Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra

Lain Jong Li; Tsung Wu Lin; J. Doig; I. B. Mortimer; J. G. Wiltshire; R. A. Taylor; J. Sloan; M. L.H. Green; R. J. Nicholas

doi:10.1103/PhysRevB.74.245418

Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra

Lain Jong Li^*, Tsung Wu Lin, J. Doig, I. B. Mortimer, J. G. Wiltshire, R. A. Taylor, J. Sloan, M. L.H. Green, R. J. Nicholas

^*Corresponding author for this work

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

35 Scopus citations

Abstract

We report studies of the modification of the band structure of single-walled carbon nanotubes through encapsulation of the inorganic material manganese ditelluride (Mn Te2). Using photoluminescence excitation mapping we show that this leads to a global reduction of their first and second band gap energies by a similar percentage (up to 3.8%). We interpret this as due to the additional screening which causes a change in the internal dielectric constant and a possible lowering of the carbon-carbon transfer integrals. The shifts increase with increasing tube diameter due to the increased quantity of filled materials.

Original language	English (US)
Article number	245418
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	74
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.74.245418
State	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.74.245418

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Li, L. J., Lin, T. W., Doig, J., Mortimer, I. B., Wiltshire, J. G., Taylor, R. A., Sloan, J., Green, M. L. H., & Nicholas, R. J. (2006). Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra. Physical Review B - Condensed Matter and Materials Physics, 74(24), Article 245418. https://doi.org/10.1103/PhysRevB.74.245418

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abstract = "We report studies of the modification of the band structure of single-walled carbon nanotubes through encapsulation of the inorganic material manganese ditelluride (Mn Te2). Using photoluminescence excitation mapping we show that this leads to a global reduction of their first and second band gap energies by a similar percentage (up to 3.8%). We interpret this as due to the additional screening which causes a change in the internal dielectric constant and a possible lowering of the carbon-carbon transfer integrals. The shifts increase with increasing tube diameter due to the increased quantity of filled materials.",

author = "Li, {Lain Jong} and Lin, {Tsung Wu} and J. Doig and Mortimer, {I. B.} and Wiltshire, {J. G.} and Taylor, {R. A.} and J. Sloan and Green, {M. L.H.} and Nicholas, {R. J.}",

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doi = "10.1103/PhysRevB.74.245418",

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AU - Lin, Tsung Wu

AU - Doig, J.

AU - Mortimer, I. B.

AU - Wiltshire, J. G.

AU - Taylor, R. A.

AU - Sloan, J.

AU - Green, M. L.H.

AU - Nicholas, R. J.

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AB - We report studies of the modification of the band structure of single-walled carbon nanotubes through encapsulation of the inorganic material manganese ditelluride (Mn Te2). Using photoluminescence excitation mapping we show that this leads to a global reduction of their first and second band gap energies by a similar percentage (up to 3.8%). We interpret this as due to the additional screening which causes a change in the internal dielectric constant and a possible lowering of the carbon-carbon transfer integrals. The shifts increase with increasing tube diameter due to the increased quantity of filled materials.

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Crystal-encapsulation-induced band-structure change in single-walled carbon nanotubes: Photoluminescence and Raman spectra

Abstract

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