Review Article
Austin J Nanomed Nanotechnol. 2019; 7(1): 1054.
A Review: Green Synthesis of Nanoparticles from Seaweeds and Its some Applications
Roy S*
Department of Marine Sciences, Annamalai University, India
*Corresponding author: Suparna Roy, Department of Marine Sciences, Annamalai University, Centre of Advanced Study in Marine Biology, Tamilnadu, India
Received: May 10, 2019; Accepted: May 31, 2019; Published: June 07, 2019
Abstract
Since last decade, for the need of bio-safety, peoples are trying to replace all chemical originated metal Nanoparticles by eco-friendly bio-originated Nanoparticles, as the chemical originated Nanoparticles have hazardous effect to the environment. Therefore, researchers tried biological sources to biosynthesize the Nanoparticles to reduce its hazardous effects. The marine renewable resources are available throughout the year, so researchers are focus to marine resources such as marine macro algae and microalgae, mangrove, and sea grasses. The marine macro algae are abundantly available throughout the year along the coastal areas of India and different parts of the world. There are approximately 841 seaweeds are identified from Indian coastal area. Some of them are utilized for biosynthesis of Silver, Gold and metallic Nanoparticles. This review is focus on the accumulation of some marine macro algae, which yet use for biosynthesis of Nanoparticles and its application in some major industrial field.
Keywords: Nanoparticles; Biosynthesis; Anti-foulants; Dye degradation; Applications
Introduction
In aquatic ecosystem, the submerged surfaces are inhabited with a wide range of living organisms from bacteria to invertebrates [1]. Bio fouling is undesired growth and accumulation of microbes, plants and animals to a surface of natural or any artificial structures which are long time exposed with water. It is yet one of the major unsolved problems currently affecting the shipping industry. To solve this consisting problem, Nanoparticles were applied for coating the ships and the other artificial structures within the ocean. However, to decrease the side effect and the gradual poisoning of chemical derived Nanoparticles, the present generation focused on the biosynthesized Nanoparticles for coating and try to solve of this consisting problem of accumulation of living organisms.
For its special characteristics, Nanoparticles are used for various field of application. In general, Gold, Silver and Platinum, the noble metals Nanoparticles are widely applied to different field such as preparation of toothpaste, various biomedical applications and pharmaceutical applications. In India and China, it had been reported that gold (red colloidal) had revitalization medicinal applications similarly; gold Nanoparticles had drug delivery and diagnostic applications. There are many applications of Nanoparticles in various fields. This review focused biosynthesis of Nanoparticles and its applications to bio fouling and dye degradation.
Biosynthesis of Nanoparticles by Marine Plants
Biosynthesis of Gold Nanoparticles
The biosynthesis of gold Nanoparticles is done by single step reduction of aqueous chloroaurate ions by Fucus spiralis. The biosynthesized gold Nanoparticles are varied in shapes and ranges from 5-40 nm in size [2]. This study also reveals that the shape and sizes of biosynthesis gold Nanoparticles depends on pH values, time of reduction and also the rate of coagulation by crystal growth [2]. The Single cell protein (Spirullina platensis) uses for biosynthesized of Silver (7-16 nm), gold (6-10 nm) and bimetallic (17-25 nm) Nanoparticles which demonstrate that the biosynthesis and size of Nanoparticles depends on temperature and duration of reduction [3]. The CdS Nanocrystallites are biosynthesized by the Cd presence in phytoplankton Phaeodactylum tricornutum. The aqueous solution of Sargassum wightii applied to extracellular biosynthesis of gold Nanoparticles which are mono-disperse and specific in shape [3]. The fucoidans, o-fucoidan from Cladosiphon okamuranus and t-fucoidan from Kjellamaniella crassifolia use for to biosynthesize the gold Nanoparticles. Both synthesize spherical and 8-10 nm sizes Nanoparticles but the o-fucoidan synthesis well mono-disperse linear polymer and t-fucoidan synthesize less disperse branched polymer [4]. The extracellular polysaccharides of dried Sargassum wightii synthesize gold Nanoparticles [3]. Similar study shows that the biosynthesis, stability of biosynthesized Nanoparticles, shape and sizes of gold Nanoparticles by Sargassum wightii also depend on temperature, pH and duration of reduction. The gold Nanoparticles fabrication changes with change of nitrate reductase, pH and temperature [5]. The various shapes such as square, rectangle and triangle and 60nm size gold Nanoparticles synthesize from brown seaweed Turbinaria conoides and its inhibits growth of Streptococcus sp., Bacillus subtilis and Klebsiella pneumoniae [6]. The aqueous extract of Dictyota bartayresiana synthesizes gold Nanoparticles of 548-564 nm which confirm the presence of amine, poly phenol and carboxylic group. It has inhibitory effect against Fusarium dimerum and Humicola insulans better than commercial antifungal drugs. The 53-67 nm metallic gold Nanoparticles synthesize with the aqueous extract of Padina gymnospora [7].
Biosynthesis of Silver Nanoparticles
The biosynthesized Silver Nanoparticles from Hypnea musciformis water extract had antibacterial and antifungal activity [8]. Kumar reported that Sargassum tenerrimum biosynthesized Silver Nanoparticles had human MTCC pathogenic inhibitory activity [9]. The biosynthesized Silver Nanoparticles from Gelidiella acerosa reportedly had antifungal activity rather than Clotrimazole [10]. The biosynthesized Silver Nanoparticles of Ulva lactuca reportedly had antimicrobial activity [11]. The interesting biosynthesis of Silver Nanoparticles is done by the metals silver ions 63.7% to 56.0% including Codium capitatum water extract. In this synthesis no chemical solution use, so it is completely eco-friendly [12]. The 96nm size spherical Silver Nanoparticles are biosynthesized by Turbinaria conoides aqueous extract and these biosynthesized Silver Nanoparticles are highly toxic to the growth of some MTCC human pathogenic bacteria such as Bacillus subtilis (MTCC3053), and Klebsiella planticola (MTCC2277) [13]. The 14nm spherical Silver Nanoparticles synthesizes by Padina tetrastromatica which also have antimicrobial activity [14]. The methanolic extract of Sargassum polycystum biosynthesizes 5-7 nm Silver Nanoparticles which active inhibitory potential against some human pathogens. The biosynthesized spherical, polydispersed Silver Nanoparticles and fatty acids extract of Padina tetrastromatica had anti-cancer activity against breast cancer cell line MCF [15,16]. Shiny reportedly explained the spherical 25-40 nm Silver Nanoparticles of Padina gymnospora antibacterial and also medical wound dressing in hospital [17].
The spherical 25-40 nm silver Nanoparticles synthesize by Padina gymnospora has inhibitory activity against Bacillus cereus and Escherichia coli which has its medicinal application for wound dressing in hospital [17]. Some seaweed Caulerpa pelteta (green), Hypnea Valencia (red) and Sargassum mariocystum (brown) biosynthesizes various shapes such as spherical, triangle, rectangle, radial and spheres 96-110 nm Zinc Nanoparticles of at pH 8 and temperature 80°C. The biosynthesized Zinc Nanoparticles contains reactive oxygen species which shows antibacterial activity against the pathogens Streptococcus mutans, Vibrio cholerae, M. luteus, Klebsiella pneumoniae and Neisseria gonorrohea [18]. The biosynthesized Silver Nano material from the aqueous extract of Sargassum longifoliums, brown seaweed have antifungal activity against Candida albicans, Aspergillus fumigatus and Fusarium sp. S. longifolium, it may be due to the bio-component present on it, similarly due to its Nano size and spherical shape [19]. The Nano-size materials have increase surface area, so that area protect the fungal growth [20]. The positively charged silver Nano-materials attach with the present negatively charged particles within the fungal growth area by electrostatic attraction which may inhibits fungal growth [21]. Positively charged silver ions may attach with negatively charged cell membranes of microbes by electrostatic attraction [21]. Due to smaller size, Silver nanoparticles have high permeability and create proton leakage which helps to transfer the ROS through membrane [20,22,23]. The conidial fungal germination inhibits by Silver nanoparticles, reasonably have potential to inhibit spore producing fungus [24]. The insulin deficiency develops clinical syndrome diabetes. The silver nanoparticles biosynthesizes by Colpomenia sinuosa have antidiabetic potential which inhibits the a-glucosidase and a-amylase enzymes production which is responsible for diabetes production [25]. The 34-80 nm colloidal silver nanoparticle synthesizes by Halymenia poryphyroides have great efficacy against Salmonella typhi, Klebsiella pneumoniae, Staphylococcus aureus, Proteus vulgaris and Salmonella typhi [26]. The cubical shape 18-90 nm and 20-90 nm biosynthesized Silver nanoparticles have aqueous extracts of Turbinaria ornata and Padina tetrastromatica have antimicrobial and antifungal activity. The Nanoparticles have carbonyl groups, aromatic alcohols, amines and hydroxyl groups [27].
Application of Gold and Silver Nanoparticles in Various Fields
The low resistance gold Nanoparticles uses for flexible electronics, the gold Nano-wires use for electronic devices, and the gold Nano-particulate apply for flexible electronics ink; Nano rod which will be useful in electronic devices and it also uses the rapid biomedical assays. The gold-silica Nano-shells destroy cancer cells; the gold Nanoparticles improve decorative coatings using thiol, the thermosetting gold Nanoparticles exhibits novel aesthetic effects, the gold Nanoparticles use for pollution control and also synthesis of some chemicals [2]. Due to special chemical reactivity and unique physical properties, Nanoparticles uses for drug delivery, antibacterial and viral agent, genetic disorder detection, bio-sensing, labelling of biological applications, and sequencing of DNA and gene therapy. The brown seaweed extracted polysaccharides used as anti-peptic-ulcer, anti-coagulant, anti-inflammation, anti-aging compound, anti-cancer, whitening agent and anti-viral agent [28].
Silver Nanoparticles exhibit tremendous applications in drug delivery [29], wound healing [30], sensor applications [31-33] cosmetics [34], textile industry and also used antimicrobial agent in paint [35]. Silver Nanoparticles were actively involved in the medical sciences due to their antimicrobial actions in food pathogens such as Staphylococcus aureus and Escherichia coli, Klebsiella mobilis, Bacillus subtilis, Klebsiella pneumoniae, Pseudomonas aeruginosa [36-38], meningitis causative microbe Cryptococcus neoformans [28], methicillin-resistant Staphylococcus aureus, methicillin-resistant Staphylococcus epidermidis, Streptococcus pyogenes, and Salmonella typhi and having good antifungal activities against Candida albicans, Aspergillus niger, Penicillium citrium and Aureobasidium pullulans were isolated from waste suspension of kitchen drainage synthesis [34]. The gold, silver and platinum noble metal Nanoparticles used for toothpaste preparation, it also used for pharmaceutical and medicine preparation. The eco-friendly spherical shaped (15nm) Silver Nanoparticles biosynthesized from Rhizophora apiculata had high antibacterial activity in compare to gentamicin and chloramphenical [39]. Research showed that gold Nanoparticles useful for breast cancer treatment [40]. The gold Nanoparticles from red seaweed Corallina officinalis have cytotoxic effect on MCF-7 breast cancer [41].
Application as Anti-foulants
The biosynthesized gold Nanoparticles has anti-bioflim activity against the common marine bioflim forming bacteria such as A. hydrophila, Salmonella sp. and S. liquefaciens [42]. The crude extracts of seaweeds such as Sarconema furcellatum, Sargassum wightii and sea grass Syringodium isoetifolium, Cymodocea serrulata have antimicrofouling activity against the microfoulers such as 7±0.16 to 13±0.26 mm antibacterial activity, 50-300 μg/ml anti-microalgal, LC50 133.88μg/ml; P‹0.001 Artemia cytotoxicity and anti-crustacean activity; the mortality of micro-fouler increase with increasing of the concentration of crude seaweeds extract [43]. Due to presence some important functional groups such as aliphatic (fatty acid), amide I and II (NH2), amino, phosphoryl, hydroxyl and carbonyl, the mangrove Rhizophora apiculata, Rhizophora mucronata and Avicennia marina extract shows higher antifouling activity against some fouling bacteria such as Bacillus sp., Flavobacterium sp., Cytophaga sp. and Pseudomonas sp. than seaweeds extract Halimeda macroloba, Ulva reticulate and Sargassum wightii, similarly the sea grass extract Halodule pinifolia, Cymodocea serrulata also shows lowest anti-foulants activity than mangrove extract [44]. The chemical constituents and the anti-feedant, antibacterial, and antilarval activities of the South China Sea grass Enhalus acoroides. Eleven pure compounds are including four flavonoids and five steroids were obtained. Among these compounds, three flavonoids were anti-feedant against second-instar larvae of Spodoptera litura, two flavonoids had antibacterial activity towards several marine bacteria, and one flavonoid showed strong anti-larval activity against Bugula neritina larvae [45]. The Ulva fasciata crude ethyl acetate extract mediated biosynthesized crystalline, spherical, poly-dispersed 28-41 nm size range Silver Nanoparticles had inhibitory activity14.00±0.58 mm against Xanthomonas campestris pv. malvacearum [46].
Application of Nanoparticles in Dye Degradation
The Padina tetrastromatica, leaf extract was used for biosynthesis of Silver Nanoparticles which degrade the direct brown 95 and Congo red dye which is eco-friendly and less expensive method. It used in water purification and it has photo catalytic activity [47-54] (Table 1).
S.No.
Name of seaweed
Nanoparticles
1.
Sargassum wightii
Gold & Silver
2.
Sargassum longifolium
Silver
3.
Sargassum muticum
Magnetic Iron Oxide (Fe3O4)
3.
Stoechospermum marginatum
Gold
4.
Sargassum tenerrimum
Silver
5.
Padina tetrastromatica
Silver
6.
(E. coli, Pseudomonas sp.), Cyanobacteria (Spirulina platensis, Oscillatoria willei, Phormidium tenue)
Inorganic Nanoparticles
7.
Algae (Navicula atomus, Diadesmis gallica, Stauroneis sp. Sargassum wightii, Fucus vesiculosus)
Inorganic Nanoparticles
8.
Mangroves (Rhizophora mucronata, Xylocarpus mekongensis), salt marshes (Sesuvium portulacastrum and Suaeda sp.) and sand dune (Citrullus colocynthis)
Inorganic Nanoparticles
9.
Sargassum plagiophyllum
Silver chloride Nanoparticles
10.
Sargassum myriocystum
Gold
11.
Ulva lactuca
Silver
12.
Codium capitatum
Silver
13.
Turbinaria conoides
Gold
14.
blue green alga Spirulina platensis
Gold
15.
Padina tetrastromatica
Silver
16.
Avicennia marina
Silver
17.
Gelidiella sp.
Silver
18.
Chaetomorpha linum
Silver
19.
Acanthophora spicifera
Silver
20.
Kappaphycus alvarezii
Silver
21.
Gracilaria corticata
Silver
22.
Sargassum polycystum
Silver
23.
Corallina officinalis
Gold
24.
Sargassum muticum
Silver
25.
Dictyota bartayresiana
Silver
26.
Sargassum polyphyllum
Silver
27.
Caulerpa racemosa
Silver
28.
Ulva flexuosa
Silver
29.
Sargassum cinereum
Silver
30.
Halymenia porphyroides
Silver
31.
Gracilaria corticata
Silver
32.
Enteromorpha flexuosa
Silver
33.
Pterocladiella capillacea
Silver
34.
Amphora sp.
Silver
35.
(Padina tetrastromatica and Turbinaria ornata)
Gold
36.
Hypnea musciformis
Silver
37.
Sargassum polycystum
Silver
38.
Colpomenia sinuosa
Silver
39.
Algae(Shewanella)
Gold
40.
Gracilaria dura
Silver nanocoposite and Nanoparticles
41.
Cladosiphon okamuranus & Kjellamaniella crassifolia
Gold
42.
Chaetomorpha linum
Silver
43.
Gracilaria corticata
Silver
44.
Laminaria japonica
Gold
45.
Corallina officinalis
Gold
46.
Chlorella vulgaris
Gold
47.
Laminaria Japonica
Gold
48.
Sargassum plagiophyllum.
Silver chloride Nanoparticles
49.
Corallina officinalis
Gold
50.
Gelidiella acerosa
Silver
51.
Gelidiella acerosa
Silver
52.
Ecklonia cava
Gold
53.
Gracilaria verrucosa
Gold
54.
Colpomenia sinuosa
Silver
55.
Gracilaria corticata
Silver
56.
Hypnea musciformis
Silver
57.
Pterocladiella capillacea
Silver
58.
Silver
59.
Gracilaria edulis
Metallic Silver and Zinc oxide Nanoparticles
60.
Ulva reticulata
Silver
61.
Sargassum swartzii
Gold
62.
Prasiola crispa
Gold
63.
Galaxaura elongata
Gold
64.
Padina pavonica
Silver
65.
Lemanea fluviatilis
Gold
66.
Halymenia poryphyroides
Silver
67.
Ulva fasciata
Silver
68.
Microalga Scenedesmus sp.
Silver
Table 1: List of Seaweeds, which utilized for Nanoparticles synthesis.
Future Prospects
Smaller the size of Nanoparticles, the efficiency of activity and the stability is more than the other, so this review aim is to survey the green originated Nanoparticles until yet, so in future that can be used in the applied field for numerous purposes. Research is a continuous process and researchers in various fields are everyday contributing more significant solution to solve the leading problem.
Acknowledgement
Author is thankful to Department of Science and Technology for their support. Author thanks to Dr. P. Anantharaman, Associate professor for support. Author thanks to Dean & Director, C.A.S in Marine Biology, Faculty of Marine Sciences, Annamalai University and all the dignified higher authorities of Annamalai University.
Conflict of Interest
There are no conflicts of interest to be declared.
Funding
Author is thankful to Department of Science and Technology, Govt. of India, for their financial support and co-operation.
References
- Anima N, Saravanan M. Biosynthesis of Silver Nanoparticles from Staphylococcus aureus and its antimicrobial activity against MRSA and MRSE. Nanomedicine: Nanotechnology, Biology, and Medicine. 2009; 5: 452-456.
- Torres E, Blázquez ML, Mata YN, Ballester A, González F, Muñoz JA. Gold Nanoparticles formation by seaweed biomass: influence of ph. 2nd Nano Spain Workshop. 2005; 14-17.
- Govindaraju K, Basha SK, Kumar VG, Singaravelu G. Silver, Gold & bio metallic Nanoparticles production using Single –Cell protein (Spirullina platensis) Geitter. J Mater Sci. 2008; 43: 5112-5122.
- Soisuwan S, Warisnoicharoen W, Lirdprapamongkol K, Svasti J. Eco-Friendly Synthesis of Fucoidan-Stabilized Gold Nanoparticles. American Journal of Applied Sciences. 2010; 7: 1038-1042.
- Oza G, Pandey S, Shah R, Sharon M. A Mechanistic approach for biological fabrication of crystalline gold Nanoparticles using marine algae, Sargassum wightii. European Journal of Experimental Biology. 2012; 2: 505-512.
- Rajesh kumar S, Malarkodi C, Vanaja M, Gnanajobitha G, Paul kumar K, C Kannan C, et al. Antibacterial activity of algae mediated synthesis of gold Nanoparticles from Turbinaria conoides. Der Pharma Chemica. 2013; 5: 224- 229.
- Singh M, Kalaivani R, Manikandan S, Sangeetha N, Kumaraguru AK. Facile green synthesis of variables metallic gold nanoparticle using Padina gymnospora, a brown marine, macro alga. Appl Nano Science. 2013; 3: 145- 151.
- Saraniya Devi J, Valentin Bhimba B. Antibacterial and Antifungal Activity of Silver Nanoparticles Synthesized using Hypnea musciformis. Biosciences Biotechnology Research Asia. 2014; 11: 235-238.
- Kumar P, Selvi SS, Prabha AL, Kumar KP, kumar RSG, Govindaraju M. Synthesis of silver Nanoparticles from Sargassum tenerrimum and screening photochemical for its anti-bacterial activity. Nano Biomed Eng. 2012; 4: 12- 16.
- Vivek M, kumar PS, Steffi S, Sudha S. Biogenic Silver Nanoparticles by Gelidiella acerosa Extract and their Antifungal Effects. 2011.
- Raja SB, Suriya J, Sekar V, Rajasekaran R. Biomimetic of silver Nanoparticles by Ulva lactuca seaweed and evaluation of its antibacterial activity. Int J Pharm Sci. 2012; 4: 139-143.
- Kannan RRR, Stirk WA, Staden JV. Synthesis of silver Nanoparticles using the seaweed Codium capitatum P.C. Silva (Chlorophyceae). 2013.
- Rajesh Kumar S, Kannan C, Annadurai G. Synthesis and Characterization of Antimicrobial Silver Nanoparticles Using Marine Brown Seaweed Padina tetrastromatica. Drug Invention Today. 2012; 4: 511-513.
- Rajesh kumar S, Kannan C, Annadurai G. Green synthesis of Silver Nanoparticles using marine brown algae Turbinaria conoides and its antibacterial activity. Int J Pharm Bio Sci. 2012; 3: 502-510.
- Thangaraju N, Prasanna R, Chinnasamy VA, Kannaiyan P. Synthesis of silver Nanoparticles and the antibacterial and anticancer activities of the crude extract of Sargassum polycystum C. Agardh. Nano Biomed Eng. 2012; 4: 89-94.
- Jegadeeswaran P, Rajiv P, Shiva raj R, Venckatesha R. Photo catalytic degradation of dye using brown seaweed (Padina tetrastromatica) mediated silver Nanoparticles. J Biosci Res. 2012; 3: 229-233.
- Shiny PJ, Mukherjee A, Chandrasekaran N. Marine Algae mediated synthesis of the Silver Nanoparticles and its antibacterial efficiency. International Journal of Pharmacy and Pharmaceutical Sciences. 2013; 5: 239-241.
- Nagarajan S, Kuppusamy KA. Extracellular Synthesis of Zinc Oxide Nanoparticles synthesis from Seaweeds of Gulf of Mannar, India. Journal of Nanobiotechnology. 2013; 11: 39.
- Rajesh kumar S, Malarkodi C, Paulkumar K, Vanaja M, Gnanajobitha G, Annadurai G. Algae Mediated Green Fabrication of Silver Nanoparticles and Examination of Its Antifungal Activity against Clinical Pathogens. International Journal of Metals. 2014.
- Pal S, Tak YK, Song JM. Does the antibacterial activity of silver Nanoparticles depend on the shape of the Nanoparticles? A study of the gram-negative bacterium Escherichia coli. Applied and Environmental Microbiology. 2007; 73: 1712-1720.
- Sondi, Salopek-Sondi B. Silver Nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram negative bacteria. Journal of Colloid and Interface Science. 2004; 275: 177-182.
- Dibrov P, Dzioba J, Gosink KK, Hase CC. Chemiosmotic mechanism of antimicrobial activity of Ag+ in Vibrio cholera. Antimicrobial Agents and Chemotherapy. 2002; 46: 2668–2670.
- Dehkordi SH, Hosseinpour F, Kahrizangi AE. An in vitro evaluation of antibacterial effect of silver Nanoparticles on Staphylococcus aureus isolated from bovine subclinical mastitis. African Journal of Biotechnology. 2011; 10: 10795-10797.
- Kim SW, Kim KS, Lamsal K, Kim YJ, Kim SB, Jung M, et al. An in vitro study of the antifungal effect of silver Nanoparticles on oak wilt pathogen Raffaelea sp. Journal of Microbiology and Biotechnology. 2009; 19: 760-764.
- Vishnu Kiran M, Murugesan S. Biological synthesis of silver Nanoparticles from marine alga Colpomenia sinuosa and its in vitro anti-diabetic activity. AJBBL. 2014; 3.
- Kiran MV, Murugesen S. Bio-synthesis of silver nano particles from marine alga Halymenia poryphyroides and its antibacterial efficacy. Int J Curr Microbiol App Sci. 2014; 3: 96-103.
- Kayalvizhi K, Asmathunisha N, Subramanian V, Kathiresan K. Purification of silver and gold Nanoparticles from two species of brown seaweeds (Padina tetrastromatica and Turbinaria ornata). Journal of Medicinal Plants Studies. 2014; 2: 32-37.
- Wang H, Xu K, Liu L, Tan JP, Chen Y, Li Y, et al. The efficacy of selfassembled cationic antimicrobial peptide Nanoparticles against Cryptococcus neoformans for the treatment of meningitis. Biomaterials. 2010; 31: 2874- 2881.
- Vaidyanathan R, Kalishwaralal K, Gopalram S, Gurunathan S. Nanosilver- The burgeoning therapeutic molecule and its green synthesis. Biotechnology Advances. 2009; 27: 924-937.
- Maneerung T, Tokura S, Rujiravanit R. Impregnation of silver Nanoparticles into bacterial cellulose for antimicrobial wound dressing. Carbohydrate Polymers. 2008; 72: 43-51.
- Smitha SL, Nissamudeen KM, Philip D, Gopchandran KG. Studies on surface Plasmon resonance and photoluminescence silver Nanoparticles. Spectrochim. Acta A. 2008; 71: 186-190.
- Kalimuthu K, Babu RS, Venkataraman D, Bilal M, Gurunathan S. Biosynthesis of silver nano-crystals by Bacillus licheniformis, Colloid Surf B. 2008; 65: 150- 153.
- Kowshik M, Ashtaputre S, Kharazi S, Vogel W, Urban J, Kulkarni SK, et al. Extracellular synthesis of silver Nanoparticles by a silver-tolerant yeast strain MKY3, Nanotechnology. 2003; 14: 95-100.
- Kokura S, Handa D, Takagi T, Ishikawa T, Naito Y, Yoshikawa T. Silver Nanoparticles as a safe preservative for use in cosmetics, Nano - medicine. 2010; 6: 570-574.
- Kumar A, Vemula PK, Ajayan PM, John G. Silver-Nanoparticles embedded antimicrobial paints based on vegetable oil, Nat. Mater. 2008; 7: 236-241.
- Kyung HC, Park JE, Osaka T, Park SG. The study of antimicrobial activity and preservative effects of nano silver ingredient. Electrochimica Acta. 2005; 51: 956-960.
- Zhang Y, Peng H, Huang W, Zhou Y, Yan D. Facile preparation and characterization of highly antimicrobial colloid Ag or Au Nanoparticles, Journal of Colloid and Interface Science. 2008; 325: 371-376.
- Won KS, Youk HJ, Park WH. Antimicrobial cellulose acetate nano fibers containing Silver Nanoparticles, Carbohydrate Polymers. 2006; 6: 430-434.
- Dhas SP, Mukherjee A, Chandrasekaran N. Synergistic effect of Biogenic Silver Nano-colloid in combination with antibiotics: A potent therapeutic agent. International Journal of Pharmacy and Pharmaceutical Sciences. 2013; 5.
- Selim ME, Hendi AA. Gold Nanoparticles induce apoptosis in MCF-7 human breast cancer cells. Asian Pac J Cancer Prev. 2012; 13: 1617-1620.
- El-Kassas HY, El-Sheekh MM. Cytotoxic Activity of Biosynthesized Gold Nanoparticles with an Extract of the Red Seaweed Corallina officinalis on the MCF-7 Human Breast Cancer Cell Line. Asian Pac. J. Cancer Prev. 2008; 15: 4311-4317.
- Vijayan SR, Santhiyagu P, Singamuthu M, Ahila NK, Jayaraman R, Ethiraj K. Synthesis and Characterization of Silver and Gold Nanoparticles Using Aqueous Extract of Seaweed, Turbinaria conoides, and Their Antimicrofouling Activity. Scientific World Journal. 2014.
- Prakash S, Ahila NK, Ramkumar V, Ravindran J, Kannapiran E. Antimicrofouling properties of chosen marine plants: An eco-friendly approach to restrain marine microfoulers. 2012.
- Prabhakaran SR, Rajaram R, Balasubramanian V, Mathivanan K. Antifouling potentials of extracts from seaweeds, sea grasses and mangroves against primary bioflim forming bacteria. Asian Pacific Journal of Tropical Biomedicine. 2012; S316-S322.
- Qi SH, Zhang S, Qian YP, Bin-Gui Wang. Anti-feedant, antibacterial, and anti larval compound from the South China Sea grass Enhalus acoroides. Botanica Marina. 2008.
- Rajesh S, Patric Raja D, Rathi JM, Sahayaraj K. Biosynthesis of silver Nanoparticles using Ulva fasciata (Delile) ethyl acetate extract and its activity against Xanthomonas campestris pv. malvacearum. J Biopest. 2012; 5: 119- 128.
- Jegadeeswaran P, Shivaraj R, Venckatesha R. Green Synthesis of Silver Nanoparticles from extract of Padina tetrastromatica leaf. Digest Journal of Nanomaterials and Bio structures. 2012; 7: 991-998.
- Chakraborty N, Banerjee A, Lahiri S, Panda A, Ghosh AN, Pal R. ‘Bio recovery of Gold using Cyanobacteria and a eukaryotic alga with special reference to nanogold - a novel phenomenon’ ‘J. Appl. Phyco: 2009; 21: 145-152.
- Jena J, Pradhan N, Dash BP, Panda PK, Mishra BK. Pigment mediated biogenic synthesis of silver Nanoparticles using diatom Amphora sp. and its antimicrobial activity. Journal of Saudi Chemical Society. 2014.
- Raffi M, Hussain F, Bhatti TM, Akhter JI, Hameed A, Hasan MM. “Antibacterial characterization of silver Nanoparticles against E. coli ATCC-15224,” Journal of Materials Science and Technology. 2008; 24: 192-196.
- Mahdavi M, Ahmad MB, Haron MJ, Nadi NB, Rahman MZA, Amin J. Synthesis, Surface Modification and Characterisation of Biocompatible Magnetic Iron Oxide Nanoparticles for Biomedical Applications. Molecules. 2013; 18: 7533-7548.
- Mingyuan G, Rong J, Fang X, Zhang A, Zhou C. Scalable preparation of porous Silicon Nanoparticles and their application for lithium - ion battery anodes. 2013; 6: 174-181.
- Rao PPS, Rao S, Karmarkar SM. Antibacterial activity from Indian species of Sargassum. Bot Mar. 1988; 31: 295-298.
- Varun S, Sudha S, Senthil Kumar P. Biosynthesis of Gold Nanoparticles from aqueous extract of Dictyota bartayresiana and their antifungal activity. Indian Journal of Advances in Chemical Science. 2014; 2: 190-193.