A recent research led by the Department of Mechanical and Biomedical Engineering (MBE) has shown that silicon nanowires can be stretched above 10% elastic strain, a few samples even reached 16% tensile strain, which is very close to the theoretical elastic limit of silicon (17 to 20%).
The paper titled "Approaching the Ideal Elastic Strain Limit in Silicon Nanowires," presented by Zhang Hongti, a doctoral student in MBE, as the first author, was published in Science Advances, a periodical of the American Association for the Advancement of Science (AAAS) in August. Dr Lu Yang, supervisor of Zhang Hongti and Assistant Professor in MBE, is the leader of this research.
Dr Lu pointed out that silicon is an essential material in the semiconductor industry for the production of various types of electronic devices and microchips which are closely related to human life. Nowadays, there are more and more electronic and mechatronic applications that require large deformation.
"The new findings of super stretchy silicon nanowires can significantly expand their use in such areas and improve health technologies." Dr Lu said. "For example, it allows manufacturers to produce micro medical sensors flexibly attached to a human body which will enable patients to move more freely."
The partnering organisations for this research include the Massachusetts Institute of Technology; University of California, Los Angeles; Xiamen University; and IBM Research Centre.(Adapted from CityU NewsCentre) Back