Berlin 2005 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 50: Nanodr
ähte

HL 50.3: Vortrag

Dienstag, 8. März 2005, 11:15–11:30, TU P-N201

Catalyst–Nanostructure Interaction in Growth of ZnO and ZnS 1–D Nanostructures — •Christine Borchers, Sven Müller, Daniel Stichtenoth, and Carsten Ronning — II. Physikalisches Institut, Universität Göttingen, 37077 Göttingen

Vapor-liquid-solid is a well established process in catalyst guided growth of 1–D nanostructures, i.e. nanobelts and nanowires. The catalyst particle is generally believed to be in the liquid state during growth, and it is the site for adsorbing incoming molecules. The crystalline structure of the catalyst may not have any influence on the structure of the grown nanostructures. In this presentation, using Au guided growth of ZnO and ZnS nanostructures, we show that the interfaces between the catalyst droplet and the nanostructure grow in well defined mutual crystallographic relationships. The catalyst droplet directs the nanostructure’s growth direction and defines its diameter. Possible alloy, intermetallic, or eutectic phase formation during catalysis are elucidated.