Polar surface effects on the thermal conductivity of ZnO nanowires: a shell-like surface reconstruction-induced preserving mechanism

On the Role of Amides and Imides for Understanding GaN Syntheses from Ammonia Solution: Molecular Mechanics Models of Ammonia, Amide and Imide Interactions with Gallium Nitride

A key requisite to characterizing GaN precipitation from ammonia solution from molecular simulations is the availability of reliable molecular mechanics models for the interactions of gallium ions with NH3 , NH2- , and NH2- species, respectively. Here, we present a tailor-made force field which is fully compatible to an earlier developed GaN model, thus bridging the analyses of Ga3+ ions in ammonia solution with the aggregation of [Gax (NH)y (NH2 )z ]+3x-2y-z precursors and the modelling of GaN crystals. For this, quantum mechanical characterization of a series of Ga-coordination clusters is used for parameterization and benchmarking the generalized amber force field (GAFF2) and tailor-made refinements needed to achieve good agreement of both structural features and formation energy, respectively. The perspectives of our models for larger scale molecular dynamics simulations are demonstrated by the analyses of amide and imide defects arrangement during the growth of GaN crystal faces.

Measuring methods for thermoelectric properties of one-dimensional nanostructural materials

Measuring methods for the Seebeck coefficient and thermal conductivity of 1D nanostructural materials have been reviewed and structures, principles, merits and shortcomings, as well as examples of each method are discussed in detail.

EG-Assisted hand-in-hand growth of prism-like Cu2O nanorods with high aspect ratios and their thermal conductive performance

EG acts as a “bridge” that controls the “hand-in-hand” growth and transforms the Cu₂O wires into prism-like nanorods.