02321nas a2200313   4500008004100000022001400041245011600055210006900171260000800240300001100248490000600259520127500265100002401540700002001564700002501584700001901609700002801628700002401656700001801680700001701698700002801715700001901743700002301762700002301785700002301808700002201831700002401853856013001877       2018                        eng d  a2158-322600aHigh-performance field emission device utilizing vertically aligned carbon nanotubes-based pillar architectures0 aHighperformance field emission device utilizing vertically align  cJAN  a0151170 v83 a<p>The vertical aligned carbon nanotubes (CNTs)-based pillar architectures were created on laminated silicon oxide/silicon (SiO2/Si) wafer substrate at 775 degrees 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/cm(2) at 1.2V/mu m), low turn-on field (0.6 V/mu m) 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. (c) 2018 Author(s).</p>1 aGupta, Bipin, Kumar1 aKedawat, Garima1 aGangwar, Amit, Kumar1 aNagpal, Kanika1 aKashyap, Pradeep, Kumar1 aSrivastava, Shubhda1 aSingh, Satbir1 aKumar, Pawan1 aSuryawanshi, Sachin, R.1 aSeo, Deok, Min1 aTripathi, Prashant1 aMore, Mahendra, A.1 aSrivastava, O., N.1 aHahm, Myung, Gwan1 aLate, Dattatray, J.  uhttps://library.ncl.res.in/content/high-performance-field-emission-device-utilizing-vertically-aligned-carbon-nanotubes-based