Optical Identification of Helical ss-DNA Wrapping on the Nanotube

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Presentation transcript:

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.1284-6, 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.