Long linear chains of carbon encapsulated in carbon nanotubes represent the finite realization of carbyne, the truly one-dimensional carbon allotrope. Driven by advances in the synthesis of such structures, carbyne has attracted significant interest in recent years, with numerous experimental studies exploring its remarkable properties. As for other carbon nanomaterials, Raman spectroscopy has played an important role in the characterization of carbyne. In particular, tip-enhanced Raman scattering (TERS) has enabled imaging and spectroscopy down to the single-chain level. In this article, we provide a general introduction to carbyne and discuss the principles and experimental implementation of TERS as a key technology for the investigation of this material system. Within this context, the development of optical nanoantennas as TERS probes is addressed. We then summarize the latest progress in the Raman spectroscopic characterization of confined carbyne, with a focus on the findings assisted by TERS. Finally, we discuss open questions in the field and outline how TERS can contribute to solving them in future studies.
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28 January 2022
Review Article|
January 25 2022
Tip-enhanced Raman spectroscopy of confined carbon chains
Special Collection:
The Ever-Expanding Optics of Single-Molecules and Nanoparticles
Cla Duri Tschannen
;
Cla Duri Tschannen
a)
1
Photonics Laboratory, ETH Zürich
, 8093 Zürich, Switzerland
a)Author to whom correspondence should be addressed: clat@ethz.ch
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Thiago L. Vasconcelos
;
Thiago L. Vasconcelos
2
Materials Metrology Division, Instituto Nacional de Metrologia Qualidade e Tecnologia (INMETRO)
, 25250-020 Duque de Caxias, RJ, Brazil
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Lukas Novotny
Lukas Novotny
1
Photonics Laboratory, ETH Zürich
, 8093 Zürich, Switzerland
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a)Author to whom correspondence should be addressed: clat@ethz.ch
Note: This paper is part of the JCP Special Topic on the Ever-Expanding Optics of Single-Molecules and Nanoparticles.
J. Chem. Phys. 156, 044203 (2022)
Article history
Received:
October 05 2021
Accepted:
December 30 2021
Citation
Cla Duri Tschannen, Thiago L. Vasconcelos, Lukas Novotny; Tip-enhanced Raman spectroscopy of confined carbon chains. J. Chem. Phys. 28 January 2022; 156 (4): 044203. https://doi.org/10.1063/5.0073950
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