Abstract
Nanomaterials are attracting a lot of attention nowadays as they show different chemical and physical properties that are dependent on their size and shape. Different techniques have been used for synthesis metal nanoparticles but the use of plants for synthesis of nanoparticles could be advantageous over other environmentally methods as this eliminates the cost and the non toxicity is main feature. Here a simple biosynthesis approach was applied and gold nanoparticles were synthesized by using psidium guajava leaf extract as reducing and capping agent. Two different parameters were studied which are the metal ion concentration and volume of plant broth. The synthesis of gold nanoparticles was also monitored as function of reaction time. The formation of gold nanoparticles was monitored by UV-Vis spectrophotometer and the size of particles was confirmed by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) techniques. TEM analysis showed that the AuNPs were mostly spherical in shape with an average size of 15 nm. Fourier Transform Infrared (FTIR) spectroscopy that the active biomolecules present in the Psidium guajava leaf extract act as capping and stabilizing agent for the AuNPs.
Highlights
Considerable attention has been made towards metal nanoparticles due to their unique properties that are different from their bulk metals
Many attempts have focused on the use of green synthesis approach [4]
While the chemical composition of nanoparticles is important, even more important is the morphology of the nanoparticles and their surface properties. Many biological systems, such as fungi, bacteria and plants have been studied for gold nanoparticles synthesis plantbased nanoparticle synthesis can be more advantageous over other biological system methods since they are readily available, non toxic, the reaction rate for the Psidium guajava belong to the family of Maystrecea its widely growth in many countries and it has long history with folk medicine as it has antimicrobial, inflammatory activities antimalarial and antitumor [12,13,14,15]
Summary
Considerable attention has been made towards metal nanoparticles due to their unique properties that are different from their bulk metals They have wide applicability in different areas including biology, chemistry, medicine and optoelectronics [1,2,3]. Gold nanoparticles exhibit novel optical and catalytic properties While the chemical composition of nanoparticles is important, even more important is the morphology (size and shape) of the nanoparticles and their surface properties Many biological systems, such as fungi, bacteria and plants have been studied for gold nanoparticles synthesis plantbased nanoparticle synthesis can be more advantageous over other biological system methods (microbial) since they are readily available, non toxic, the reaction rate for the. The use of aqueous leaf extract of psidium guajava as reducing and capping agent for gold nanoparticles synthesis is reported
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