Abstract
AbstractWe have used simple chemical route to synthesize delafossite silver ferrite (AgFeO2) nanoparticles (NPs). AgFeO2 NPs were utilized as Raman substrate for detection of Rhodamine 6G (R6G) molecules. AgFeO2 NPs substrate show excellent Surface‐enhanced Raman Scattering (SERS) activity, which enables ultrasensitive detection of R6G with a concentration down to 1 picomolar (1 pM) with an enhancement factor (EF) of 1.6×1010. The observed SERS signal enhancement in this AgFeO2 NPs system is attributed to a combination of electromagnetic (EM) enhancement, charge ‐ transfer (CT) effect between R6G analyte molecules and AgFeO2 NPs surface and Resonance Raman (RR) effect. Further, AgFeO2 NPs were used to study its antibacterial activity against certain different pathogenic bacteria. The antibacterial studies showed that the AgFeO2 NPs possesses potential inhibitory effect against both Gram‐negative and Gram‐positive bacteria. In addition, AgFeO2 NPs was found cytotoxic to yeast cells. The stable aqueous colloids of AgFeO2 NPs may find potential applications in the biomedical field as a sensing platform for the trace level detection of analyte molecules and antimicrobial agent.
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