tailieunhanh - Báo cáo hóa học: " Mechanical Properties of Silicon Nanowire"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Mechanical Properties of Silicon Nanowire | Nanoscale Res Lett 2010 5 211-216 DOI s11671-009-9467-7 NANO EXPRESS Mechanical Properties of Silicon Nanowires Young-Soo Sohn Jinsung Park Gwonchan Yoon Jiseok Song Sang-Won Jee Jung-Ho Lee Sungsoo Na Taeyun Kwon Kilho Eom Received 2 June 2009 Accepted 7 October 2009 Published online 27 October 2009 to the authors 2009 Abstract Nanowires have been taken much attention as a nanoscale building block which can perform the excellent mechanical function as an electromechanical device. Here we have performed atomic force microscope AFM -based nanoindentation experiments of silicon nanowires in order to investigate the mechanical properties of silicon nanowires. It is shown that stiffness of nanowires is well described by Hertz theory and that elastic modulus of silicon nanowires with various diameters from 100 to 600 nm is close to that of bulk silicon. This implies that the elastic modulus of silicon nanowires is independent of their diameters if the diameter is larger than 100 nm. This supports that finite size effect due to surface effect does not play a role on elastic behavior of silicon nanowires with diameter of 100 nm. Keywords Silicon nanowire Elastic modulus Nanoindentation Atomic force microscope Young-Soo Sohn and Jinsung Park equally contributed to this work. . Sohn Department of Biomedical Engineering Catholic University of Daegu Gyeongbuk 712-702 Republic of Korea J. Park G. Yoon J. Song S. Na K. Eom Department of Mechanical Engineering Korea University Seoul 136-701 Republic of Korea e-mail kilhoeom@ kilhoeom@ S. -W. Jee . Lee Department of Chemical Engineering Hanyang University Gyeonggi-do 426-791 Republic of Korea T. Kwon Department of Biomedical Engineering Yonsei University Kangwon-do 220-740 Republic of Korea e-mail tkwon@ Mechanical properties of nanostructures such as nanowires 1 carbon nanotubes CNT 2 and or graphene 3 have been taken a lot of interest because of unique mechanical response of such