Modelling multi-scale material growth and erosion under energetic atomic deposition

Stochastic Modelling of Soil Erosion and Deposition

The rate of erosion is the product of the concentration of active soil aggregates and their mean vertical velocity. The sediment concentration for a given time is proportional to the probability of detachment of first-time mobilized soil aggregates and to the probability of the deposited sediments’ redetachment. The probability of soil aggregate activation is equal to the probability of the dri...

Modelling Topographic Potential for Erosion and Deposition Using GIS

Modeling of erosion and deposition in complex terrain within a geographic information system (GIS) requires a high resolution digital elevation model (DEM), reliable estimation of topographic parameters, and formulation of erosion models adequate for digital representation of spatially distributed parameters. Regularized spline with tension was integrated within a GIS for computation of DEMs an...

Erosion and Deposition

Protection of polymer from atomic-oxygen erosion using Al2O3 atomic layer deposition coatings

Thin films of Al2O3 grown using atomic layer deposition (ALD) techniques can protect polymers from erosion by oxygen atoms. To quantify this protection, polyimide substrates with the same chemical repeat unit as Kapton were applied to quartz crystal microbalance (QCM) sensors. Al2O3 ALD films with varying thicknesses were grown on the polyimide substrates. The ALD-coated polyimide materials wer...

Surface growth in laser-focused atomic deposition

We present calculations of surface growth in laser-focused nanostructure fabrication. We show that theoretical predictions of the structure pro le's shape depend sensitively on the model used to describe the growth, and also on the parameters chosen within the model. This sensitivity illustrates that growth e ects can play a major role in laser-focused atomic deposition, and also suggests that ...