Characterization of screw dislocation-driven growth in nickel micro-nanostructure electrodeposition process by AFM

•In low supersaturation, screw dislocation is predominate growth in electrocrystalization process.•The role of boric acid in change of micro-nano structures by reducing the supersaturation of solution was investigated.•The AFM images and height profiles clearly showed the key parameters in mechanism...

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Bibliographic Details
Published in:Materials letters 2018-01, Vol.210, p.341-344
Main Authors: Rahimi, Ehsan, Davoodi, Ali, Kiani Rashid, Ali Reza
Format: Article
Language:English
Subjects:
AFM
Atomic force microscopy
Boric acid
Coated electrodes
Electrodeposition
Materials science
Microscopy
Nanostructure
Nanostructured materials
Nickel
Nickel coatings
Nuclear electric power generation
Screw dislocation
Screw dislocations
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Summary:•In low supersaturation, screw dislocation is predominate growth in electrocrystalization process.•The role of boric acid in change of micro-nano structures by reducing the supersaturation of solution was investigated.•The AFM images and height profiles clearly showed the key parameters in mechanism of screw dislocation growth. In this study, nickel coating with micro-nanostructure feature was fabricated by a simple two-step method during electrodeposition process. To evaluate surface morphology characteristics, the histogram and power spectral density analyses of atomic force microscopy data were extracted from two different morphologies of nickel films. Results showed that boric acid plays an important role in the control of nucleation and the growth of micro-nanostructures. With clear observation of growth steps in atomic force microscopy characterization, terrace width and spiral growth proved the existence of screw dislocation growth.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2017.09.057