Seed Concentration Control of Metal Nanowire Diameter

Gold/silver nanowires (NWs) of controlled diameters were synthesized from catalytic metal seed particles at the substrate/solution interface. Small seed nanoparticles of three different sizes: ∼1 nm (11 gold atoms), ∼1.4 nm (∼55 gold atoms), and homemade nanoparticles of ∼2 nm were used. By varying...

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Veröffentlicht in:	Nano letters 2012-11, Vol.12 (11), p.5552-5558
Hauptverfasser:	Azulai, Daniel, Cohen, Elad, Markovich, Gil
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Bundles Carbon - chemistry Catalysis Catalysts Condensed matter: structure, mechanical and thermal properties Copper - chemistry Cross-disciplinary physics: materials science rheology Deposition Electric Conductivity Electrodes Exact sciences and technology Gold Gold - chemistry Growth from solutions Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties Materials science Metal Nanoparticles - chemistry Methods of crystal growth physics of crystal growth Microscopy - methods Microscopy, Electron, Transmission - methods Nanocrystalline materials Nanoparticles Nanoscale materials and structures: fabrication and characterization Nanotechnology - methods Nanowires Nanowires - chemistry Optics and Photonics Particle Size Physics Quantum wires Seeds Silver - chemistry Surface-Active Agents - chemistry Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Time Factors
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Zusammenfassung:	Gold/silver nanowires (NWs) of controlled diameters were synthesized from catalytic metal seed particles at the substrate/solution interface. Small seed nanoparticles of three different sizes: ∼1 nm (11 gold atoms), ∼1.4 nm (∼55 gold atoms), and homemade nanoparticles of ∼2 nm were used. By varying a single type of seed particle concentration in the growth solution, the NW diameters and morphology could be controlled, between bundles of ultrathin NWs of ∼2–3 nm diameter to thicker isolated single NWs with a mean diameter of ∼16 nm. In addition, the catalytic reduction rate leading to NW growth was found to be seed size dependent at small seed sizes (
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl302484n