纳米

With the increase of MFD, much claviform cobalt ferrite nanoparticles was obtained, and the crystallization of cobalt ferrite nanoparticles became better, also the magnetic properties such as remanence magnetism, saturation magnetism and squareness ratio were increased remarkably.

试验结果表明：无磁场及磁感应强度小于2T时，纳米钴铁氧体颗粒为球形形貌；当磁感应强度大于等于4T时，有棒状纳米钴铁氧体形成；随着磁感应强度的增大，棒状纳米颗粒数量增加，纳米钴铁氧体的晶化程度提高，磁性能(Mr、Ms、Mr/Ms)也有大幅度的提高，10T时制备的纳米钴铁氧体颗粒的剩余磁化强度比无磁场下制备的钴铁氧体颗粒的剩余磁化强度增加了近15倍，饱和磁化强度提高1.44倍。

Electrocatalysis can be considered as one of the most popular application of selemium nanoparticles and carbon nanotubes. In this paper, the potential applications of MWCNTs/Se modified electrode in biological electrocatalytic were investigated and discussed.

根据碳纳米管和纳米硒在生物电催化反应中表现出的巨大潜能，研制了碳纳米管复合纳米硒修饰电极并探讨其在生物分子电化学研究中的应用，对发展新型电化学传感器和拓展纳米材料的应用具有重要的理论意义和实际应用价值。

The CNTs template with average diameter of 20～40nm was functionalized by mercapto groups in advance.The self-assembling principle of gold nanowires was investigated in this work.

以管径为20～40nm的多壁碳纳米管为模板，在经巯基修饰的碳纳米管表面定向沉积一薄层纳米金微粒，从而制得了一维金纳米线，并对纳米金线的自组装原理进行了研究。

One-dimensional gold nanowires were prepared by deposition of gold nanoparticles onto the surface of carbon nanotubes. The CNTs template with average diameter of 20～40nm was functionalized by mercapto groups in advance.

摘 要：以管径为20～40nm的多壁碳纳米管为模板，在经巯基修饰的碳纳米管表面定向沉积一薄层纳米金微粒，从而制得了一维金纳米线，并对纳米金线的自组装原理进行了研究。

According to the characteristic of silver nanoparticles, their uniform dispersion in reaction media was obtained by surface modification, ultrasonic radiation and the select of emulsion, and then emulsion polymerization system were formed by combination with reactive monomer and initiator. Nano-Ag/Polystyrene core-shell particles were prepared by emulsion polymerization and their microstructure were characterized by TEM, FTIR, XPS, AFM and TG/DTA. The experimental results showed that silver nanoparticles were coated by polymer and the composite particles had typical core/shell structure, and the microlevel combination was realized. Meantime, the form mechanism of nano-Ag/polystyrene core-shell particles was tentatively researched. The conclusion is that the perfect coating was able to obtained by the control of reaction condition.

根据纳米银粒子的特性，借助于表面处理、超声辐照以及乳化剂的选择，使其均匀分散在反应介质中，再与反应单体、引发剂等形成乳液聚合体系；采用乳液聚合方法、包裹聚合方式，制备出纳米银/聚苯乙烯核壳复合粒子，并借助于TEM、FTIR、 XPS、AFM、TG/DTA等分析手段对复合粒子微观结构进行了表征；结果表明：纳米银粒子表面被聚合物层包覆，复合粒子呈明显的核壳结构，实现了微观尺度上的复合；同时，初步探讨了纳米银/聚苯乙烯核壳复合粒子的形成机理，指出：通过控制反应条件，可以使形成纳米银/聚苯乙烯核壳复合粒子的聚合反应方式占主导地位，实现最大限度地包覆。

objective to investigate the inhibition mechanism of nanoapatite on the human hepatocelluar carcinoma.methods stable and single-dispersed nanoapatite were synthesized with sol-gel method.nanoapatite were surveyed by zataplus and tem.their effect on the bel-7402human hepatoma cell lines was investigated by the mtt methods,and the mechanism was studied from changes in ultrastructure.results the result showed that inhibition of nanoapatite on the bel-7402human hepatocellular carcinoma cell lines was presended obviously in vitro.conclusion nanoapatite entered into cancer cytoplasm,and cancer cells result in oncosis.

目的 探讨纳米磷灰石的抑癌机制。方法利用sol-gel法制备出稳定单分散的纳米磷灰石体系，应用粒径电位仪和透射电镜对纳米磷灰石进行表征；采用mtt比色法研究纳米磷灰石对细胞系bel-7402人肝癌细胞的作用；从超微结构的改变研究其作用机制。结果实验结果表明，纳米磷灰石在体外对bel-7402人肝癌细胞具有明显的抑制作用。结论通过进入到癌细胞内，导致癌细胞胀亡。

The present work specialized in the purification and open ing of the Multi-walled carbon nanotubes refluxed in concentrated nitric acid or air oxidation method respectively.

碳纳米管具有接近理想的一维纳米空间，而开口的碳纳米管中空管腔可做成纳米试管、虹吸管、超级吸附剂、催化剂载体和储能材料以及在中空的碳纳米管内填充外来物质等。

The coupling agents has no obvious effect on the hardness when nano powders were used as strengthened particles.When liquid silica was used to fabricate the composites,nano particles were wraped by PTFE,reunition was prevented.Whil...

其作用机理为当用固体纳米粉末填料时，由于纳米粉末的团聚作用，丧失了部分纳米颗粒的表面特性，界面结合较差，硬度较低；而使用液体纳米硅溶胶制备PTFE复合材料时，纳米颗粒在搅拌蒸发的过程中被PTFE大分子包裹，可以有效防止团聚的发生。

The nano-silica partrcles are organic-modified by E-MA-GMA elastomer through direct solvent process,the organic-modify process mechanism was studied,and the dispersing of modified nano-silica particles in tetrachloroethane solvent and PBT were investigated.FIRT,TEM,SEM results indicated that the epoxy group of E-MA-GMA could react with the hydroxyl groups of silica surface,helped to reduce the interactions of nano-silica particles particles and improve the dispersion of nano-silica on PBT and the interfacia...

surface modification ；溶液法利用功能化弹性体E-MA-GMA对纳米二氧化硅进行表面有机化修饰改性，分析了表面改性过程机理，同时考察了改性后纳米二氧化硅在四氯乙烷溶剂和PBT基体中的分散情况；FIRT、TEM、SEM测试结果表明，E-MA-GMA的环氧基团与纳米SiO_2的—OH基团发生反应，降低纳米二氧化硅粒子间的相互作用力，改善了纳米二氧化硅在PBT基体中的分散，提高复合材料的相容性。

Photoluminescence properties of ZnSe/silica gel-glasses were investigated by an advanced spectrum system. Excitated by laser of two different wavelength, the electron transition occurred in two different relaxation approaches. Interband radiation spectra and the surface defect radiation spectra of ZnSe nanoparticles were obtained. The correlation between the wavelength of eradiated light and the incident light verifies that the electronic-hole structures change with the size of the nanoparticle.

利用先进的稳态光谱测试系统研究了ZnSe/SiO〓凝胶玻璃纳米复合材料的光致发光特性，凝胶玻璃基纳米复合材料样品中观察到不同波长激发光激发样品，导致激发态电子经两种不同的弛豫途径的辐射跃迁发光，即ZnSe纳米粒子的带间发射光谱和ZnSe纳米粒子的表面缺陷态发光，辐射光的波长与入射光的波长是连续相关的，证实了凝胶玻璃中ZnSe纳米粒子存在随尺寸变化分立的能级结构。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。