Intelligent Material Systems
讲座名称：
Intelligent Material Systems
讲座时间：
2014-07-18
讲座人：
Prof. Gregory Washington
形式：
校区：
兴庆校区
实践学分：
讲座内容：
讲座题目：Intelligent Material Systems
主讲人：Prof. Gregory Washington
讲座时间/地点：2014年7月18日，周五，15:00~16:30， 科学馆207
讲座简介：
Naturally occurring and synthetic materials have no intelligence except for that which is given to them by attaching actuators, sensors, and programmed intelligence relating sensed stimuli to the corresponding responses. The field of smart materials such as piezoelectric materials, magnetostrictive materials, and shape memory alloys has recently flourished using this “top down” approach (macroscale to microscale) to develop materials that position themselves, actively damp themselves, or provide sensing functions.
The research presented focuses on the use of these materials in a host of applications from automobiles to aircraft. Our latest research focuses on wearable technology and we define a novel branch of next-generation materials systems called Distributed Intelligent Materials Systems (DIMS). These material systems incorporate actuation, sensing, communication and electronics in a solid state fashion, i.e. as inherent parts of the material structure itself, and are not “added on” components. Galium Nitride is one of the materials being developed. The material properties of Gallium Nitride (GaN) suggest possibilities which include optical transparency, integrated on-chip optical sourcing, optical sensing and processing, biocompatibility, robust mechanical performance, thermal stability and greater power handling that are impractical or outright impossible with silicon and other conventional semiconductors. Additionally, it is piezoelectric by virtue of its lack of center of symmetry, which can be exploited for actuation, sensing and energy harvesting. The research presented here seeks to better understand the electromechanical (piezoelectric, electrostrictive) behavior of GaN for applications to next-generation DIMS incorporating actuation, sensing, communication and electronics in a solid-state fashion.v
相关视频