Growth Kinetics of Silver Bromide Nanoparticles in Aqueous Nonionic Surfactant Solutions

Abstract

The synthesis of silver bromide nanoparticles has been studied by many researchers because of their wide ranges of applications. This article reports on the growth kinetics of silver bromide nanoparticles in the presence and absence of aqueous nonionic surfactant media. The effects of different parameters such as the reactant concentration, the temperature, and the presence of a nonionic surfactant have also been studied. It was found that these parameters have significant effects on the process of growth kinetics, as well as on the equilibrium particle size. In pure aqueous media, the particle size decreases with increasing reactant concentration. The presence of nonionic surfactant (TX-100) significantly lowers the AgBr particle size compared to that obtained in pure aqueous media.

Direct Visualization of Symmetry Breaking During Janus Nanoparticle Formation

“…A typical UV‐visible spectrum of this suspension (C CB[5] = C AgNO3 = 0.34 × 10 −4 M) can be seen in Figure 1b. The strong peak around 200 nm corresponds to AgNO 3 absorption, while the shoulder‐like absorption in the visible region is attributed to that of silver halide NPs, as previously reported for AgBr NPs by Ray et al36 The assignment of these peaks to silver‐halide NPs was further confirmed by a decrease of the absorption upon addition of ammonia to the quartz cuvette, which leads to the dissolution of the silver halide (Figure 1b). No characteristic Ag 0 NP plasmon peak (around 400 nm) is observed before or after the dissolution by ammonia, which suggests the absence of Ag 0 NPs in solution.…”

Fluorometric sensing of ultralow As(iii) concentrations using Ag doped hollow CdS/ZnS bi-layer nanoparticles

“…AgBr nanoparticles were synthesized in aqueous media following the reported protocol. 54 Equimolar concentrations of AgNO 3 and KBr were maintained (0.1 mM each) for the synthesis of the core. After the equilibrium time (∼30 min) for AgBr formation, the particles were dispersed in SDBS (concentration 1.5 times CMC) and sonicated using a bath sonicator for 20 min.…”

Comparative Study of Antimicrobial Activity of AgBr and Ag Nanoparticles (NPs)

“…Typically, the AgCl NPs can be prepared in the form of cubic nanoparticles with sizes between 120 and 250 nm [ 42 ] or nanowires that are composed from nanoparticles with diameters of tens of nanometers [ 43 ]. AgBr NPs can be prepared in the form of spheres with sizes of units of nm [ 44 ], spherical nanoparticles with sizes from 70 up to 140 nm [ 45 ], porous spherical structures with average dimensions of about 150–200 nm and pore size of about 5–10 nm [ 46 ] or bipyramids and polyhedrons [ 47 ]. Finally, AgI NPs can be prepared in the form of plate-like nanoparticles with polygonal faces of diameter equal to 300 nm and the thickness of 50 nm [ 48 ] as well as also in the form of spherical nanoparticles with diameter of several tens of nm [ 49 – 50 ] or hundreds nm [ 51 ].…”