Hot spot dynamics in carbon nanotube array devices

Resumo

We report on the dynamics of Spatial temperature distributions in aligned semiconducting carbon nanotube array devices with submicrometer, channel lengths. By using high resolution,optical microscopy in combination with electrical transport measurements, we observe under steady state bias conditions the emergence, of time-variable, 1061 temperature maxima with dimensions below 300 nm, and temperatures above 400 K. On the basis of time domain cross-correlation analysis, we investigate how the intensity fluctuations of the thermal radiation patterns are correlated with the overall device current. The analysis reveals, the interdependence, of electrical current fluctuations and time-variable hot spot formation that limits the overall device performance and, ultimately, may cause device degradation. The findings have implications for the future development of carbon nanotube-based technologies.

Ficha do documento

Tipo

Artigo científico

Ano

2015

Instituição

Amer Chemical Soc

Fonte

Repositório da FGV

Idioma

Inglês

Acesso

Acesso restrito

DOI

10.1021/acs.nanolett.5b00048

Identificador

oai:repositorio.fgv.br:10438/23455

Temas

Tecnologia

Palavras-chave

Carbon nanotubesPower dissipationThermal imagingNanoelectronicsNanoopticsElectrical-transportTecnologiaNanotubos de carbonoNanoeletrônica