SiC纳米材料制备及应用

综述了近年来在高新技术领域发展起来的SiC纳米粉体、SiC纳米晶须、SiC同轴纳米电缆的制备方法及其应用，并对一些新型的制备方法进行重点介绍。指出，目前SiC纳米材料制备方法虽然多样，但都规模小，成本高，还难以实现大规模生产；SiC纳米材料性能优于传统的SiC材料，能够达到高新技术领域的严格要求，具有更为广泛的用途。     

模板电化学合成纳米材料的研究进展

模板电化学合成是一种简单直接地制备纳米材料的有效方法。介绍几种常用的模板材料、国内外模板电化学沉积在制备功能纳米材料上的应用,综述了模板电化学制备纳米线阵列、纳米管、纳米导电聚合物以及纳米核壳结构材料的研究进展。制备新型复合纳米结构有序阵列、开展纳米器件的研制是模板合成研究领域的重要方向,这样的有序阵列在光学、磁学、催化及电化学等领域有着重要的应用前景。     

银纳米材料制备和应用进展

 银纳米复合材料由于其优良的综合性能而具有广阔的应用前景,已成为纳米材料研究的热点。本文综述了银纳米颗粒和银纳米复合材料的化学制备方法,包括化学还原法、光还原法、微乳液法、电化学法等,指出了化学还原法由于容易控制粉末粒度和形貌,生产成本相对较低,是目前研究和应用最广的制备纳米银粉的方法,在制备过程中加入保护剂是防止纳米银颗粒团聚的有效方法;分析了银纳米材料在催化材料、抗菌材料、电子电路、表面增强拉曼光谱及其他领域的应用,复合银纳米材料已经在乙烯氧化制环氧乙烷催化剂和抗菌塑料中得到商业化应用;提出制备尺寸可控、形貌可控的银纳米粒子以及各种新型功能性银纳米材料将是今后研究的方向。     

纳米氧化锌的抗真菌活性研究进展

【目的】基于纳米氧化锌的制备工艺简单、良好的生物相容性和抗菌活性等优点,全面阐述纳米氧化锌作为一种新型抗真菌添加剂应用于食品工业领域中的现有成果与潜在挑战。【方法】通过总结、归纳和比较现有研究报道,对纳米氧化锌的抗真菌活性研究进展进行全面综述。【结果】介绍了纳米氧化锌的制备方法及抗真菌性能,深入分析了氧化锌纳米颗粒对真菌生长、繁殖与代谢的影响机制,并总结了目前纳米氧化锌在食品领域中的主要应用,并对纳米粒子的生物安全性进行了评价。【结论】发展适合工业化生产的纳米氧化锌制备技术,加强纳米粒子对真菌生长代谢作用机制的深入研究,建立纳米材料生物安全性评价的方法与标准,将有助于规范和扩大纳米氧化锌等纳米材料在食品生产与食品安全领域中的进一步应用。     

铜纳米材料的制备及应用研究进展

铜纳米材料因具有独特的性质,被广泛应用于抗磨自修复润滑剂、导电浆料、高效催化剂、抗菌剂等领域.本文综述了目前纳米铜及其复合材料的制备及应用研究进展.主要论述了制备纳米铜的化学方法,包括液相还原法、微乳液法、溶剂热法和其他方法.按照铜与无机物或有机物复合两大类,论述了铜纳米复合材料的制备方法及性能应用.讨论了铜纳米材料的摩擦学性能、抗菌性能、催化性能及光电性能.并对纳米铜及复合材料的制备和应用进行了总结与展望.     

21世纪最有前途的材料Ⅱ——纳米材料的制备与应用

主要介绍了二维纳米薄膜、三维纳米晶体材料和纳米复合材料的制备方法。探讨了各种方法的特点与适用性,并展望了纳米材料在催化、光学、电学、磁学,传感器、陶瓷及生物医学等领域的应用前景。     

纳米材料的制备研究及其发展动态

纳米材料具有传统材料所没有的许多崭新特性，已成为当今材料科学和凝聚态物理研究的前沿热点领域，本文介绍了纳米材料研究发展的历史概况；综述了纳米材料的制备方法，按反应性质分为物理法、化学法和综合法３大类；介绍了目前已采用的纳米粒子制备方法的特点和适用范围；展望了纳米材料研究的发展动向。     

纳米CdS材料的研究现状及应用

Ⅱ - Ⅵ族半导体纳米材料CdS,具有较大的禁带宽度(2.42ev),因而,在纳米光电子器件等领域有重要的应用前景.就此,系统地介绍了CdS纳米材料的制备方法及各自特点,就近年来国内外对CdS纳米材料的研究进行了总结,研究表明,CdS纳米复合材料是今后发展的趋势.     

纳米材料的控制生长

近几十年来,纳米科技发展很快。纳米科技的效力在各个领域都得到认可。21世纪,它将在战略高度上有更大的发展。各国都将纳米材料和纳米结构的研究放在重要位置。美国研究的前沿领域就包括：纳米电子技术和装置、纳米制备和微制备技术、纳米生物技术、纳米医药和诊断、纳米环境监测和环境处理技术等,并将继续深化纳米材料和纳米结构的研究。     

卢柯 中国最年轻的院士

卢柯博士在纳米材料及相关亚稳材料领域取得了突出的成就。他发展的利用非晶完全晶化制备全致密纳米材料的新方法已成为当今国际纳米材料的三种主要制备方法之一。他发现了纳米金属铜的室温超塑延展性,被国际权威科学家认为是该领域的一次突破,他领导的青年研究小组被国际纳米材料界公认为世界六大研究小组之一。他们的工作,已成为国际材料科学界的风向标。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with