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Search for "heat treatment" in Full Text gives 132 result(s) in Beilstein Journal of Nanotechnology.

Mesoporous MgTa2O6 thin films with enhanced photocatalytic activity: On the interplay between crystallinity and mesostructure

  • Jin-Ming Wu,
  • Igor Djerdj,
  • Till von Graberg and
  • Bernd M. Smarsly

Beilstein J. Nanotechnol. 2012, 3, 123–133, doi:10.3762/bjnano.3.13

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  • addressed the influence of the heat-treatment temperature (i.e., crystallite size) on the photocatalytic activity. Thereby, the influence of the crystallite size and mesostructural organization on the photocatalytic activity was systematically investigated by using dye degradation as a qualitative measure
  • deposition did not disturb the mesostructure. For comparison, multilayers of nontemplated films were studied by nitrogen physisorption. For such a PIB6000-templated mesoporous multilayer MgTa2O6 film with four single layers a BET surface area of ca. 260 m2 cm−3 was observed (after heat treatment at 790 °C
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Published 13 Feb 2012

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

  • Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

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  • deposition of boehmite (AlOOH·nH2O) on the exposed TiO2 domains. Then, a heat-treatment step converted the boehmite into Al2O3, while oxidizing the SAMs, forming a patterned TiO2–boehmite surface. A hydrophobic SAM was then attached to both types of domains, which then went through a second step of exposure
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Published 20 Dec 2011

Formation of SiC nanoparticles in an atmospheric microwave plasma

  • Martin Vennekamp,
  • Ingolf Bauer,
  • Matthias Groh,
  • Evgeni Sperling,
  • Susanne Ueberlein,
  • Maksym Myndyk,
  • Gerrit Mäder and
  • Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 665–673, doi:10.3762/bjnano.2.71

Graphical Abstract
  • formed in the reactive plasma, and the excess of carbon can be reduced by the attack of highly reactive H radicals, and hence CH4 is released [9]. To remove the excess carbon in the sample, we also performed a heat treatment of the materials. SiC is stable in air at temperatures up to 700 °C, while free
  • carbon is oxidized at temperatures between 530–680 °C [33]. After 2 hours at 700 °C the signals from the excess carbon disappeared, while SiO stretching modes showed up. During the heat treatment, the colour of the samples changed from dark to light grey. Applying temperatures above 700 °C or lower
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Published 07 Oct 2011

Nanostructured, mesoporous Au/TiO2 model catalysts – structure, stability and catalytic properties

  • Matthias Roos,
  • Dominique Böcking,
  • Kwabena Offeh Gyimah,
  • Gabriela Kucerova,
  • Joachim Bansmann,
  • Johannes Biskupek,
  • Ute Kaiser,
  • Nicola Hüsing and
  • R. Jürgen Behm

Beilstein J. Nanotechnol. 2011, 2, 593–606, doi:10.3762/bjnano.2.63

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  • morphology of the coating depends critically on the posttreatment temperature. As synthesized, the coatings possess an amorphous network structure comprising mesopores. The mesoscopic ordering of the pore system after the heat treatment was confirmed by small angle X-ray scattering, displaying a broad
  • maximum at 2Θ = 1.35, indicating repeating unit distances of 6.54 nm (data not shown). Upon calcination, the material crystallized and anatase nanocrystallites formed at temperatures above 350 °C; crystallization was completed with increasing temperature (600 °C). Further heat treatment resulted in the
  • formation of the thermodynamically stable polymorph rutile, with complete transformation from anatase to rutile at about 1000 °C (cf. Figure 3). Concomitantly with crystallization, the organized mesopore system collapsed during the heat treatment as expected when structure-directing agents, such as Pluronic
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Published 15 Sep 2011

Synthesis of LiNbO3 nanoparticles in a mesoporous matrix

  • Anett Grigas and
  • Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 28–33, doi:10.3762/bjnano.2.3

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  • while the heat treatment promotes crystallization. For material tailoring purposes the factors influencing the particle size under the reaction conditions on the size of the nanoparticles were considered. The IR furnace uses a lamp for indirect heat treatment and the wavelength can be tuned with the
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Published 10 Jan 2011

Magnetic coupling mechanisms in particle/thin film composite systems

  • Giovanni A. Badini Confalonieri,
  • Philipp Szary,
  • Durgamadhab Mishra,
  • Maria J. Benitez,
  • Mathias Feyen,
  • An Hui Lu,
  • Leonardo Agudo,
  • Gunther Eggeler,
  • Oleg Petracic and
  • Hartmut Zabel

Beilstein J. Nanotechnol. 2010, 1, 101–107, doi:10.3762/bjnano.1.12

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  • samples were annealed at 170 °C for 20 min in air in order to obtain mainly single phase maghemite (γ-Fe2O3) NPs as reported in Ref. [41]. After heat treatment, the NP monolayer was ion-milled with neutralized Ar-ions for 4 min in order to flatten the NP array and remove the oleic acid layer. Finally, a
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Published 01 Dec 2010

Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

  • Ulf Wiedwald,
  • Luyang Han,
  • Johannes Biskupek,
  • Ute Kaiser and
  • Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5

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  • ) the magnetostatic interaction of NPs is very small and consequently, individual magnetic properties can by extracted, and (ii) the larger distance between NPs allows their annealing as opposed to colloidal NPs where extended heat treatment leads to agglomeration [43]. This aspect is especially useful
  • 250 °C or 300 °C for small or large micelles, respectively. This heating proved advantageous for the nucleation and growth process of the desired NPs. After an exposure time of typically 30 min, the oxygen plasma and heat treatment were stopped and the plasma chamber pumped down to its base pressure
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Published 22 Nov 2010
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