html5-img
1 / 2

Formation of quantum dots on a nano-ribbon

Pattern formation induced during strained growth Kenneth R. Elder, Oakland University, DMR 0906676.

sivan
Download Presentation

Formation of quantum dots on a nano-ribbon

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Pattern formation induced during strained growth Kenneth R. Elder, Oakland University, DMR 0906676 When a material solidifies on the surface of another material with similar crystalline structure, the solidifying material will often attempt to grow coherently with the substrate. Small difference in the structures can however lead to strain induced patterns that may be detrimental or beneficial depending on the technological application. The PI and collaborators have recently developed computational efficient methods for studying a wide variety of such phenomena. The three figures on the left are simulations of GeSi quantum dot formation on Si nano-ribbons, a processes that has the potential of generating a spatial modulated band gap that would have many applications in the electronic device industry. The three figures on the right show a simulation of the ordering of a thin films of copper on a ruthenium substrate. Such bimetallic surfaces are commonly used to enhance chemical reactions rates which are strongly influenced by the specific spatial patterns the copper layers form. Patterning of Cu layers on Ru(0001) substrate Formation of quantum dots on a nano-ribbon (side view) (top view) time = t1 GeSi one mono-layer Si t2 > t1 Si two mono-layers t3 > t2 Si four mono-layers

  2. Pattern formation induced during strained growth Kenneth R. Elder, Oakland University, DMR 0906676 The research conducted under this award has had a broad impact in many areas including, • International collaborations and visits, • Aalto U., Espoo, Finland, Aug. / Feb. 2010 • Heinrich-Heine U. of Düsseldorf, Germany, Aug. 2010 • McMaster U., Hamilton, Canada, July 2010 • Hong-Kong Polytechnical U. Hong Kong, June 2010. • Institute of Materials Physics in Space, German Aerospace Center (DLR), Cologne Germany, Sept 2009 • Invited lectures at international conferences • 2010 International Symposium on Multi-scale Modeling and Simulation of Materials, Shengyang China, July 2010. • PTM 2010, Solid-Solid Phase Transformations in Inorganic Materials, Avignon France, June 2010. • CECAM Conference on Classical Density Functional Theory in Soft and Hard Matter, Lausanne, Switzerland, Oct 2009. • Bridging the Gap Workship, McMaster U, Hamilton, Canada, Oct 2009. • 2nd Symposium on Phase-Field Modeling in Materials Science, Aachen Germany, Aug. 2009. Collaborators on award #0906676 Top row: Z-F Huang (Wayne State U), N Provatas, J.J. Hoyt (McMaster U, Canada), E. Granato (INPE,Brazil); Middle row: T Ala-Nisillä, G. Rossi, C. Achim, A. Jaatinen (Aalto U., Finland): Bottom row: S. Mkhonta (U. Swaziland, Swaziland), K. Thornton (U. Michigan), S-C Ying (Brown), M. Grant (McGill, Canada) Missing: D-H Yeon (U. of Michigan), J.A.P. Ramos (INPI, Brazil), D. Dobbins, M. Nazrulla (Oakland U). Publications in refereed journals 2010: three articles in the Physical Review E, one article in the Physical Review B, two articles in the Philosophical Magazine, one in the Journal of Condensed Matter Physics, and one in the European Journal of Physics E.

More Related