2.3 Characterization
UV-Visible spectroscopy from a double beam spectrophotometer (UV 3000+ LABINDIA, path length 1.0 cm, spectral range from 200 nm to 800 nm) was used
for preliminary estimation of copper nanoparticles synthesis.
FTIR (ALPHA-T, Bruker) provided information about the binding interactions of L-ascorbic acid with zero valent copper particles.
Morphological study of the copper nanoparticles was carried out with SEM (EVO 18, Carl Zeiss) image analysis.
These dispersed nanoparticles were centrifuged and ultrasonicated for 40 min. 30 μL aliquots were then extracted and deposited on stub for SEM analysis.
Ultrasonicated dispersed suspension was mounted on carbon coated copper grid and TEM (FEI Techni G2S2 Twin) images were recorded to confirm size distribution and shape homogeneity of synthesized copper nanoparticles.