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

Abstract

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 solvent hexadecylamine, HDA, leads to the formation of nanoscale, colloidal Cu/Zn systems with zinc contents (by EDX) of 5, 30, and 65%, respectively. All systems have been analyzed using UV/Vis spectroscopy, transmission electron microscopy, EDX, and selected area electron diffraction (SAED). These analytical data suggest that alloying between zinc and copper takes place, revealing crystalline phases of CuZn and CuZn2 besides Cu as components of the particles in the case of higher zinc concentrations. The characteristic surface plasmon resonance (UV) for pure HDA-capped copper colloids at 558 nm, still observed for copper-rich alloy particles, disappears for zinc-rich particles.

Kinetics and Coverage Dependent Reaction Mechanisms of the Copper Atomic Layer Deposition from Copper Dimethylamino-2-propoxide and Diethylzinc

“…The reaction of Cu(dmap) 2 and Et 2 Zn was previously used to synthesize Cu/Zn alloy nanocolloids using thermolysis. 22 Vidjayacoumar et al investigated ALD reactions of eight different copper (II) complexes separately with AlMe 3 , BEt 3 and Et 2 Zn in order to identify the most promising combination of the copper precursor and co-reagent. 20,23 The reductive properties of various metallocenes along with different copper precursors were investigated with density functional theory (DFT) and solution phase chemistry to evaluate the use of metallocene compounds as reducing agents for Cu ALD.…”

Media effects on nanobrass arc fabrications

“…Changing the composition of these nanoalloys can drastically impact their properties (such as magnetic strength, conductivity, and surface chemistry), so careful attention must be paid to the synthetic methods and control of morphology. In recent years, many methods have been developed for the preparation of nanoalloy materials including: Metal evaporation, grinding of bulk metal, sputtering, organometallic precursor decomposition [18,19], ball milling (BM) [20], solution phase metal salt reduction [21,22], crystallization of noncrystallinestate [23], pulsed electro deposition [24,25], laser vaporization controlled condensation (LVCC) [26], sonochemical method [27,28], mechanical synthesis [29], template synthesis [30], ␥-ray irradiation [31], metal carbonyl pyrolysis [32], sandblast-annealing [33], laser ablation [34], and co-hydrogenolysis [35]. In particular, colloids of nanobrass alloys (␣/␤-CuZn) as well as colloidal solutions of nanocopper are obtained by co-hydrogenolysis of [CpCu(PMe 3 )] and [ZnCp * 2 ] in the presence of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) [35].…”

A Straightforward Route to Copper/Zinc Oxide Nanocomposites: The Controlled Thermolysis of Zn[Cu(CN)3]

“…[10] Pollard et al [4] 2 ] as precursors for copperzinc mixed oxides. Recently, a nonaqueous organometallic route was developed by Hambrock et al [11] and uniform copper-zinc nanoparticles were obtained. They used Cu-[OCH(Me)CH 2 NMe 2 ] and Et 2 Zn as precursors.…”