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Synthesis of silver nanoparticles with antibacterial activity using the lichen Parmotrema praesorediosum

Authors Mie R, Samsudin MW, Din L, Ahmad A, Ibrahim N, Adnan S

Received 31 July 2013

Accepted for publication 10 October 2013

Published 19 December 2013 Volume 2014:9(1) Pages 121—127


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Ropisah Mie,1,2 Mohd Wahid Samsudin,1 Laily B Din,1 Azizan Ahmad,1 Nazlina Ibrahim,3 Siti Noor Adnalizawati Adnan3

1School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Selangor, 2Faculty of Applied Sciences, Universiti Teknologi MARA Negeri Sembilan, Negeri Sembilan, 3School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Selangor, Malaysia

Abstract: Development of a green chemistry process for the synthesis of silver nanoparticles has become a focus of interest. This would offer numerous benefits, including ecofriendliness and compatibility for biomedical applications. Here we report the synthesis of silver nanoparticles from the reduction of silver nitrate and an aqueous extract of the lichen Parmotrema praesorediosum as a reductant as well as a stabilizer. The physical appearance of these silver nanoparticles was characterized using ultraviolet-visible spectroscopy, electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction techniques. The results show that silver nanoparticles synthesized using P. praesorediosum have an average particle size of 19 nm with a cubic structure. The antibacterial activity of the synthesized silver nanoparticles was tested against eight micro-organisms using the disk diffusion method. The results reveal that silver nanoparticles synthesized using P. praesorediosum have potential antibacterial activity against Gram-negative bacteria.

Keywords: silver nanoparticles, lichens, Parmotrema praesorediosum, antibacterial activity

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