Journal ArticleDOI
Raman spectroscopic evidence for hot-phonon generation in electrically biased carbon nanotubes.
Matti Oron-Carl,Ralph Krupke +1 more
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TLDR
Spectroscopic evidence for hot-phonon generation in biased single-walled carbon nanotubes is provided by measuring simultaneously the Stokes and anti-Stokes Raman lines of the G mode and of the radial-breathing mode as a function of current bias.Abstract:
We provide spectroscopic evidence for hot-phonon generation in biased single-walled carbon nanotubes by measuring simultaneously the Stokes and anti-Stokes Raman lines of the G mode and of the radial-breathing mode as a function of current bias. Using Bose-Einstein statistics we can directly calculate the phonon temperature from the intensity ratio of the anti-Stokes to Stokes lines. Upon nanotube biasing we observe (i) an increase of the G mode phonon temperature in contrast to the radial-breathing mode phonons that remain thermalized at room temperature, and (ii) no softening of the G mode. Based on these observations, we exclude current-induced thermal heating of the nanotube.read more
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Journal ArticleDOI
Raman spectroscopy as a versatile tool for studying the properties of graphene
Andrea C. Ferrari,Denis M. Basko +1 more
TL;DR: The state of the art, future directions and open questions in Raman spectroscopy of graphene are reviewed, and essential physical processes whose importance has only recently been recognized are described.
Journal ArticleDOI
Evolution of light-induced vapor generation at a liquid-immersed metallic nanoparticle
Zheyu Fang,Yu-Rong Zhen,Oara Neumann,Albert Polman,F. Javier García de Abajo,Peter Nordlander,Naomi J. Halas +6 more
TL;DR: These studies provide the first direct and quantitative analysis of the evolution of light-induced steam generation by nanoparticles from the nanoscale to the macroscale, a process that is of fundamental interest for a growing number of applications.
Journal ArticleDOI
Thermal conduction phenomena in carbon nanotubes and related nanostructured materials
TL;DR: In this paper, a detailed review of heat conduction research on both individual carbon nanotubes and nanostructured films consisting of arrays or disordered nanotube mats is presented.
Journal ArticleDOI
Energy dissipation in graphene field-effect transistors.
Marcus Freitag,Mathias Steiner,Yves Martin,Vasili Perebeinos,Zhihong Chen,James C. Tsang,Phaedon Avouris +6 more
TL;DR: In this paper, the temperature distribution in a biased single-layer graphene transistor using Raman scattering microscopy of the 2D-phonon band was measured, and it was shown that remote scattering by substrate polar surface phonons increases the energy transfer to the substrate and at the same time limits the high-bias electronic conduction of graphene.
Journal ArticleDOI
Energy dissipation in graphene field-effect transistors
Marcus Freitag,Mathias Steiner,Yves Martin,Vasili Perebeinos,Zhihong Chen,James C. Tsang,Phaedon Avouris +6 more
TL;DR: In this article, the temperature distribution in a biased single-layer graphene transistor using Raman scattering microscopy of the 2D-phonon band was measured, and it was shown that remote scattering by substrate polar surface phonons increases the energy transfer to the substrate and at the same time limits the high-bias electronic conduction of graphene.