Formation dynamics of mesocrystals composed of organically modified CeO2 nanoparticles: analogy to a particle formation model

Mesocrystals, non-classical crystalline nanostructured materials composed of aligned nanoparticles, present analogous behavior to ordinary particle formation.

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Modelling Soot Formation: Model of Particle Formation

Cleaner Combustion - Green Energy and Technology ◽

10.1007/978-1-4471-5307-8_15 ◽

2013 ◽

pp. 389-407 ◽

Cited By ~ 4

Author(s):

Edward K. Y. Yapp ◽

Markus Kraft

Keyword(s):

Soot Formation ◽

Particle Formation ◽

Formation Model

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Prediction of collective opinion in consensus formation

International Journal of Modern Physics C ◽

10.1142/s0129183114500028 ◽

2014 ◽

Vol 25 (04) ◽

pp. 1450002 ◽

Cited By ~ 6

Author(s):

Lei Hou ◽

Jianguo Liu ◽

Xue Pan ◽

Wen-Jun Song ◽

Xu-Dong Li

Keyword(s):

Steady State ◽

Theoretical Analysis ◽

Linear Relationship ◽

Correlation Coefficient ◽

Opinion Leaders ◽

Formation Model ◽

Opinion Formation ◽

Consensus Formation ◽

Final State ◽

Formation Dynamics

In the consensus formation dynamics, the effect of leaders and interventions have been widely studied for it has many applications such as in politics and commerce. However, the problem is how to know if it is necessary for one to make an intervention. In this paper, we theoretically propose a method for predicting the tendency and final state of collective opinion. By giving each agent a conviction ci which measures the ability to insist on his opinion, we present an opinion formation model in which agents with high convictions naturally show up properties of the opinion leaders. Results reveal that, although each agent initially gets an opinion evenly distributed in the range [-1, 1], the collective opinion of the steady-state may deviate to the positive or negative direction because of the initial bias of the leaders' opinions. We further get the correlation coefficient of the linear relationship between the collective opinion and the initial bias according to both the experimental and theoretical analysis. Thus, we could predict the final state at the very beginning of the dynamic only if we get the opinions of a small portion of the population. The prediction would afford us more time and opportunities to make reactions and interventions.

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Nanoparticle Precipitation in Reverse Microemulsions: Particle Formation Dynamics and Tailoring of Particle Size Distributions

Langmuir ◽

10.1021/la703566v ◽

2008 ◽

Vol 24 (8) ◽

pp. 4320-4328 ◽

Cited By ~ 30

Author(s):

Björn Niemann ◽

Peter Veit ◽

Kai Sundmacher

Keyword(s):

Particle Size ◽

Particle Formation ◽

Size Distributions ◽

Particle Size Distributions ◽

Reverse Microemulsions ◽

Formation Dynamics

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A three-dimensional numerical study on exhaust gas emissions from a medium-duty diesel engine using a phenomenological soot particle formation model combined with detailed chemistry

International Journal of Engine Research ◽

10.1243/14680874jer00908 ◽

2008 ◽

Vol 9 (4) ◽

pp. 283-296 ◽

Cited By ~ 19

Author(s):

T Kaminaga ◽

J Kusaka ◽

Y Ishii

Keyword(s):

Diesel Engine ◽

Soot Particle ◽

Numerical Study ◽

Three Dimensional ◽

Particle Formation ◽

Exhaust Gas ◽

Formation Model ◽

Gas Emissions ◽

Detailed Chemistry ◽

Exhaust Gas Emissions

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High-resolution electron microscopy of nanostructured materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100137239 ◽

1995 ◽

Vol 53 ◽

pp. 172-173

Author(s):

M. José-Yacamán

Keyword(s):

Electron Microscopy ◽

High Resolution ◽

Grain Boundaries ◽

Nanostructured Materials ◽

High Resolution Electron Microscopy ◽

Hrem Image ◽

Small Particles ◽

Resolution Electron ◽

Nanophase Materials

Electron microscopy is a fundamental tool in materials characterization. In the case of nanostructured materials we are looking for features with a size in the nanometer range. Therefore often the conventional TEM techniques are not enough for characterization of nanophases. High Resolution Electron Microscopy (HREM), is a key technique in order to characterize those materials with a resolution of ~ 1.7A. High resolution studies of metallic nanostructured materials has been also reported in the literature. It is concluded that boundaries in nanophase materials are similar in structure to the regular grain boundaries. That work therefore did not confirm the early hipothesis on the field that grain boundaries in nanostructured materials have a special behavior. We will show in this paper that by a combination of HREM image processing, and image calculations, it is possible to prove that small particles and coalesced grains have a significant surface roughness, as well as large internal strain.

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Microstructural characterization of sol-gel coating on PET films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100172164 ◽

1994 ◽

Vol 52 ◽

pp. 886-887

Author(s):

R. T. Chen ◽

R.A. Norwood

Keyword(s):

Ion Beam ◽

Sol Gel ◽

Industrial Applications ◽

Hard Coatings ◽

Nanometer Scale ◽

Ion Beam Sputtering ◽

Process Technology ◽

Refractive Index Measurement ◽

Organically Modified ◽

Pet Films

Sol-gel processing has been used to control the structure of a material on a nanometer scale in preparing advanced ceramics and glasses. Film coating using the sol-gel process was also found to be a viable process technology in applications such as optical, porous, antireflection and hard coatings. In this study, organically modified silicate (Ormosil) coatings are applied to PET films for various industrial applications. Sol-gel materials are known to exhibit nanometer scale structures which havepreviously been characterized by small-angle X-ray scattering (SAXS), neutron scattering and light scattering. Imaging of the ultrafine sol-gel structures has also been performed using an ultrahigh resolution replica/TEM technique. The objective of this study was to evaluate the ultrafine structures inthe sol gel coatings using a direct imaging technique: atomic force microscopy (AFM). In addition, correlation of microstructures with processing parameters, coating density and other physical properties will be discussed.The materials evaluated are organically modified silicate coatings on PET film substrates. Refractive index measurement by the prism coupling method was used to assess density of the sol-gel coating.AFM imaging was performed on a Nanoscope III AFM (by Digital Instruments) using constant force mode. Solgel coating samples coated with a thin layer of Ft (by ion beam sputtering) were also examined by STM in order to confirm the structures observed in the contact type AFM. In addition, to compare the previous results, sol-gel powder samples were also prepared by ultrasonication followed by Pt/Au shadowing and examined using a JEOL 100CX TEM.

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