Activation of carbon nanotube emitters by using supercritical carbon dioxide fluids with propyl alcohol

Po-Tsun Liu*, C. T. Tsai, T. C. Chang, K. T. Kin, P. L. Chang, C. M. Chen, H. F. Cheng

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

This paper explores the application of supercritical carbon dioxide fluids on the field emission enhancement for vertically aligned carbon nanotubes. The typical heating process cannot effectively activate the deionized-water-rinsed carbon nanotube emitters, exhibiting poorer field emission performance, due to residual moisture uptake in the carbon nanotubes. In contrast, the field emission enhancement can be achieved significantly by applying the supercritical carbon dioxide fluids associated with 3 to 9 vol % propyl alcohol. It is found the cosolvent propyl alcohol plays a critical role in the activation efficiency of supercritical carbon dioxide fluids. A physical model is also deduced to clarify the observation.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume9
Issue number4
DOIs
StatePublished - 28 Feb 2006

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