Effect of Precursor Particle Size on the Densification and Crystallization Behavior of Mullite

Stable emulsions of individual n-alkane (n-nonadecane) in water with different average particle size were prepared without surfactants. The phase transition temperatures for n-nonadecane were determined by the dynamic light scattering method. The effect of the n-alkane particle size on the melting and crystallization temperatures was studied. The crystallization temperature significantly decreases for particles smaller than a certain characteristic value.

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Exploring the zone of anisotropy and broken symmetries in DNA-mediated nanoparticle crystallization

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1611808113 ◽

2016 ◽

Vol 113 (38) ◽

pp. 10485-10490 ◽

Cited By ~ 38

Author(s):

Matthew N. O’Brien ◽

Martin Girard ◽

Hai-Xin Lin ◽

Jaime A. Millan ◽

Monica Olvera de la Cruz ◽

...

Keyword(s):

Molecular Dynamics ◽

Particle Size ◽

Phase Transitions ◽

Phase Space ◽

Symmetry Breaking ◽

Crystallization Behavior ◽

Particle Surface ◽

Rich Phase ◽

Broken Symmetries ◽

Dynamics Simulations

In this work, we present a joint experimental and molecular dynamics simulations effort to understand and map the crystallization behavior of polyhedral nanoparticles assembled via the interaction of DNA surface ligands. In these systems, we systematically investigated the interplay between the effects of particle core (via the particle symmetry and particle size) and ligands (via the ligand length) on crystallization behavior. This investigation revealed rich phase diagrams, previously unobserved phase transitions in polyhedral crystallization behavior, and an unexpected symmetry breaking in the ligand distribution on a particle surface. To understand these results, we introduce the concept of a zone of anisotropy, or the portion of the phase space where the anisotropy of the particle is preserved in the crystallization behavior. Through comparison of the zone of anisotropy for each particle we develop a foundational roadmap to guide future investigations.

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Polypropylene/Layered Double Hydroxide (LDH) Nanocomposites: Influence of LDH Particle Size on the Crystallization Behavior of Polypropylene

ACS Applied Materials & Interfaces ◽

10.1021/am5075826 ◽

2015 ◽

Vol 7 (23) ◽

pp. 12399-12410 ◽

Cited By ~ 58

Author(s):

Baku Nagendra ◽

Kiran Mohan ◽

E. Bhoje Gowd

Keyword(s):

Particle Size ◽

Layered Double Hydroxide ◽

Crystallization Behavior ◽

Double Hydroxide

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Preparation and Characterization of Water Based and Double Enveloped Nano-Fe3O4 Magnetic Fluids

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.1044 ◽

2010 ◽

Vol 152-153 ◽

pp. 1044-1048

Author(s):

Lai Qiang Li ◽

Shu Lin Wang ◽

Jie Liu ◽

Sheng Juan Li ◽

Jun Jing Zhang

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Magnetic Fluid ◽

Crystallization Behavior ◽

Chemical Precipitation ◽

Precipitation Method ◽

Fe3o4 Magnetic Nanoparticles ◽

Water Based ◽

Water Base

The nanoparticles of Fe3O4 were prepared with chemical precipitation method, and then used sodium oleate and the lauryl sulfonic aid sodium as bilayer to envelope the ultra-fine Fe3O4 particles. Then stabilized water base magnetic fluid was obtained. The crystallization behavior and the surface of Fe3O4 nanoparticles after the modification were investigated with XRD and IR respectively; the particle size was studied with TEM; the magnetic properties were studied with VSM. The mechanism of bilayer surfactants that modified Fe3O4 magnetic nanoparticles was explained, and influencing factors of the magnetic fluid were discussed.

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