High-performance field emission device utilizing vertically aligned carbon nanotubes-based pillar architectures

Bipin Kumar Gupta; Garima Kedawat; Amit Kumar Gangwar; Kanika Nagpal; Pradeep Kumar Kashyap; Shubhda Srivastava; Satbir Singh; Pawan Kumar; Sachin R. Suryawanshi; Deok Min Seo; Prashant Tripathi; Mahendra A. More; O. N. Srivastava; Myung Gwan Hahm; Dattatray J. Late

doi:10.1063/1.5004769

journal article·2018-01-01Open access

High-performance field emission device utilizing vertically aligned carbon nanotubes-based pillar architectures

Bipin Kumar Gupta, Garima Kedawat, Amit Kumar Gangwar, Kanika Nagpal, Pradeep Kumar Kashyap, Shubhda Srivastava, Satbir Singh, Pawan Kumar, Sachin R. Suryawanshi, Deok Min Seo, Prashant Tripathi, Mahendra A. More, O. N. Srivastava, Myung Gwan Hahm, Dattatray J. Late

AIP Advances· Volume 8· Issue 1

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Source abstract

Abstract

The vertical aligned carbon nanotubes (CNTs)-based pillar architectures were created on laminated silicon oxide/silicon (SiO2/Si) wafer substrate at 775 °C by using water-assisted chemical vapor deposition under low pressure process condition. The lamination was carried out by aluminum (Al, 10.0 nm thickness) as a barrier layer and iron (Fe, 1.5 nm thickness) as a catalyst precursor layer sequentially on a silicon wafer substrate. Scanning electron microscope (SEM) images show that synthesized CNTs are vertically aligned and uniformly distributed with a high density. The CNTs have approximately 2–30 walls with an inner diameter of 3–8 nm. Raman spectrum analysis shows G-band at 1580 cm−1 and D-band at 1340 cm−1. The G-band is higher than D-band, which indicates that CNTs are highly graphitized. The field emission analysis of the CNTs revealed high field emission current density (4mA/cm2 at 1.2V/μm), low turn-on field (0.6 V/μm) and field enhancement factor (6917) with better stability and longer lifetime. Emitter morphology resulting in improved promising field emission performances, which is a crucial factor for the fabrication of pillared shaped vertical aligned CNTs bundles as practical electron sources.

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Research context

Nanomaterials Composites Catalysis & surfaces Materials processing

OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Silicon Nanostructures and Photoluminescence

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CSIR- National Physical Laboratory 1 , Dr K S Krishnan Road, New Delhi 110012, India

Academy of Scientific and Innovative Research (AcSIR), CSIR-National Physical Laboratory Campus 2 , Dr K S Krishnan Road, New Delhi 110012, India

Centre for Advanced Studies in Materials Science and Condensed Matter Physics, Department of Physics, Savitribai Phule Pune University 3 , Pune 411007, India

Department of Materials Science and Engineering, Inha University 4 , 100 Inharo, Nam-Gu, Incheon 22212, Republic of Korea

Nanoscience Centre, Department of Physics (Centre of Advanced Studies), Institute of Science, Banaras Hindu University 5 , Varanasi 221005, India

CSIR - National Chemical Laboratory 6 , Dr. Homi Bhabha Road, Pashan, Pune 411008, India

Funding

Department of Science and Technology, Ministry of Science and Technology · National Research Foundation of Korea · DAE | Board of Research in Nuclear Sciences · University Grants Commission · CSIR | National Physical Laboratory

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