Electrodeposition of copper nanopowder with controllable morphology: influence of pH on the nucleation/growth mechanism

Luo, Zhongbao; Su, Yuchang; Yue, S.X.; Yu, Qiushan; Zhang, Hongzhi; Zhang, Jing

doi:10.1007/s10008-021-04913-1

Cited by 10 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Decreasing the pH of the solution from 7 to 2 did not improve the shell’s homogeneity, yielding fewer larger Cu crystals at pH 4 and no deposition at pH 2 (Figure S11). pH effects on the morphology of electrodeposited Cu have previously been observed; however, this published work was on Cu electrodes from pH 0.5 to 4.5 with much higher [CuSO 4 ] (∼120 mM), making direct comparison difficult. For simplicity and because it produced deposition mainly on the NPs, a neutral pH was used for the remainder of the studies.…”

Section: Resultsmentioning

confidence: 93%

Synthesis of Controllable Cu Shells on Au Nanoparticles with Electrodeposition: A Systematic in Situ Single Particle Study

et al. 2023

View full text Add to dashboard Cite

Bimetallic Cu on Au nanoparticles with controllable morphology and optical properties were obtained via electrochemical synthesis. In particular, multilobed structures with good homogeneity were achieved through the optimization of experimental parameters such as deposition current, charge transfer, and metal ion concentration. A hyperspectral dark field scattering setup was used to characterize the electrodeposition on a single particle level, with changes in localized surface plasmon resonance frequency correlated with deposition charge transfer and amount of Cu deposited as determined by electron microscopy. This demonstrated the ability to tune morphology and spectra through electrochemical parameters alone. Time-resolved in situ measurements of single particle spectra were obtained, giving an insight into the kinetics of the deposition process. Nucleation of multiple cubes of Cu initially occurs preferentially on the tips of Au nanoparticles, before growing and coalescing to form a multilobed, lumpy shell. Modifying the surface of Au nanoparticles by plasma treatment resulted in thicker and more uniform Cu shells.

show abstract

Section: Resultsmentioning

confidence: 93%

Synthesis of Controllable Cu Shells on Au Nanoparticles with Electrodeposition: A Systematic in Situ Single Particle Study

et al. 2023

View full text Add to dashboard Cite

show abstract

“…For this reason, we tried more complex models, such as the Sharifker-Mostany model [31] and Tarallo model [32], but the results were not much different. The same was reposted before by many authors that studied the electrodeposition of copper [33][34][35]. The reasons proposed by the authors for the deviation from the model are due to the assumption by the Scharifker-Hills model that the crystal nucleus is hemispherical and exhibits purely diffusion-controlled growth and can be also the caused by the solution resistance.…”

Section: Chronoamperometric Studiesmentioning

confidence: 97%

Optimisation of Thiourea Concentration in a Decorative Copper Plating Acid Bath Based on Methanesulfonic Electrolyte

et al. 2022

View full text Add to dashboard Cite

The role of thiourea as an organic additive in the nucleation and growth mechanism was studied for copper deposition and its application in the decorative electroplating and fashion accessory industries. The bath was designed to reduce the environmental and ecological impacts using methanesulfonic acid as electrolyte as an alternative to alkaline cyanide baths. We evaluated the nucleation and growth mechanism of copper exploiting voltametric and chronoamperometric measurements with a brightener concentration ranging from 0 to 90 ppm. We used the Scharifker–Hills model to estimate the type of nucleation mechanism after progressive addition of thiourea. Scanning electron microscope was employed for surface analysis and morphological characterisation of the nuclei. We verified that progressive nucleation is a key step in the obtainment of a shiny and homogeneous copper film, but an excess of thiourea could cause parasitic adsorption reactions on the surface of the substrate. X-ray fluorescence spectroscopy was used for the thickness determination of the copper deposits and the electrodeposition efficiency correlated to thiourea concentration. Finally, the optimal concentration of thiourea was assessed to be 60 ppm for the used formulation of copper plating.

show abstract

“…In the literature, efforts have been made to theoretically understand the mechanisms of copper electrodeposition 31 – 33 . In turn, in the latest research, articles focusing on potential applications of composite materials containing copper and its oxides obtained electrochemically lead the way 34 – 37 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of electrochemical deposition of copper and copper(I) oxide on the carbon nanotubes coated stainless steel substrates

Marchewka

Kołodziejczyk

Bezkosty

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The nanocomposite coatings composed of carbon nanotubes and various forms of copper were prepared in the two-step process. Firstly, carbon nanotubes were coated on stainless steel substrate using electrophoretic deposition at constant current. Then, the process of electrochemical deposition using copper(II) sulphate solutions was performed under high overpotential conditions. The modification of the copper(II) cations concentration in the solution and the deposition time provided the formation of various forms of crystals. The samples and their cross-sections were observed and examined using scanning electron microscope equipped with electron dispersive spectroscopy system. The analysis of chemical composition revealed that in addition to the pure copper crystals, the crystals characterized by the presence of copper and oxygen were formed. Therefore, Raman spectroscopy was applied to determine the unknown stoichiometry of this copper oxide. The point and in-depth analysis identified copper(I) oxide in the form of different size crystals depending on the concentration of the copper(II) sulphate solution. To confirm these findings, grazing incidence X-ray diffraction measurements were also performed. the combination of the applied methods has provided the detailed description of the preparation of the nanocomposite coatings with the proposed mechanism of copper(I) oxide formation.

show abstract

Electrodeposition of copper nanopowder with controllable morphology: influence of pH on the nucleation/growth mechanism

Cited by 10 publications

References 38 publications

Synthesis of Controllable Cu Shells on Au Nanoparticles with Electrodeposition: A Systematic in Situ Single Particle Study

Synthesis of Controllable Cu Shells on Au Nanoparticles with Electrodeposition: A Systematic in Situ Single Particle Study

Optimisation of Thiourea Concentration in a Decorative Copper Plating Acid Bath Based on Methanesulfonic Electrolyte

Characterization of electrochemical deposition of copper and copper(I) oxide on the carbon nanotubes coated stainless steel substrates

Contact Info

Product

Resources

About