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Caption:
Tensile deformation failure of a co-axial nanowire. Microscopy image shows the failure behavior under tensile loading of a co-axial nanowire. The inset image shows a detailed view at the failure region clearly imaging the differences in the modes of failure between the two materials (a brittle outer core and a ductile inner shell) of a co-axial nanowire.
Mahendran Samykano
Advisor: Dr. Ram Mohan
North Carolina A&T State University
Joint School of Nanoscience and Nanoengineering
2907 E. Lee Street
Greensboro, NC 27401
Laboratory website: http://jsnn.ncat.uncg.edu
Technique: The image was acquired using a Zeiss Auriga Scanning Electron Microscope (SEM) with the InLens detector and a 5keV electron beam at a magnification of 25,000 X.
Description:
1-D magnetic nanostructures such as nanowires have important applications in high density magnetic storage, sensors, and in other NEMS/MEMS systems. Experimental mechanical characterization and understanding the mechanisms of failure of such nanowires are extremely limited and difficult to perform within a high powered microscopy environment. Our current research focuses on understanding the process-property relationship in nanostructures such as nanowires to get further scientific and engineering insights on their material structure, morphology characteristics, and associated deformation, failure mechanisms under external loading. Imaging and seeing the deformation and failure is critical for such insights.
Funding Source: Joint School of Nanoengineering; Founding Dean: Dr. James Ryan; State of North Carolina
