MZM), which manifests as an exotic neutral excitation in superconductors, is the building block of topological quantum computing. It has recently been found in the vortices of several iron-based superconductors as a zero-bias conductance peak in tunneling spectroscopy. In particular, a clean and robust MZM has been observed in the cores of free vortices in(Li_(0.84)Fe_(0.16))OHFeSe. Here using scanning tunneling spectroscopy, we demonstrate that Major ana-induced resonant Andreev reflection occurs between the STM tip and this zero-bias bound state,and consequently, the conductance at zero bias is quantized as 2e^2/h. Our results present a hallmark signature of the MZM in the vortex of an intrinsic topological superconductor, together with its intriguing behavior.

关键词： OHFeSe quantized Conductance of Majorana Zero Mode in the Vortex of the Topological Superconductor MZM Li STM Fe

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：