Biosynthesis of Silver Nanoparticles Using Red Algae Portieria Hornemannii

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Biosynthesis of Silver nanoparticles utilizing Red algaePortieria hornemannii


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Nanotechnology is regarded as one of the most wanted Fieldss of research in the present scientific universe. The applications of nanoparticles scopes from pharmaceuticals, Even though the synthesis of nano atoms can be done by agencies of physical, chemical and green methods, owing to the eco friendly belongingss, the 3rd method is taken to a greater extend these days..Here in the present survey, the word picture of Ag nanoparticles synthesised from the ruddy algae by agencies of UV-visible spectroscopy, FTIR, XRD, NMR and optical microscopy.The Ag nanoparticle formation was confirmed at… ..nm with the aid of UV spectrophotometer.The form of the Ag nanoparticles was found to be spherical when viewed under optical microscopeIn this survey we have established an environmental friendly synthesis of Silver nanoparticles utilizing the ruddy algaePortieria hornemannii. The synthesis of nanoparticles took topographic point after 48 hours of incubation at room temperature. Nanoparticles synthesized were confirmed by UV-Visible spectrometry surface Plasmon resonance at 4… nanometer. The synthesized nanoparticles were farther characterized by Fourier transformed infrared spectrometry ( FT-IR ) , X-ray diffraction ( XRD ) , Energy scattering… … . spectrometry ( EDAX ) and Scaning negatron microscopy. The synthesized nanoparticles were found to be active against the fish pathogensVibrio harveyii,Vibrio parahaemolyticus,VibrioalginolyticusandVibrio anguillarum.The highest activity was found against the pathogensVibrio harveyiiandVibrio parahaemolyticus.


Nanotechnology can be defined as the scientific discipline which deals with th nano sized atoms and involves in the synthesis of nanosized atoms runing from 1 to 100nm ( Sharma and Yangard,2009 ) . This field gained broad acknowledgment in the mid 20Thursdaycentury.This involvement was due to their alone electronic, magnetic, chemical and optical properties.Nanotechnology revolves around the production of nano sized atoms by seperation, consolidation and distortion of stuffs of one atom or molecule. When the molecules are seen in big majority they exhibit unvarying physical every bit good as chemical belongingss but at the nano size degrees, there arises a alteration in the overall nature of the substance. This self-generated alteration is due to the high surface volume ratio. The influence of nano atoms in human life is to by a figure of agencies ( Singh et al 2010 ) . It has a big figure of applications in industrial every bit good as medical sector.The applications in industrial sector ranges from fabric technology, biotechnology and biotechnology ( Niemeyer,2001 ) , H2O intervention ( Solov‘, 2007 ) , electronics ( Lee and Jeong ) , antibacterial or fungicidal belongingss besides they are major constituents in a diverse scope of consumer merchandises: air sanitizer, sprays, socks, pillows, slippers, inhalators, detergents, cell phones, shampoo, etc. The formation of nano atoms are formed under 3aspects:1 ) Dry nanotechnology 2 ) Wet nanotechnology 3 ) computational nanotechnology (,2012 ) . In the field of medical specialty, nanotechnology has been employed in presenting drugs, heat, visible radiation or other substances to specific types of cells particularly malignant neoplastic disease cells. Atoms are engineered in such a manner that the morbid cells attracts them leting direct intervention of those cells.The harm to healthy cells while utilizing nano atoms is minimum or nil doing them a good option for tumour intervention. Furthermore nano atoms have been employed in diagnostic techniques handling infective diseases, mending of damaged cells etc. The conventional methods of synthesizing nano atoms include physical and chemical methods.This includes micelle formation, sol procedure, chemical precipitation, hydrothermal method, chemical vapour deposition and pyrolysis ( Leela and Vivekanathan 2008 ) . Nanoparticles synthesis need a really good beginning of metals and they are produced from elements like gold, Ag, Bi, Pt, Pd etc ( Roy and Barik 2010 ) . Metallic elements are an ineluctable facet in nanotechnology since it has legion applications in electronics, cosmetics, coatings, packaging and biotechnology. Preparation of Ag nano atoms has attracted peculiarly considerable attending due to their diverse belongingss and utilizations like magnetic and optical polarizability, electrical usage due to the highest electrical and thermic conduction among metals, contact action, surface-enhanced Raman dispersing.Some of the methods of nano atom synthesis are really easy to execute but the general stableness of the merchandise is sometimes compromised. Furthermore it is energy inefficient and needs more capital support for the research intents ( Klauset Al2001 ) .To overcome these defects, biogenesis or green synthesis of nano atoms have been employed.It is more or less low-cost procedure.Besides this it is environmental friendly and biocompatible ( Govindraju et al 2010 ) . For the biogenesis of nanoparticles, both workss and bugs ( bacteriums and Fungis largely ) can be used. In bacteriums and Fungis, the development of nano atoms take topographic point intracellularly ( Mandal et al 2006 ) . In the instance of workss their infusions are used for the production of nano atoms. The works resources in the Marine environment are least used in research methods for synthesising nano atoms. The algae particularly are a rich beginning of economically of import constituents and hence their current public-service corporation can be improved by implementing nanotechnology methods.

Algae constitutes a big category of the marine ecosystem. They are classified fundamentally into 3 based on the pigments in them. They are rhodophyta, Chlorophyta and Phaeophyta. Rhodophyta or ruddy algae are largely marine with really few exclusions. ( Eloranta and Kwandrans, 2004 ) . Rhodophyta is characterized by the presence of phycoerythrin and phycocyanin along with floridean amylum C ( Elaronta and Kwandrans,2004 ) . They are used as gelling agents every bit good as stabilising agents ( Roeck-Holtzhauer,1991 ) in nutrient stuffs.They possess proteins that can function as neutraceuticals ( Monika,2011 ) .They are found to possess big figure of secondzry metabolites that possess pharmaceutical ( PrashantKumar,2006 ) and industrial significance ( Cannell,2006 ; Fernandez,1989 ) .Some species of ruddy algae like,Gracilariaalgae are found to hold antioxidant belongingss ( Kang,2005 ) .Apart from that they besides possess anti-inflammatory and anti-cancer belongingss (,2013 ).Owing to these high value belongingss, ruddy algae can be used to bring forth nanoparticles.But the research on the production of nanoparticle from rhotophyta has someway been less.

In the present survey, the word picture of ruddy algae is perfomed by agencies of UV spectrometry, FTIR, XRD, optical microscope and NMR.This is done to analyze the physical and chemical belongingss so that in future they can be used to develop much better merchandises that are utile to worlds with extra benefits of being ecofriendly.

Portieria hornemannii is a species of ruddy algae. Previous surveies have merely focused on chemicals and anti oxidant activity ofPortieria hornemannii. To our cognition we are the first to describe the biogenesis of Silver nanoparticles utilizingPortieria hornemannii

Materials and methods

Collection of Red algae

The ruddy algae (Portieria hornemanni) was collected from the gulf of mannar during Feb 2014 by snorkelling. The algal samples were brought to the research lab in polyethylene bags. The samples were washed exhaustively utilizing running tap H2O to take the sea salt, air plants and other drosss. The Cleaned algae were shade dried at room temperature and powdered utilizing an electrical liquidizer.

Preparation of the Red algae infusion

The powdery algae were used for the readying of the infusion. One gm of algal pulverization was weighed, added in 50 milliliter of deionized H2O and boiled in a H2O bath for 5 min in 80a?°C.

The infusions were cooled in room temperature and filtered utilizing Whatman filter paper. These infusions were used as both cut downing and stabilising agents. [ 1 ]

Synthesis of eco-friendly Ag nanoparticles

Silver nitrate solution ( 45ml ) was prepared with 1mM concentration and 5 milliliter of algal infusion was added to it drop by bead with continous stirring at room temperature. During this procedure the coloring material of the solution appears to be pale pink. With incubation of 24-48 hours the coloring material alterations to dark brown stand foring the formation of nanoparticles.

Word picture

UV-visible spectrometry is one of the most normally used methods to observe the nanoparticle formation and its properties.The spectrum surface plasmon resonance of nanoparticles is influenced by assorted factors of the same which includes size, form, free negatron denseness, the medium in which it is present besides the interaction between the atoms ( the formation of AgNPs have occurred or non was analysed wih the aid of UV-visible spectroscope.The reaction mixture assumed to incorporate nanoparticles was subjected to changing wavelengths runing from 400nm to 500nm and the extremum was studied to find the wavelengths at which nanoparticles got synthesized.

Fourier Transform Infrared Spectroscopy or FTIR plays an of import function in analyzing the surface absorbants present in nanoparticles.Since the nanoparticles are characterized by the presence of big surface country, adsorbates can act upon in the coevals of new belongingss and therefore extra extremums when compared to the bare nanoparticle.Hence FTIR can be used to analyze the new belongingss associated with the presence of adsorbable particles.Resolutions of all the atoms are measured here all the clip ( Peter and James,2007 ) .For FTIR, the powdery signifier of the ruddy algae sample was used and the little sum of it was studied with the aid of FTIR spectrophotometer ( ALPHA T, Brucker ) .The declaration was studied at… .. with the aid of… .at room temperature incorporating… . sum of sample at wavenumber of… … .

The crystalline nature of the nanoparticles was studied with the aid of Xray diffraction method.This is a dependable method to analyze crystal construction, size and strain of the particles.The random orientation of the crystalline atoms can take to the widening of the atoms ( Akbari,2011 ) .Powdered sample of ruddy algae was subjected to Xray diffraction by agencies of Xray diffractometer ( D8 advanced, Bruker ) inorder to analyze its crystalline nature.The size of the Ag nanoparticles obtained was studied with Scherrer’s equation by ab initio happening the breadth with the aid of Bragg contemplation.

Nuclear magnetic resonance can be used to analyze the physical belongingss of nanoparticles at an atomic degree ( Kwanghyo and Zeehoon,2013 ) .This is done by the soaking up and re-emission of electromagnetic radiation by the karyon of the atoms in magnetic field.The physical belongingss of ruddy algae nanoparticles were analysed with the aid of with samples dissolved in methyl alcohol.

The light microscopy is a method to analyze the forms of nanoparticles.Here the samples taken into consideration are aerosols and powders.It is a individual atom technique and it helps in analyzing atom whose size is greater than 1µm.However the declaration can be affected by the strength of light wavelength ( Phileppe ) .The analysis of the powdery ruddy algae nanoparticles were done the optical microscope ( Olympus BX61 ) , which had package analySYS and the images were studied.

In Vitro antimicrobic activity

The in vitro antibacterial analysis was done against the fish pathogenic bacteriumsVibrio harveyii, vibrio parahaemolyticus, Vibrio alginolyticusandvibrio anguillarum.Agar diffusion method was carried out for this check. Brain bosom extract stock was used for culturing the pathogens. Nightlong civilization with the cell denseness 10E‰4CFU/ml were

Consequences and Discussions

UV-Visible Spectroscopy

XRD form of Silver nanoparticles

Fournier transform infra ruddy spectrometry

Scaning negatron microscopy

Energy scattering absorbtion spectrometry

Antimicrobial activity of PH Ag nanoparticles


In this survey we have validated a eco-friendly and cost effectual synthesis of Ag nanoparticles.


Green synthesis of Ag nanoparticles utilizing Alternanthera dentata foliage

infusion at room temperature and their antimicrobic activity

Deenadayalan Ashok Kumar a, V. Palanichamy a, ? , Selvaraj Mohana Roopan

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Biosynthesis of Silver Nanoparticles Using Red Algae Portieria Hornemannii. (2016, Dec 08). Retrieved from

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