Thermionic and field electron emission from nanostructured carbon materials for energy conversion and vacuum electronics

被引：0

作者：

Koeck, FAM ^{[1
]}

Yang, YY ^{[1
]}

Nemanich, RJ ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

来源：

IECON 2005: THIRTY-FIRST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY, VOLS 1-3 | 2005年

关键词：

NANOCRYSTALLINE DIAMOND FILMS; CHEMICAL-VAPOR-DEPOSITION; TEMPERATURE; NANOTUBES; SITES;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

While initial interest in using diamond materials for electron emission was derived from the observation of a negative electron affinity of the material, the nanoscale structure of the material has proven to be critical to obtaining field emission at an applied field of less than 2V/mu m. This study presents topographic and emission site images of nanocrystalline diamond films. The results suggest that morphology variations are insufficient to explain the observed emission patterns. The thermionic properties of sulphur doped nanocrystalline diamond films and carbon nanotubes were measured and analyzed in terms of Schottky barrier lowering. The results indicated a general consistency of the field emission and thermionic emission from the same films. The potential for thermionic energy conversion based on these films is presented.

引用

页码：2389 / 2394

页数：6

共 20 条

[1] A cascade control strategy for a space nuclear reactor system [J].

Alvarez-Ramirez, J ;

Puebla, H ;

Espinosa, G .

ANNALS OF NUCLEAR ENERGY, 2001, 28 (02) :93-112

[2] Field penetration induced charge redistribution effects on the field emission properties of carbon nanotubes - a first-principle study [J].

Chen, CW ;

Lee, MH ;

Clark, SJ .

APPLIED SURFACE SCIENCE, 2004, 228 (1-4) :143-150

[3] Field emission site densities of nanostructured carbon films deposited by a cathodic arc [J].

Cui, JB ;

Robertson, J ;

Milne, WI .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (10) :5707-5711

[4] Electron emission from metals as a function of temperature [J].

Dushman, S .

PHYSICAL REVIEW, 1923, 21 (06) :0623-0636

[5] An experimental investigation of the performance of a thermionic converter with planar molybdenum electrodes for low temperature applications [J].

El-Genk, MS ;

Momozaki, Y .

ENERGY CONVERSION AND MANAGEMENT, 2002, 43 (07) :911-936

[6] Field emission properties of nanocrystalline chemically vapor deposited-diamond films [J].

Gröning, O ;

Küttel, OM ;

Gröning, P ;

Schlapbach, L .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1999, 17 (05) :1970-1986

[7] Properties and characterization of chemical vapor deposition diamond field emitters [J].

Gröning, O ;

Nilsson, LO ;

Gröning, P ;

Schlapbach, L .

SOLID-STATE ELECTRONICS, 2001, 45 (06) :929-944

[8] Direct correlation of surface morphology with electron emission sites for intrinsic nanocrystalline diamond films [J].

Köck, EM ;

Garguilo, JM ;

Nemanich, RJ .

[9] Spatial distribution of electron emission sites for sulfur doped and intrinsic nanocrystalline diamond films [J].

Köck, FAM ;

Garguilo, JM ;

Nemanich, RJ ;

Gupta, S ;

Weiner, BR ;

Morell, G .

[10] Enhanced low-temperature thermionic field emission from surface-treated N-doped diamond films [J].

Köck, FAM ;

Garguilo, JM ;

Brown, B ;

Nemanich, RJ .

← 1 2 →