Silver nanoparticles: synthesis and size control by electron irradiation

Abstract

Silver nanoparticles were synthesized by irradiating solutions, prepared by mixing AgNO3 and poly-vinyl alcohol (PVA), with 6 MeV electrons. The electron-irradiated solutions and the thin coatings cast from them were characterized using the ultraviolet–visible (UV–vis), x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) techniques. During electron irradiation, the process of formation of the silver nanoparticles appeared to be initiated at an electron fluence of ∼2 × 1013 e cm−2. This was evidenced from the solution, which turned yellow and exhibited the characteristic plasmon absorption peak around 455 nm. Silver nanoparticles of different sizes in the range 60–10 nm, with a narrow size distribution, could be synthesized by varying the electron fluence from 2 × 1013 to 3 × 1015 e cm−2. Silver nanoparticles of sizes in the range 100–200 nm were also synthesized by irradiating an aqueous AgNO3 solution with 6 MeV electrons.

Photo-induced growth of silver nanoparticles using UV sensitivity of cellulose fibers

“…Silver nanoparticles have been synthesized by either direct evaporation of silver into a liquid medium, such as laser ablation [6][7][8][9], or by reducing silver ions chemically [10][11][12] or through irradiation by electrons [13], ultraviolet (UV) light [14] or Gamma ray [15,16]. To load silver nanoparticles on the surface of fibers, the fibers are usually exposed to a silver nanoparticle sol, resulting in random attachment of nanoparticles on the surface [17][18][19].…”

Synthesis of silver nanoparticles by using tea leaf extract from Camellia Sinensis

“…The primary challenge in this focal area is the maximization of the usage of environmental friendly materials in the generation of metal nanoparticles. Various chemical and physical methods have been employed to prepare silver nanoparticles with different sizes and shapes, such as UV irradiation, 1,2 microware irradiation, 3,4 chemical reduction, [5][6][7] photochemical method, 8,9 electron irradiation, 10,11 and sonoelectrochemical method. 12 However, most of the reported methods involve more than one step, high energy requirement, low material conversions, difficulty in purification, and hazardous chemicals.…”

An Overview on Nanocrystalline ZnFe2O4, MnFe2O4, and CoFe2O4 Synthesized by a Thermal Treatment Method

“…Metal spinel ferrite nanoparticles have the general molecular formula MFe 2 O 4 (e.g., M = Ni, Zn, Mn, Co, or Mg), and they have a facecentered-cubic (fcc) close packing structure. Among the spinel ferrites compounds, zinc ferrite, manganese ferrite, and nickel ferrite have been studied extensively due to their different structures composed of inverse, normal, and mixed spinel structures, respectively, and their high electromagnetic performance, excellent chemical stability, mechanical hardness, low coercivity, and moderate saturation magnetization, which make it a good contender for the application as soft magnets and low-loss materials at high frequencies [1][2][3]. These properties are dependent on the chemical composition and microstructural characteristics in which the particle size and shape might be controlled in the fabrication processes.…”