Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"oriented attachment"”.
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Annular Flow Synthesis and Assembly of Two-Dimensional Materials
… double hydroxides (LDH) may crystallize via oriented attachment, which is accelerated by hydrodynamic flow. These observations are used to formulate a mechanism that explains the non-monotonic variation in particle characteristics using characteristic kinetic timescales. I then demonstrated …
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Synthesis of organically capped and water soluble metal sulfide semiconductor nanoparticles
… HDA capped PbS is mostly likely due an oriented attachment mechanism. The formation of the rod shaped TOPO capped PbS is due to the impurities in TOPO. The X-ray diffraction and high resolution electron microscopy studies show that the particles are crystalline.
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Quantum dot-based nanomaterials for biological imaging
… single-crystalline cobalt nanorods through the oriented attachment of spherical cobalt nanocrystal monomers.
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Hierarchical Assembly Strategy and Multiscale Structural Origin of Exceptional Mechanical Performance In Nacre
… why the aragonite nanoparticles choose highly-oriented attachment as its crystallization pathway is rationalized in terms of thermodynamics. The aragonite nanoparticle order-disorder transformation can be triggered by high temperature and mechanical deformation, which in turn confirms that the …
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Nanoparticle Superlattice Processing: Monodispersed Building-Blocks & Single Crystal Films
… assemblies into monodisperse crystallites and oriented crystal films, using density gradient centrifugation and scratch-directed assembly, respectively. Density gradient centrifugation allows for the separation of NCT assemblies, comprising various-sized crystallites, into discrete monodisperse …
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Diffuse Damage Repair Mechanism in Bone
… arrangement of primary nanoparticles into an iso-oriented crystal via oriented attachment. Non-classical crystallization pathway is always particle facilitated and in consistent with mesoscopic transformation process, where oriented attachment of smaller building blocks is required to achieve a …
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Formation and transformation kinetics of iron oxy-hydroxides and effects of adsorbed oxyanions
… was formed from Fh dissolution and then grew by oriented attachment. In contrast, Hm formed after the aggregation of Fh particles. We propose that NO3- outer-sphere complexes hydrate the surface and promote the Gt formation through a dissolution/crystallization pathway, while PO43- inner-sphere …
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Growth, phase transformation, and self-assembly in iron oxide and uranium oxide nanostructures
Nanomaterials have great scientific appeal due to their unique properties and prevalence in the environment, but the fundamental mechanisms that drive nanoparticle growth, phase transformation, and assembly into larger structures are still shrouded in mystery. Considerable progress has been made in …
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In situ electron microscopy of nanomaterials dynamics in heterogeneous phase environments
… gas environments, the particle coalescence via oriented attachment took place. These results showed that the combination of imaging modes can provide information to explain the catalyst degradation during operation. This thesis demonstrates that in situ TEM coupled with an understanding of the …