| |
 | Nanotech 2002 Vol. 2
Technical Proceedings of the 2002 International Conference on Computational Nanoscience and Nanotechnology
Chapter 11: Mechanical Properties at the Nanoscale |
| | Size Effects and Scaling in Misfit Dislocation Formation in Self Assembled Quantum Dots | | Authors: | L.H. Friedman, D.M. Weygand and E. van der Giessen | | Affilation: | University of Groningen, The Netherlands | | Pages: | 271 - 274 | | Keywords: | dislocations, modelling, stress-concentration, quantum dots, self-assembly | | Abstract: | Growth islands due to large mismatch strain arising in Stranski-Krastanow (SK) and Volmer-Weber (VW) lm growth can be used to produce large arrays of quantum dots. This same mismatch strain may also cause mis t dislocations to form, presenting a quality control problem.Johnson and Freund (J. Appl.Ph ys.81 (9), 1997, p6081) developed a two-dimensional model of mis- t dislocation nucleation in SK and VW growth islands whereby they predict a power-law relation between mis- t strain, em, and the minimum island size to nucleate a mis t dislocation, Rc: Rc, where l < 1 is a function of the island-substrate contact angle. This problem is treated here in three dimensions as an application of a numerical dislocation simulation using the nite element method to take proper boundary conditions into account. The predictions are analyzed in the context of the Johnson–Freund model, and modi cation of the power-law is shown to be necessary. |  | View paper | | ISBN: | 0-9708275-6-3 |
| Pages: | 504 |
| Hardcopy: | $100.00 |
| Special: | 3 CD Set — 15% off with Free Shipping |
| Up | |
|
| nanoPRwire™ |
 |
| News Headlines |
 |
|
|
| |
| |
|
| | |
| |
|
|
