Differences Between Charge Trapping States in Irradiated Nano-Crystalline HfO$_{2}$ and Non-Crystalline Hf Silicates

Theoretical modeling of charge trapping in crystalline and amorphous Al2O3.

The characteristics of intrinsic electron and hole trapping in crystalline and amorphous Al2O3 have been studied using density functional theory (DFT). Special attention was paid to enforcing the piece-wise linearity of the total energy with respect to electron number through the use of a range separated, hybrid functional PBE0-TC-LRC (Guidon et al 2009 J. Chem. Theory Comput. 5 3010) in order ...

United States Patent: Nano-Crystalline, Homo-Metallic, Protective Coatings

Photophoresis as a Source of Crystalline Silicates in Comets

Introduction: Crystalline silicates have been detected in a growing number of comets [1] [2] [3]. Since these bodies are presumed to be formed in the cold outer part of the solar nebula, several processes have been invoked in order to explain the origin of their crystalline silicates. It has been suggested that shock waves in the outer solar nebula could anneal the amorphous silicates to crysta...

Crystalline silicates in Planetary Nebulae with [ WC ] central stars ⋆

Wepresent ISO-SWS spectroscopy of the cool dusty envelopes surrounding two Planetary Nebulae with [WC] central stars, BD+30 3639 and He 2-113. The λ < 15 μm region is dominated by a rising continuumwith prominent emission from C-rich dust (PAHs), while the long wavelength part shows narrow solid state features from crystalline silicates. This demonstrates that the chemical composition of both s...

Atomic Transport in Nano-crystalline Thin Films

Ge and B diffusion was studied in nano-crystalline Si, and Pd and Si self-diffusion was studied in nano-crystalline Pd2Si during and after Pd/Si reactive diffusion. These experiments showed that grain boundary (GB) diffusion kinetic is the same in microand nano-GBs, whereas triple junction (TJ) diffusion is several orders of magnitude faster than GB diffusion. In addition, GB segregation and GB...