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

fYear

2008

fDate

18-21 Aug. 2008

Firstpage

255

Lastpage

258

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NANO.2008.82

Filename

4617064