Tuning the work function of randomly oriented ZnO nanostructures by capping with faceted Au nanostructure and oxygen defects: enhanced field emission experiments and DFT studies

A high-efficiency triode structure field emission planar light source was fabricated using optimized tetrapod-like ZnO nanostructures as field emitters.

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Work Function of Tungsten Single Crystal Planes Measured by the Field Emission Microscope

Journal of Applied Physics ◽

10.1063/1.1722081 ◽

1955 ◽

Vol 26 (6) ◽

pp. 732-737 ◽

Cited By ~ 146

Author(s):

Erwin W. Müller

Keyword(s):

Single Crystal ◽

Work Function ◽

Field Emission ◽

Tungsten Single Crystal

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Field Emission from Carbon Films Deposited by VHF CVD on Different Substrates

MRS Proceedings ◽

10.1557/proc-558-595 ◽

1999 ◽

Vol 558 ◽

Author(s):

A.I. Kosarev ◽

A.S. Abramov ◽

A.J. Vinogradov ◽

M.V. Shutov ◽

T.E. Felter ◽

...

Keyword(s):

Work Function ◽

Field Emission ◽

Low Temperatures ◽

Carbon Films ◽

Emission Characteristics ◽

Back Contact ◽

Contact Material ◽

Si Substrates

ABSTRACTAs previously demonstrated, non-diamond carbon (NDC) films deposited at low temperatures 200-300 °C on silicon tips reduced the threshold of field emission. In this paper we will present the results of the study of field emission from flat NDC films prepared by VHF CVD. Emission measurements were performed in a diode configuration at approximately 10−10 Torr. NDC films were deposited on ceramic and on c-Si substrates sputter coated with layers of Ti, Cu, Ni and Pt. The back contact material influences the emission characteristics but not as a direct correlation to work function. A model of field emission from metal-NDC film structures will be discussed.

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Stable Emission Characteristics of Low Work Function Amorphous Carbon Coated Transfer Mold Nickel Field Emitter Arrays in Harsh Environment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.222.138 ◽

2011 ◽

Vol 222 ◽

pp. 138-141

Author(s):

Masayuki Nakamoto ◽

Jong Hyun Moon

Keyword(s):

Work Function ◽

Field Emission ◽

Amorphous Carbon ◽

Oxygen Radical ◽

Harsh Environments ◽

Satellite Orbits ◽

Emission Characteristics ◽

Field Emitter ◽

Radical Treatment ◽

Field Emitter Arrays

Low work function amorphous carbon Transfer Mold field emitter arrays (a-C-FEAs) have been fabricated by combining the Transfer Mold emitter fabrication method and the emitter material coating method to realize stable vacuum nanoelectronic devices in harsh environments of aerospace. The emitter tips of a-C-FEAs are extremely sharpened to 26.7-30.7 nm of tip radii. Work function of a-C-FEAs was as low as 3.6 eV compared with those of conventional emitter materials such as carbon nanotube of 5.0 eV. Oxygen radical flux intensity of 1015 atoms/cm2•sec was used for the evaluation of field emission characteristics, whose value is 107-108 times higher than those of 107-108 atoms/cm2•sec in aerospace of satellite orbits. As the oxygen radical treatment time increased, turn-on fields of Ni-FEAs exhibited the 2.2 times degradation from 14.9 V/µm to 32.7 V/µm. Those of a-C-FEAs have been keeping almost the same value of 20.8-23.7 V/µm after oxygen radical treatment. The a-C-FEAs exhibit stable field emission characteristics in harsh environments.

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