Visualizing the local optical response of semiconducting carbon nanotubes to DNA-wrapping

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

doi:10.1021/nl801038t

Visualizing the local optical response of semiconducting carbon nanotubes to DNA-wrapping

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

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

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.

Original language	English (US)
Pages (from-to)	2706-2711
Number of pages	6
Journal	Nano letters
Volume	8
Issue number	9
DOIs	https://doi.org/10.1021/nl801038t
State	Published - Sep 2008

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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title = "Visualizing the local optical response of semiconducting carbon nanotubes to DNA-wrapping",

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.",

author = "Huihong Qian and Araujo, {Paulo T.} and Carsten Georgi and Tobias Gokus and Nicolai Hartmann and Green, {Alexander A.} and Ado Jorio and Hersam, {Mark C.} and Lukas Novotny and Achim Hartschuh",

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doi = "10.1021/nl801038t",

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T1 - Visualizing the local optical response of semiconducting carbon nanotubes to DNA-wrapping

AU - Qian, Huihong

AU - Araujo, Paulo T.

AU - Georgi, Carsten

AU - Gokus, Tobias

AU - Hartmann, Nicolai

AU - Green, Alexander A.

AU - Jorio, Ado

AU - Hersam, Mark C.

AU - Novotny, Lukas

AU - Hartschuh, Achim

PY - 2008/9

Y1 - 2008/9

N2 - 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.

AB - 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.

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Visualizing the local optical response of semiconducting carbon nanotubes to DNA-wrapping

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