Work

Visualizing the Local Optical Response of Semiconducting Carbon Nanotubes to DNA-Wrapping

Year: 2008

Type: article

Abstract: We studied the local optical response of semiconducting single-walled carbon nanotubes to wrapping by DNA segments using high resolution tip-enhanced near-field microscopy. Photoluminescence (PL) near-field images of single nanotubes reveal large DNA-wrapping-induced red shifts of the exciton energy that are two times higher than indicated by spatially averaging confocal microscopy. Near-field PL spectra taken along nanotubes feature two distinct PL bands resulting from DNA-wrapped and unwrapped nanotube segments. The transition between the two energy levels occurs on a length scale smaller than our spatial resolution of about 15 nm.

Source: Nano Letters

DOI: 10.1021/nl801038t

Authors: Huihong Qian, Paulo T. Araujo, Carsten Georgi, Tobias Gokus, Nicolai Hartmann, Alexander A. Green, Ado Jorio, Mark C. Hersam, Lukas Novotny, Achim Hartschuh

Institutions: Universidade Federal de Minas Gerais, Northwestern University, University of Rochester, Ludwig-Maximilians-Universität München

Language: English

Topic: Carbon Nanotubes in Composites

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2142912150

FWCI: 5.387

Cites: 37

Cited by: 58

Related to: 10