Oxidation improvement of field electron emission from diamond nanomaterials

被引：2

作者：

Karabutov, AV

Gordeev, SK

Ralchenko, VG

Korchagina, SB

Maslakov, KI

Dementjev, AP

机构：

[1] Inst Gen Phys, Moscow 119991, Russia

[2] Cent Res Inst Mat, St Petersburg 191014, Russia

[3] RRC, Kurchatov Inst, IRTM, Moscow 123182, Russia

来源：

SURFACE AND INTERFACE ANALYSIS | 2004年 / 36卷 / 5-6期

关键词：

field electron emission; carbon; diamond; nanocomposite;

D O I：

10.1002/sia.1713

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：

Porous diamond/sp(2)-bonded carbon nanocomposites were studied to determine how their field electron emission properties and electrical conductivity depend on composition and post-growth treatment. It was found that a treatment enriching the nanocomposites with oxygen could significantly improve the field emission from the diamond samples. The oxidized composites exhibited lower emission threshold fields (E-th = 1-2 V mum(-1) compared with E-th = 4-6 V mum(-1) for non-oxidized samples) and improved emission uniformity (the number of emission sites per unit area). The composites with low sp(2)-bonded carbon content, i.e. the more porous samples, typically show better results. The structure of the samples was studied using a C KVV Auger spectrometer, with x-ray excitation of Auger emission. Possible reasons for the emission improvement by oxidation in this two-phase carbon system are discussed. Copyright (C) 2004 John Wiley Sons, Ltd.

引用

页码：455 / 460

页数：6

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