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Seminars»23.02.2017 - Arshad Saleem Bhatti : Self-assembly growth of nanostructures: Buffer layer assisted growth vapor liquid solid growth

23.02.2017 - Arshad Saleem Bhatti : Self-assembly growth of nanostructures: Buffer layer assisted growth vapor liquid solid growth

Self-assembly growth of nanostructures: Buffer layer assisted growth vapor liquid solid growth

Arshad Saleem Bhatti
Center for Micro and Nano Devices, Department of Physics, COMSATS Institute of Information Technology, Islamabad, PAKISTAN
23 February 2017, Thursday, 14:40
Cavid Erginsoy Seminar Room, Physics Department, 3rd floor

Abstract: The process of self-assembly for the growth of nanostructure is nature inspired. The growth of nanostructures in a self-organized manner depends strongly on the interactions at the atomistic level. The growth of nanostructures or thin films is driven by the energy lowering mechanism at the substrate’s surface and diffusion process of adatoms. In this talk, two growth techniques namely, buffer layer assisted growth (BLAG) and vapor liquid solid (VLS) will be discussed with examples. It will be demonstrated that BLAG can be employed to synthesize nanostructures of any material on any substrate of choice. The role of buffer layer in the formation of nanostructures will be discussed in detail. In the second technique, VLS will be discussed to synthesize wide band gap semiconductor nanowires. It will be demonstrated that VLS can be employed to self-dope catalysts during the growth of nanowires and the concentration of doped catalysts depend on the growth conditions.

Reminder: Tea and cookies will be in the seminar room before the seminar.