Mechanical Properties of Carbon-Nanotube Tips and Nanoneedles: A Frequency Modulation-Atomic Force Microscope Comparative Study
Mechanical properties of AFM tips with high aspect ratio as single-wall carbon nanotube (SWNT) tips and needles of silicon carved with a focused ion beam (FIB) have been investigated. A phase locked loop (PLL)-controlled frequency modulation-atomic force microscope (FM-AFM) has been used to perform force distance measurements. Based on the understanding of the general mechanical response of the CNTs, we show that SWNTs and nanoneedles exhibit a similar elastic response but a marked difference in the dissipation processes. Nanoneedles show a viscous behavior, while the SWNT mechanical response is purely elastic.
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Document Type: Research Article
Publication date: 2006-06-01
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