Synthesis of Monodisperse Cadmium Phosphide Nanoparticles Using ex-Situ Produced Phosphine

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• 作者：Shiding Miao ; Stephen G. Hickey ; Christian Waurisch ; Vladimir Lesnyak ; Tobias Otto ; Bernd Rellinghaus ; Alexander Eychm眉ller
• 刊名：ACS Nano
• 出版年：2012
• 出版时间：August 28, 2012
• 年：2012
• 卷：6
• 期：8
• 页码：7059-7065
• 全文大小：413K
• 年卷期：v.6,no.8(August 28, 2012)
• ISSN：1936-086X

文摘

The synthesis of nanoparticles using a gas鈥搇iquid interfacial reaction, which for the first time is shown to result in highly monodisperse materials across a range of sizes, is presented. We demonstrate, using cadmium phosphide as the paradigm that this synthesis method can provide colloidal nanocrystals or quantum dots monodisperse enough so that for the first time multiple transitions in their absorbance spectra can be observed. Clear evidence is given that the resulting cadmium material is Cd₆P₇ and not Cd₃P₂, and a thorough investigation into the role of temperature and growth time and their effects on the optical properties has been conducted. This strategy can be extended to synthesize other relevant members of the binary component pnictide semiconducting family, and the chemistry of the pnictide compound formation using this synthetic methodology has been explained using the redox potential of the metals. The suitability of the resulting cadmium phosphide quantum dots for applications in light-emitting diodes (LEDs) has further been demonstrated.

Keywords:

g/action/doSearch?action=search&searchText=gas%E2%88%92liquid+interface+reaction&qsSearchArea=searchText">gas鈭抣iquid interface reaction; g/action/doSearch?action=search&searchText=cadmium+phosphide&qsSearchArea=searchText">cadmium phosphide; g/action/doSearch?action=search&searchText=quantum+dot+synthesis&qsSearchArea=searchText">quantum dot synthesis; g/action/doSearch?action=search&searchText=light%5C-emitting+diode&qsSearchArea=searchText">light-emitting diode