膜控晶体生长及纳米微粒的形成

膜控晶体生长不同于一般在溶液中的沉淀与结晶，由膜形成的有机界面具有空间定位和空间约束、定域化学控制及成核过程和晶体生长的立体化学专一的特性，使得晶体的结构、形状和尺寸上得到控制，并具有良好的重现性，由此可获得具有光、电以及磁特性的纳米功能材料。研究膜控晶体生长不仅可以模拟生物体系内的生物矿化作用，而且对于材料科学也有着特别重要的意义和应用前景。     

有机-无机纳米复合材料的制备与界面特性

有机－无机纳米复合材料是一种新型功能材料，本文综述了有机－无机纳米复合材料的界面特性、与界面效应相关的制备，并对有机－无机纳米复合材料的研究前景进行了展望。     

NASICON纳米晶固体材料的制备与烧结致密化

以常规无机试剂和含硅有机试剂为原料，采用溶胶-凝胶过程与压制成型烧结相结合的方法制备了NASICON纳米晶固体材料，利用TG—DTA对前驱凝胶原粉进行了分析测试，结果表明，NASICON相结构的形成温度范围为750-890℃．实验中重点对800-1000℃烧结所得纳米晶材料进行了表征．目的产物的XRD、FT—IR、FE—SEM、IS结果以及阿基米德法致密度测量结果显示，采用合适的烧结温度和周期可以成功制备出具有纳米级颗粒尺寸、良好结晶特性和较高致密度的固体电解质NASICON材料．材料电学特性测试结果表明，所制备的纳米晶固体电解质材料具有良好的离子导电特性和合理的离子传导激活能，其复合电导与温度倒数的Arrhenius图具有很好的线性关系，并且具有较高结晶特性的材料显示出更高的离子电导率．     

无机纳米颗粒在癌症治疗中的研究进展

纳米材料在癌症治疗中具有重要的意义.近年来,纳米材料的研究涉及多个领域,包括药物传递、疫苗开发、抗菌、诊断、癌症治疗和成像工具等.纳米材料分为有机纳米材料和无机纳米材料,无机纳米材料因其独特的尺寸依赖性的物理化学性质和特殊的光学/电磁学特性而受到广泛关注,而这是有机纳米材料所不具备的.在癌症治疗中,选择合适的无机纳米材料与搭配方法将为治疗带来更好的效果.     

镁合金表面有机纳米薄膜的功能特性

采用有机镀膜技术和三嗪硫醇类有机单体在Mg-Mn-Ce镁合金表面生成了具有疏水特性的有机纳米薄膜。选取循环伏安法曲线中不同特征点研究了有机镀膜的反应机理,借助傅里叶变换红外光谱仪、X射线光电子能谱仪、椭圆偏振光谱仪和接触角测量仪表征了有机镀膜后镁合金表面薄膜的特性.结果表明,有机镀膜过程分为电化学反应成膜和膜层层间聚合反应增厚两个阶段;镁合金与有机物单体通过化学键发生结合;随着有机镀膜反应过程的进行薄膜的厚度由9.14 nm逐渐增加到64.51 nm,形成稳定的纳米薄膜;有机镀膜后镁合金表面的蒸馏水接触角从未镀膜的45.8°上升到117.9°,实现了由亲水到疏水的功能特性转换。     

有机/无机纳米复合材料的制备及应用

有机/无机纳米复合材料是一种集有机、无机、纳米材料的诸多特性于一身的新型功能材料,正在成为一个新兴的极富生命力的研究领域,本文对有机/无机纳米复合材料的制备方法、应用进行了综述.     

有机纳米整流器的STM研究

金属有机络合物Ag-TCNQ的薄膜在STM针尖电场的作用下，当电压达到某一阀值后可以从高阴态跃迁至低阻态。在一定的条件下，在低阻态的保持时间很短，且高低阻间的转换可以重复。由于它们都是有机材料，根据这种特性，提出了一种新型有机纳米整流器的设想，并成功制作了输可控的有机纳米整流器的原型。     

物理所在纳米量子结构可控性实验与理论研究中获新成果

最近。中国科学院物理所高鸿钧研究组时东霞、季威等人在纳米量子结构可控性的实验和理论研究中取得新进展。他们在对功能纳米分子体系进行的系统研究基础上。从理论和实验上进一步研究了烷烃侧链对芳香烃衍生物在贵金属表面的生长与结构特性。研究表明。通过改变无功能特性的烷烃侧链可对整个分子纳米体系的结构与性质进行调控，这拓展了人们对有机功能分子纳米体系的控制能力，发展了有机功能分子在固体表面生长的相关理论与方法。结果发表在美国《物理评论快报}（Phys．Rev．Lett．96，226101（2006））上。     

功能型核壳有机-有机纳米复合粒子的研究进展

核壳型有机-有机纳米复合粒子由于具有粒子可控设计,有机融合不同组分优势等特性,已在导电高分子、水凝胶、舍氟乳液和塑溶胶等方面获得应用.综述了近年来(甲基)丙烯酸酯类不同功能的核壳型有机-有机纳米复合粒子的研究进展,揭示了功能型核壳有机-有机纳米复合粒子在某些领域的巨大应用潜力和存在的问题.     

纳米磁靶向复合材料的研究进照

纳米磁靶向复合材料将纳米技术和磁靶向技术有机结合起来,借助纳米磁性材料的奇异特性,在肿瘤的磁靶向治疗领域具有很大的应用潜力而备受关注.介绍了纳米磁靶向复合材料的组成、制备及应用于肿瘤磁靶向治疗中的研究进展,并对其发展前景进行了展望.     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Effect of Permeable Crystalline Material on Steel Reinforcement Corrosion of Concrete

Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.     

The Research and Application About "Dry Peeling Off" Technology for Airplane Surface Paint Layer

In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.     

Quality Study of Honeycomb Core Shaping Without Wax Stabilization

Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

In-process thermal treatment of polylactic acid in fused deposition modelling

Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.