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LASiS is considered a "green" method due to its lack of use for toxic chemical precursors to synthesize nanoparticles. [3] [4] [5] In the LASiS method, nanoparticles are produced by a laser beam hitting a solid target in a liquid and during the condensation of the plasma plume, the nanoparticles are formed. Since the ablation is occurring in a ...
The co-reduction method is similar to that of the reduction method used in the synthesis of monometallic nanoparticles. The difference is that for bimetallic nanoparticle synthesis two metal precursors will be used instead of one. The two precursors along with the stabilizing agent are completely dissolved in a suitable solvent.
The nanoparticles formed in this method have a size range between 5 and 15 nm and consist of silver hydrosol. The reduction of the silver nanoparticles is thought to come from an enzymatic process and silver nanoparticles produced are extremely stable due to interactions with proteins that are excreted by the fungi.
Researchers attribute the reduction in beam divergence to improved dn/dT characteristics of the organic-inorganic dye-doped nanocomposite. The optimum composition reported by these researchers is 30% w/w of SiO 2 (~ 12 nm) in dye-doped PMMA. Nanoparticles are being investigated as self-cleaning paint [163] and potential drug delivery system. [164]
Other reduction methods Silver nanoclusters are also formed by reducing silver ions with gamma rays, microwaves, or ultrasound. For example silver nanoclusters formed by gamma reduction technique in aqueous solutions that contain sodium polyacrylate or partly carboxylated polyacrylamide or glutaric acids .
Nanoparticles or nanocrystals made of metals, semiconductors, or oxides are of particular interest for their mechanical, electrical, magnetic, optical, chemical and other properties. [31] [32] Nanoparticles have been used as quantum dots and as chemical catalysts such as nanomaterial-based catalysts.
The method is used for the fabrication of metal oxides, especially the oxides of silicon (Si) and titanium (Ti). The process involves conversion of monomers in solution into a colloidal solution ( sol ) that acts as the precursor for an integrated network (or gel ) of either discrete particles or network polymers .
One method of generation of AgNPs is the reduction of the raw material, silver nitrate, to elemental silver using a reducing agent such as trisodium citrate. AgNPs are synthesized using microwave irradiation , [ 4 ] gamma irradiation [ 6 ] UV activation, [ 7 ] or conventional heating [ 8 ] of the precursor silver nitrate, AgNO 3 using an ...