Comprehensive study on surfactant role on silver nanoparticles (NPs) prepared via modified Tollens process

Silver Nanoparticles: Green Route, Stability and Effect of Additives

“…It should be emphasized that the solutions were non-opalescent before as well after the addition of Br -as viewed by the naked eye. tion and their concentration play a major role in controlling the Ag-NP size and shape [27,[47][48][49]. In order to gain insight into the role of ammonia, the oxalic acidsilver(I) reaction was also studied in presence of [ammonia].…”

Silver Nanoparticles

“…Polydispersity also decreased in response to decreases the pH. Produced silver nanoparticles were stabilized and protected by sodium dodecyl sulfate (SDS), polyoxyethylenesorbitane monooleate (Tween 80), and polyvinylpyrrolidone (PVP 360) Soukupova et al 2008). …”

A Series of Monodisperse Silver Nanoparticles by a One-Pot Synthesis

“…29 Shortly after NaBH 4 solution is injected into the mixture solution of AgNO 3 and SDS, silver clusters are initially formed by the reduction of Ag þ in the microspace which is surrounded by the hydrophilic group (anionic portion) of SDS, and Ag þ outside the micelle are attracted toward the silver cluster, so Ag NPs grow up with the reaction time. 30 According to the reports of Liu et al 31 and Song et al, 25 when a small amount of NaBH 4 was used, the boron hydroxide generated through hydrolysis of NaBH 4 32 was absorbed to the Ag nuclei, reducing the electron density of surfaces and causing profound aggregation of Ag nuclei, in which the larger and baddispersed Ag nuclei was formed. On the other hand, when excess amount of NaBH 4 was used, thick BH À 4 layer prevented the boron hydroxide from absorbing to the Ag NPs surfaces, resulting in smaller and well-dispersed nanoparticles.…”