title: Atomic Defects Influenced Mechanics of II-VI Nanocrystals.
abstract: Mechanical properties of nanocrystals are influenced by atomic defects. Here, we demonstrate the effect of planar defects on the mechanics of ZnO nanorods using atomic force microscopy, high-resolution transmission electron microscopy, and large-scale atomistic simulation. We study two different conditionally grown single nanorods. One contains extended I1-type stacking fault (SF) and another is defect free. The SF containing nanorods show buckling behaviors with reduced critical loading, whereas the other kinds show linear elastic behavior. We also studied the size dependence of elastic modulus and yield strength. The elastic modulus in both nanorods is inversely proportional to their size. Similar trend is observed for yield strength in the SF containing nanorods; however, the opposite is observed in the SF-free nanorods. This first experimental and theoretical study will guide toward the development of reliable electromechanical devices.
authors: Centre for Nano Science and Engineering, Indian Institute of Science , Bangalore, 560012 Karnataka, India.|Department of Instrumentation and Applied Physics, Indian Institute of Science , Bangalore, 560012 Karnataka, India.|IVth Institute of Physics - Solids and Nanostructures, Georg-August-Universität-Göttingen , Friedrich-Hund-Platz 1, Göttingen 37077, Germany.
authors: Moumita
authors: M
authors: Ghosh
authors: IIIrd Institute of Physics - Biophysics and Complex Systems, Georg-August-Universität-Göttingen , Friedrich-Hund-Platz 1, Göttingen 37077, Germany.
authors: Siddharth
authors: S
authors: Ghosh
authors: Department of Mechanical Engineering, Wright State University , Dayton, Ohio 45435, United States.
authors: Hamed
authors: H
authors: Attariani
authors: Department of Materials Science and Engineering, Pennsylvania State University , State College, Pennsylvania 16802, United States.|Department of Materials Science and Engineering, Louisiana Tech University , Ruston, Louisiana 16802, United States.
authors: Kasra
authors: K
authors: Momeni
authors: IVth Institute of Physics - Solids and Nanostructures, Georg-August-Universität-Göttingen , Friedrich-Hund-Platz 1, Göttingen 37077, Germany.
authors: Michael
authors: M
authors: Seibt
authors: Department of Instrumentation and Applied Physics, Indian Institute of Science , Bangalore, 560012 Karnataka, India.
authors: Gowravaram
authors: G
authors: Mohan Rao
keywords: Zinc oxide nanorods; atomic defects; atomic force microscopy; mechanical properties; molecular dynamics; phase transformation