scholarly journals Branch-Point Motion in Architecturally Complex Polymers: Estimation of Hopping Parameters from Computer Simulations and Experiments

2014 ◽  
Vol 47 (10) ◽  
pp. 3362-3377 ◽  
Author(s):  
Petra Bačová ◽  
Helen Lentzakis ◽  
Daniel J. Read ◽  
Angel J. Moreno ◽  
Dimitris Vlassopoulos ◽  
...  
Keyword(s):  
Computer Simulations ◽  
Branch Point ◽  
Point Motion ◽  
Complex Polymers

scholarly journals Real-Space Analysis of Branch Point Motion in Architecturally Complex Polymers

2014 ◽  
Vol 47 (19) ◽  
pp. 6955-6963 ◽  
Author(s):  
Petra Bačová ◽  
Angel J. Moreno
Keyword(s):  
Branch Point ◽  
Real Space ◽  
Space Analysis ◽  
Point Motion ◽  
Complex Polymers

Branch-Point Motion in Asymmetric Star Polymers

2005 ◽  
Vol 38 (10) ◽  
pp. 4484-4494 ◽  
Author(s):  
Jung Hun Lee ◽  
Lewis J. Fetters ◽  
Lynden A. Archer
Keyword(s):  
Branch Point ◽  
Star Polymers ◽  
Point Motion

A Slip-Link Model of Branch-Point Motion in Entangled Polymers

2004 ◽  
Vol 37 (21) ◽  
pp. 8160-8166 ◽  
Author(s):  
S. Shanbhag ◽  
R. G. Larson
Keyword(s):  
Branch Point ◽  
Entangled Polymers ◽  
Point Motion ◽  
Link Model

Molecular Observation of Branch Point Motion in Star Polymer Melts

2010 ◽  
Vol 43 (1) ◽  
pp. 518-524 ◽  
Author(s):  
Michaela Zamponi ◽  
Wim Pyckhout-Hintzen ◽  
Andreas Wischnewski ◽  
Michael Monkenbusch ◽  
Lutz Willner ◽  
...  
Keyword(s):  
Branch Point ◽  
Polymer Melts ◽  
Star Polymer ◽  
Point Motion

scholarly journals The Role of the Functionality in the Branch Point Motion in Symmetric Star Polymers: A Combined Study by Simulations and Neutron Spin Echo Spectroscopy

2017 ◽  
Vol 51 (1) ◽  
pp. 242-253 ◽  
Author(s):  
Stefan Holler ◽  
Angel J. Moreno ◽  
Michaela Zamponi ◽  
Petra Bačová ◽  
Lutz Willner ◽  
...  
Keyword(s):  
Branch Point ◽  
Spin Echo ◽  
Star Polymers ◽  
Neutron Spin ◽  
Neutron Spin Echo ◽  
Point Motion ◽  
Symmetric Star

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

Multislice calculations for quasi-periodic and non-periodic objects

1990 ◽  
Vol 48 (4) ◽  
pp. 138-139
Author(s):  
R. Herrera ◽  
A. Gómez
Keyword(s):  
Electron Diffraction ◽  
Computer Simulations ◽  
Periodic Table ◽  
Amorphous Materials ◽  
Space Group ◽  
Essential Step ◽  
Shape Effects ◽  
Atomic Scattering ◽  
Diffraction Patterns ◽  
Periodic Continuation

Computer simulations of electron diffraction patterns and images are an essential step in the process of structure and/or defect elucidation. So far most programs are designed to deal specifically with crystals, requiring frequently the space group as imput parameter. In such programs the deviations from perfect periodicity are dealt with by means of “periodic continuation”.However, for many applications involving amorphous materials, quasiperiodic materials or simply crystals with defects (including finite shape effects) it is convenient to have an algorithm capable of handling non-periodicity. Our program “HeGo” is an implementation of the well known multislice equations in which no periodicity assumption is made whatsoever. The salient features of our implementation are: 1) We made Gaussian fits to the atomic scattering factors for electrons covering the whole periodic table and the ranges [0-2]Å−1 and [2-6]Å−1.

Computer simulations for the TEM bend contour technique

1996 ◽  
Vol 54 ◽  
pp. 134-135
Author(s):  
Vladimir Yu. Kolosov ◽  
Anders R. Thölén
Keyword(s):  
Computer Simulations ◽  
Real Space ◽  
Advantages And Disadvantages ◽  
Short Overview ◽  
Diffraction Contrast ◽  
Beam Method ◽  
Convergent Beam ◽  
Contour Technique

In this paper we give a short overview of two TEM applications utilizing the extinction bend contour technique (BC) giving the advantages and disadvantages; especially we consider two areas in which the BC technique remains unique. Special attention is given to an approach including computer simulations of TEM micrographs.BC patterns are often observed in TEM studies but are rarely exploited in a serious way. However, this type of diffraction contrast was one of the first to be used for analysis of imperfections in crystalline foils, but since then only some groups have utilized the BC technique. The most extensive studies were performed by Steeds, Eades and colleagues. They were the first to demonstrate the unique possibilities of the BC method and named it real space crystallography, which developed later into the somewhat similar but more powerful convergent beam method. Maybe, due to the difficulties in analysis, BCs have seldom been used in TEM, and then mainly to visualize different imperfections and transformations.

Assessing "Dissimilarity From the Group": Evidence From Computer Simulations

2005 ◽  
Author(s):  
Natalie J. Allen ◽  
David Stanley ◽  
Helen Williams ◽  
Sarah J. Irwin
Keyword(s):  
Computer Simulations
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