低温制冷团队动态

美国佐治亚理工学院Satish Kumar学术讲座通知 - I


2016-05-15

 

应制冷及低温工程系侯予教授、陈良博士邀请,美国佐治亚理工学院Satish Kumar副教授于5月15日至5月21日在我校访问交流。并开设“纳米材料结构热传导微观机理及电子器件应用研究”系列学术讲座,欢迎感兴趣的老师和学生积极参加。
报告安排如下:

 

 

时间

地点

报告题目

516日,下午

16:00 18:00

北二楼1411

Thermal Transport in Nano-Structures and Electronic Devices

 

 

Seminar-1: Thermal Transport in Nano-Structures and Electronic Devices
This talk will give an overview of the research work pursued by Micro Nano Devices and Systems Lab (MiNDS) led by Dr. Satish Kumar at Georgia Tech. The research group addresses electro-thermal transport in carbon nanotube (CNT) network based thin film transistors using meso-scale modeling techniques and phonon transport in 2D materials (graphene, boron-nitride, MoS2, etc.), CNTs, and their interfaces using atomistic modeling techniques. Carbon nanotube networks based thin-film transistors (CN-TFTs) have been considered as strong candidates to improve mobility, flexibility, transparency in applications such as active matrix display drivers, antennas and X-ray image sensors. In this talk, power dissipation and network breakdown in CN-TFTs through a comprehensive approach consisting of coupled electro-thermal model of the CN-TFTs and molecular dynamics simulation of CNT junctions will be presented. This study has investigated the effect of thermal boundary conductance at CNT interfaces on operating voltages, power dissipation, and reliability of CN-TFTs. The analysis has established that the CNT junctions are the likely locations of the hot spots not because of poor CNT-CNT thermal conductance but rather due to the absence of direct contact of buckled part of CNTs with the substrate at crossed CNT junctions. Next, thermal transport analysis at the interface of 2-D materials such as graphene and boron nitride (BN), or graphene and metallic substrate using atomistic Green’s function method will be presented. This study has investigated modifications in the phonon properties of graphene due to the interaction with metallic structures or BN and the interfacial thermal conductance at these interfaces. Finally, thermal transport in polymer-CNT fibers and some recent experimental work of the group will be discussed.