Towards controlled production of specific carbon nanostructures— a theoretical study on structural transformations of graphitic and diamond particles

2001 ◽  
Vol 79 (1) ◽  
pp. 63-65 ◽  
Author(s):  
Helmut Hermann ◽  
Florin Fugaciu ◽  
Gotthard Seifert
Keyword(s):  
Carbon Nanostructures ◽  
Theoretical Study ◽  
Structural Transformations ◽  
Diamond Particles

Experimental and Theoretical Study of Dynamic Structural Transformations between Sensing Copper(II)-Uracil Antiferromagnetic and Metamagnetic Coordination Compounds

2020 ◽  
Vol 20 (8) ◽  
pp. 5097-5107
Author(s):  
Noelia Maldonado ◽  
Josefina Perles ◽  
José Ignacio Martínez ◽  
Carlos J. Gómez-García ◽  
María-Luisa Marcos ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Theoretical Study ◽  
Structural Transformations

Physical Analysis of Structural Transformation in Ge-Incorporated a-SbxSe100-x System

2011 ◽  
Vol 316-317 ◽  
pp. 45-53 ◽  
Author(s):  
Sunanda Sharda ◽  
Neha Sharma ◽  
Pankaj Sharma ◽  
Vineet Sharma
Keyword(s):  
Structural Transformation ◽  
Chalcogenide Glasses ◽  
Theoretical Study ◽  
Far Infrared ◽  
Structural Transformations ◽  
Physical Parameters ◽  
Physical Analysis ◽  
Melt Quenching ◽  
Structural Environment ◽  
Rigidity Percolation

Chalcogenide glasses are suitable for far-infrared and imaging applications. In the present study, Sb10Se90-xGex (x=0, 19, 21, 23, 25, 27) system has been chosen to study structural transformations via physical parameters. Bulk samples with x = 0, 19, 21, 23, 25 and 27 have been prepared using the melt-quenching technique. A theoretical study of the ternary glass system revealed that there was a significant change in the structural environment of the system due to rigidity percolation, which took place as Se was replaced by Ge, and hence resulted in changes in other physical parameters of the system.

Oxidative cyclodehydrogenation reaction for the design of extended 2D and 3D carbon nanostructures: A theoretical study

2005 ◽  
Vol 314 (1-3) ◽  
pp. 85-99 ◽  
Author(s):  
Marco Di Stefano ◽  
Fabrizia Negri ◽  
Paola Carbone ◽  
Klaus Müllen
Keyword(s):  
Carbon Nanostructures ◽  
Theoretical Study ◽  
2D And 3D

Theoretical study of amino derivatives and anticancer platinum drug grafted on various carbon nanostructures

2013 ◽  
Vol 139 (17) ◽  
pp. 174704 ◽  
Author(s):  
S. Kraszewski ◽  
E. Duverger ◽  
C. Ramseyer ◽  
F. Picaud
Keyword(s):  
Carbon Nanostructures ◽  
Theoretical Study ◽  
Platinum Drug ◽  
Amino Derivatives

Theoretical Study on Amino Acid-Based Ionic Pairs and Their Interaction with Carbon Nanostructures

2014 ◽  
Vol 118 (18) ◽  
pp. 9741-9757 ◽  
Author(s):  
Cesar Herrera ◽  
Rafael Alcalde ◽  
Mert Atilhan ◽  
Santiago Aparicio
Keyword(s):  
Amino Acid ◽  
Carbon Nanostructures ◽  
Theoretical Study

Structural Transformation of a Germanium Σ=13 (510) [001] Tilt Grain Boundary under the Electron Beam

1990 ◽  
Vol 48 (1) ◽  
pp. 52-53 ◽  
Author(s):  
Jean-Luc Rouvière ◽  
Alain Bourret
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Grain Boundary ◽  
Structural Transformation ◽  
Mirror Symmetry ◽  
High Resolution Electron Microscopy ◽  
Structural Transformations ◽  
Covalent Bonds ◽  
Resolution Electron ◽  
Tilt Grain Boundary

The possible structural transformations during the sample preparations and the sample observations are important issues in electron microscopy. Several publications of High Resolution Electron Microscopy (HREM) have reported that structural transformations and evaporation of the thin parts of a specimen could happen in the microscope. Diffusion and preferential etchings could also occur during the sample preparation.Here we report a structural transformation of a germanium Σ=13 (510) [001] tilt grain boundary that occurred in a medium-voltage electron microscopy (JEOL 400KV).Among the different (001) tilt grain boundaries whose atomic structures were entirely determined by High Resolution Electron Microscopy (Σ = 5(310), Σ = 13 (320), Σ = 13 (510), Σ = 65 (1130), Σ = 25 (710) and Σ = 41 (910), the Σ = 13 (510) interface is the most interesting. It exhibits two kinds of structures. One of them, the M-structure, has tetracoordinated covalent bonds and is periodic (fig. 1). The other, the U-structure, is also tetracoordinated but is not strictly periodic (fig. 2). It is composed of a periodically repeated constant part that separates variable cores where some atoms can have several stable positions. The M-structure has a mirror glide symmetry. At Scherzer defocus, its HREM images have characteristic groups of three big white dots that are distributed on alternatively facing right and left arcs (fig. 1). The (001) projection of the U-structure has an apparent mirror symmetry, the portions of good coincidence zones (“perfect crystal structure”) regularly separate the variable cores regions (fig. 2).

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