Field emission with ultralow turn on voltage from metal decorated carbon nanotubes

Srividya Sridhar, Chandrasekhar Tiwary, Soumya Vinod, Jose Jaime Taha-Tijerina, Srividvatha Sridhar, Kaushik Kalaga, Benjamin Sirota, Amelia H.C. Hart, Sehmus Ozden, Ravindra Kumar Sinha, Harsh, Robert Vajtai, Wongbong Choi, Krisztián Kordás, Pulickel M. Ajayan

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

A simple and scalable method of decorating 3D-carbon nanotube (CNT) forest with metal particles has been developed. The results observed in aluminum (Al) decorated CNTs and copper (Cu) decorated CNTs on silicon (Si) and Inconel are compared with undecorated samples. A significant improvement in the field emission characteristics of the cold cathode was observed with ultralow turn on voltage (E to ∼ 0.1 V/μm) due to decoration of CNTs with metal nanoparticles. Contact resistance between the CNTs and the substrate has also been reduced to a large extent, allowing us to get stable emission for longer duration without any current degradation, thereby providing a possibility of their use in vacuum microelectronic devices.

Original languageEnglish
Pages (from-to)7763-7770
Number of pages8
JournalACS Nano
Volume8
Issue number8
DOIs
Publication statusPublished - 26 Aug 2014
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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