Preparation of Spherical Titania Nanoparticles by CO2 Laser Evaporation and Process‐Integrated Particle Coating
Identifieur interne : 005D72 ( Istex/Corpus ); précédent : 005D71; suivant : 005D73Preparation of Spherical Titania Nanoparticles by CO2 Laser Evaporation and Process‐Integrated Particle Coating
Auteurs : Heinz-Dieter Kurland ; Christian Stötzel ; Janet Grabow ; Ingmar Zink ; Eberhard Müller ; Gisbert Staupendahl ; Frank A. MüllerSource :
- Journal of the American Ceramic Society [ 0002-7820 ] ; 2010-05.
English descriptors
- KwdEn :
- Additive, Additive vapor, Aerosol, Aerosol particles, Agglomerate, Agglomerate sizes, Anatase, Anatase nanoparticles, Anatase particles, Apatite formation, Atmospheric pressure, Biomedical applications, Carboxylic acid, Chem, Coagulation, Condensation nuclei, Condensation particle counter, Condensation zone, Continuous laser radiation, Continuous radiation, Crystallite, Crystallite sizes, Density distributions, Diffraction measurements, Discrete values, Droplet, Equilibrium conditions, Evaporation, Evaporation rate, Evaporation zone, Flame spray pyrolysis, Gmbh, Grimm aerosol technik gmbh, Interaction zone, International gmbh, Laser, Laser ablation, Laser evaporation, Laser power, Laser pulse length, Laser radiation, Laser regime, Laser vaporization, Lava, Lava laboratory setup, Lava method, Lava process, Lava process parameters, Lower curve, Ltering unit, Magnetic iron oxide nanopowders, Mater, Materials research society, Materials science, Mobility diameter, Mobility diameter distributions, Mobility diameters, Nanoparticles, Nanopowder, Nanopowders, Nanoscaled particles, Nanoscaled powders, Nonaqueous solvents, Nucleation zone, Number basis, Optical properties, Organic layer, Organic layer materials, Organic solvents, Owing carrier, Particle, Particle aerosol, Particle coating, Particle diameter distributions, Particle diameters, Particle formation, Phase condensation, Powder samples, Primary particles, Process parameters, Pulse lengths, Raman spectrometry, Rapid quenching, Rate vadd, Rutile, Sample aerosol, Scanning mobility particle sizer, Shaker verlag, Sinter necks, Size distributions, Smaller agglomerates, Smps, Smps measurements, Soft agglomerates, Solar cells, Solar energy conversion, Spherical particles, Spherical shape, Standard deviations, Stearic, Stearic acid, Stretch bands, Surface areas, Surface condensation, Surface energy, Tio2, Tio2 nanoparticles, Tio2 particle aerosols, Tio2 particles, Tio2 powder, Titania, Titania nanoparticles, Titania nanopowders, Titania particles, Total range, Total volume, Transmission electron, Transmission electron microscopy, Upper curve, Vadd, Volume concentration, Waals forces.
- Teeft :
- Additive, Additive vapor, Aerosol, Aerosol particles, Agglomerate, Agglomerate sizes, Anatase, Anatase nanoparticles, Anatase particles, Apatite formation, Atmospheric pressure, Biomedical applications, Carboxylic acid, Chem, Coagulation, Condensation nuclei, Condensation particle counter, Condensation zone, Continuous laser radiation, Continuous radiation, Crystallite, Crystallite sizes, Density distributions, Diffraction measurements, Discrete values, Droplet, Equilibrium conditions, Evaporation, Evaporation rate, Evaporation zone, Flame spray pyrolysis, Gmbh, Grimm aerosol technik gmbh, Interaction zone, International gmbh, Laser, Laser ablation, Laser evaporation, Laser power, Laser pulse length, Laser radiation, Laser regime, Laser vaporization, Lava, Lava laboratory setup, Lava method, Lava process, Lava process parameters, Lower curve, Ltering unit, Magnetic iron oxide nanopowders, Mater, Materials research society, Materials science, Mobility diameter, Mobility diameter distributions, Mobility diameters, Nanoparticles, Nanopowder, Nanopowders, Nanoscaled particles, Nanoscaled powders, Nonaqueous solvents, Nucleation zone, Number basis, Optical properties, Organic layer, Organic layer materials, Organic solvents, Owing carrier, Particle, Particle aerosol, Particle coating, Particle diameter distributions, Particle diameters, Particle formation, Phase condensation, Powder samples, Primary particles, Process parameters, Pulse lengths, Raman spectrometry, Rapid quenching, Rate vadd, Rutile, Sample aerosol, Scanning mobility particle sizer, Shaker verlag, Sinter necks, Size distributions, Smaller agglomerates, Smps, Smps measurements, Soft agglomerates, Solar cells, Solar energy conversion, Spherical particles, Spherical shape, Standard deviations, Stearic, Stearic acid, Stretch bands, Surface areas, Surface condensation, Surface energy, Tio2, Tio2 nanoparticles, Tio2 particle aerosols, Tio2 particles, Tio2 powder, Titania, Titania nanoparticles, Titania nanopowders, Titania particles, Total range, Total volume, Transmission electron, Transmission electron microscopy, Upper curve, Vadd, Volume concentration, Waals forces.
Abstract
The CO2 laser vaporization (LAVA) method was used to prepare titania nanopowders. Because this versatile method does not require special precursors, a coarse anatase raw powder was applied as starting material. Powder samples produced under varied process parameters were characterized by transmission electron microscopy (TEM), X‐ray diffraction measurements, and Brunauer–Emmett–Teller surface area measurements. The laser‐generated powders consist of spherical, single crystalline and pure anatase nanoparticles, merely softly agglomerated by weak van der Waals forces. Using TEM analysis, the influence of the process parameters on the resulting particle size distribution was investigated. The results are discussed with respect to the particle formation by gas phase condensation. The potential of a process integrated, i.e. in situ, coating procedure for the surface modification of the anatase nanoparticles is demonstrated. As an exemplary representative of organic layer materials stearic acid was chosen. The organic coating was characterized by TEM and Raman spectrometry. Because of the unavoidable soft agglomeration the coating covers entire agglomerates rather than individual primary particles. Thus, the influence of the LAVA process parameters on the agglomerate sizes was systematically studied using a scanning mobility particle sizer.
Url:
DOI: 10.1111/j.1551-2916.2009.03589.x
Links to Exploration step
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Laser Evaporation and Process‐Integrated Particle Coating</title>
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<term>Additive vapor</term>
<term>Aerosol</term>
<term>Aerosol particles</term>
<term>Agglomerate</term>
<term>Agglomerate sizes</term>
<term>Anatase</term>
<term>Anatase nanoparticles</term>
<term>Anatase particles</term>
<term>Apatite formation</term>
<term>Atmospheric pressure</term>
<term>Biomedical applications</term>
<term>Carboxylic acid</term>
<term>Chem</term>
<term>Coagulation</term>
<term>Condensation nuclei</term>
<term>Condensation particle counter</term>
<term>Condensation zone</term>
<term>Continuous laser radiation</term>
<term>Continuous radiation</term>
<term>Crystallite</term>
<term>Crystallite sizes</term>
<term>Density distributions</term>
<term>Diffraction measurements</term>
<term>Discrete values</term>
<term>Droplet</term>
<term>Equilibrium conditions</term>
<term>Evaporation</term>
<term>Evaporation rate</term>
<term>Evaporation zone</term>
<term>Flame spray pyrolysis</term>
<term>Gmbh</term>
<term>Grimm aerosol technik gmbh</term>
<term>Interaction zone</term>
<term>International gmbh</term>
<term>Laser</term>
<term>Laser ablation</term>
<term>Laser evaporation</term>
<term>Laser power</term>
<term>Laser pulse length</term>
<term>Laser radiation</term>
<term>Laser regime</term>
<term>Laser vaporization</term>
<term>Lava</term>
<term>Lava laboratory setup</term>
<term>Lava method</term>
<term>Lava process</term>
<term>Lava process parameters</term>
<term>Lower curve</term>
<term>Ltering unit</term>
<term>Magnetic iron oxide nanopowders</term>
<term>Mater</term>
<term>Materials research society</term>
<term>Materials science</term>
<term>Mobility diameter</term>
<term>Mobility diameter distributions</term>
<term>Mobility diameters</term>
<term>Nanoparticles</term>
<term>Nanopowder</term>
<term>Nanopowders</term>
<term>Nanoscaled particles</term>
<term>Nanoscaled powders</term>
<term>Nonaqueous solvents</term>
<term>Nucleation zone</term>
<term>Number basis</term>
<term>Optical properties</term>
<term>Organic layer</term>
<term>Organic layer materials</term>
<term>Organic solvents</term>
<term>Owing carrier</term>
<term>Particle</term>
<term>Particle aerosol</term>
<term>Particle coating</term>
<term>Particle diameter distributions</term>
<term>Particle diameters</term>
<term>Particle formation</term>
<term>Phase condensation</term>
<term>Powder samples</term>
<term>Primary particles</term>
<term>Process parameters</term>
<term>Pulse lengths</term>
<term>Raman spectrometry</term>
<term>Rapid quenching</term>
<term>Rate vadd</term>
<term>Rutile</term>
<term>Sample aerosol</term>
<term>Scanning mobility particle sizer</term>
<term>Shaker verlag</term>
<term>Sinter necks</term>
<term>Size distributions</term>
<term>Smaller agglomerates</term>
<term>Smps</term>
<term>Smps measurements</term>
<term>Soft agglomerates</term>
<term>Solar cells</term>
<term>Solar energy conversion</term>
<term>Spherical particles</term>
<term>Spherical shape</term>
<term>Standard deviations</term>
<term>Stearic</term>
<term>Stearic acid</term>
<term>Stretch bands</term>
<term>Surface areas</term>
<term>Surface condensation</term>
<term>Surface energy</term>
<term>Tio2</term>
<term>Tio2 nanoparticles</term>
<term>Tio2 particle aerosols</term>
<term>Tio2 particles</term>
<term>Tio2 powder</term>
<term>Titania</term>
<term>Titania nanoparticles</term>
<term>Titania nanopowders</term>
<term>Titania particles</term>
<term>Total range</term>
<term>Total volume</term>
<term>Transmission electron</term>
<term>Transmission electron microscopy</term>
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<term>Vadd</term>
<term>Volume concentration</term>
<term>Waals forces</term>
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<term>Additive vapor</term>
<term>Aerosol</term>
<term>Aerosol particles</term>
<term>Agglomerate</term>
<term>Agglomerate sizes</term>
<term>Anatase</term>
<term>Anatase nanoparticles</term>
<term>Anatase particles</term>
<term>Apatite formation</term>
<term>Atmospheric pressure</term>
<term>Biomedical applications</term>
<term>Carboxylic acid</term>
<term>Chem</term>
<term>Coagulation</term>
<term>Condensation nuclei</term>
<term>Condensation particle counter</term>
<term>Condensation zone</term>
<term>Continuous laser radiation</term>
<term>Continuous radiation</term>
<term>Crystallite</term>
<term>Crystallite sizes</term>
<term>Density distributions</term>
<term>Diffraction measurements</term>
<term>Discrete values</term>
<term>Droplet</term>
<term>Equilibrium conditions</term>
<term>Evaporation</term>
<term>Evaporation rate</term>
<term>Evaporation zone</term>
<term>Flame spray pyrolysis</term>
<term>Gmbh</term>
<term>Grimm aerosol technik gmbh</term>
<term>Interaction zone</term>
<term>International gmbh</term>
<term>Laser</term>
<term>Laser ablation</term>
<term>Laser evaporation</term>
<term>Laser power</term>
<term>Laser pulse length</term>
<term>Laser radiation</term>
<term>Laser regime</term>
<term>Laser vaporization</term>
<term>Lava</term>
<term>Lava laboratory setup</term>
<term>Lava method</term>
<term>Lava process</term>
<term>Lava process parameters</term>
<term>Lower curve</term>
<term>Ltering unit</term>
<term>Magnetic iron oxide nanopowders</term>
<term>Mater</term>
<term>Materials research society</term>
<term>Materials science</term>
<term>Mobility diameter</term>
<term>Mobility diameter distributions</term>
<term>Mobility diameters</term>
<term>Nanoparticles</term>
<term>Nanopowder</term>
<term>Nanopowders</term>
<term>Nanoscaled particles</term>
<term>Nanoscaled powders</term>
<term>Nonaqueous solvents</term>
<term>Nucleation zone</term>
<term>Number basis</term>
<term>Optical properties</term>
<term>Organic layer</term>
<term>Organic layer materials</term>
<term>Organic solvents</term>
<term>Owing carrier</term>
<term>Particle</term>
<term>Particle aerosol</term>
<term>Particle coating</term>
<term>Particle diameter distributions</term>
<term>Particle diameters</term>
<term>Particle formation</term>
<term>Phase condensation</term>
<term>Powder samples</term>
<term>Primary particles</term>
<term>Process parameters</term>
<term>Pulse lengths</term>
<term>Raman spectrometry</term>
<term>Rapid quenching</term>
<term>Rate vadd</term>
<term>Rutile</term>
<term>Sample aerosol</term>
<term>Scanning mobility particle sizer</term>
<term>Shaker verlag</term>
<term>Sinter necks</term>
<term>Size distributions</term>
<term>Smaller agglomerates</term>
<term>Smps</term>
<term>Smps measurements</term>
<term>Soft agglomerates</term>
<term>Solar cells</term>
<term>Solar energy conversion</term>
<term>Spherical particles</term>
<term>Spherical shape</term>
<term>Standard deviations</term>
<term>Stearic</term>
<term>Stearic acid</term>
<term>Stretch bands</term>
<term>Surface areas</term>
<term>Surface condensation</term>
<term>Surface energy</term>
<term>Tio2</term>
<term>Tio2 nanoparticles</term>
<term>Tio2 particle aerosols</term>
<term>Tio2 particles</term>
<term>Tio2 powder</term>
<term>Titania</term>
<term>Titania nanoparticles</term>
<term>Titania nanopowders</term>
<term>Titania particles</term>
<term>Total range</term>
<term>Total volume</term>
<term>Transmission electron</term>
<term>Transmission electron microscopy</term>
<term>Upper curve</term>
<term>Vadd</term>
<term>Volume concentration</term>
<term>Waals forces</term>
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<front><div type="abstract">The CO2 laser vaporization (LAVA) method was used to prepare titania nanopowders. Because this versatile method does not require special precursors, a coarse anatase raw powder was applied as starting material. Powder samples produced under varied process parameters were characterized by transmission electron microscopy (TEM), X‐ray diffraction measurements, and Brunauer–Emmett–Teller surface area measurements. The laser‐generated powders consist of spherical, single crystalline and pure anatase nanoparticles, merely softly agglomerated by weak van der Waals forces. Using TEM analysis, the influence of the process parameters on the resulting particle size distribution was investigated. The results are discussed with respect to the particle formation by gas phase condensation. The potential of a process integrated, i.e. in situ, coating procedure for the surface modification of the anatase nanoparticles is demonstrated. As an exemplary representative of organic layer materials stearic acid was chosen. The organic coating was characterized by TEM and Raman spectrometry. Because of the unavoidable soft agglomeration the coating covers entire agglomerates rather than individual primary particles. Thus, the influence of the LAVA process parameters on the agglomerate sizes was systematically studied using a scanning mobility particle sizer.</div>
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<name type="personal"><namePart type="given">Gisbert</namePart>
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<affiliation>Institute of Materials Science and Technology, Friedrich‐Schiller‐University Jena, Jena 07743, Germany</affiliation>
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<name type="personal"><namePart type="given">Frank A.</namePart>
<namePart type="family">Müller</namePart>
<affiliation>Institute of Materials Science and Technology, Friedrich‐Schiller‐University Jena, Jena 07743, Germany</affiliation>
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<dateIssued encoding="w3cdtf">2010-05</dateIssued>
<edition>Manuscript No. 26859. Received September 22, 2009; approved December 2, 2009.</edition>
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<abstract>The CO2 laser vaporization (LAVA) method was used to prepare titania nanopowders. Because this versatile method does not require special precursors, a coarse anatase raw powder was applied as starting material. Powder samples produced under varied process parameters were characterized by transmission electron microscopy (TEM), X‐ray diffraction measurements, and Brunauer–Emmett–Teller surface area measurements. The laser‐generated powders consist of spherical, single crystalline and pure anatase nanoparticles, merely softly agglomerated by weak van der Waals forces. Using TEM analysis, the influence of the process parameters on the resulting particle size distribution was investigated. The results are discussed with respect to the particle formation by gas phase condensation. The potential of a process integrated, i.e. in situ, coating procedure for the surface modification of the anatase nanoparticles is demonstrated. As an exemplary representative of organic layer materials stearic acid was chosen. The organic coating was characterized by TEM and Raman spectrometry. Because of the unavoidable soft agglomeration the coating covers entire agglomerates rather than individual primary particles. Thus, the influence of the LAVA process parameters on the agglomerate sizes was systematically studied using a scanning mobility particle sizer.</abstract>
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<identifier type="ISSN">0002-7820</identifier>
<identifier type="eISSN">1551-2916</identifier>
<identifier type="DOI">10.1111/(ISSN)1551-2916</identifier>
<identifier type="PublisherID">JACE</identifier>
<part><date>2010</date>
<detail type="volume"><caption>vol.</caption>
<number>93</number>
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<detail type="issue"><caption>no.</caption>
<number>5</number>
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<extent unit="pages"><start>1282</start>
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<identifier type="DOI">10.1111/j.1551-2916.2009.03589.x</identifier>
<identifier type="ArticleID">JACE03589</identifier>
<accessCondition type="use and reproduction" contentType="copyright">© 2010 The American Ceramic Society</accessCondition>
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