Bending fracture in carbon nanotubes. 2008

Wen-Shyong Kuo, and Hsin-Fang Lu
Department of Aerospace and Systems Engineering, Feng-Chia University, Taichung 407, Taiwan, Republic of China.

A novel approach was adopted to incur bending fracture in carbon nanotubes (CNTs). Expanded graphite (EG) was made by intercalating and exfoliating natural graphite flakes. TheĀ EG was deposited with nickel particles, from which CNTs were grown by chemical vapor deposition. The CNTs were tip-grown, and their roots were fixed on the EG flakes. The EG flakes were compressed, and many CNTs on the surface were fragmented due to the compression-induced bending. Two major modes of the bending fracture were observed: cone-shaped and shear-cut. High-resolution scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to examine the crack growth within the graphene layers. The bending fracture is characterized by two-region crack growth. An opening crack first appears around the outer-tube due to the bending-induced tensile stress. The crack then branches to grow along an inclined direction toward the inner-tube due to the presence of the shear stress in between graphene layers. An inner-tube pullout with inclined side surface is formed. The onset and development of the crack in these two regions are discussed.

UI MeSH Term Description Entries

Related Publications

Wen-Shyong Kuo, and Hsin-Fang Lu
October 2002, Journal of nanoscience and nanotechnology,
Wen-Shyong Kuo, and Hsin-Fang Lu
December 2006, Physical review letters,
Wen-Shyong Kuo, and Hsin-Fang Lu
May 2007, Physical review letters,
Wen-Shyong Kuo, and Hsin-Fang Lu
October 1997, Nature,
Wen-Shyong Kuo, and Hsin-Fang Lu
April 2009, Nano letters,
Wen-Shyong Kuo, and Hsin-Fang Lu
August 2009, Proceedings of the National Academy of Sciences of the United States of America,
Wen-Shyong Kuo, and Hsin-Fang Lu
July 2023, Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada,
Wen-Shyong Kuo, and Hsin-Fang Lu
February 2016, Science advances,
Wen-Shyong Kuo, and Hsin-Fang Lu
May 2009, Journal of nanoscience and nanotechnology,
Copied contents to your clipboard!