Green synthesis of silver nanoparticles using aqueous extract of hot chili pepper fruits and its antimicrobial activity against Pseudomonas aeruginosa

Abstract

Green synthesis of different nanoparticles using the plants aqueous extracts has several advantages over other methods due to the environmentally favorable nature of plants. moreover, such approach is also cost effective. This work describes the biosynthesis of silver nanoparticles (Ag-NPs) with the use of the aqueous extract of dry pericarps of hot chili peppers and cv. Carolina Reaper) with different levels of pungency and their antibacterial effect on the antibiotic resistant Pseudomonas aeruginosa. Phytochemical screening of pericarp tissues showed great distinction in contents of phenolic compounds and capsaicinoids as potential reducing agents wich correlated with total antiradical activity as analyzed by reduction of DPPH radicals. The biosynthesized Ag-NPs were characterized by UV-vis spectrophotometry and scanning electron microscopy (SEM). The average size of the nanoparticles in both samples was less than 25 nm. Іnitial concentration of both samples of Ag-NPs inhibited P. aeruginosa growth with equal efficiency.

ZnO and Ag NP-decorated ZnO nanoflowers: green synthesis using Ganoderma lucidum aqueous extract and characterization

“…Then, to test the effectiveness of the synthesis of the AgNP-decorated ZnO NPs, four experimental mixtures were made: 2 mL of the ZnO NP solution was mixed with 2 mL of 0.001 M silver nitrate (AgNO 3 ); 1 mL of the ZnO NP solution was mixed with 3 mL of 0.001 M silver nitrate (AgNO 3 ); 3 mL of the ZnO NP solution was mixed with 1 mL of 0.001 M silver nitrate (AgNO 3 ); and 2 mL of the ZnO NP solution was mixed with 2 mL of 0.001 M silver nitrate (AgNO 3 ) and 1 mL of chili pepper ( Capsicum annuum ) fruit extract, which was pre-prepared according to the method described in ref. 23.…”

Potency of phytosynthesized silver nanoparticles from Lathraea squamaria as anticandidal agent and wheat seeds germination enhancer

“…For the reduction of silver ions, 10 mL of extract was mixed with 40 mL of silver nitrate. The resulting solution was incubated under a light-emitting diode lamp (Secret Jardin, 42 W, 6500 K) for 1.5 h at room temperature for the development of AgNPs according to Smirnov et al 2021 .…”

Plasmonic colloidal Au nanoparticles in DMSO: a facile synthesis and characterisation

“…Numerous methods of synthesis of colloidal NPs have been developed so far, 1,2,14, [24][25][26][27] with the facile methods of producing bio-compatible NPs being one of the main research focuses in the community. [28][29][30] Among the most oen used syntheses is the one leading to a colloidal system of spherical gold NPs based on a simple reaction reducing auric acid with either sodium citrate or sodium borohydride. 31 Sodium citrate is particularly interesting, as it is cheap and nontoxic and it does not only act as the reducing agent but its negatively charged carboxylates are also responsible for the charge stabilization of the AuNPs.…”

“…Numerous methods of synthesis of colloidal NPs have been developed so far, 1,2,14,24–27 with the facile methods of producing bio-compatible NPs being one of the main research focuses in the community. 28–30…”