Title :
Experimental Characterization of DNA/CNT Hybrid Structures with Atomic Force Microscope
Author :
Rokadia, Husein ; Tung, Steve ; Spearot, Douglas
Author_Institution :
Dept. of Mech. Eng., Univ. of Arkansas, Fayetteville, AR
Abstract :
Atomic force microscopy was used to characterize the dimensions and the mechanical properties of DNA/carbon nanotube hybrid structures formed by conjugating single-stranded DNAs with single-walled carbon nanotubes in an aqueous medium. On an average about 60% of the carbon nanotube was covered with DNA after conjugation. Nanoindentation data indicates that the radial Young´s modulus of the hybrid structure is about 18 GPa, which is about three orders of magnitude higher than that of DNA and 2 times lower than that of a carbon nanotube. The present results represent the first quantitative information regarding the elastic properties of hybrid DNA/carbon nanotube structures.
Keywords :
DNA; Young´s modulus; atomic force microscopy; carbon nanotubes; elasticity; indentation; interface structure; organic-inorganic hybrid materials; C; Young´s modulus; atomic force microscopy; elasticity; hybrid structures; mechanical properties; nanoindentation; single-stranded DNA; single-walled carbon nanotubes; Atomic force microscopy; Biosensors; Carbon nanotubes; DNA; Gold; Mechanical engineering; Nanobioscience; Protocols; Resonant frequency; Surfaces;
Conference_Titel :
Nanotechnology, 2008. NANO '08. 8th IEEE Conference on
Conference_Location :
Arlington, Texas
Print_ISBN :
978-1-4244-2103-9
Electronic_ISBN :
978-1-4244-2104-6
DOI :
10.1109/NANO.2008.82
