title: Dissociation of single-strand DNA: single-walled carbon nanotube hybrids by Watson-Crick base-pairing.
abstract: 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.
authors.affiliation: School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea.
authors.forename: Seungwon
authors.initials: S
authors.lastname: Jung
authors.forename: Misun
authors.initials: M
authors.lastname: Cha
authors.forename: Jiyong
authors.initials: J
authors.lastname: Park
authors.forename: Namjo
authors.initials: N
authors.lastname: Jeong
authors.forename: Gunn
authors.initials: G
authors.lastname: Kim
authors.forename: Changwon
authors.initials: C
authors.lastname: Park
authors.forename: Jisoon
authors.initials: J
authors.lastname: Ihm
authors.forename: Junghoon
authors.initials: J
authors.lastname: Lee
mesh_terms: D020029:Base Pairing; D004277:DNA, Single-Stranded / Q000737:chemistry*; D004583:Electrons; D008958:Models, Molecular; D037742:Nanotubes, Carbon / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D004277:DNA, Single-Stranded; D037742:Nanotubes, Carbon