Scanning Probe Microscopy on DNA-CNT Conjugated Structures

POSTER

Abstract

Single stranded DNA (ssDNA) interacts strongly with carbon nanotubes (CNTs) to form a stable DNA-CNT hybrid that effectively disperses CNTs in aqueous solution. In our experiment, ss-DNA oligonucleotide~with a repeating G-T sequence was used. Atomic Force Microscopy and Low Temperature Scanning Tunneling Microscopy are used to image the structures of DNA-CNT on gold substrate. Our experimental result shows an entangled DNA with CNT. The Voltage dependent LT-STM images demonstrate that DNA molecules become transparent at low bias voltages at constant current mode. This work is financially supported by Ohio University \underline {Biomimetic Nanoscience and NanoTechnology} (BNNT) and the US Department of Energy Basic Energy Sciences grant no. DE-FG02-02ER46012 .

Authors

  • Danda P. Acharya

    • Ohio University, Department of Physics and Astronomy
    • Ohio University

  • Wei Lu

    • Ohio University

  • Liwei Chen

    • Ohio University

  • Saw W. Hla

    • Ohio University
    • OU