ChemInform Abstract: Isothermal in situ Reduction Kinetics of CoCl2-SiO2 Gels to Co-SiO2 Nanocomposites.

Silica gcls containing NiCl2 and dextrose have been reduced by heat-treating the gels under N2 atmosphere at 800 °C, 850 °C, 900 °C, and 950 °C, respectively. The influence of the volume ratio of ethyl alcohol to tetraethylorthosilicate and the amount of dextrose on the in situ reduction kinetics of NiCl2 in gel matrix have been investigated. The kinetic data on in situ reduction have been analyzed by a reduced time method which indicates that mixed mechanisms are operative. The predominant mechanism of reduction of NiCl2 in SiO2 gel matrix is of nucleation and growth type. The activation energies over different temperatures and fraction converted have been computed by the integration method.

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Characterization and Crystallization Kinetics of in situ Prepared Poly(propylene terephthalate)/SiO2 Nanocomposites

Macromolecular Chemistry and Physics ◽

10.1002/macp.200900327 ◽

2009 ◽

Vol 211 (1) ◽

pp. 66-79 ◽

Cited By ~ 9

Author(s):

Dimitris S. Achilias ◽

Dimitrios N. Bikiaris ◽

Efthimios Papastergiadis ◽

Dimitris Giliopoulos ◽

George Z. Papageorgiou

Keyword(s):

Crystallization Kinetics ◽

Sio2 Nanocomposites ◽

Poly Propylene ◽

Kinetics Of

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Non-Isothermal Crystallisation Kinetics of In Situ Prepared Poly(ɛ-caprolactone)/Surface-Treated SiO2 Nanocomposites

Macromolecular Chemistry and Physics ◽

10.1002/macp.200600447 ◽

2007 ◽

Vol 208 (4) ◽

pp. 364-376 ◽

Cited By ~ 59

Author(s):

Alexandros A. Vassiliou ◽

George Z. Papageorgiou ◽

Dimitrios S. Achilias ◽

Dimitrios N. Bikiaris

Keyword(s):

Crystallisation Kinetics ◽

Sio2 Nanocomposites ◽

Isothermal Crystallisation ◽

Kinetics Of

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Performance modulation through selective, homogenous surface doping of lanthanum strontium ferrite electrodes revealed by in-situ PLD impedance measurements

Journal of Materials Chemistry A ◽

10.1039/d1ta08634k ◽

2021 ◽

Author(s):

Christoph Riedl ◽

Matthäus Siebenhofer ◽

Andreas Nenning ◽

Gernot Friedbacher ◽

Maximilian Weiss ◽

...

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Solid Oxide ◽

Reduction Kinetics ◽

Oxide Fuel ◽

Impedance Measurements ◽

Lanthanum Strontium ◽

Kinetics Of ◽

Oxygen Reduction Kinetics

Accelerating the oxygen reduction kinetics of solid oxide fuel cell (SOFC) cathodes is crucial to improve their efficiency and thus to provide the basis for an economically feasible application of...

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Performance of Manganese(III) Acetylacetonate in Solvent-Borne and High-Solid Alkyd Formulations

Materials ◽

10.3390/ma13030642 ◽

2020 ◽

Vol 13 (3) ◽

pp. 642

Author(s):

Eliška Matušková ◽

Jan Honzíček

Keyword(s):

Sampling Technique ◽

Total Reflection ◽

Attenuated Total Reflection ◽

In Situ Reduction ◽

High Solid ◽

Infrared And Raman Spectroscopy ◽

Colorimetric Measurements ◽

Paint Films ◽

Kinetics Of

This paper reports a strong drying activity of manganese(III) acetylacetonate. It is documented on several solvent-borne and high-solid alkyd binders. Solubility problems, which often appear upon application of new primary driers, were overcome by use of dimethyl sulfoxide. Interestingly, intense coloration of the drier does not influence the transparent paint films due to in situ reduction to manganese(II) as evidenced by colorimetric measurements. Kinetics of the autoxidation process was investigated by infrared and Raman spectroscopy. For selected formulation, the effect of film thickness on through drying was estimated by infrared spectroscopy using attenuated total reflection sampling technique.

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In situ study of electron beam-induced chemical vapor deposition of Au in an environmental TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100137653 ◽

1995 ◽

Vol 53 ◽

pp. 256-257

Author(s):

J. Drucker ◽

R. Sharma ◽

J. Kouvetakis ◽

K.H.J. Weiss

Keyword(s):

Electron Beam ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Quantum Effect ◽

Line Drawing ◽

Chemical Vapor ◽

Environmental Cell ◽

Engineering Changes ◽

Kinetics Of

Patterning of metals is a key element in the fabrication of integrated microelectronics. For circuit repair and engineering changes constructive lithography, writing techniques, based on electron, ion or photon beam-induced decomposition of precursor molecule and its deposition on top of a structure have gained wide acceptance Recently, scanning probe techniques have been used for line drawing and wire growth of W on a silicon substrate for quantum effect devices. The kinetics of electron beam induced W deposition from WF6 gas has been studied by adsorbing the gas on SiO2 surface and measuring the growth in a TEM for various exposure times. Our environmental cell allows us to control not only electron exposure time but also the gas pressure flow and the temperature. We have studied the growth kinetics of Au Chemical vapor deposition (CVD), in situ, at different temperatures with/without the electron beam on highly clean Si surfaces in an environmental cell fitted inside a TEM column.

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In situ observation of the martensitic transformation in (Mg,Y)-PSZ

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144036 ◽

1986 ◽

Vol 44 ◽

pp. 500-501

Author(s):

R-R. Lee

Keyword(s):

Martensitic Transformation ◽

High Strength ◽

Nucleation And Growth ◽

In Situ Observation ◽

Considerable Potential ◽

Transmission Electron ◽

Structural Applications ◽

Applied Stresses ◽

Kinetics Of

Partially-stabilized ZrO2 (PSZ) ceramics have considerable potential for advanced structural applications because of their high strength and toughness. These properties derive from small tetragonal ZrO2 (t-ZrO2) precipitates in a cubic (c) ZrO2 matrix, which transform martensitically to monoclinic (m) symmetry under applied stresses. The kinetics of the martensitic transformation is believed to be nucleation controlled and the nucleation is always stress induced. In situ observation of the martensitic transformation using transmission electron microscopy provides considerable information about the nucleation and growth aspects of the transformation.

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Growth kinetics of Al2Cu in an Al-1.5Cu thin film by in Situ TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100151696 ◽

1993 ◽

Vol 51 ◽

pp. 1172-1173

Author(s):

M. Park ◽

S.J. Krause ◽

S.R. Wilson

Keyword(s):

Thin Film ◽

In Situ Tem ◽

Collector Plate ◽

Transmission Electron ◽

Device Processing ◽

Corrosion Susceptibility ◽

Precipitation Phenomena ◽

Semiconductor Chips ◽

Kinetics Of

Cu alloying in Al interconnection lines on semiconductor chips improves their resistance to electromigration and hillock growth. Excess Cu in Al can result in the formation of Cu-rich Al2Cu (θ) precipitates. These precipitates can significantly increase corrosion susceptibility due to the galvanic action between the θ-phase and the adjacent Cu-depleted matrix. The size and distribution of the θ-phase are also closely related to the film susceptibility to electromigration voiding. Thus, an important issue is the precipitation phenomena which occur during thermal device processing steps. In bulk alloys, it was found that the θ precipitates can grow via the grain boundary “collector plate mechanism” at rates far greater than allowed by volume diffusion. In a thin film, however, one might expect that the growth rate of a θ precipitate might be altered by interfacial diffusion. In this work, we report on the growth (lengthening) kinetics of the θ-phase in Al-Cu thin films as examined by in-situ isothermal aging in transmission electron microscopy (TEM).

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In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

10.26434/chemrxiv.9876395.v1 ◽

2019 ◽

Author(s):

Hao Wu ◽

Jeffrey Ting ◽

Siqi Meng ◽

Matthew Tirrell

Keyword(s):

Small Angle ◽

Self Assembly ◽

Electrostatic Interactions ◽

Polyelectrolyte Complex ◽

Time Resolved ◽

X Ray ◽

X Ray Scattering ◽

Kinetics Of ◽

Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

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