Laser joining and assembly of nanowires: processing, structure, properties and performance

纳米线的激光连接和组装：加工、结构、特性和性能

• 批准号: RGPIN-2018-03980
• 负责人: Zhou, Norman
• 金额: $ 5.54万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=712307
• 关键词: Laser; joining; assembly; nanowires; processing

This proposed research program will study both fundamental and engineering issues in laser joining and assembly of nanowires, with combined experimental and numerical modeling methods. The goal is to, based on our previous work on laser joining of nanoparticles and nanowires, establish fundamental relationships between laser and other processing parameters, metallurgical characteristics of dissimilar joints of semiconductor nanowires and metal electrodes/substrates, interfacial structure, and electrical contact properties and performance of selected nanowire based electronic components and devices. There are three specific objectives, i.e., (1) to study relationships between processing parameters and joint formation in laser joining of nanowires, based on quantitative (or semi-quantitative) thermal history at interfacial regions; (2) to investigate the effect of laser processing parameters on interfacial structures, including crystallographic orientation relations at the interface, and electrical contact properties; and (3) to build prototype nanowire based electronic devices and explore their electrical performance as related to interfacial structure and electrical contact properties, and study the carrier transport mechanisms at the metal-semiconductor interfaces. The program will cover oxide semiconductor nanowires, such as TiO2, ZnO and CuO, and metal electrodes such as Au, Ag and Ti. Initial processing parameters will include laser fluences, pulse duration, spot size, etc. Advanced analytical equipment such as transmission electron microscopy and X-ray photoelectron emission microscopy will be used for detailed study of metallurgical defects and crystal orientation relations at interfaces, etc. Electrical properties such as contact resistance of Ohmic contacts and energy barrier height of Schottky contacts will be studied as functions of interfacial structures. Electrical performance of functional prototype components and devices such as field effect transistor and memristor will be investigated. The examples of numerical modeling include finite element analysis of thermal history and molecular dynamic simulation of interfacial structures. The successful execution of this program will not only provide valuable fundamental insights such as laser-nanowire interactions, but also develop know-how technologies in laser precision assembly of nanoscale devices. This program will also train 13 highly qualified personnel (HQP), including six doctoral and master's students, four undergraduate work-term students and three post-doctoral fellows with cutting edge knowledge and skills in the fields of materials science and engineering, laser processing and nanoscale device development. Canada's future competitiveness will also be enhanced through their future positions in Canadian academia, industries and research institutes.

该提出的研究计划将研究激光加入和组装纳米线的基本和工程问题，并结合实验和数值建模方法。目的是根据我们先前关于激光连接纳米颗粒和纳米线的工作，建立了激光与其他处理参数之间的基本关系，半导体纳米线含量不相似的关节的冶金特征以及金属电极/基础电极/基础，互动和基于电子互动的构图和基于电子的nanononic inonic inonic inonic inonic inonic inonic inonic compentire and natorire andonic compentire。 有三个特定的目标，即（1）基于界面区域的定量（或半定量）热史，研究纳米线的加工参数与关节形成之间的关系； （2）研究激光处理参数对界面结构的影响，包括界面处的晶体学取向关系以及电接触特性； （3）构建基于纳米线的原型电子设备并探索与界面结构和电气接触特性相关的电性能，并研究金属 - 腔界面的载体传输机制。 该程序将涵盖氧化物半导体纳米线，例如TiO2，ZnO和CuO，以及金属电极，例如Au，Ag和Ti。初始处理参数将包括激光液，脉冲持续时间，点大小等。先进的分析设备，例如传输电子显微镜和X射线光电子光学发射显微镜将用于详细研究冶金缺陷和界面的晶体取向关系等。在界面上等等。将研究功能原型组件和设备（例如现场效应晶体管和磁带）的电性能。数值建模的示例包括对界面结构的热史和分子动态模拟的有限元分析。 该程序的成功执行不仅将提供有价值的基本见解，例如激光纳米线相互作用，而且还提供了在纳米级设备的激光精确组装中开发专有技术的技术。该计划还将培训13名高素质的人员（HQP），其中包括6名博士和硕士学生，4名本科工作学期学生以及三名在材料科学和工程领域，激光处理和纳米级设备开发领域具有尖端知识和技能的博士后研究员。加拿大未来在加拿大学术界，工业和研究机构的未来职位也将提高加拿大的竞争力。