Istituto dei materiali per l'elettronica ed il magnetismo     
Calestani D., Zha M., Mosca R., Lazzarini L., Salviati G., Zappettini A., Zanotti L. The challenge for large-scale vapor-phase growths of not-catalyzed ZnO nanostructures: purity vs. yield. In: Materials Research Society Symposia Proceedings, vol. 1174 article n. 1174-V05-02. Materials Research Society, 2009.
Large-scale growth capability is a general requirement for any reliable and cost-effective device application. Catalyst-free vapor-phase growth techniques generally let obtain high purity materials, but their application in large-scale growths of zinc oxide (ZnO) nanostructures is not trivial, because the lack of catalysts makes the control of these process rather difficult. Three different optimizations of the basic vapor phase growth have been studied and performed to obtain selected and reproducible growths of three different ZnO nanostructures with improved yield, i.e. nanotetrapods, nanowires and nanorods. No precursor or catalyst has been used in order to reduce contamination sources as more as possible.
URL: http://www.mrs.org/s_mrs/sec.asp?CID=1646&DID=8855&SID=1
Subject nanostructures
vapor phase growth
81.10.Bk Growth from vapor
81.07.Bc Nanocrystalline materials
81.05.Hd Other semiconductors
68.37.Hk Scanning electron microscopy (SEM)

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