Abstract
The synthesis of silver nanoparticles of varying size has been achieved using different molar concentrations of NaOH while the effect of changing the temperature has been studied. AgNO3, gelatine, glucose and NaOH are used as a silver precursor, stabilizer, reducing agent and accelerator respectively. The synthesized nanoparticles have been characterized by a FESEM study, X-ray diffractometry, Raman spectroscopy and UV-vis spectroscopy. The colloidal sols of the silver nanoparticles in a biopolymer gelatine show strong surface plasmon resonance absorption peaks. The visible photoluminescence emission from the synthesized silver nanocrystals has been recorded within the wavelength range of 400–600 nm under UV excitation. The synthesized nanoparticles may be extremely useful in making biosensor devices as well as for other applications.
Highlights
Silver nanoparticles (Ag‐NPs) have been widely used during the past few years in various applications, such as biomedicine, biosensors, catalysis, pharmaceuticals and photonics [1, 2]
The preparation of Ag‐NPs have been reported by several researchers giving well‐dispersed Ag‐NPs [8] and using various polymers, such as polyethylene glycol [9], poly methyl methacrylate (PMM) [10], poly vinyl alcohol (PVA) [11], polyaniline [12] and polyacrylonitrile (PAN) [13]
We have demonstrated a simple green synthesis route to prepare high purity Ag‐NPs with a glucose reduction of aqueous AgNO3 at different molar concentrations of NaOH used as a reaction accelerator
Summary
Silver nanoparticles (Ag‐NPs) have been widely used during the past few years in various applications, such as biomedicine, biosensors, catalysis, pharmaceuticals and photonics [1, 2]. The preparation of Ag‐NPs have been reported by several researchers giving well‐dispersed Ag‐NPs [8] and using various polymers , such as polyethylene glycol [9], poly methyl methacrylate (PMM) [10], poly vinyl alcohol (PVA) [11], polyaniline [12] and polyacrylonitrile (PAN) [13] Natural polymers, such as natural rubber [14], polysaccharides [15], cellulose [16], chitosan [17] and starch [18], have been used as matrices or stabilizers for the preparation of metallic nanoparticles because of their non‐toxicity and biocompatibility. We report here the synthesis of silver nanoparticles by a simple chemical process using gelatine as a capping agent and glucose as a reducing agent with NaOH as an accelerator
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