Enhanced field-emission properties of buckled α-borophene by means of Li decoration: a first-principles investigation

2018 ◽  
Vol 20 (22) ◽  
pp. 15139-15148 ◽  
Author(s):  
Bing Zheng ◽  
Liang Qiao ◽  
Hai-tao Yu ◽  
Qi-yue Wang ◽  
Ying Xie ◽  
...  
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Field Emission ◽  
Potential Barrier ◽  
Electron Emission ◽  
First Principles ◽  
Emission Current ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Current

Li decoration and external electric field decrease the potential barrier to electron emission and increase field emission current of buckled α-borophene.

Influence of Cathode Size on Field Emission Properties of a Single Vertical Carbon Nanotube Material

2016 ◽  
Vol 723 ◽  
pp. 454-458 ◽  
Author(s):  
Li Guo Jing ◽  
He Qiu Zhang ◽  
Yu Qiu ◽  
Bing Yin ◽  
Li Zhong Hu
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
Field Emission ◽  
Emission Current ◽  
Perfect Conductor ◽  
Current Increase ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Current ◽  
Constant Potential

In this work, we study the field emission properties of a single vertical carbon nanotube with cathode radius changing. The carbon nanotube is considered as purely perfect conductor, and the anode and cathode are modeled as discs. The radius of anode is kept as 24m, then the radius of cathode is changed from 24 m to 1 m. The emitter of that CNT consists of a hemispherical cap of 4 nm radius (r) on top of a cylinder height of 2 m (h). The distance from anode to cathode is w=h+20m. The overall surface area of the CNT and cathode are all grounded, and the anode plate has a constant potential value of 100 V. The distribution of potential and electric field, field emission current are obtained by simulating with the help of COMSOL Multiphysics 4.3b electrostatics module. We find that with cathode radius decrease, the electric field strength over the surface of carbon nanotube (CNT) strengthening and field emission current increase.

Field Emission Properties of Individual Carbon Nanotubes in Nanorobotic Manipulation and Electron-Beam-Induced Deposition

2004 ◽  
Vol 16 (6) ◽  
pp. 597-603 ◽  
Author(s):  
Fumihito Arai ◽  
◽  
Pou Liu ◽  
Lixin Dong ◽  
Toshio Fukuda ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Field Emission ◽  
Emission Current ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Current ◽  
Multi Walled Carbon Nanotubes ◽  
Electron Beam Induced Deposition ◽  
Afm Cantilever

Field emission properties of individual multi-walled carbon nanotubes (MWNTs) were studied in nanorobotic manipulation and electron-beam-induced deposition (EBID). Nanotube emitters are constructed by picking up and assembling individual nanotubes on a commercially available atomic force microscope (AFM) cantilever or a tungsten probe. The relationship between field emission current and interelectrode distance was obtained by changing the distance between the tip of the nanotube emitter and the counterpart anode, which can be potentially applied as the principle for an approaching sensor to detect nanometer scale distance by observing field emission current in real time. Field emission current on a microampere scale from a CNT emitter was shown to be strong enough for EBID without obviously degrading emitters. Deposit topology was related to current density or the emitter shape, suggesting that information on emitter geometry could be obtained from EBID deposits. Energy dispersive X-ray spectrometry (EDS) analysis of deposits from W(CO)6showed that the tungsten mass exceeds 80% on the average among compositions. Much higher voltage may degrade the emitter, and saturated current may be used to adjust the emitter length in a controlled way.

CORRELATION BETWEEN ELECTRONIC STRUCTURES OF METAL-INTERCALATED SINGLE WALL CARBON NANOTUBES WITH THEIR FIELD EMISSION PROPERTIES

2005 ◽  
Vol 04 (spec01) ◽  
pp. 657-668
Author(s):  
YAN WANG ◽  
THANH N. TRUONG
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Electronic Structures ◽  
Dft Method ◽  
Emission Current ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Current

The effects of various metal intercalations ( Li , Na and Be ) on the electronic structures and the field emission properties of single-wall carbon nanotubes (SWNT) were investigated using the periodic plane-wave DFT method. We found that intercalations of metal tend to shift the conductive characteristics of the SWNT from those of a semiconductor to those of a quasi-metallic conductor. The Fermi levels for all metal-intercalated in SWNT are moved toward the conduction band, induced by the charge transfer from the metal to the SWNT. Intercalations of Li and Na atoms increase the field emission current, whereas Be intercalation does not affect the field emission current due to the absence of high density of states around the Fermi level. The correlation between the electronic structures for the metal-intercalated nanowires with field emission properties is further discussed in light of the above results.

scholarly journals Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6439-6446 ◽  
Author(s):  
Chunmei Tang ◽  
Xinyue Liao ◽  
Weijie Zhong ◽  
Hongya Yu ◽  
Zhongwu Liu
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Cuo Nanowires

The growth and field emission properties of thermally oxidized CuO nanowires are influenced by the electric field intensity and direction.

scholarly journals Strain and screening effects on field emission properties of armchair graphene nanoribbon arrays: a first-principles study

RSC Advances ◽  
2018 ◽  
Vol 8 (40) ◽  
pp. 22625-22634 ◽  
Author(s):  
Han Hu ◽  
Siow Mean Loh ◽  
Tsan-Chuen Leung ◽  
Ming-Chieh Lin
Keyword(s):  
Field Emission ◽  
First Principles ◽  
Graphene Nanoribbons ◽  
Local Density ◽  
First Principles Calculations ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Armchair Graphene Nanoribbons ◽  
Armchair Graphene Nanoribbon ◽  
Armchair Graphene

The field screening effect on the field-emission properties of armchair graphene nanoribbons (AGNRs) under strain has been studied using first-principles calculations with local density approximation (LDA).

scholarly journals Micro Flowers of SrS/Bi2S3 Nanocomposite and Its Field Emission Properties

2019 ◽  
Vol 3 (4) ◽  
pp. 105
Author(s):  
Aarti R. Gunjal ◽  
Ujjwala P. Chothe ◽  
Yogesh A. Sethi ◽  
Rajendra P. Panmand ◽  
Jalinder D. Ambekar ◽  
...  
Keyword(s):  
Field Emission ◽  
Current Density ◽  
Emission Current Density ◽  
Emission Current ◽  
Threshold Field ◽  
Light Illumination ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Morphological Studies ◽  
A Current

The three-dimensional hierarchical SrS/Bi2S3 heterostructures were synthesized by a template-free single-step hydrothermal method. The structural and morphological studies revealed the formation of a single crystalline orthorhombic heterostructure with rod-like morphologies possessing a high aspect ratio. The field emission properties of SrS/Bi2S3 nanorods were investigated. J–E and the Fowler–Nordheim (F–N) plot, as well as long-term field emission (FE) stability, were studied. SrS/Bi2S3 nanoflowers have enhanced the FE properties more than the virgin Bi2S3. The observed values of the re-producible turn-on field for SrS/Bi2S3 defined to draw an emission current density of ca. 1 µA/cm2 were found to be ca. 2.50 V/µm, and of the threshold field to draw a current density of ca. 10 µA/cm2 were found to be ca. 3.00 V/µm (without visible light illumination). A maximum emission current density of ca. 527 μA/cm2 was drawn without light and a current density of ca. 1078 μA/cm2 with light, which is higher than that of pristine Bi2S3.

Optical and Electron Emission Properties of h-BN Films Codoped with Mg and O Atoms

2013 ◽  
Vol 566 ◽  
pp. 175-178
Author(s):  
Shinji Ohtani ◽  
Kenkichiro Kobayashi
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Electron Emission ◽  
Electron Field Emission ◽  
Emission Properties ◽  
Electron Field ◽  
Quartz Substrates ◽  
Lower Electric Field

Films of hexagonal BN (h-BN) codoped with Mg and O atoms were grown on n-type Si and quartz substrates heated at 500 °C by sputtering targets consisting of h-BN and MgO powders. An absorption is seen at a wavelength < 400 nm for h-BN films prepared in an Ar atmosphere. In contrast, films prepared from the target containing 0.25 mol% MgO in an atmosphere of Ar + 1% O2 shows an absorption at a wavelength < 260 nm and an electron field emission at a lower electric field of 3.6 V/μm.

First-Principles Study of Field Emission Properties of Graphene-ZnO Nanocomposite

2010 ◽  
Vol 114 (45) ◽  
pp. 19284-19288 ◽  
Author(s):  
Shengli Zhang ◽  
Yonghong Zhang ◽  
Shiping Huang ◽  
Hui Liu ◽  
Peng Wang ◽  
...  
Keyword(s):  
Field Emission ◽  
First Principles ◽  
Emission Properties ◽  
Field Emission Properties ◽  
First Principles Study
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