Fig. 1

FT-IR pattern of carboxylated silver coated single walled carbon nanotubes (SWCNTs-Ag) treated with Tri-sodium citrate (TSC). The FT-IR spectra of SWCNTs-Ag treated with TSC using different ratios was investigated for the observation of the characteristic peaks related to carboxyl group. a TSC-SWCNTs-Ag (1:20); b TSC-SWCNTs-Ag (1:10); c TSC-SWCNTs-Ag (1:7.5); d TSC-SWCNTs-Ag (1:5); e SWCNTs-Ag; f TSC. The characteristic peaks on TSC and various TSC treated SWNTs-Ag such as carboxylic group stretches such as –COOH at 3300 cm⁻¹ and –COO at 1300 and 1700 cm⁻¹