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Results for “NUCLEATION”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Unstable and Metastable Mesophases Can Assist in the Nucleation of Porous Crystals
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Optically Triggered Nucleation Eliminates Hydration Hysteresis in Swelling Minerals
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Dust Effects on Nucleation Kinetics and Nanoparticle Product Size Distributions: Illustrative Case Study of a Prototype Ir(0) n Transition-Metal Nanoparticle Formation System
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Molecular Dynamics Simulations of the Effects of Entanglement on Polymer Crystal Nucleation
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Tuning Metastability of Poly(3-hexyl thiophene) Solutions to Enable in Situ Atomic Force Microscopy Imaging of Surface Nucleation
Poly(3-hexyl thiophene) (P3HT), a workhorse material for the study of organic electronic devices, assembles into nanofibers (NFs) upon crystallization from solution, providing the means to tailor morphology and improve device performance. We investigate how P3HT regioregularity, molecular weight, and concentration influence the hysteresis between crystallization and melting temperatures of NFs. Hysteresis is found to increase with molecular weight and reach an asymptote for polymer chains above the chain folding threshold (Mn > 12 kg/mol). Regioregularity does not substantially affect the hysteresis above a level of 88%, while increasing polymer concentration is found to reduce hysteresis. This insight facilitates in situ high-resolution atomic force microscopy measurements that provide better understanding of the mechanism of NF crystallization on graphite. We find an interchain distance (along the a crystallographic axis) of 16.7 ± 0.7 Å, and a spacing of 7.7 ± 0.2 Å along the c axis, suggesting that the crystals on graphite are form I.
Understanding the Effect of Nucleation in Amorphous Solid Dispersions through Time–Temperature Transformation
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Nucleation Kinetics and Structure Evolution of Quasi-Two-Dimensional ZnO at the Air?Water Interface:
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Quantifying the Nucleation and Growth Kinetics of Microwave Nanochemistry Enabled by in-situ High-Energy X-ray Scattering
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Controlling Morphology in Polycrystalline Films by Nucleation and Growth from Metastable Nanocrystals
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