UV–vis Study on β‐Cyclodextrin as Dual Function for Synthesis AgNPs and Antibacterial Application

Abstract

AbstractThe current study reveals the synthesis of silver nanoparticles (AgNPs) with β‐cyclodextrin (β‐CDs) as a dual function, reducing, and stabilizing agent. UV–vis study is carried out to monitor the optimum condition of AgNPs formation. It is observed that setting pH at 12, 1:33 concentration ratio of AgNO3 to β‐CDs, and 5 min of incubation time are the optimum condition to synthesize AgNPs. The stability of AgNPs 4 weeks after synthesized is confirmed by the UV–vis spectra. Fourier transform infrared (FTIR) characterization reveals there is a peak appearing assigned to C=O which proves a redox reaction occurs between AgNO3 and β‐CDs. Gram‐positive (Bacillus subtilis and Staphylococcus aureus) and Gram‐negative bacteria (Escherichia coli and Pseudomonas aeruginosa) are tested to investigate the antibacterial activity of AgNPs. This study shows that AgNPs exhibit inhibition of bacterial growth.