Gold nanoparticles supported on chitosan and the ameliorative response on Raman scattering sensing, catalytic reduction, antibacterial and cytotoxicity activities

In the present study, nanostructures comprising of gold nanoparticles supported on a natural polysaccharide matrix chitosan (Au/CS) were successfully synthesized. The fabricated Au/CS was characterized and investigated for their effectiveness as a surface-enhanced Raman scattering sensing platform for aqueous solutions of malachite green and crystal violet dyes with low detection limits. The Au/CS nanocomposites could serve as a catalyst for efficient degradation of Congo red dye and Cr (VI) metal under reduction process. The removal was found 100