纳米技术

In chapter 5, the concept of zero-span tension known in papermaking area is for the first time introduce to wood science area to explore in-tree variation of longitudinal tensile strength of tracheids and its main influencing factors. In chapter 6, composite micromechanics and classic laminated theory are used to make a comprehensive and detailed analysis of the main influencing factors of mechanical properties of tracheids cell wall. Some experimental results acquired in the foregoing chapters are explained successfully. Results were summarized as follows: Mechanical characteristics of wood at micron scale: 1 At micron scale, the longitudinal mechanicai behavior of wood microtome section differs greatly from that of wood with normal size.

论文的第2章首先研究了微米尺度下木材的力学特性，为后面运用木材微切片拉伸技术奠定一定的理论基础；在第3章，首次考虑到了微米尺度下木材力学性质的尺寸效应，并运用木材微切片正常间距拉伸技术研究了管胞纵向弹性模量的株内变异规律；在第4章，首次利用纳米压痕技术中最新发展起来的连续刚度测量法直接在管胞细胞壁上进行纳米级的压痕实验，测量次生壁S〓层的纵横向弹性模量和硬度，从而把细胞壁力学的研究提高到一个更高的水平；在第5章，首次把造纸领域的零距拉伸技术引入木材科学研究领域，研究了管胞纵向抗拉强度的株内变异规律及其主要影响因素；第6章则运用复合材料细观力学的基本理论和经典层板理论对影响细胞壁力学性能的主要因素进行了全面而系统的分析，并为前几章的一些实验结果提供理论上的解释。

For study new millimicron ceramics powder (Al2O3) preparation technology, after the related researches on the arc spraying technology, it is quoted in the text that arc spraying can be synthesized by the change of the elements of the manufacturing technology of Al2O3 millimian powder by reactively synthesized arc spraying has been studied experimentally.

为了研究新的纳米陶瓷粉体(Al2O3)制造技术，在对电弧喷涂技术进行相关试验后，提出了改变电弧喷涂雾化气体成分，利用电弧喷涂原位反应合成技术，成功地制备了Al2O3纳米粉体材料。

To solve the problem of complex process and high fabricating cost in the current fabrication techniques of carbon nanotube displays, a fully printing technique was presented to fabricate CNT-FED. All the inner structure cells, including cathode and anode electrode patterns, CNT arrays, phosphor dots and cathode and anode spacer, were fabricated by a screen printing process.

针对现有的碳纳米管场发射显示器制造技术中存在的工艺复杂、成本过高的问题，提出了用于制造碳纳米管场发射显示器的全印刷制造技术，即采用丝网印刷工艺制备CNT-FED器件内部包括各电极图形、碳纳米管阵列、荧光粉点阵和绝缘支撑层在内的所有结构。

The main contents are: Status and prospects of micro/nano fabrication technology, semiconductor substrates, vacuum science and plasmas. Several unit processes of microfabrication like diffusion, thermal oxidation, ion implantation, optical and nonoptical lithography, etching, physical deposition, chemical vapor deposition and epitaxial growth. Process integration of these unit processes for example CMOS technique and silicon bipolar technique, microelectro mechanical systems and some nano fabrication technologies will be introduced.

主要内容有：微米/纳米制造技术的现状和展望、半导体衬底、真空科学和等离子体，各种单项微电子加工工艺，如扩散、热氧化、离子注入、光学和非光学光刻、刻蚀、物理淀积、化学气相淀积、外延生长等，以及各种单项工艺的集成技术，如CMOS技术和硅双极型工艺技术，并初步介绍微电子机械系统和纳米加工技术。

Its new applications in environmental engineering are studied, and some suggestions on future research orientation of nanometer TiO 2 photocatalyzer are presented.

综述了近年来纳米TiO2 光催化剂改良的最新技术，包括对其的改性及与其他技术的联合运用，以提高纳米TiO2 的光催化效率；探讨了其在环境工程中的新应用，并就今后纳米TiO2 光催化剂的研究发展方向提出了一些建议。

Pharmacological effect might well change obviously when themedicinal material size is decreased to micro- or nano-size. For those plant herbs, it isdifficult to be ground to nanosize through conventional grinding method; while highspeed centrifugal sheering technology can be used to grind plant herbs tonanosize within a short time.

对于植物根茎类中药，很难采用普通的粉碎方法将其粉碎至微米或纳米级，而高速离心剪切式(High speed centrifugal sheering，简称HSCS)超细粉碎技术是新近发展起来的一种制备纳米粒子的技术，可以将植物根茎类药材粉碎至纳米级别。

The short SWCNTs prepared are able to directly dissolve in polar solvents,such as water,alcohol and acetone.

碳纳米管，特别是单壁碳纳米管在纳米药物和生物技术[6-8]、纳米电子装置[9]、纳米复合材料[10-12]等方面都有重要用途。

In order to realize nano feeding under large feeding force, according to the research state of nano feeding device and development tendency all over the world, combing with china "863" Program "the key technic research of nano precision drive parts having large feeding force", a scheme of nano precision drive parts with bilateral symmetrical structure using in quasi-static state conditions is proposed, the nano precision thermal drive parts are developed and the experimental system is established.

为了实现具有进给力的纳米级进给，根据国内外纳米级驱动部件的研究现状及发展趋势，结合国家&863&高科技计划资助项目&具有大进给力的纳米级驱动部件关键技术的研究&，本文首次提出一种在准静态条件下使用的具有双边对称结构的纳米级热驱动部件设计方案，并且研制纳米级热驱动部件及试验系统。

The fractal theory was used to build fractal microfibril in wood cell wall,and fractal dimension of fractal microfibril layer S1 and layer S2 were calculates,then wood fiber frame with nanometer scale was pointed out.

利用分形理论构建了木材细胞壁中的分形木质纤维，并计算了分形木质纤维 S1层和S2层的扭曲分形维数，指出木材中具有纳米尺度的纤维结构；同时，以木材液化和纳米纺丝技术为基础，提出了木材苯酚液化产物制备碳素纤维材料的构思和技术路线，为解决木材纳米、微米材料的制备提出了新思路。

Stable silver nanoparticles were synthesized via chemical reduction, and silver oxide nanoparticles were synthesized by means of mechanical stirring or sonicating, and both were characterized by TEM.

采用化学还原方法制备了稳定的纳米银溶胶、机械搅拌和超声技术制备了纳米氧化银，并用TEM测试技术对其进行了表征，且超声条件下制备的纳米氧化银粒径最小。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。