title: Deterministic shape-selective synthesis of nanowires, nanoribbons and nanosaws by steady-state vapour-transport.
abstract: We demonstrate the deterministic shape-selective synthesis and growth of CdSe nanowires, nanosaws and nanoribbons by a simple vapour-transport process in a tube furnace. The key step, in order to achieve reproducible shape selectivity for a given set of deposition parameters, is to exclude any effects of the temperature ramping. We prove that an efficient precursor-flow shutter is achieved just by varying the total furnace pressure. We then present a shape-diagram linking the different nanocrystals morphologies to only two parameters: powder and substrate temperature. These are varied in the 550-700 °C and 400-600 °C range, respectively. A model explaining the shape control is discussed.
authors: Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK.
authors: A
authors: A
authors: Colli
authors: A
authors: A
authors: Fasoli
authors: S
authors: S
authors: Hofmann
authors: C
authors: C
authors: Ducati
authors: J
authors: J
authors: Robertson
authors: A C
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authors: Ferrari