Synthesis of Size-Controlled and Shaped Copper Nanoparticles

Abstract

The synthesis of stable, monodisperse, shaped copper nanoparticles has been difficult, partially because of copper's propensity for oxidation. This article reports the findings of an investigation of a synthetic route for the synthesis of size-controllable and potentially shape-controllable molecularly capped copper nanoparticles. The approach involved the manipulation of reaction temperature for the synthesis of copper nanoparticles in organic solvents in the presence of amine and acid capping agents. By manipulating the reaction temperature, this route has been demonstrated for the production of copper nanoparticles ranging from 5 to 25 nm. The size dependence of the melting temperature of copper nanoparticles, especially for surface melting, is believed to play an important role in interparticle coalescence, leading to size growth as the reaction temperature is increased. Control of the reaction temperature and capping molecules has also been demonstrated to produce copper nanoparticles with different shapes such as rods and cubes. The previously proposed combination of the selective formation of a seed precursor and a selective growth direction due to the preferential adsorption of capping agents on certain nanocrystal facets is believed to be responsible for shape formation by kinetically controlling the growth rates of crystal facets. The nanoparticles are characterized using TEM, XRD, and UV-visible techniques. A mechanistic consideration of the size control and shape formation is also discussed.

Optimization Properties and Characterization of Green Synthesis of Copper Oxide Nanoparticles Using Aqueous Extract of Cordia myxa L. Leaves

“…The SPR variation may be attributed to influence between smaller nanoparticles which leads to particles growth [22]. The accurate position of the SPR band could differ depending on the size, shape and capping agent, among other individuals properties of the nanoparticles [23,24]. The maximum absorption was observed at 1:3 ratio, but by increasing the ratio to 1:4 and 1:5 v/v, the absorption decreased.…”

Copper nanoparticle incorporated plasmonic organic bulk-heterojunction solar cells

“…On the other hand, LSPRs were also observed with Cu NPs in the visible wavelength region, although they were weaker than those induced by Au and Ag NPs. [16][17][18] Thus, Cu NPs are especially suited for use in organic solar cells, since Cu is much cheaper than precious metals such as Au and Ag. Therefore, the study of plasmonic effects due to Cu NPs in organic solar cells is important for finding a cost-effective solution for enhancing PCE for commercial production.…”

“…1(b)), similar to previous studies. [16][17][18] We investigated the morphology of the PEDOT:PSS layers to determine how Cu NPs were incorporated. The atomic force microscopy (AFM) measurements showed no clear difference between the PEDOT:PSS layers with and without Cu NPs (see Figs.…”

Corrosion‐Protected Hybrid Nanoparticles

“…[[qv: 20a,24]] However, other metallic materials (including Cu,25 Al,26 and Mg27) are often overlooked, despite favorable optical properties, due to their inherent instability in air and water. In particular, Cu is highly conductive, and could represent a cost‐effective replacement for Au in plasmonic, photovoltaic, and catalytic applications,28 but its use is limited as it oxidizes quickly.…”