化工新型材料

化工新型材料 ›› 2017, Vol. 45 ›› Issue (9) : 111-113.

新材料与新技术

基于铜催化的无定形碳纳米管制备及场发射特性研究

^1,2

^1*

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Preparation and field emission characteristics of amorphous carbon nanotube based on copper catalysis

Huo Haibo^1,2, Ma Huali¹, Yang Weifei¹, Ding Pei¹, Zeng Fanguang¹

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文章历史 +

Received		Published
2016-12-26		2017-10-19
Issue Date	Revised Date
2017-10-19	2016-12-26

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摘要

采用化学气相沉积法(CVD)以酞菁铜(CuPc)为催化剂、甲烷为碳源在二氧化硅(SiO₂)基底上合成了碳纳米管薄膜(CNTs),经过扫描电镜(SEM)表征发现,合成的碳纳米管外径较大,范围约在140～280nm,长度约在10μm以上。拉曼光谱分析表明合成的碳纳米管为无定形(α-CNTs)结构。通过透射电镜(TEM)可以看出所制备α-CNTs管内中空,管壁厚度不均匀,约为20～100nm。采用二极管结构,在真空室中真空度为2×10^-4Pa时进行了场发射特性测试,测试结果表明SiO₂(α-CNTs)薄膜的场发射开启场强为1.05V/μm。通过计算得出薄膜的场增强因子为1.32×10⁴,结果表明SiO₂(α-CNTs)具有良好的场发射特性。

Abstract

The carbon nanotubes (CNTs) were synthesized on silica (SiO₂) substrate by chemical vapor deposition (CVD),used copper phthalocyanine (CuPc) as catalyst and methane as carbon source.The carbon nanotubes were characterized by field emission type scanning electron microscope (SEM),raman spectra and transmission electron microscope (TEM).The results showed that the carbon nanotubes had large outer diameter (140～280nm),the length of about 10 μm.The synthesized carbon nanotubes were amorphous nanotubes (α-CNTs) structure.It had a hollow structure and the tube wall thickness was not uniform,the range about 20 to 100nm.The field emission measurement was implemented with a diode structure in a vacuum chamber.The vacuum degree was 2×10^-4Pa.The result shows SiO₂ (α-CNTs) turn-on field electric intensity was 1.05V/μm.The field enhancement factor was 1.32×10⁴,It showed that SiO₂ (α-CNTs) had good field emission property.

关键词

无定形碳纳米管 / 酞菁铜 / 场发射

Key words

amorphous nanotube / copper phthalocyanine / field emission

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基于铜催化的无定形碳纳米管制备及场发射特性研究[J]. 化工新型材料, 2017, 45(9): 111-113 DOI:

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