8.4
Nanowires 255
8.4.1
Preliminaries 255
8.4.2
Synthetic Strategies 255
8.4.2.1 Vapor Phase Growth of Nanowires 256
8.4.2.2 Other Processes in the Gas Phase 262
8.4.2.3 Solution-Based Growth of Nanowires 265
8.4.2.4 Growth Control 273
8.4.3
Properties of Nanowires 274
References 275
9
Synthesis, Assembly and Reactivity of Metallic Nanorods 285
C. J. Murphy, N. R. Jana, L. A. Gearheart, S. O. Obare, K. K. Caswell,
S. Mann, C. J. Johnson, S. A. Davis, E. Dujardin, and K. J. Edler
9.1
Introduction 285
9.2
Seed-Mediated Growth Approach to the Synthesis of Inorganic Nanorods
and Nanowires 287
9.3
Assembly of Metallic Nanorods: Self-Assembly vs. Designed Chemical
Linkages 293
9.4
Reactivity of Metallic Nanoparticles Depends on Aspect Ratio 299
9.5
Conclusions and Future Prospects 304
Acknowledgements 306
References 306
10
Oxide-Assisted Growth of Silicon and Related Nanowires:
Growth Mechanism, Structure and Properties 308
S. T. Lee, R. Q. Zhang, and Y. Lifshitz
Abstract 308
10.1
Introduction 309
10.2
Oxide-Assisted Nanowire Growth 311
10.2.1 Discovery of Oxide-Assisted Growth 311
10.2.2 Oxide-Assisted Nucleation Mechanism 314
10.2.3 Oxide-Assisted Growth Mechanism 316
10.2.4 Comparison between Metal Catalyst VLS Growth and OAG 317
10.3
Control of SiNW Nanostructures in OAG 319
10.3.1 Morphology Control by Substrate Temperature 319
10.3.2 Diameter Control of Nanowires 326
10.3.3 Large-Area Aligned and Long SiNWs via Flow Control 328
10.3.4 Si Nanoribbons 330
10.4
Nanowires of Si Compounds by Multistep Oxide-Assisted Synthesis 332
10.4.1 Nanocables 332
10.4.2 Metal Silicide/SiNWs from Metal Vapor Vacuum Arc Implantation 333
10.4.3 Synthesis of Oriented SiC Nanowires 334
10.5
Implementation of OAG to Different Semiconducting Materials 335
10.6
Chemical Properties of SiNWs 340
10.6.1 Stability of H-Terminated SiNW Surfaces 340
Contents ix
Nanowires 255
8.4.1
Preliminaries 255
8.4.2
Synthetic Strategies 255
8.4.2.1 Vapor Phase Growth of Nanowires 256
8.4.2.2 Other Processes in the Gas Phase 262
8.4.2.3 Solution-Based Growth of Nanowires 265
8.4.2.4 Growth Control 273
8.4.3
Properties of Nanowires 274
References 275
9
Synthesis, Assembly and Reactivity of Metallic Nanorods 285
C. J. Murphy, N. R. Jana, L. A. Gearheart, S. O. Obare, K. K. Caswell,
S. Mann, C. J. Johnson, S. A. Davis, E. Dujardin, and K. J. Edler
9.1
Introduction 285
9.2
Seed-Mediated Growth Approach to the Synthesis of Inorganic Nanorods
and Nanowires 287
9.3
Assembly of Metallic Nanorods: Self-Assembly vs. Designed Chemical
Linkages 293
9.4
Reactivity of Metallic Nanoparticles Depends on Aspect Ratio 299
9.5
Conclusions and Future Prospects 304
Acknowledgements 306
References 306
10
Oxide-Assisted Growth of Silicon and Related Nanowires:
Growth Mechanism, Structure and Properties 308
S. T. Lee, R. Q. Zhang, and Y. Lifshitz
Abstract 308
10.1
Introduction 309
10.2
Oxide-Assisted Nanowire Growth 311
10.2.1 Discovery of Oxide-Assisted Growth 311
10.2.2 Oxide-Assisted Nucleation Mechanism 314
10.2.3 Oxide-Assisted Growth Mechanism 316
10.2.4 Comparison between Metal Catalyst VLS Growth and OAG 317
10.3
Control of SiNW Nanostructures in OAG 319
10.3.1 Morphology Control by Substrate Temperature 319
10.3.2 Diameter Control of Nanowires 326
10.3.3 Large-Area Aligned and Long SiNWs via Flow Control 328
10.3.4 Si Nanoribbons 330
10.4
Nanowires of Si Compounds by Multistep Oxide-Assisted Synthesis 332
10.4.1 Nanocables 332
10.4.2 Metal Silicide/SiNWs from Metal Vapor Vacuum Arc Implantation 333
10.4.3 Synthesis of Oriented SiC Nanowires 334
10.5
Implementation of OAG to Different Semiconducting Materials 335
10.6
Chemical Properties of SiNWs 340
10.6.1 Stability of H-Terminated SiNW Surfaces 340
Contents ix