Thermodynamic Analysis of Carbon Nucleation on a Metal Surface
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
2001 MRS Fall Meeting, Symposium Z - Making Functional Materials with Nanotubes
26-29 нояб. 2001
,
Boston, Massachusetts
|
| Сборник |
Making Functional Materials with Nanotubes : Symposium Z, November 26-29, 2001, Boston, Massachusetts, U.S.A.
Сборник,
Cambridge University Press. 2002.
ISBN 9781107411999.
|
| Журнал |
Materials Research Society Symposium Proceedings
ISSN: 0272-9172
|
| Вых. Данные |
Год: 2002,
Том: 706,
Страницы: 199-204
Страниц
: 6
DOI:
10.1557/PROC-706-Z6.22.1
|
| Авторы |
Kuznetsov V.L.
1
,
Usoltseva A.N.
1
,
Chuvilin A.L.
1
,
Obraztsova E.D.
2
,
Bonard J.
3
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, Lavrentieva 5, 630090 Novosibirsk, Russia
|
| 2 |
Institute of General Physics, 38 Vavilov Street, 117942 Moscow, Russia
|
| 3 |
Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, CH1015 Lausanne, Switzerland
|
|
A thermodynamic analysis of the carbon nucleation on the metal surface was performed. From the consideration of the catalytic mechanisms of carbon deposit formation on the metal surface we concluded that majority of these mechanisms include some common steps. The most important of them is the step of nucleation of carbon deposit on the metal surface. The master equation for the dependence of critical radius of the nucleus in reaction parameters was obtained. This equation demonstrates that a variation of the reaction parameters, such as the temperature, the nature of metal catalyst and the degree of supersaturation of the metal-carbon solution, can lead to the formation of different carbon deposits, such as filamentous carbon, multi-wall nanotubes (MWNT) or single-wall nanotubes (SWNT). The analysis performed allows us to conclude that for selective production of SWNT the nucleation must proceed at high temperature on the surface of liquid metal particles (Fe, Co, Ni). For solid metal particles (Mo) a high degree of supersaturation with carbon is also required.