Morphology of Si nanowires fabricated by laser ablation using gold catalysts

Wang, K.; Chung, Sangyong; Kim, D.

doi:10.1007/s00339-004-2790-z

Cited by 15 publications

(12 citation statements)

References 9 publications

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“…Wires produced in the DTEM were similar to those produced using ex situ laser assisted growth experiments,9–14 yet did not require gas flow or resistive heating. The NW production was monitored in situ during pulsing using CW electron beam imaging in the DTEM.…”

mentioning

confidence: 79%

“…The vapor‐liquid solid (VLS) growth mechanism (Figure 1), first described by Wagner and co‐workers,1, 2 is a widely accepted description of how many 1D nanostructures are formed. VLS and similar models have been applied to such methods as hybrid pulsed‐laser ablation/chemical vapor deposition (PLA/CVD)9 and laser assisted NW growth at elevated temperatures,10–14 in which a pulsed laser ablates a target with gas flowing through the reaction chamber held at elevated temperature. These methods have successfully produced semiconductor and conducting oxide3 NWs with size control determined by the catalyst droplet diameter 4.…”

mentioning

confidence: 99%

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In Situ Laser Synthesis of Si Nanowires in the Dynamic TEM

Taheri

Reed

LaGrange

et al. 2008

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The dynamic transmission electron microscope (DTEM) is introduced as a novel tool for in situ nanowire (NW) synthesis and characterization. Initial results show crystalline Si NW production by a root‐based growth mechanism using a pulsed laser ablation (PLA) method inside the microscope column (see image). The potential of the DTEM to characterize the evolution of nanostructures by PLA methods is demonstrated.

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mentioning

confidence: 79%

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confidence: 99%

In Situ Laser Synthesis of Si Nanowires in the Dynamic TEM

Taheri

Reed

LaGrange

et al. 2008

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“…Silica nanowires containing gold nanoparticle chains were obtained under the harsh conditions of vapour-liquid-solid (VLS) growth. [2][3][4] For example, silica, 5 gallium oxide, 6 and magnesium oxide 7 nanowires containing gold nanoparticle chains were reported to show strong wavelength-dependent and reversible photoresponse so that they may be used as wavelength-controlled optical nanoswitches. Drawbacks of VLS-based approaches are the necessity of hightemperature steps and the limited range of accessible matrix materials.…”

Section: Introductionmentioning

confidence: 99%

Formation of gold nanoparticles in polymeric nanowires by low-temperature thermolysis of gold mesitylene

et al. 2012

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The formation of polymer nanowires containing metal nanoparticle chains by low-temperature thermolyses of metal precursors has remained challenging. We report the block copolymer-assisted generation of locally regular chains of quasi-spherical gold nanoparticles with narrow particle diameter distribution by mild thermolysis of the non-polar gold precursor gold mesitylene inside the cylindrical nanopores of self-ordered anodic aluminium oxide (AAO). The block copolymer separates the gold mesitylene as well as the developing gold nanoparticles from the AAO pore walls so that surface nucleation and pinning of gold clusters are prevented. Growing quasi-spherical gold nanoparticles locally deform the polymer chains irreversibly adsorbed on the AAO pore walls, and the polymer chains are pushed into the space between the gold nanoparticles. The gold nanoparticles have, therefore, larger diameters and smaller specific surface than hypothetical pluglike gold entities with the same volume, the formation of which is suppressed.

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“…[10][11][12][13] Hu et al report the Au nanoparticles embedded Silica NWs fabricated by using microreactor with Si and Au coated substrate. 13 These NWs have lower resistivity when they are exposed to a specific wavelength.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Silicon Oxide Nanowires Embedded with Au Nanoparticle or Au Nanowire: Its Use as Template to Hollow Silica Nanotube

Chung¹,

Chun²,

Kim³

2008

j nanosci nanotechnol

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Silicon oxide nanowires which contains Au nanoparticles or an Au nanowire were fabricated by thermal evaporation chemical vapor deposition method using Au as catalyst. Silicon oxide wafers were used as the collector. The diameters of silicon oxide nanowires range from 20 to 150 nm. The larger the diameter of Si nanowire is, the larger the diameter of embedded Au nanoparticles. The separation between Au nanoparticles increases with the diameter. Different forms of silicon oxide nanowires were observed at different growth temperature: silicon oxide nanowires embedded with Au-containing nanoparticles at 1250 degrees C and Au/silicon oxide coaxial nanocable at 1425 degrees C. Using KCN solution, the nanoparticles or the nanocable inside silicon oxide nanowires were extracted, leaving hollow silicon oxide nanotubes.

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Morphology of Si nanowires fabricated by laser ablation using gold catalysts

Cited by 15 publications

References 9 publications

In Situ Laser Synthesis of Si Nanowires in the Dynamic TEM

In Situ Laser Synthesis of Si Nanowires in the Dynamic TEM

Formation of gold nanoparticles in polymeric nanowires by low-temperature thermolysis of gold mesitylene

Fabrication of Silicon Oxide Nanowires Embedded with Au Nanoparticle or Au Nanowire: Its Use as Template to Hollow Silica Nanotube

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