Formation of δ-Al2O3hollow nanoparticles via a chemical vapor condensation process

2007 ◽  
Vol 98 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Chang-Woo Lee ◽  
Jai-Sung Lee
Keyword(s):  
Chemical Vapor ◽  
Vapor Condensation ◽  
Condensation Process ◽  
Chemical Vapor Condensation

One-step synthesis and properties of MnOx/TiO2 nanocomposites prepared by chemical vapor condensation process

2013 ◽  
Vol 233 ◽  
pp. 131-136 ◽  
Author(s):  
Eunseuk Park ◽  
Sungmin Chin ◽  
Yeon Seok Kim ◽  
Gwi-Nam Bae ◽  
Jongsoo Jurng
Keyword(s):  
Chemical Vapor ◽  
Vapor Condensation ◽  
Condensation Process ◽  
Chemical Vapor Condensation ◽  
One Step

Synthesis of Metal Oxide Hollow Nanoparticles by Chemical Vapor Condensation Process

2006 ◽  
Vol 317-318 ◽  
pp. 219-222 ◽  
Author(s):  
C.W. Lee ◽  
S.G. Kim ◽  
Jai Sung Lee
Keyword(s):  
Iron Oxide ◽  
Reaction Temperature ◽  
Chemical Vapor ◽  
Phase Evolution ◽  
Vapor Condensation ◽  
Condensation Process ◽  
Iron Oxide Particles ◽  
Hollow Nanoparticles ◽  
Chemical Vapor Condensation ◽  
Oxide Phases

The influence of reaction temperature on phase evolution of iron oxide hollow nanoparticles during chemical vapor condensation (CVC) process using iron acetylacetonate was investigated. X-ray diffraction (XRD) analyses revealed that three iron oxide phases (α-Fe2O3, γ-Fe2O3, and Fe3O4) and a mixture of β-Fe2O3 and small amount of γ-Fe2O3 were synthesized at 700oC and 900oC, respectively. TEM observation disclosed that the iron oxide particles are almost composed of hollow structured nanoparticles of 10~20 nm in size and 3~5 nm in shell thickness. This result implies that reaction temperature determining various reaction parameters plays an important role for the phase- and structural evolutions of iron oxide hollow nanoparticles. Especially, the present investigation attempted to explain temperature dependence of the phase evolution of β-Fe2O3 hollow nanoparticles in association with the decomposition of iron acetylacetonate.

Consideration of Fe Nanoparticles and Nanowires Synthesized by Chemical Vapor Condensation Process

2007 ◽  
Vol 534-536 ◽  
pp. 29-32 ◽  
Author(s):  
Jong Keun Ha ◽  
Kwon Koo Cho ◽  
Ki Won Kim ◽  
Tae Hyun Nam ◽  
Hyo Jun Ahn ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Chemical Vapor ◽  
Vapor Condensation ◽  
Condensation Process ◽  
Scale Production ◽  
Transmission Microscopy ◽  
Organic Precursor ◽  
Chemical Vapor Condensation ◽  
Mechanical Methods ◽  
Wide Range

Various physical, chemical and mechanical methods, such as inert gas condensation, chemical vapor condensation, sol-gel, pulsed wire evaporation, evaporation technique, and mechanical alloying have been used to synthesize nanoparticles. Among them, chemical vapor condensation(CVC) represents the benefit for its applicability to almost materials because a wide range of precursors are available for large-scale production with a non-agglomerated state. In this work, iron nanoparticles and nanowires have synthesized by chemical vapor condensation(CVC) process, using iron pentacarbonyl(Fe(CO)5) as precursor. The effects of processing parameters on the morphology, microstructure and size of iron nanoparticles and nanowires were studied. Iron nanoparticles and nanowires having various diameters were obtained by controlling the inflow of metallic organic precursor. Both nanoparticles and nanowires were crystallized. Characterization of obtained nanoparticles and nanowires were investigated by using a field emission scanning electron microscopy, transmission microscopy and X-ray diffraction.

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