Results 21 to 30 of about 882,221 (292)

LOCAL DISTORTIONS AND VOLUME CHANGES IN SEMICONDUCTORS - DONORS IN SILICON [PDF]

open access: yes, 2002
Experiments giving impurity-induced lattice distortion can measure quite distinct quantities. In particular EXAFS (extended X-ray fine structure) measures nearest-neighbour distances, whereas both volume changes and recent spectroscopic data measure long-
PAJOT, B, SCHOBER, HR, STONEHAM, AM
core   +1 more source

The Concept of a Critical Density of Energy in Models of Fracture of Solids

open access: yesУспехи физики металлов, 2001
New energy conception of both solid’s fracture based on criteria of critical density of elastic energy, pс, in fracture nuclei and three scale levels of the process, viz.
Yu. Ya. Meshkov
doaj   +1 more source

Atomic resolved material displacement on graphite surfaces by scanning tunnelling microscopy [PDF]

open access: yes, 1992
Atomic scale modifications and subsequent atomic resolution imaging has been achieved on the highly oriented pyrolytic graphite surface in air. Application of short pulse voltages, above a minimum threshold voltage of 3.5 V, across the tunneling gap ...
Akari S.   +4 more
core   +1 more source

Relevance of structural defects to the mechanism of mechanical deformation in metallic glasses

open access: yesScientific Reports, 2023
It is known that deformation in disordered materials such as metallic glasses and supercooled liquids occurs via the cooperative rearrangement of atoms or constituent particles at dynamical heterogeneities, commonly regarded as point-like defects.
Charles K. C. Lieou, Takeshi Egami
doaj   +1 more source

Atomic force microscopy analysis of cell volume regulation [PDF]

open access: yesPhysical Review E, 2008
Cells swell in response a hypoosmotic challenge. By converting osmotic pressure to hydrostatic pressure at the cell membrane via van't Hoff's law, and converting that to tension via Laplace's law one predicts that the cell membrane should stretch and become stiff. We tested this prediction using the atomic force microscopy.
Chiara, Spagnoli   +3 more
openaire   +2 more sources

Sintering as a process of transport of activated volume [PDF]

open access: yesScience of Sintering, 2002
Starting with the fact that sintering is the consequence of the process of transport of activated volume, it has been shown how the kinetics of the sintering process can be defined.
Nikolić Nataša S.   +3 more
doaj   +1 more source

Atomic scale volume and grain boundary diffusion elucidated by in situ STEM

open access: yesNature Communications, 2023
Diffusion is one of the most important phenomena studied in science ranging from physics to biology and, in abstract form, even in social sciences. In the field of materials science, diffusion in crystalline solids is of particular interest as it plays a
Peter Schweizer   +6 more
doaj   +1 more source

Phase formation and mechanical properties of Al1.2CoxCrFeNi high entropy alloys

open access: yesCailiao gongcheng, 2023
To obtain Al-Co-Cr-Fe-Ni high entropy alloys (HEAs) with high strength and high ductility, Al1.2CoxCrFeNi(x=1, 1.6, 2.2, 2.8) HEAs were successfully prepared by arc melting method and its microstructure and mechanical properties were systematically ...
ZHAO Senlin, CHEN Xizhang
doaj   +1 more source

MGOS: A library for molecular geometry and its operating system [PDF]

open access: yes, 2019
The geometry of atomic arrangement underpins the structural understanding of molecules in many fields. However, no general framework of mathematical/computational theory for the geometry of atomic arrangement exists.
Bhak, Jong   +10 more
core   +2 more sources

On fast charged particles scattering in a thin crystalline undulator

open access: yesPhysics Letters B, 2019
The scattering of fast charged particles in a thin silicon crystalline undulator is considered under conditions when all the particles of the beam undergo above-barrier motion with respect to the bent crystalline atomic planes. The consideration is based
N.F. Shul'ga, V.I. Truten'
doaj   +1 more source

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