scholarly journals Structural relaxation and self-diffusion in covalent amorphous solids: Silicon nitride as a model system

2007 ◽  
Vol 102 (4) ◽  
pp. 043516 ◽  
Author(s):  
H. Schmidt ◽  
W. Gruber ◽  
T. Gutberlet ◽  
M. Ay ◽  
J. Stahn ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Structural Relaxation ◽  
Amorphous Solids ◽  
Model System ◽  
Self Diffusion

Diffusion in Isotope Heterostructures Investigated by Neutron Reflectometry

2009 ◽  
Vol 289-292 ◽  
pp. 697-703 ◽  
Author(s):  
Erwin Hüger ◽  
Jochen Stahn ◽  
Udo Geckle ◽  
Michael Bruns ◽  
Harald Schmidt
Keyword(s):  
Thin Films ◽  
Silicon Nitride ◽  
Amorphous Silicon ◽  
Model System ◽  
Neutron Reflectometry ◽  
Diffusion In Solids ◽  
Amorphous Silicon Nitride ◽  
Self Diffusion

Studies of self-diffusion in solids are presented, which are based on neutron reflectometry. For the application of this technique the samples under investigation are prepared in form of isotope heterostructures. These are nanometer sized thin films, which are chemically completely homogenous, but isotope modulated. Using this method, diffusion lengths in the order of 1 nm and below can be detected which allows to determine ultra low diffusivities in the order of 10-25 m2/s. For the model system amorphous silicon nitride we demonstrate how the structure of the isotope hetrostructures (triple layers or multilayers) influences the efficiency of diffusivity determination.

Relevance of hydrogen bonded associates on the transport properties and nanoscale dynamics of liquid and supercooled 2-propanol

2021 ◽  
Author(s):  
Yanqin Zhai ◽  
Peng Luo ◽  
Michihiro Nagao ◽  
Kenji Nakajima ◽  
Tatsuya Kikuchi ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Transport Properties ◽  
Structural Relaxation ◽  
Model System ◽  
Mesoscale Structures ◽  
Nanoscale Dynamics ◽  
Hydrogen Bonded

2-propanol was investigated, in both the liquid and supercooled states, as a model system to study how hydrogen bonds affect the structural relaxation and the dynamics of mesoscale structures, of...

Nitrogen self‐diffusion in silicon nitride

1976 ◽  
Vol 65 (7) ◽  
pp. 2668-2671 ◽  
Author(s):  
Kazunori Kijima ◽  
Shin‐ichi Shirasaki
Keyword(s):  
Silicon Nitride ◽  
Self Diffusion

Self-diffusion of silicon-30 and nitrogen-15 in α phase silicon nitride

1988 ◽  
Vol 105-106 ◽  
pp. 47-54 ◽  
Author(s):  
Kirsten P. Kunz ◽  
Vinod K. Sarin ◽  
Robert F. Davis ◽  
Scott R. Bryan
Keyword(s):  
Silicon Nitride ◽  
Self Diffusion ◽  
Α Phase

Generalized Activation Energy Spectrum Theory: A New Approach for modeling Structural Relaxation in Amorphous Solids

1993 ◽  
Vol 321 ◽  
Author(s):  
Jung H. Shin ◽  
Harry A. Atwater
Keyword(s):  
Experimental Data ◽  
Activation Energy ◽  
Structural Relaxation ◽  
Ad Hoc ◽  
Amorphous Solids ◽  
Nucleation Kinetics ◽  
Crystal Silicon ◽  
Time Resolved ◽  
New Approach ◽  
Kinetics Of

ABSTRACTA general approach to the dynamics of structural relaxation in amorphous solids is developed. A form of the recombination kinetics of defects is chosen which removes the ad hoc assumption made in previous theories that defects recombine only with others of identical activation energy. The generalized theory is tested quantitatively by modelling the structural relaxation of amorphous silicon, and comparing the results with the experimental data on structural relaxation. It is found that the generalized theory is necessary in order to accurately describe the time-resolved relaxation data. The generalized theory is also applied to estimate the effect of irradiation on the nucleation kinetics of crystal silicon, and is found to agree well with experimental data.

Self-Diffusion in a Nonuniform Model System

1986 ◽  
Vol 57 (20) ◽  
pp. 2481-2484 ◽  
Author(s):  
Detlef Dürr ◽  
Sheldon Goldstein ◽  
Joel L. Lebowitz
Keyword(s):  
Model System ◽  
Self Diffusion
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