Stabilizing Ag Nanoparticles Using Anatase TiO2 and Cu on Al Surface | Asian Journal of Physical ...

An active surface-enhanced Raman scattering (SERS) substrate was created by chemically adsorbing anatase TiO2, silver nanoparticles (Ag NPs), and copper particles (Cu Ps) on an aluminium (Al) surface. Both silver (Ag) and copper (Cu) are considered to be reduced by TiO2 (Cu). Cu has a more negative redox potential than Ag, so Ag NPs remain unoxidized in an oxidising climate. As a result, Ag is shielded from oxidation by Cu. Despite the fact that Ag NPs have higher SERS activity than Au NPs, Ag is easier to oxidise, which limits the production of Ag-based nanomaterials. Despite the fact that Au nanoparticles have a lower SERS activity than Ag nanoparticles, they have been commonly used. The stabilisation of Ag nanoparticles using an anatase TiO2 reductive method is defined in this paper. According to Raman spectra, the fabricated substrates containing anatase, Ag NPs, and Cu Ps were stable and remained unchanged for more than two months.

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