1. Optical Identification of Helical ss-DNA Wrapping on the Nanotube
Slava V. Rotkin, Physics Department and Center for Advanced Materials and Nanotechnology, Lehigh University, Bethlehem, PA 18015
Small v.4, p , Aug 2008
AR of PhysChem, v.61, 2010
in perp polarization (vertical energy axis): new line appears at much lower energy
in II polarization:
the line shift
Eg= E11=1.43 eV
Egpert = 1.33 eV
3D view of the hybrids
3.5
2.5
1.5
Bare [7,0] tube
DNA-wrapped tube
Perp. Absorption Energy (eV)
Parallel Emission Energy (eV)
0.8
1.8
2.8
Lifting of the optical selection rules changes the spectrum qualitatively: Old transitions in the perpendicular polarization are present (but shifted); new ones appear that are prohibited for the pristine nanotube.