Strain Driven Self Assembly
Modeling thermodynamics and kinetics at the nanoscale
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An appealing approach to manufacturing future generation nanoscale devices envisioned for electronic, magnetic and photonic applications is to exploit the natural tendency of small material clusters to self-organize into well-defined patterns. While strain- driven self-assembly is widely viewed as a promising technique for patterning at the nanoscale, to follow this approach and create structures in a desired manner, a reliable means to engineer the characteristic size and shapes that the clusters adopt during self- assembly is essential. Motivated by a significant potential technological impa...
An appealing approach to manufacturing future generation nanoscale devices envisioned for electronic, magnetic and photonic applications is to exploit the natural tendency of small material clusters to self-organize into well-defined patterns. While strain- driven self-assembly is widely viewed as a promising technique for patterning at the nanoscale, to follow this approach and create structures in a desired manner, a reliable means to engineer the characteristic size and shapes that the clusters adopt during self- assembly is essential. Motivated by a significant potential technological impact, a systematic elucidation of how long-range elastic interactions couple with surface and bulk thermodynamics and kinetics to control shape, size and compositional patterns assumes a paramount importance. The work presented here describes a detailed analysis of evolution of morphological and compositional patterns in various strain-driven self-assembled systems. The examples include alloy quantum dots and 2D patterns such as surface stress domains and epitaxial nanowires.
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