Field emission signature of pentagons at carbon nanotube caps

Mohammad Khazaei; Kenneth A. Dean; Amir A. Farajian; Yoshiyuki Kawazoe

doi:10.1021/jp068491i

Field emission signature of pentagons at carbon nanotube caps

Mohammad Khazaei, Kenneth A. Dean, Amir A. Farajian, Yoshiyuki Kawazoe

New Industry Creation Hatchery Center (NICHe)

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

25 Citations (Scopus)

Abstract

Localization of emitting states and their tunneling probabilities cause the nanotube cap geometry to have decisive impact on field emission patterns and currents. We show how different arrangements of pentagon rings at the tip can create specific field emission features, utilizing a method based on first principles calculations. The results give an explanation for different field emission patterns observed in experiments, and provide a feasible way to distinguish different cap structures from experimental results. A set of general rules is deduced to infer the tip configuration through the experimental field emission patterns. The calculations agree very well with our experimental results, and are of fundamental interest in characterization and design of carbon nanotube emitters and probes.

Original language	English
Pages (from-to)	6690-6693
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	18
DOIs	https://doi.org/10.1021/jp068491i
Publication status	Published - 2007 May 10

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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AU - Dean, Kenneth A.

AU - Farajian, Amir A.

AU - Kawazoe, Yoshiyuki

PY - 2007/5/10

Y1 - 2007/5/10

N2 - Localization of emitting states and their tunneling probabilities cause the nanotube cap geometry to have decisive impact on field emission patterns and currents. We show how different arrangements of pentagon rings at the tip can create specific field emission features, utilizing a method based on first principles calculations. The results give an explanation for different field emission patterns observed in experiments, and provide a feasible way to distinguish different cap structures from experimental results. A set of general rules is deduced to infer the tip configuration through the experimental field emission patterns. The calculations agree very well with our experimental results, and are of fundamental interest in characterization and design of carbon nanotube emitters and probes.

AB - Localization of emitting states and their tunneling probabilities cause the nanotube cap geometry to have decisive impact on field emission patterns and currents. We show how different arrangements of pentagon rings at the tip can create specific field emission features, utilizing a method based on first principles calculations. The results give an explanation for different field emission patterns observed in experiments, and provide a feasible way to distinguish different cap structures from experimental results. A set of general rules is deduced to infer the tip configuration through the experimental field emission patterns. The calculations agree very well with our experimental results, and are of fundamental interest in characterization and design of carbon nanotube emitters and probes.

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Field emission signature of pentagons at carbon nanotube caps

Abstract

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