Small-punch and TEM-disc testing techniques and their application to characterization of radiation damage

1992 ◽  
Vol 27 (4) ◽  
pp. 983-989 ◽  
Author(s):  
J. Kameda ◽  
X. Mao
Keyword(s):  
Radiation Damage ◽  
Small Punch ◽  
Testing Techniques

Cryomicroscopy of multiphase latices

1991 ◽  
Vol 49 ◽  
pp. 1060-1061
Author(s):  
O. L. Shaffer ◽  
M.S. El-Aasser ◽  
C. L. Zhao ◽  
M. A. Winnik ◽  
R. R. Shivers
Keyword(s):  
Electron Microscopy ◽  
Radiation Damage ◽  
Freeze Fracture ◽  
Particle Morphology ◽  
Second Stage ◽  
Transmission Electron ◽  
Important Approach ◽  
Carbon Coated ◽  
Preparation Techniques

Transmission electron microscopy is an important approach to the characterization of the morphology of multiphase latices. Various sample preparation techniques have been applied to multiphase latices such as OsO4, RuO4 and CsOH stains to distinguish the polymer phases or domains. Radiation damage by an electron beam of latices imbedded in ice has also been used as a technique to study particle morphology. Further studies have been developed in the use of freeze-fracture and the effect of differential radiation damage at liquid nitrogen temperatures of the latex particles embedded in ice and not embedded.Two different series of two-stage latices were prepared with (1) a poly(methyl methacrylate) (PMMA) seed and poly(styrene) (PS) second stage; (2) a PS seed and PMMA second stage. Both series have varying amounts of second-stage monomer which was added to the seed latex semicontinuously. A drop of diluted latex was placed on a 200-mesh Formvar-carbon coated copper grid.

Characterization of defects in tabular silver halide grains

1990 ◽  
Vol 48 (4) ◽  
pp. 1046-1047
Author(s):  
C. Goessens ◽  
D. Schryvers ◽  
J. Van Landuyt ◽  
A. Verbeeck ◽  
R. De Keyzer
Keyword(s):  
Radiation Damage ◽  
Silver Halide ◽  
Chemical Characteristics ◽  
X Ray ◽  
Free Region ◽  
Central Defect ◽  
Crystallographic Defects ◽  
Physical And Chemical ◽  
Two Sides

Silver halide grains (AgX, X=Cl,Br,I) are commonly recognized as important entities in photographic applications. Depending on the preparation specifications one can grow cubic, octahedral, tabular a.o. morphologies, each with its own physical and chemical characteristics. In the present study crystallographic defects introduced by the mixing of 5-20% iodide in a growing AgBr tabular grain are investigated. X-ray diffractometry reveals the existence of a homogeneous Ag(Br1-xIx) region, expected to be formed around the AgBr kernel. In fig. 1 a two-beam BF image, taken at T≈100 K to diminish radiation damage, of a triangular tabular grain is presented, clearly showing defect contrast fringes along four of the six directions; the remaining two sides show similar contrast under relevant diffraction conditions. The width of the central defect free region corresponds with the pure AgBr kernel grown before the mixing with I. The thickness of a given grain lies between 0.15 and 0.3 μm: as indicated in fig. 2 triangular (resp. hexagonal) grains exhibit an uneven (resp. even) number of twin interfaces (i.e., between + and - twin variants) parallel with the (111) surfaces. The thickness of the grains and the existence of the twin variants was confirmed from CTEM images of perpendicular cuts.

Submicrometer characterization of surfaces of epoxy-based organic–inorganic nanocomposite coatings. A comparison of AFM study with currently used testing techniques

2006 ◽  
Vol 102 (6) ◽  
pp. 5763-5774 ◽  
Author(s):  
Milena Špírková ◽  
Miroslav Šlouf ◽  
Olga Bláhová ◽  
Tereza Farkačová ◽  
Jaroslava Benešová
Keyword(s):  
Nanocomposite Coatings ◽  
Testing Techniques

Ion beam-induced luminescence as method of characterization of radiation damage in polycrystalline materials

2015 ◽  
Vol 365 ◽  
pp. 273-277 ◽  
Author(s):  
Iwona Jozwik ◽  
Jacek Jagielski ◽  
Grzegorz Gawlik ◽  
Gerard Panczer ◽  
Nathalie Moncoffre ◽  
...  
Keyword(s):  
Radiation Damage ◽  
Ion Beam ◽  
Polycrystalline Materials

Characterization of Radiation Damage in Carbon Nanotube Field-Effect Transistors

2013 ◽  
Vol 60 (6) ◽  
pp. 4087-4093 ◽  
Author(s):  
S. Ashley Francis ◽  
Cory D. Cress ◽  
John W. McClory ◽  
Elizabeth A. Moore ◽  
James C. Petrosky
Keyword(s):  
Carbon Nanotube ◽  
Radiation Damage ◽  
Field Effect ◽  
Field Effect Transistors

Limiting radiation damage for high-brilliance biological solution scattering: practical experience at the EMBL P12 beamline PETRAIII

2015 ◽  
Vol 22 (2) ◽  
pp. 273-279 ◽  
Author(s):  
Cy M. Jeffries ◽  
Melissa A. Graewert ◽  
Dmitri I. Svergun ◽  
Clément E. Blanchet
Keyword(s):  
Radiation Damage ◽  
Practical Experience ◽  
Quality Data ◽  
Biological Macromolecules ◽  
Sample Handling ◽  
X Ray ◽  
X Ray Scattering ◽  
Sample Position ◽  
Effects Of Radiation

Radiation damage is the general curse of structural biologists who use synchrotron small-angle X-ray scattering (SAXS) to investigate biological macromolecules in solution. The EMBL-P12 biological SAXS beamline located at the PETRAIII storage ring (DESY, Hamburg, Germany) caters to an extensive user community who integrate SAXS into their diverse structural biology programs. The high brilliance of the beamline [5.1 × 1012 photons s−1, 10 keV, 500 (H) µm × 250 (V) µm beam size at the sample position], combined with automated sample handling and data acquisition protocols, enable the high-throughput structural characterization of macromolecules in solution. However, considering the often-significant resources users invest to prepare samples, it is crucial that simple and effective protocols are in place to limit the effects of radiation damage once it has been detected. Here various practical approaches are evaluated that users can implement to limit radiation damage at the P12 beamline to maximize the chances of collecting quality data from radiation sensitive samples.

Characterization of Radiation Damage at the Nb Site in Natural Pyrochlores and Samarskites by X-Ray Absorption Spectroscopy

1988 ◽  
Vol 127 ◽  
Author(s):  
R. B. Greegor ◽  
F. W. Lytle ◽  
B. C. Chakoumakos ◽  
G. R. Lumpkin ◽  
J. K. Warner ◽  
...  
Keyword(s):  
Radiation Damage ◽  
Long Range ◽  
Absorption Spectroscopy ◽  
Alpha Decay ◽  
Long Range Order ◽  
Static Disorder ◽  
Annealed Condition ◽  
X Ray ◽  
X Ray Absorption

ABSTRACTX-ray absorption spectroscopy has been used to investigate the Nb B-site in pyrochlores (A1.2B2O6Y0–1, Fd3m, Z=8) and samarskites (A3B5O16) in both metamict and annealed condition. The XANES and EXAFS measurements indicate significant changes in pyrochlore and smaller changes in samarskite as a result of radiation damage. In the metamict state the Nb site in both pyrochlores and samarskites is similar to Nb in Nb2O5. Short Nb-O (1.65Å) bonds are not disrupted by alpha-decay/recoil-nuclei events as much as longer bonds (2.00Å). This increases the asymmetry and static disorder at the local Nb site while long range order is greatly diminished resulting in considerable distribution in Nb-M distances and bond angles.

Luminescence characterization of radiation damage of α-Al2O3 under 1 MeV/amu ion irradiation

1996 ◽  
Vol 233-237 ◽  
pp. 1321-1324 ◽  
Author(s):  
V.A. Skuratov ◽  
V.A. Altynov ◽  
S.M. Abu AlAzm
Keyword(s):  
Radiation Damage ◽  
Ion Irradiation ◽  
Α Al2o3
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