Oleylamine Assisted Synthesis of Ultralong Copper Nanowires

Abstract

Abstract. This paper reports the hydrothermal synthesis of smooth and ultralong copper nanowires (Cu NW) prepared using oleylamine (OM), oleic acid (OA), and Cl -ion as coordinating and etching agents respectively. Cu nanowires with mean diameters around 82.3 nm and lengths exceeding 300 µm were synthesized using 2 % vol. OM and 1.8 mM OA at 120ºC after 12 h. The Cu NWs exhibit five-fold twinning and growth along the [110] direction. The morphological evolution of the products were also observed and discussed. Without Cl -, octahedral crystals instead of nanowires were formed. The addition of oleic acid as coordinating agent resulted to fewer particles and smoother nanowires which exhibit excellent mechanical stability. This method provides a simple, low-cost and high yield synthesis of Cu NWs for applications such as gas sensors and transparent conducting electrodes.

Oleic acid/oleylamine ligand pair: a versatile combination in the synthesis of colloidal nanoparticles

“…The addition of OAc as a coordinating agent resulted in fewer particles and smoother nanowires, which displayed excellent mechanical stability. 313…”

Electrochemical Investigation of the Growth of Copper Nanowires in the Presence of Ethylenediamine through Mixed Potential

“…This suggests that EDA acts as a structure directing agent, which is responsible for the formation of nanowires in the solution. [1][2][3][4][5][6][7][8][9][10][11][12][13] As such, anisotropic growth is observed. However, adding any amount of EDA does not ensure complete nanowire formation as seen in Fig.…”

“…1f. [11][12][13] The corresponding XRD patterns of Cu nanowires synthesized using 0-211 mM EDA are shown in Fig. 2 2 were not present in the XRD patterns, indicating the high purity of the as-prepared Cu nanowires.…”

“…Other studies have even utilized two surfactants at the same time to further increase length of the Cu nanowires and improve their surface quality. 3,4,11,14 For example, the diameter of Cu nanowires synthesized with EDA was decreased by about 55% when a small amount of cetyltrimethyl ammonium bromide (CTAB) was added into the solution.14 Additionally, the surface roughness of the Cu nanowires was significantly reduced.14 However, most of these studies on Cu nanowires prepared in aqueous media are still focused on the optimization of solution parameters for morphological control.In our previous works, we have applied simple electrochemical measurements, such as in situ monitoring of mixed potential, to understand the growth of cobalt (Co) nanoparticles and nanowires, 15,16 nickel (Ni) nanoparticles and nanowires, 17,18 and Cu nanoparticles [19][20][21] during electroless deposition in water and ethylene glycol solutions. More recently, we have utilized mixed potential measurements, in combination with thermodynamic calculations, to elucidate the ef- * Electrochemical Society Member.…”

“…[1][2][3][4][5][6][7][8][9][10][11] While organic syntheses have produced quality nanowires, they are relatively more expensive than those performed in aqueous media due to high cost of reagents and higher energy requirement to initiate the chemical reaction. [4][5][7][8][9][10][11] The synthesis of Cu nanowires at low temperatures (0-80…”