Influence of Nucleation Rate on the Yield of ZnO Nanocrystals Prepared by Chemical Vapor Synthesis

2010 ◽  
Vol 114 (13) ◽  
pp. 5721-5726 ◽  
Author(s):  
Moazzam Ali ◽  
Markus Winterer
Keyword(s):  
Nucleation Rate ◽  
Chemical Vapor ◽  
Chemical Vapor Synthesis ◽  
Zno Nanocrystals

A Novel Approach for Chemical Vapor Synthesis of ZnO Nanocrystals: Optimization of Yield, Crystallinity

2009 ◽  
Vol 15 (7-9) ◽  
pp. 192-198 ◽  
Author(s):  
Moazzam Ali ◽  
Nina Friedenberger ◽  
Marina Spasova ◽  
Markus Winterer
Keyword(s):  
Chemical Vapor ◽  
Chemical Vapor Synthesis ◽  
Zno Nanocrystals ◽  
Novel Approach

Nanocrystalline Zirconia Surface-Doped with Alumina: Chemical Vapor Synthesis, Characterization, and Properties

2001 ◽  
Vol 84 (12) ◽  
pp. 2771-2776 ◽  
Author(s):  
Vladimir V. Srdić ◽  
Markus Winterer ◽  
Andreas Möller ◽  
G. Miehe ◽  
Horst Hahn
Keyword(s):  
Chemical Vapor ◽  
Chemical Vapor Synthesis ◽  
Nanocrystalline Zirconia

scholarly journals Chemical Vapor Synthesis of Size-Selected Zinc Oxide Nanoparticles

Small ◽  
2005 ◽  
Vol 1 (5) ◽  
pp. 540-552 ◽  
Author(s):  
Sebastian Polarz ◽  
Abhijit Roy ◽  
Michael Merz ◽  
Simon Halm ◽  
Detlef Schröder ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Chemical Vapor ◽  
Oxide Nanoparticles ◽  
Chemical Vapor Synthesis

Different zirconia-alumina nanopowders by modifications of chemical vapor synthesis

1999 ◽  
Vol 12 (1-4) ◽  
pp. 95-100 ◽  
Author(s):  
V.V. Srdic ◽  
M. Winterer ◽  
G. Miehe ◽  
H. Hahn
Keyword(s):  
Chemical Vapor ◽  
Chemical Vapor Synthesis

Nanoparticles generated by combining hot wall and microwave plasma chemical vapor synthesis

MRS Advances ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 213-218
Author(s):  
Alexander Levish ◽  
Markus Winterer
Keyword(s):  
Iron Oxide ◽  
Microwave Plasma ◽  
Plasma Reactor ◽  
Chemical Vapor ◽  
Process Window ◽  
Chemical Vapor Synthesis ◽  
Second Stage ◽  
Structure Surface ◽  
Oxide Phases ◽  
Precursor Decomposition

ABSTRACTControlling the oxidation state of iron and the crystal structure of iron containing compounds is the key to improved materials such as iron oxide nanoparticles for cancer treatment or heterogeneous catalysis. Iron oxides contain iron in different oxidation states and form different phases for one valence state (α-Fe3+2O2-3, β- Fe3+2O-32, etc.). Chemical vapor synthesis (CVS) allows the reproducible production of pure nanocrystals with narrow size distribution where particle formation and growth take place in the gas phase. Through the controlled variation of synthesis parameters CVS enables the synthesis of diverse iron oxide phases. In this study the energy for the CVS process is supplied by a hot wall furnace and a microwave plasma. The advantage of an plasma reactor as the first CVS stage is the fast and complete precursor decomposition at low temperatures. This results in a larger process window for the hot wall reactor in the second stage. The nanoparticles are examined regarding their structure, surface and valence by XRD and TEM.

Chemical vapor synthesis and luminescence properties of nanocrystalline cubic Y2O3:Eu

1999 ◽  
Vol 86 (6) ◽  
pp. 3129-3133 ◽  
Author(s):  
A. Konrad ◽  
T. Fries ◽  
A. Gahn ◽  
F. Kummer ◽  
U. Herr ◽  
...  
Keyword(s):  
Chemical Vapor ◽  
Luminescence Properties ◽  
Chemical Vapor Synthesis

Chemical vapor synthesis and characterization of chromium doped zinc oxide nanoparticles

2007 ◽  
Vol 27 (13-15) ◽  
pp. 4333-4337 ◽  
Author(s):  
Wei Jin ◽  
In-Kyum Lee ◽  
Alexander Kompch ◽  
Udo Dörfler ◽  
Markus Winterer
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Chemical Vapor ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Chemical Vapor Synthesis

Influence of the Time-Temperatur-Profile on Powder Characteristics of Nanocrystalline Anatase (TiO2) produced by Chemical Vapor Synthesis

2007 ◽  
Vol 1056 ◽  
Author(s):  
Ruzica Djenadic ◽  
Sankhanilay Roy Chowdhury ◽  
Marina Spasova ◽  
Andreas Gondorf ◽  
Erdal Akyildiz ◽  
...  
Keyword(s):  
Gas Flow ◽  
Flow Reactor ◽  
Chemical Vapor ◽  
Titanium Isopropoxide ◽  
Degree Of Crystallinity ◽  
Chemical Vapor Synthesis ◽  
Nanocrystalline Particles ◽  
Powder Characteristics ◽  
Gas Flow Reactor ◽  
Nanocrystalline Anatase Tio2

ABSTRACTChemical Vapor Synthesis (CVS) is the conversion of molecular species into nanocrystalline particles by chemical reactions in a gas flow reactor. Pure anatase nanoparticles are generated in a hot wall reactor from titanium isopropoxide using different time-temperature-profiles. The time-temperature-profile (T(t)-profile) in the gas phase of the reactor has a profound influence on the particle characteristics such as particle microstructure and surface chemistry and, therefore, on the quality of the powder consisting of nanocrystalline particles. In this study a simple reaction-coagulation-sintering model (CVSSIN) was used to predict influence of the T(t)-profile on the powder characteristics. The as-synthesized anatase powders show a very high degree of crystallinity, primary particle of about 10 nm sizes and a low degree of agglomeration.

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