4D LABS Seminar - Dr. Han
We are pleased to invite you to a special seminar by Dr. Seung Min Jane Han hosted by 4D LABS at SFU on Wednesday, July 22, 2015!
Dr. Seung Min Jane Han
Graduate School of EEWS, KAIST
Mechanical Properties of 1D and 2D Nanoscale Materials
With recent technological trend in utilizing nanostructures in different engineering applications, understanding the mechanical properties of materials at the nanoscale is of critical importance. The focus of our research is in studying the fundamentals in mechanical properties of nanostructured metals using ex-situ and in-situ SEM, TEM methods. Nanoscale metals have been reported to have unique mechanical behavior that is strikingly different from that of the bulk. In this seminar, mechanical properties of two different nanoscale structures will be discussed: nanowires and 2D nanolayered composites. First, fundamentals of the plastic deformation in single crystal metal nanowires will be discussed, and the unique deformation behavior found in metal nanowires will be used to explain the high reliability of metal nanowire network for flexible transparent electrode applications. In addition, strength and plasticity of 2D nanolayered composites with the focus on metal-graphene nanolayers will be presented. Due to the high strength and modulus of graphene, dislocation slip transmission in metal nanolayers can be blocked to result in ultra high strengths. Comprehensive study of ex-situ, in-situ TEM and MD simulations indicating the effectiveness of graphene in blocking dislocations will be presented. The metal-graphene nanolayers also have also been determined to have excellent radiation resistance and its suitability for nuclear structural material applications will be discussed.
Date: July 22, 2015
Time: 3:30 pm
Location: Room SSB7172 at SFU Burnaby