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PhD Defense – Chengjun Li
January 4 @ 9:30 am - 11:30 am
TITLE: Development of Microelectromechanical Systems for Advanced Nanomechanical Characterization
ADVISOR: Dr. Yong Zhu
DATE: January 4, 2019
TIME & LOCATION: 9:30 AM in EB3 Rm. 3235
ABSTRACT: The nanostructures such as nanoparticles, nanowires (NWs), nanotubes and graphene are important building blocks for a broad spectrum of nanotechnology applications including energy harvesting and storage, nanoelectromechanical systems (NEMS), flexible electronics and stretchable electronics, where the ultrahigh strength is of direct relevance. Therefore, it is of important to accurately characterize their mechanical response. Microelectromechanical systems (MEMS) has been proved to be a reliable platform while performing the in-situ characterization of nanostructure. This research focuses on developing a MEMS device to be able to carry out advanced nanomechanical characterization, including design of a MEMS device for displacement controlled mechanical tensile testing and for high strain rate nanomechanical testing, a displacement sensor based on piezoresistors constructed with wheatstone bridge is also designed and characterized.
BIOGRAPHY: Chengjun Li received his B.S. degree in Engineering from the School of Chemical Engineering and Technology at Tianjin University in 2013. He attended North Carolina State University in August 2013. Since then he has been working under Dr. Yong Zhu’s advising. His research interest is focused on MEMS based devices used for nanomechanical testing.