Published in Mechanics of Solids
Abstract—For an elastic isotropic incompressible material of general form, a number of exact solutions have been found about large torsional and tensile–compressive deformations of a solid circular cylinder, taking into account distributed dislocations. Explicit formulas are obtained that determine the effect of dislocations on the dependences of t...
Plastic flow in body-centered cubic (bcc) alloys is governed by the thermally-activated motion of screw dislocations in close-packed planes. In bcc interstitial solid solutions, solute diffusion can occur at very fast rates owing to low migration energies and solute concentrations. Under mechanical loading, solutes may move on the same or similar t...
Published in Journal of Electronic Materials
In high-volume manufacturing of SiC power devices like Schottky barrier diodes and MOSFETs, especially with the high demands of high reliability applications like the automotive market, the issue of reliability needs to be tackled from multiple angles. It becomes important to isolate and eliminate failure mechanisms at the source rather than just r...
Published in Journal of phycology
Coccolithophores belong to the most abundant calcium carbonate mineralizing organisms. Coccolithophore biomineralization is a complex and highly regulated process, resulting in a product that strongly differs in its intricate morphology from the abiogenically produced mineral equivalent. Moreover, unlike extracellularly formed biological carbonate ...
Published in Interface focus
Frustration is a powerful mechanism in condensed matter systems, driving both order and complexity. In smectics, the frustration between macroscopic chirality and equally spaced layers generates textures characterized by a proliferation of defects. In this article, we study several different ground states of the chiral Landau-de Gennes free energy ...
Published in Advanced materials (Deerfield Beach, Fla.)
Engineered atomic dislocations have been used to create a novel, Sb2 Te3 nanoplate-like architecture that exhibits a unique antisymmetric chirality. High-resolution transmission electron microscopy (HRTEM) coupled with atomic force microscopy and X-ray photoelectron spectroscopy reveals the architectures to be extremely well ordered with little res...
Published in Chirality
Here we review our three recently developed analytical models describing the intraband optical activity of semiconductor nanocrystals, which is induced by screw dislocations, ionic impurities, or irregularities of the nanocrystal surface. The models predict that semiconductor nanocrystals can exhibit strong optical activity upon intraband transitio...
Published in Science China Technological Sciences
A correlation study between the observed surface morphology using high-resolution scanning electron microscopy (HRSEM) and the observed structural imperfections using transmission electron microscopy (TEM) has been conducted for a-plane GaN. There are three different sized asymmetric surface pits: large pit of 500 nm–2 µm in side length, medium pit...
Published in Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
The key ideas presented in the classic paper 'The growth of crystals and the equilibrium structure of their surfaces' by W. K. Burton, N. Cabrera and F. C. Frank, published in Philosophical Transactions A in 1951, are summarized and put in the context of both the state of knowledge at the time of publication and the considerable amount of work sinc...
