Steady growth of nanowires via the vapor-liquid-solid method

被引：0

作者：

Roper, Steven M. ^{[1
]}

Davis, Stephen H. ^{[1
]}

Norris, Scott A. ^{[1
]}

Golovin, Alexander A. ^{[1
]}

Voorhees, Peter W. ^{[2
]}

Weiss, Mark ^{[2
]}

机构：

[1] Engineering Sciences and Applied Mathematics, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3125

[2] Materials Science and Engineering, Northwestern University, 2225 Campus Drive, Evanston, IL 60208-3030

来源：

Journal of Applied Physics | 2007年 / 102卷 / 03期

关键词：

Understanding the dynamics of the growth of nanowires by the vapor-liquid-solid (VLS) process is essential in order to relate the properties of the wire to their processing conditions. A theory for VLS growth is developed that incorporates the surface energy of the solid-liquid; liquid-vapor; and solid-vapor interfaces; allows for supersaturation of growth material in the droplet; and employs contact-line conditions. We predict the profile of catalyst concentration in the droplet; the degree of supersaturation; and the modification to the shape of the solid-liquid interface due to growth; as functions of the material properties and process parameters. Under typical experimental conditions the interface deflection due to growth is predicted to be practically zero. We also find that the growth rate of the wire inherits the same dependence on diameter as the flux of growth material at the liquid-vapor interface; thus; if we assume that the flux is independent of radius; we obtain a growth rate that is also independent of radius. To make a prediction about the actual variation with diameter requires a detailed knowledge of the decomposition kinetics at the liquid-vapor interface. © 2007 American Institute of Physics;

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摘要：

Journal article (JA)

引用

共 2 条

[1] OPPORTUNITIES OF PCEAS MODEL FOR CALCULATION OF PHASE EQUILIBRIA LIQUID-SOLID AND LIQUID-VAPOR AT CONSTANT PRESSURE
Korchuganova, M. R.
Esina, Z. N.
Murashkin, V. V.
IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA, 2014, 57 (01): : 43 - +
[2] Comparison of simple perturbation-theory estimates for the liquid-solid and the liquid-vapor interfacial free energies of Lennard-Jones systems
Valeriani, C.
Wang, Z. -J.
Frenkel, D.
MOLECULAR SIMULATION, 2007, 33 (13) : 1023 - 1028

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