Self-Movement of Water Droplet at the Gradient Nanostructure
of Cu Fabricated Using Bipolar Electrochemistry
- Publication date
- Publisher
Abstract
This
Article reports on gradient electrodeposition of copper on the surface
of a bipolar electrode (BPE). The formation mechanism of the as-fabricated
gradient nanostructure is discussed, and the effects of time, potential,
and concentration of CuSO<sub>4</sub> solution on the morphology of
the deposited structures are investigated. Scanning electron microscopy
(SEM) is used to visualize the morphology of the deposited Cu at different
positions of the BPE. By scanning from the cathodic pole to the midpoint
of the BPE, three distinct structures are observed; (i) nanodendrites,
(ii) nanodendrites in the vicinity of nanoparticles, and (iii) nanoparticles.
The BPE surface was characterized by X-ray diffraction (XRD) and X-ray
photoelectron spectroscopy (XPS) measurements. The contact angle measurement
of a water droplet reveals a surface with gradient wettability. Modification
of the as-electrodeposited Cu surface with 1-dodecanethiol provides
self-movement of the water droplet
