Synthesis and Characterizations of Cobalt Films Electrochemically Deposited from Aqueous and Non-Aqueous Media
The two films were characterized using UV-Vis Spectroscopy to determine percent absorbance, energy dispersive x-ray spectroscopy (EDS) to infer density, and scanning electron microscopy (SEM) to determine microstructure and thickness. SEM micrographs of the cobalt micro-particles differed depending on solvent (Figure 1). The SEM images and EDS spectra together show a less dense accumulation of micro-particles in the NADCFs compared to the ADCFs. Greater porosity in the 180µm thick NADCF compared to the 115µm thick ADCF was confirmed by the transmission of the x-ray beam in EDS to the copper substrate, showing copper peaks. Thicknesses were determined using cross-section analysis in SEM. The optical absorbance of both films as produced were measured. NADCFs had >99% absorbance and the ADCFs had 95% absorbance at 490nm.
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