Document Details

Document Type : Article In Journal 
Document Title :
Preparation of silver nanoparticles using tryptophan and its formation mechanism
Preparation of silver nanoparticles using tryptophan and its formation mechanism
 
Subject : Chemistry 
Document Language : English 
Abstract : A non-toxic route was used for the preparation of silver nanoparticles using tryptophan (Trp) as reducing/stabilizing agent in the presence of cetyltrimethyl ammonium bromide (CTAB). Role of water soluble neutral polymer poly(vinylpyrrolidone) (PVP) has been studied on the growth of yellow colour silver nanoparticle formation. The synthesized nanostructures were characterized by UV-Visible absorption spectroscopy, transmission electron microscopy (TEM) by observing the size and distribution of silver nanoparticles. As the reaction proceeded, particles grew up to about 10 and 20. nm in the presence and absence of PVP, respectively, as determined by TEM. The formed nanoparticles showed the highest absorption plasmon band at 425. nm. Rate of silver sol formation increases with the [Trp], [CTAB] and [PVP], reaching a limiting value and then decreases with the increase in concentrations of these reagents. It was observed that nanoparticles are spherical, aggregated and poly dispersed in the absence and presence of PVP, respectively. On the basis of kinetic data, a suitable mechanism is proposed and discussed for the silver sol formation. 
ISSN : 0927-7765 
Journal Name : Colloids and Surfaces B: Biointerfaces 
Volume : 81 
Issue Number : 2 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Sunday, October 16, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
زويا ظهيرZaheer, Zoya ResearcherDoctorate 
مقصود أحمد مالكMalik, Maqsood AhmadResearcherDoctorate 
فوزية محمد النويصرAl-Nowaiser, Fawziya MResearcherDoctoratefalnowaiser@kau.edu.sa
ظهير خانKhan, Zaheer ResearcherDoctoratedrkhanchem@yahoo.co.in

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