Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy

Carsten Georgi; Alexander A. Green; Mark C. Hersam; Achim Hartschuh

doi:10.1021/nn101443d

Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy

Carsten Georgi, Alexander A. Green, Mark C. Hersam, Achim Hartschuh

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

38 Scopus citations

Abstract

We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.

Original language	English (US)
Pages (from-to)	5914-5920
Number of pages	7
Journal	ACS nano
Volume	4
Issue number	10
DOIs	https://doi.org/10.1021/nn101443d
State	Published - Oct 26 2010
Externally published	Yes

Keywords

excitons
localization
near-field microscopy
photoluminescence
single-walled carbon nanotubes

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/nn101443d

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title = "Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy",

abstract = "We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.",

keywords = "excitons, localization, near-field microscopy, photoluminescence, single-walled carbon nanotubes",

author = "Carsten Georgi and Green, {Alexander A.} and Hersam, {Mark C.} and Achim Hartschuh",

year = "2010",

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T1 - Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy

AU - Georgi, Carsten

AU - Green, Alexander A.

AU - Hersam, Mark C.

AU - Hartschuh, Achim

PY - 2010/10/26

Y1 - 2010/10/26

N2 - We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.

AB - We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.

KW - excitons

KW - localization

KW - near-field microscopy

KW - photoluminescence

KW - single-walled carbon nanotubes

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JO - ACS nano

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Probing exciton localization in single-walled carbon nanotubes using high-resolution near-field microscopy

Abstract

Keywords

ASJC Scopus subject areas

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