Method for Producing Tetrapodal Nanoparticles with High Selectivity

Large-scale production of tetrapodal CdSe nanoparticles Advantages . Method produces tetrapodal CdSe nanoparticles of uniform size with high selectivity . Production costs (relative to existing methods) reduced approximately 200-fold . Method does not require use of highly toxic alkyl phosphonates The Technology The process of this invention allows for the production of CdSe tetrapods with 90% shape-selectivity using either a hot injection technique or a one-pot slow decomposition approach without the need for alkyl phosphonate ligands. Not only are such alkyl phosphonate ligands extremely expensive, but they are also highly toxic to humans. The technique also has the potential to be extended to the production of other non-spherical nanoparticle shapes and chemistries. Potential Applications . Photovoltaic CdSe and CdTe nanoparticles in the form of tetrapods have attracted considerable interest in the solar cell market, where tetrapodal nanoparticles have been demonstrated to provide significant advantages over current silicon-based technology. According to the U.S. Department of Energy, the domestic solar cell market increased nearly 40% in 2005, and the popularity of solar cells is expected to continue to rise in response to price volatility of petroleum-based fuels and increased availability of environmentally-friendly or �green� alternatives. . Medical imaging . Mechanical reinforcement of polymers Patent Status . A patent application has been filed with US Patent & Trademark Office.

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