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Issue 24, 2018
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Highly efficient field emission properties of radially aligned carbon nanotubes

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Abstract

Here, we report extraordinary field emission properties from one pot synthesized aligned carbon nanotubes endowed with related Fe nanoparticles (NPs). The CNT configuration is in the form of a carbon hollow cylinder (CHC) with CNTs radially aligned towards the CHC axis. The structure generates electron field emission properties such as an ultralow turn on field (0.35 V μm−1 at 10 μA cm−2), a low threshold field (0.41 V μm−1 at 100 μA cm−2) and a high field emission current density (7.71 mA cm−2 at 0.78 V μm−1). It also exhibits multi-fold improvement in the field enhancement factor (1.34 × 104) with highly stable current emission at 100 μA measured for 14 h. No post synthesis treatment is required for enhanced field emission characteristics. The growth related Fe NPs assist in lowering the work function and hence enhancing the field emission properties. The possibility of assembling nano-structured field emitters into macroscale architectures suggests new prospects for next generation three dimensional electron sources.

Graphical abstract: Highly efficient field emission properties of radially aligned carbon nanotubes

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Publication details

The article was received on 15 Feb 2018, accepted on 22 May 2018 and first published on 23 May 2018


Article type: Paper
DOI: 10.1039/C8TC00814K
J. Mater. Chem. C, 2018,6, 6584-6590

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    Highly efficient field emission properties of radially aligned carbon nanotubes

    P. Tripathi, B. K. Gupta, A. Bhatnagar, C. R. P. Patel, P. K. Banker, D. J. Late, M. A. More, N. P. Lalla, D. M. Phase, R. J. Choudhary, M. A. Shaz, P. M. Ajayan and O. N. Srivastava, J. Mater. Chem. C, 2018, 6, 6584
    DOI: 10.1039/C8TC00814K

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