期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 1, 期 9, 页码 1472-1480出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz100288z
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资金
- NSF [DMR 0548232]
- Sloan Research
- Research Corporation
- DOE [DE-FG02-09ER46664]
- Exxon Mobil Solid State Chemistry Fellowship
- DuPont
- NSEC [DMR 04258800832760]
- 3M Graduate Research Fellowship
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [832760] Funding Source: National Science Foundation
We discuss a nanowire and nanotube formation mechanism in which axial screw dislocations provide self-perpetuating steps to enable one-dimensional (1D) crystal growth, unlike previously understood vapor-liquid-solid (VLS) or analogous metal-catalyzed growth. We initially found this mechanism in hierarchical pine tree PbS nanowires with helically rotating branches. We further applied it to ZnO demonstrating that screw dislocations can drive the spontaneous formation of nanotubes and used classical crystal growth theory to confirm that their anisotropic 1D growth is drived by dislocation Dislocation-driven growth should be general to many materials grown in vapor or solution and is underappreciated. It will create a new dimension in the rational synthesis of nanomaterials. The resulting complex hierarchical nanostructures can be useful for solar energy conversion, and our understanding will allow large-scale synthesis of 1D nanomaterials for practical applications.
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