Dissociation of single-strand DNA: single-walled carbon nanotube hybrids by Watson-Crick base-pairing.
It has been known that single-strand DNA wraps around a single-walled carbon nanotube (SWNT) by pi-stacking. In this paper it is demonstrated that such DNA is dissociated from the SWNT by Watson-Crick base-pairing with a complementary sequence. Measurement of field effect transistor characteristics indicates a shift of the electrical properties as a result of this "unwrapping" event. We further confirm the suggested process through Raman spectroscopy and gel electrophoresis. Experimental results are verified in view of atomistic mechanisms with molecular dynamics simulations and binding energy analyses.
Jung
Seungwon
S
School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea.
Cha
Misun
M
Park
Jiyong
J
Jeong
Namjo
N
Kim
Gunn
G
Park
Changwon
C
Ihm
Jisoon
J
Lee
Junghoon
J
D020029:Base Pairing; D004277:DNA, Single-Stranded / Q000737:chemistry*; D004583:Electrons; D008958:Models, Molecular; D037742:Nanotubes, Carbon / Q000737:chemistry*; D014173:Transistors, Electronic
D004277:DNA, Single-Stranded; D037742:Nanotubes, Carbon