Characterizing the Three-Dimensional Structure of Block Copolymers via Sequential Infiltration Synthesis and Scanning Transmission Electron Tomography

ACS Nano ◽  
2015 ◽  
Vol 9 (5) ◽  
pp. 5333-5347 ◽  
Author(s):  
Tamar Segal-Peretz ◽  
Jonathan Winterstein ◽  
Manolis Doxastakis ◽  
Abelardo Ramírez-Hernández ◽  
Mahua Biswas ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Electron Tomography ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Three-dimensional real-space crystallography of MCM-48 mesoporous silica revealed by scanning transmission electron tomography

2006 ◽  
Vol 418 (4-6) ◽  
pp. 540-543 ◽  
Author(s):  
Timothy J.V. Yates ◽  
John Meurig Thomas ◽  
Jose-Jesus Fernandez ◽  
Osamu Terasaki ◽  
Ryong Ryoo ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Electron Tomography ◽  
Three Dimensional ◽  
Real Space ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

scholarly journals Three-Dimensional Imaging of Corrosion Mechanisms in Polymer Electrolyte Fuel Cells by Scanning Transmission Electron Tomography

2009 ◽  
Vol 15 (S2) ◽  
pp. 1418-1419 ◽  
Author(s):  
JK Hyun ◽  
ZY Liu ◽  
DA Muller
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Electron Tomography ◽  
Three Dimensional ◽  
Polymer Electrolyte Fuel Cells ◽  
Three Dimensional Imaging ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Corrosion Mechanisms

Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009

Three-Dimensional Structure Of C3D From Low Temperature Scanning Transmission Electron Microscopy and X-Ray Crystallography

2000 ◽  
Vol 6 (S2) ◽  
pp. 294-295
Author(s):  
D.J. Martin ◽  
F.P. Ottensmeyer
Keyword(s):  
Electron Microscopy ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
X Rays ◽  
Complement Protein ◽  
X Ray ◽  
X Ray Crystallography ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Macromolecular structure can be solved by x-ray crystallography to atomic resolution provided that the molecule can be crystallized, that the crystals diffract x-rays to high resolution, and that the phases of the diffracted x-rays can be determined. Though the resolution of single particle imaging by electron microscopy is lower than that of x-ray diffraction by crystals, electron microscopy can directly image a large molecular weight range of macromolecules in a non-crystalline environment, and provide the basis for the three-dimensional reconstruction of these structures. To investigate combining structural information from x-ray crystallography and electron microscopy for unknown structures, we have imaged a small protein of known structure (1), the 35 kDa human complement protein fragment C3d, in a scanning transmission electron microscope (STEM). The intention is to eventually combine the knowledge of electron densities and molecular boundaries from electron microscopy to assist in phase determination in x-ray crystallography.

Characterization of Crack-Tip Dislocations and their Effects on Materials Fracture

2010 ◽  
Vol 654-656 ◽  
pp. 2307-2311
Author(s):  
Kenji Higashida ◽  
Masaki Tanaka ◽  
Sunao Sadamatsu
Keyword(s):  
Single Crystals ◽  
Electron Tomography ◽  
Three Dimensional ◽  
Crack Tip ◽  
Local Stress ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Scanning Transmission ◽  
Crack Tips ◽  
P Type

Three-dimensional structure of crack tip dislocations were investigated by combining scanning transmission electron microscopy (STEM) and electron tomography (ET) in silicon single crystals. P-type (001) silicon single crystals were employed. <110> cracks were introduced from an indent on the (001) surface. The specimen was heated at 873K in order to introduce dislocations at the crack tips. The specimen was thinned to include the crack tip in the foil by an iron milling machine. STEM-ET observation revealed the three-dimensional structure of crack tip dislocations. Their Burgers vectors were determined by using an invisibility criterion. The local stress intensity factor was calculated using the dislocation characters obtained in the observation in this study, indicating that the dislocations observed were mode II shielding type dislocations.

Cryo-scanning transmission electron tomography of vitrified cells

2014 ◽  
Vol 11 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Sharon Grayer Wolf ◽  
Lothar Houben ◽  
Michael Elbaum
Keyword(s):  
Electron Tomography ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

Three-Dimensional Imaging of Shear Band Produced by ECAP Process in Al-Ag Alloy

2006 ◽  
Vol 503-504 ◽  
pp. 603-608
Author(s):  
Koji Inoke ◽  
Kenji Kaneko ◽  
Z. Horita
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Tomography ◽  
Shear Bands ◽  
Three Dimensional ◽  
Angular Pressing ◽  
Ecap Process ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
The Matrix

A significant change in microstructure occurs during the application of severe plastic deformation (SPD) such as by equal-channel angular pressing (ECAP). In this study, intense plastic strain was imposed on an Al-10.8wt%Ag alloy by the ECAP process. The amount of strain was controlled by the numbers of passes. After 1 pass of ECAP, shear bands became visible within the matrix. With increasing numbers of ECAP passes, the fraction of shear bands was increased. In this study, the change in microstructures was examined by three-dimensional electron tomography (3D-ET) in transmission electron microscopy (TEM) or scanning transmission electron microscopy (STEM). With this 3D-ET method, it was possible to conduct a precise analysis of the sizes, widths and distributions of the shear bands produced by the ECAP process. It is demonstrated that the 3D-ET method is promising to understand mechanisms of microstructural refinement using the ECAP process.

Three-dimensional structure of a polymer/clay nanocomposite characterized by transmission electron microtomography

2006 ◽  
Vol 13 (7) ◽  
pp. 589-603 ◽  
Author(s):  
Hideo Nishioka ◽  
Ken-Ichi Niihara ◽  
Takeshi Kaneko ◽  
Junpei Yamanaka ◽  
Takashi Inoue ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Polymer Clay Nanocomposite ◽  
Transmission Electron
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