论文信息 - Nucleation and Growth of Boron Nanowires on ZrB2 Particles

Nucleation and Growth of Boron Nanowires on ZrB2 Particles

Amorphous boron rich nanowires are grown on ZrB 2 particles using diborane as the gas precursor in a CVD process under 20 Torr pressure and at 900 °C. These nanowires have uniform diameters of tens of nanometers and lengths of up to several micrometers. The boron-rich nanowires are characterized and found to be composed of boron clusters containing unit cells of icosahedral B 12 . A surface nucleation and growth mechanism of solid boron from vapor phase is proposed to explain the nanowire growth. The role of ZrB 2 particles in the synthesis of the boron-rich nanostructures is also discussed.

[1] J. M. Cowley,et al. Crystalline boron nanowires. , 2002, Journal of the American Chemical Society.

[2] Lihuan Sun,et al. Well‐Aligned Boron Nanowire Arrays , 2001 .

[3] Campbell,et al. Boron carbide structure by Raman spectroscopy. , 1989, Physical review. B, Condensed matter.

[4] Yimei Zhu,et al. Synthesis of Pure Boron Single-Wall Nanotubes , 2004 .

[5] J. Albella,et al. Influence of Diborane Flow Rate on the Structure and Stability of CVD Boron Nitride Films , 1996 .

[6] M. Thorpe,et al. Vibrations in icosahedral boron molecules and in elemental boron solids , 1975 .

[7] Á. Rubio,et al. Boron quasicrystals and boron nanotubes : Ab initio study of various B96 isomers , 2000 .

[8] Kenji Kawaguchi,et al. Catalyst-free fabrication of single crystalline boron nanobelts by laser ablation , 2003 .

[9] Chun-Sing Lee,et al. Boron nanowires synthesized by laser ablation at high temperature , 2003 .

[10] Z. Zhang,et al. Nucleation and growth of feather-like boron nanowire nanojunctions , 2003 .

[11] M. Yumura,et al. Synthesis of crystalline boron nanowires by laser ablation. , 2002, Chemical communications.