Preparation of a miniature carbon nanotube paste emitter for very high resolution X-ray imaging

被引：36

作者：

Choi, Young Chul ^{[1
]}

Kang, Jun-Tae ^{[1
,3
]}

Park, Sora ^{[1
]}

Shin, Min-Sik ^{[1
,2
]}

Jeon, Hyojin ^{[1
,2
]}

Kim, Jae-Woo ^{[1
]}

Jeong, Jin-Woo ^{[1
]}

Song, Yoon-Ho ^{[1
,2
]}

机构：

[1] Elect & Telecommun Res Inst, Nanoelectron Source Creat Res Ctr, 218 Gajeong Ro, Daejeon 34129, South Korea

[2] Univ Sci & Technol, Sch Adv Device Engn, 217 Gajeong Ro, Daejeon 34113, South Korea

[3] Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea

来源：

CARBON | 2016年 / 100卷

关键词：

Carbon nanotube; Miniature paste emitter; Brightness; High resolution; X-ray imaging; FIELD-EMISSION PROPERTIES; UNIFORMITY;

D O I：

10.1016/j.carbon.2016.01.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A miniature carbon nanotube (CNT) paste emitter dot with a diameter of similar to 50 mu m was fabricated onto the cross-sectional surface of Kovar (nickel-cobalt ferrous alloy) rod without using a sophisticated photolithography. A highly adhesive CNT paste was prepared with silicon carbide and nickel nanoparticles, and then the small CNT emitter was fabricated by a novel and facile technique, called point contact method. The prepared emitter generates very high current density of similar to 11.2 A/cm(2) when measured using a diode configuration. We further observed for the first time the brightness of electron beam generated from the CNT paste emitter that is a more practical point electron source than the individual CNT emitter. The triode structure fabricated with a miniature CNT paste emitter and a gate aperture (20 mm in diameter) generated a collimated electron beam by which very high resolution (> 16 lp/mm) X-ray imaging was achieved. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：302 / 308

页数：7

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