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Carbon nanotubes and SiC whiskers in the pyrolysis of vapors of acetonitrile on nickel clusters deposited in the pores obtained with dressings tracks of heavy metal ions in the dielectric layers of SiO2 with single-crystal silicon substrates. The resulting structures were investigated by scanning electron microscopy and Raman spectroscopy, field emission characteristics are measured them.
Electrochemical deposition of nickel into the pores
Electrolyte 0.5 NiSO4 + 0.5 H3BO3 (U = 1B). The degree of filling is controlled by time.
Synthesis of carbon nanotubes (CNTs) by thermal decomposition of chemical compounds (CVD-method) for nickel nanoclusters in ion tracks
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| The resulting structure: when full time nickel nanoclusters synthesized SiC whiskers (root growth) |
The resulting structure: when full time nickel nanoclusters grow CNTs (apical growth) |
Current-voltage characteristics of the emission current of the samples (a) CNTs and (b) SiC whiskers were measured at interelectrode distances of 500 and 1000 microns. Red and black curves correspond to measurements at increasing and decreasing the sawtooth
It was found that the formation of nanotubes or SiC whiskers, as a result of catalytic pyrolysis of hydrocarbons is determined by the degree of filling of ion tracks clusters of nickel. Shown that the threshold for the appearance of electron emission is 1 V / m for both types of samples, differences in the shape of the current-voltage characteristics are explained by differences in the electronic structure of CNTs and SiC whiskers.
Cooperation
- Russia, Novosibirsk, 630090, Institute of Inorganic Chemistry. AV Nikolaeva, SB RAS, Ave. Acad. Lavrentieva, 3
- Novosibirsk State Technical University, Ave. Karl Marx 20, 630092 Novosibirsk, Russia
- Belarus, Minsk, 220050, Belarus State University, str. Leningrad, 14
- Germany, Berlin D-14109, Helmholtz Centre Berlin for Materials and Energy, str. Glienicker100
- Belarus, Minsk, 220072, Scientific and Practical Center for Material Sciences of Belarus, str. P.Brovki 19
- Russia, Moscow, 394026, Voronezh State Technical University, Ave. Moscow, 14
The project
Project on the Programme of Belarusian Republican Foundation for Fundamental Research "Nauka - MS"
Links to articles
А.В. Окотруб, А.Г. Куреня, А.В. Гусельников, А.Г. Кудашов, Л.Г. Булушева, А.С. Бердинский, Ю.А. Иванова, Д.К. Иванов, Е.А. Стрельцов, Д. Финк, А.В. Петров, Е.К. Белоногов, Автоэмиссионные свойства углеродных нанотрубок и SiC вискеров, синтезированных с использованием частиц Ni, осажденных в ионных треках SiO2 // Российские Нанотехнологии, 2009, том 4, № 9–10, стр. 16-21
A.V. Okotrub, A.G. Kurenya, A.V. Gusel’nikov, A.G. Kudashov, L.G. Bulusheva, A.S. Berdinskii, Yu.A. Ivanova, D.K. Ivanov, E.A. Strel’tsov, D. Fink, A.V. Petrov, E.K. Belonogov, The Field Emission Properties of Carbon Nanotubes and SiC Whiskers Synthesized over Ni Particles Deposited in Ion Tracks in SiO2 // Nanotechnologies in Russia, 2009, Vol. 4, № 9–10, pp. 627-633.
Демьянов С.Е., Канюков Е.Ю., Петров А.В., Белоногов Е.К., Наноструктуры систем Si/SiO2/металл с треками быстрых тяжелых ионов // Журнал «Известия РАН. Серия Физическая», 2008, том 72, №9, с.1262-1264.
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