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Влияние паров воды на синтез многослойных углеродных нанотрубок

Влияние паров воды на синтез многослойных углеродных нанотрубок

Abstract

Проведены исследования о влиянии паров воды на синтез углеродных нанотрубок методом термического каталитического осаждения из газовой фазы на подложке с предварительно нанесенным слоем железа 0.8 нм. В качестве газа прекурсора использовался метан, в качестве буферных газов аргон и водород. Синтезированы многослойные углеродные нанотрубки. Анализ углеродных нанотрубок методами спектроскопии комбинационного рассеяния и просвечивающей электронной микроскопии показал, что увеличение концентрации паров воды до 0,2‰ приводит к полному травлению аморфного углерода с поверхности углеродных нанотруб. При больших концентрациях паров воды 0,2-1‰ структура многослойных углеродных нанотрубок меняется на бамбуковую. При больших концентрациях воды (3‰) каталитический синтез углеродных наноструктур прекращается. Максимальное качество графитовых структур достигается при концентрации паров воды 0.35‰.

The effect of water vapor on carbon nanotubes, synthesized by the method of thermal catalytic deposition from the gas phase on a substrate, covered preliminary by the iron layer of 0.8 nm, was studied. Methane was used as a feedstock gas, hydrogen and argon as a buffer gases. The multilayer carbon nanotubes were synthesized. According to analysis of carbon nanotubes by the methods of Raman spectroscopy and transmission electron microscopy, increasing the concentration of water vapor up to 0,2 ‰ leads to complete etching of the amorphous carbon surface of the carbon nanotubes. At high concentrations of water vapor 0.2 1 ‰ structure of multi-walled carbon nanotubes changed to bamboo. The highest quality of graphite structures is achieved at water vapor concentration of 0.35 ‰.

Keywords

СУПЕРРОСТ, СПЕКТРОСКОПИЯ КОМБИНАЦИОННОГО РАССЕЯНИЯ, ТЕРМИЧЕСКОЕ РАЗЛОЖЕНИЕ УГЛЕВОДОРОДОВ, УГЛЕРОДНЫЕ НАНОТРУБКИ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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