Figure 3
FTIR spectra of sepiolite and the Sep/DNA bionanocomposite prepared in 10 mM Tris-HCl pH = 7.5 compared to Sep/DNA bionanocomposites prepared in the presence of monovalent (A: NaCl, B: KCl), divalent (C: CaCl2, D: MgCl2), trivalent (E: spermidine) and tetravalent (F: spermine) cations.
