Letter abstract
Nature Materials 2, 155 - 158 (2003)
Published online: 9 February 2003 | doi:10.1038/nmat830
There is a Corrigendum (January 2004) associated with this Letter.
Subject Categories: Semiconductors | Nanoscale materials | Design synthesis and processing
Synthesis and size-dependent properties of zinc-blende semiconductor quantum rods
Shihai Kan1, Taleb Mokari1, Eli Rothenberg1 & Uri Banin1
Dimensionality and size are two factors that govern the properties of semiconductor nanostructures1, 2. In nanocrystals, dimensionality is manifested by the control of shape, which presents a key challenge for synthesis3, 4, 5. So far, the growth of rod-shaped nanocrystals using a surfactant-controlled growth mode, has been limited to semiconductors with wurtzite crystal structures, such as CdSe (ref. 3). Here, we report on a general method for the growth of soluble nanorods applied to semiconductors with the zinc-blende cubic lattice structure. InAs quantum rods with controlled lengths and diameters were synthesized using the solution–liquid–solid mechanism6 with gold nanocrystals as catalysts7. This provides an unexpected link between two successful strategies for growing high-quality nanomaterials, the vapour–liquid–solid approach for growing nanowires8, 9, 10, 11, 12, and the colloidal approach for synthesizing soluble nanocrystals13, 14, 15. The rods exhibit both length- and shape-dependent optical properties, manifested in a red-shift of the bandgap with increased length, and in the observation of polarized emission covering the near-infrared spectral range relevant for telecommunications devices16, 17.
- Institute of Chemistry, Farkas Center for Light Induced Processes and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Correspondence to: Uri Banin1 e-mail: banin@chem.ch.huji.ac.il
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