Nano-Brass: Bimetallic Copper/Zinc Colloids by a Nonaqueous Organometallic Route Using [Cu(OCH(Me)CH2NMe2)2] and Et2Zn as Precursors

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• 作者：Julia Hambrock ; Marie K. Schrö ; ter ; Alexander Birkner ; Christoph Wö ; ll ; and Roland A. Fischer
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：November 4, 2003
• 年：2003
• 卷：15
• 期：22
• 页码：4217 - 4222
• 全文大小：182K
• 年卷期：v.15,no.22(November 4, 2003)
• ISSN：1520-5002

文摘

We present a synthetic approach toward alloyed Cu/Zn nanoparticles using [Cu(OCH(Me)CH₂NMe₂)₂] and Et₂Zn as precursors. The thermolysis in the hot coordinating solventhexadecylamine, HDA, leads to the formation of nanoscale, colloidal Cu/Zn systems withzinc contents (by EDX) of 5, 30, and 65%, respectively. All systems have been analyzed usingUV/Vis spectroscopy, transmission electron microscopy, EDX, and selected area electrondiffraction (SAED). These analytical data suggest that alloying between zinc and coppertakes place, revealing crystalline phases of CuZn and CuZn₂ besides Cu as components ofthe particles in the case of higher zinc concentrations. The characteristic surface plasmonresonance (UV) for pure HDA-capped copper colloids at 558 nm, still observed for copper-rich alloy particles, disappears for zinc-rich particles.