Development of Single-Crystal α-Al2O3 Fibers by Vapor–Liquid–Solid Deposition (VLS) from Aluminum and Powdered Silica

Valcárcel, Víctor; Souto, Alejandro; Guitián, Francisco

doi:10.1002/(sici)1521-4095(199801)10:2<138::aid-adma138>3.3.co;2-1

Cited by 19 publications

(17 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nanowires were synthesized using vapor-liquidsolid ͑VLS͒ synthesis. 10,11 Indium nanodroplets were formed on an alumina substrate, which, together with an indium nugget and a reagent mixture consisting of metallic Ga and Ga 2 O 3 powder, were placed in a crucible and distributed such that the indium was downstream and the gallium/ gallium oxide mixture upstream of the alumina substrate. The reaction was carried out under flowing ammonia gas at 980°C in a tube furnace.…”

mentioning

confidence: 99%

“…Similar methods were previously reported for fabricating nanowires of various materials. [7][8][9][10][11] Nanowires of the desired average diameter were produced by varying the reaction temperature, while the mean nanowire length was determined by the reaction time. The GaN nanowires synthesized in this way are n type due to the presence of nitrogen vacancies and trace oxygen impurities.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Current rectification in a single GaN nanowire with a well-defined p–n junction

Cheng

Kolmakov

Zhang

et al. 2003

Applied Physics Letters

View full text Add to dashboard Cite

This letter discusses Mg incorporation in GaN nanowires with diameters ϳ35 nm, fabricated by vapor-liquid-solid synthesis in p-type nanowires. Turning on the Mg doping halfway through the synthesis produced nanowires with p-n junctions that showed excellent rectification properties down to 2.6 K. The nanowires are shown to possess good-quality, crystalline, hexagonal GaN inner cores surrounded by an amorphous GaN outer layer. Most wires grow such that the crystalline c axis is normal to the long axis of the nanowire. The temperature dependence of the current-voltage characteristics is consistent with electron tunneling through a voltage-dependent barrier.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Current rectification in a single GaN nanowire with a well-defined p–n junction

Cheng

Kolmakov

Zhang

et al. 2003

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…Much efforts have been invested in obtaining 1D nanostructured Al 2 O 3 materials 1–4 . Various 1D nanostructured Al 2 O 3 have been produced using vapor–liquid–solid (VLS) deposition, thermal treatment of aluminum with silica nanoparticles at a high temperature between 1300° and 1500°C, 5–8 pyrolysis of aluminumoxyhydride—HAlO at 1100°C 9 and using other 1D Al 2 O 3 nanomaterials as hard template 10,11 . The high cost and complicated procedures of these methods limit the fabrication of 1D nanostructures at large scale and hamper practical applications.…”

Section: Introductionmentioning

confidence: 99%

Solid‐Based Hydrothermal Synthesis and Characterization of Alumina Nanofibers with Controllable Aspect Ratios

Shen

Zhong

et al. 2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

Nanofibers of AlOOH with controllable aspect ratios have been synthesized by a facile steam-assisted solid-phase crystallization route. The morphology and aspect ratios of resulting AlOOH nanofibers were significantly influenced by the alkaline medium used in the preparation of solid precipitates from Al(NO 3 ) 3 solution. When tetramethylammonium hydroxide was used for precipitation, straight rod-like nanofibers with aspect ratios of 10-20 were obtained. The use of other tetra-alkylated ammonium hydroxides, such as tetraethylammonium hydroxide, tetrapropylammonium hydroxide or tetrabutylammonium hydroxide, led to the formation of long wire-like nanofibers with aspect ratios up to 150. After thermal treatment at 6001C, the morphologies of the one-dimensional nanostructures were well preserved while the crystal structure was converted to c-alumina. The wire-like nanofibers of alumina possessed higher thermal stability than alumina nanorods, and both exhibited much higher stability as compared with alumina micropowder. E. Suvaci-contributing editor

show abstract

“…Many wet‐chemical and physical methods have been set up for the preparation of alumina nanostructure. Various morphologies, such as whiskers, 15 fibers, 16 nanorods, 17 nanotrees, 18 nanotubes, 19 nanowires, and nanobelts 20 have been successfully prepared. Atomized liquid droplets or emulsions passing through a furnace or a thermal flame often give rise to hollow microspheres 21,22 .…”

Section: Introductionmentioning

confidence: 99%

Hollow Al₂O₃ Microspheres Derived from Al/AlOOH·nH₂O Core‐Shell Particles

Kou

Wang

Pan

et al. 2005

Journal of the American Ceramic Society

View full text Add to dashboard Cite

Hollow Al2O3 spheres with ∼2 μm in diameter and ∼200 nm in wall thickness were prepared successfully via the calcination of the Al/AlOOH·nH2O core‐shell particles, prepared by wet‐chemical method using commercial microscale aluminum powders as raw materials, at 900°–1100°C in air. X‐ray powder diffraction, differential scanning calorimetric analysis, scanning electron microscopy, and transmission electron microscopy were used to characterize the obtained samples, and the possible formation mechanism was discussed. These hollow Al2O3 microspheres may have promising applications in insulators, lightweight fillers, and catalyst carriers because of their unique hollow structure.

show abstract

Development of Single-Crystal α-Al2O3 Fibers by Vapor–Liquid–Solid Deposition (VLS) from Aluminum and Powdered Silica

Cited by 19 publications

References 0 publications

Current rectification in a single GaN nanowire with a well-defined p–n junction

Current rectification in a single GaN nanowire with a well-defined p–n junction

Solid‐Based Hydrothermal Synthesis and Characterization of Alumina Nanofibers with Controllable Aspect Ratios

Hollow Al₂O₃ Microspheres Derived from Al/AlOOH·nH₂O Core‐Shell Particles

Contact Info

Product

Resources

About

Development of Single-Crystal α-Al2O3 Fibers by Vapor–Liquid–Solid Deposition (VLS) from Aluminum and Powdered Silica

Cited by 19 publications

References 0 publications

Current rectification in a single GaN nanowire with a well-defined p–n junction

Current rectification in a single GaN nanowire with a well-defined p–n junction

Solid‐Based Hydrothermal Synthesis and Characterization of Alumina Nanofibers with Controllable Aspect Ratios

Hollow Al2O3 Microspheres Derived from Al/AlOOH·nH2O Core‐Shell Particles

Contact Info

Product

Resources

About

Hollow Al₂O₃ Microspheres Derived from Al/AlOOH·nH₂O Core‐Shell Particles