Two different geometric methods for the three-dimensional reconstruction of electron microscope objects from a set of scanning electron micrographs are used to study the geometry of V-groove structures prepared by anisotropic etching of (100) silicon. The angles between the faces of the structures ...
where Z is the atomic number and the exponent x ranges from 1.5–2 depending on the collection geometry, probe aberrations and the Z of the studied elements12,27,28. In our experiments, we find that the ADF-STEM intensity for S and Mo scales as ~Z1.7which we validate with multislice ...
Ab initio molecular orbital calculations of the internal rotation of styrene with electron correlation using the polarized 6-31G* basis set The energies of styrene at various torsional angles have been calculated with full geometry optimization using the polarized 6-31G* basis set. The torsional ang...
The other geometry and material settings in VORPAL are the same as those in MEEP36. At the beginning, a total of 100 macro-particles (each macro-particle represents 10 real electrons) are uniformly distributed in a 4\;\mu m \times 4\;\mu m \times 2\;\mu m volume. In the ...
Bond lengths are in angstroms, angles are in degrees. Values in parentheses were obtained from microwave studies 〈78JA7436〉. The total energy of allene episulfide is −318 547.888 kcal mol−1 〈88RHA235〉. The geometry of thiiranimines obtained at the RHF/6-31G*-level is used as ...
Turbulent electric fields in combination with the shock geometry can create conditions for shock drift acceleration or diffusive shock acceleration [60, 101]. Shock acceleration is an important plasma-energisation mechanism throughout the Universe reaching from cluster shocks [17] to supernova remnants ...
Cross-correlation peaks were extracted from the tomograms with a threshold of 7 standard deviations above the mean, comprising 21886 initial particle coordinates. Particle angles were randomized to get rid of the missing wedge, which resulted from the restricted angular search range in the template ...
The insert shows photographs of the grating sample from two different angles. d The experimental and numerically fitted zero-order reflection curves (R0) at normal incidence. The geometry parameters are summarized as: P = 1000 nm, W = 620 nm, H = 70 nm and tM =...
We analyze the bonding in a number of networks of heavy main group elements comprised of finite-length linear chains fused at right angles. Isolated linear chain building blocks may be understood easily by analogy with three-orbital four-electron "hypervalent" bonding picture in such molecules as ...
Besides two preferred bond angles of 60° and 120° in Si wires, we find an additional metastable bond angle of 90° in S wires. The equilibrium geometry and electronic structure of these nanowires is shown to change drastically upon electron and hole doping. 展开 ...