151
|
Molaei R, Farhadi K, Forough M, Pourhossein A. Biosynthetic Route for the Preparation of Nonregular Gold Nanoparticles Using Aqueous Extracted of Nettle (Urtica dioica L.) Plant. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/15533174.2013.862823] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Rahim Molaei
- Department of Chemistry, Faculty of Science, Urmia University, Urmia, I. R. Iran
| | - Khalil Farhadi
- Department of Chemistry, Faculty of Science, Urmia University, Urmia, I. R. Iran
| | - Mehrdad Forough
- Department of Chemistry, Faculty of Science, Urmia University, Urmia, I. R. Iran
| | - Atefeh Pourhossein
- Department of Chemistry, Faculty of Science, Urmia University, Urmia, I. R. Iran
| |
Collapse
|
152
|
Dauthal P, Mukhopadhyay M. Biofabrication, characterization, and possible bio-reduction mechanism of platinum nanoparticles mediated by agro-industrial waste and their catalytic activity. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.07.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
153
|
Yarramala DS, Doshi S, Rao CP. Green synthesis, characterization and anticancer activity of luminescent gold nanoparticles capped with apo-α-lactalbumin. RSC Adv 2015. [DOI: 10.1039/c5ra03857j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A green synthesis was developed to prepare protein coated gold nanoparticles (NPs) where apo-α-lactalbumin was used as reducing and stabilizing agent. The NPs are luminescent and non-toxic to normal cells but more toxic to MCF-7 cells over HeLa.
Collapse
Affiliation(s)
- Deepthi S. Yarramala
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400 076
- India
| | - Sejal Doshi
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400 076
- India
| | - Chebrolu P. Rao
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai – 400 076
- India
| |
Collapse
|
154
|
Biosynthesized silver nanoparticles as a nanoweapon against phytopathogens: exploring their scope and potential in agriculture. Appl Microbiol Biotechnol 2014; 99:1097-107. [PMID: 25547832 DOI: 10.1007/s00253-014-6296-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 12/02/2014] [Accepted: 12/04/2014] [Indexed: 02/01/2023]
Abstract
The beneficial use of silver nanoparticles (AgNPs) in agroecosystems is not fully explored with partial information available, of which most of the studies are limited to laboratory conditions and only few involve natural ecosystems. AgNPs, being the most popular metallic nanoparticles exhibiting antimicrobial property, are predominantly used for plant disease management. Owing to the ill hazards of chemically synthesized AgNPs, their biosynthesis using environment-friendly biomolecules is gaining noteworthy attention. In addition, considering the advantages of nanoformulations over biopesticides, there is no doubt that biosynthesized AgNP-based biopesticides could revolutionize the agricultural sector in the future. Though enhanced commercial use of AgNPs has generated biosafety issues in modern scenario but expecting their significant contribution towards agricultural sector, it is too early to predict the risk factor associated with their usage. To unveil the toxicity factor of AgNPs, we need to focus and understand the major interactions of AgNPs in agroecosytems. Hence, the present review highlights (i) the potential application of AgNPs in the agricultural sector particularly for plant disease management, (ii) significance of biosynthesized AgNPs using microbes and plants over their chemical synthesis, (iii) major interactions of AgNPs in agroecosystems (with soil, soil biota, and plants) with emphasis to deal with toxicity-determining factors, and (iv) identifying future research work holding promising applications of biosynthesized AgNPs in agroecosystems.
Collapse
|
155
|
Khalil MM, Ismail EH, El-Baghdady KZ, Mohamed D. Green synthesis of silver nanoparticles using olive leaf extract and its antibacterial activity. ARAB J CHEM 2014. [DOI: 10.1016/j.arabjc.2013.04.007] [Citation(s) in RCA: 259] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
156
|
Pushpavanam K, Santra S, Rege K. Biotemplating plasmonic nanoparticles using intact microfluidic vasculature of leaves. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14095-14103. [PMID: 25363517 DOI: 10.1021/la5041568] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Leaves are an abundant natural resource, and consist of a sophisticated microfluidic network of veins that transport nutrients and water, thereby enabling photosynthesis. Here, we simultaneously exploit the microfluidics as well as chemistry of processed leaf vasculature (venation) in order to template the in situ generation of plasmonic metal (gold and silver) nanoparticles under ambient conditions. This biotemplating approach involves capillary flow of metal salts through skeleton leaf vasculature, and does not require additional reducing agents for plasmonic nanoparticle formation. Gold nanoparticles, 30-40 nm in diameter, and silver nanoparticles, approximately 9 nm in diameter, were formed within the intact leaf vasculature using this method. Absorption spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron diffraction analyses were employed to ascertain the formation of nanoparticles in the leaf veins. Fourier transform infrared (FT-IR) spectroscopy was employed in order to obtain insights into functional groups responsible for formation of the plasmonic nanoparticles within the leaves. Gold nanoparticles, templated within leaves, demonstrated excellent catalytic properties, thereby imparting catalytic and plasmonic properties to the leaf itself. Furthermore, nanoparticles can be recovered from the leaves as soluble dispersions by simply combusting the organic leaf matter. Taken together, this is a simple yet powerful biotemplating approach for the generation of plasmonic nanoparticles and formation of biotic-abiotic structures for diverse, low-cost applications in sensing, catalysis, and medicine.
Collapse
Affiliation(s)
- Karthik Pushpavanam
- Chemical Engineering, Arizona State University , Tempe, Arizona 85287-6106, United States
| | | | | |
Collapse
|
157
|
Venkatesan B, Subramanian V, Tumala A, Vellaichamy E. Rapid synthesis of biocompatible silver nanoparticles using aqueous extract of Rosa damascena petals and evaluation of their anticancer activity. ASIAN PAC J TROP MED 2014; 7S1:S294-300. [PMID: 25312140 DOI: 10.1016/s1995-7645(14)60249-2] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 05/27/2014] [Accepted: 06/13/2014] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE To optimize the process parameters involved in the green synthesis of silver nanoparticles (G-SNPs) by aqueous extract of Rosa damascena petals and to evaluate the biocompatibility and anti cancer activity of the synthesized silver nanoparticles against human lung adenocarcinoma (A549). METHODS The process variables that include concentration of extract, mixing ratio of reactants, silver salt concentration and interaction time were analyzed. The compatibility of the G-SNPs was verified by incubating with erythrocytes and the anticancer property of the G-SNPs against A549 cells was performed by MTT assay. RESULTS Formation of G-SNPs was confirmed by the visual change in the colour of the reaction mixture from pale yellow to brown yellow. Surface plasmon resonance of synthesized G-SNPs was observed at 420 nm; the size of G-SNPs were analyzed by DLS and found to be in the range of (84.00±10.08) nm. Field emission scanning electron microscope and high resolution transmission electron microscopy analysis confirmed that the G-SNPs were fairly spherical. Fourier transform infrared spectroscopy spectroscopy and X-ray diffraction revealed the characteristic peaks of G-SNPs. Energy dispersive X-ray analysis showed a signal of silver around 3 keV. The synthesized G-SNPs exhibited anticancer activity as evidenced by the MTT assay. IC50 value of G-SNPs was found to be 80 μg/mL. CONCLUSION The results of the present study suggest that G-SNPs can be synthesized rapidly within first minute of the reaction; they are biocompatible and possess anticancer activity against human lung adenocarcinoma.
Collapse
Affiliation(s)
- Balaji Venkatesan
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 025, India
| | - Vimala Subramanian
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 025, India
| | - Anusha Tumala
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 025, India
| | - Elangovan Vellaichamy
- Department of Biochemistry, University of Madras, Guindy Campus, Chennai-600 025, India.
| |
Collapse
|
158
|
Velmurugan P, Anbalagan K, Manosathyadevan M, Lee KJ, Cho M, Lee SM, Park JH, Oh SG, Bang KS, Oh BT. Green synthesis of silver and gold nanoparticles using Zingiber officinale root extract and antibacterial activity of silver nanoparticles against food pathogens. Bioprocess Biosyst Eng 2014; 37:1935-43. [PMID: 24668029 DOI: 10.1007/s00449-014-1169-6] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Accepted: 03/06/2014] [Indexed: 11/28/2022]
Abstract
In the present study, we synthesized silver and gold nanoparticles with a particle size of 10-20 nm, using Zingiber officinale root extract as a reducing and capping agent. Chloroauric acid (HAuCl4) and silver nitrate (AgNO3) were mixed with Z. officinale root extract for the production of silver (AgNPs) and gold nanoparticles (AuNPs). The surface plasmon absorbance spectra of AgNPs and AuNPs were observed at 436-531 nm, respectively. Optimum nanoparticle production was achieved at pH 8 and 9, 1 mM metal ion, a reaction temperature 50 °C and reaction time of 150-180 min for AgNPs and AuNPs, respectively. An energy-dispersive X-ray spectroscopy (SEM-EDS) study provides proof for the purity of AgNPs and AuNPs. Transmission electron microscopy images show the diameter of well-dispersed AgNPs (10-20 nm) and AuNPs (5-20 nm). The nanocrystalline phase of Ag and Au with FCC crystal structures have been confirmed by X-ray diffraction analysis. Fourier transform infrared spectroscopy analysis shows the respective peaks for the potential biomolecules in the ginger rhizome extract, which are responsible for the reduction in metal ions and synthesized AgNPs and AuNPs. In addition, the synthesized AgNPs showed a moderate antibacterial activity against bacterial food pathogens.
Collapse
Affiliation(s)
- Palanivel Velmurugan
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk, 570-752, South Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
159
|
Perni S, Hakala V, Prokopovich P. Biogenic synthesis of antimicrobial silver nanoparticles capped with l-cysteine. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.09.034] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
160
|
Ashokkumar S, Ravi S, Kathiravan V, Velmurugan S. Rapid biological synthesis of silver nanoparticles using Leucas martinicensis leaf extract for catalytic and antibacterial activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:11439-11446. [PMID: 24906826 DOI: 10.1007/s11356-014-3012-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Accepted: 05/06/2014] [Indexed: 06/03/2023]
Abstract
A novel green approach for the synthesis and stabilization of silver nanoparticles (AgNPs) using water extract of Leucas martinicensis leaf has been developed. As obtained, the nanoparticles are characterized by UV-visible (UV-Vis), transmission electron microscope (TEM), and X-ray diffraction (XRD). The crystalline nature of the AgNPs is confirmed by the prominent peaks in the XRD pattern. FTIR spectra suggest that the possible biomolecules are responsible for the efficient stabilization of the sample. The effects of leaf quantity on the biosynthesis of AgNPs are investigated by UV-Vis spectrophotometer. The synthesized AgNPs are observed to have a good catalytic activity on the reduction of methylene blue by L. martinicensis leaf. This is confirmed by the decrease in absorbance maximum values of methylene blue with respect to time through UV-Vis spectrophotometer. Moreover, the antibacterial activity of synthesized AgNPs against Staphylococcus aureus, Bacillus subtilis, Salmonella typhi, and Escherichia coli are screened.
Collapse
Affiliation(s)
- S Ashokkumar
- Department of Physics, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu, India
| | | | | | | |
Collapse
|
161
|
Ashok Kumar D, Palanichamy V, Roopan SM. Photocatalytic action of AgCl nanoparticles and its antibacterial activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 138:302-6. [DOI: 10.1016/j.jphotobiol.2014.06.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 06/16/2014] [Accepted: 06/18/2014] [Indexed: 10/25/2022]
|
162
|
Naraginti S, Sivakumar A. Eco-friendly synthesis of silver and gold nanoparticles with enhanced bactericidal activity and study of silver catalyzed reduction of 4-nitrophenol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:357-62. [PMID: 24681320 DOI: 10.1016/j.saa.2014.02.083] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 02/04/2014] [Accepted: 02/19/2014] [Indexed: 05/28/2023]
Abstract
The present study reports a simple and robust method for synthesis of silver and gold nanoparticles using Coleus forskohlii root extract as reducing and stabilizing agent. Stable silver nanoparticles (AgNPs) and gold nanopoarticles (AuNPs) were formed on treatment of an aqueous silver nitrate (AgNO3) and chloroauric acid (HAuCl4) solutions with the root extract. The nanoparticles obtained were characterized by UV-Visible spectroscopy, Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR). UV-Vis and TEM analysis indicate that with higher quantities of root extract, the interaction is enhanced leading to size reduction of spherical metal nanoparticles. XRD confirms face-centered cubic phase and the diffraction peaks can be attributed to (111), (200), (222) and (311) planes for these nanoparticles. These synthesized Ag and Au nanoparticles were found to exhibit excellent bactericidal activity against clinically isolated selected pathogens such as Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus). The synthesized AgNPs were also found to function as an efficient green catalyst in the reduction of anthropogenic pollutant 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride, which was apparent from the periodical color change from bright yellow to colorless, after the addition of AgNPs.
Collapse
Affiliation(s)
| | - A Sivakumar
- Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632 014, India.
| |
Collapse
|
163
|
Solgi M. Evaluation of plant-mediated Silver nanoparticles synthesis and its application in postharvest Physiology of cut Flowers. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2014; 20:279-285. [PMID: 25049454 PMCID: PMC4101138 DOI: 10.1007/s12298-014-0237-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/15/2014] [Accepted: 05/16/2014] [Indexed: 06/03/2023]
Abstract
Today the use of silver nanoparticles is becoming increasingly widespread due to their wide applications as antimicrobial agent. Green synthesis of silver nanoparticles (SNPs) using the petal extract of saffron (Crocus sativus) as a reducing agent from 5 mM AgNO3 has been investigated in this work. Diverse petal extracts quantities and reaction times were used for the synthesis of SNPs. The resulting SNPs were characterized by means of UV-Vis, XRD and FTIR techniques. SNPs were synthesized rapidly within 30 min of incubation period and synthesized SNPs showed an absorption peak at 380-400 nm in the UV-Vis spectrum. XRD spectrum confirmed the formation of metallic silver, too. Green synthesized SNPs were used as antimicrobial agent against three bacterial genera of Bacillus, Pseudomonas and Acinetobacter which contaminate preservative solution of cut-flowers, too. According to the results biosynthesized SNPs using saffron petals successfully controlled these bacteria and have made them promising candidates as new generation of antimicrobials. This route is rapid, simple without any hazardous chemicals and economical to synthesized SNPs.
Collapse
Affiliation(s)
- Mousa Solgi
- Department of Horticultural Engineering, Faculty of Agriculture and Natural Resources Arak University, Arak, 38156-8-8349 Iran
| |
Collapse
|
164
|
Han TH, Khan MM, Lee J, Cho MH. Optimization of positively charged gold nanoparticles synthesized using a stainless-steel mesh and its application for colorimetric hydrogen peroxide detection. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
165
|
Velmurugan P, Cho M, Lee SM, Park JH, Bae S, Oh BT. Antimicrobial fabrication of cotton fabric and leather using green-synthesized nanosilver. Carbohydr Polym 2014; 106:319-25. [DOI: 10.1016/j.carbpol.2014.02.021] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 01/28/2014] [Accepted: 02/05/2014] [Indexed: 11/27/2022]
|
166
|
Vernonia cinerea (L.) Less. silver nanocomposite and its antibacterial activity against a cotton pathogen. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1676-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
167
|
Synthesis, characterization and In vitro cytotoxicity of gold nanoparticles using cultural filtrate of low shear modeled microgravity and normal gravity cultured K. pneumoniae. Macromol Res 2014. [DOI: 10.1007/s13233-014-2072-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
168
|
Rathnayake I, Ismail H, Azahari B, De Silva C, Darsanasiri N. Imparting antimicrobial properties to natural rubber latex foam via green synthesized silver nanoparticles. J Appl Polym Sci 2014. [DOI: 10.1002/app.40155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Indrajith Rathnayake
- School of Materials and Mineral Resources Engineering; University Sains Malaysia; Penang Malaysia
| | - Hanafi Ismail
- School of Materials and Mineral Resources Engineering; University Sains Malaysia; Penang Malaysia
| | - Baharin Azahari
- School of Industrial Technology; University Sains Malaysia; Penang Malaysia
| | - Channa De Silva
- Department of Chemistry and Physics; Western Carolina University; Cullowhee North Carolina 28723
| | - Nalin Darsanasiri
- Department of Chemistry and Physics; Western Carolina University; Cullowhee North Carolina 28723
| |
Collapse
|
169
|
Biosynthesis of gold nanoparticles using Solanum nigrum leaf extract and screening their free radical scavenging and antibacterial properties. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.bionut.2014.03.004] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
170
|
Abstract
Green chemistry has been an eye catching area of interest since the past few years. With the problem of energy crisis looming high and its constraint being particularly vulnerable on the developing economies, the need for giving alternative traditional chemistry a serious consideration as well as adequate room for development has received significant boost through the coveted efforts of multidisciplinary and interdisciplinary scientific fields. Nanoscience has been the right field in this dimension as it opens up the door to multiple opportunities through enabling a number of chemical, biochemical, and biophysical transformations in a significantly easier and reliable manner. The use of nanoparticles has made the fields of catalysis, synthesis, and enzyme immobilizations as well as molecular interactions a lot much easier, rapid and easily controllable. This review article sheds light on the popular alternative synthesis routes being employed for the synthesis of nanoparticles, the pivotal being from microbes, plants, and chemical routes via sonication, microwaving, and many others.
Collapse
|
171
|
Mohan SC, . KS, . TA, . PV, . SK. Green Synthesis, Antimicrobial and Antioxidant Effects of Silver Nanoparticles using Canthium coromandelicum Leaves Extract. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/jm.2014.142.150] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
172
|
Ayala Valencia G, Cristina de Oliveira Vercik L, Ferrari R, Vercik A. Synthesis and characterization of silver nanoparticles using water-soluble starch and its antibacterial activity onStaphylococcus aureus. STARCH-STARKE 2013. [DOI: 10.1002/star.201200252] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Germán Ayala Valencia
- Basic Sciences Department ZAB/FZEA; University of São Paulo, Av. Duque de Caxias Norte 225; Pirassununga SP Brazil
| | | | - Rosana Ferrari
- Departament of Biological Science; Institute of Santa Cruz; Ilhéus Brazil
- Department of Histology and Embriology; Institute of Biology; University of Campinas-UNICAMP; Campinas SP Brazil
| | - Andrés Vercik
- Basic Sciences Department ZAB/FZEA; University of São Paulo, Av. Duque de Caxias Norte 225; Pirassununga SP Brazil
| |
Collapse
|
173
|
Velmurugan P, Iydroose M, Lee SM, Cho M, Park JH, Balachandar V, Oh BT. Synthesis of silver and gold nanoparticles using cashew nut shell liquid and its antibacterial activity against fish pathogens. Indian J Microbiol 2013; 54:196-202. [PMID: 25320422 DOI: 10.1007/s12088-013-0437-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 10/21/2013] [Indexed: 11/26/2022] Open
Abstract
This study reveals a green process for the production of multi-morphological silver (Ag NPs) and gold (Au NPs) nanoparticles, synthesized using an agro-industrial residue cashew nut shell liquid. Aqueous solutions of Ag(+) ions for silver and chloroaurate ions for gold were treated with cashew nut shell extract for the formation of Ag and Au NPs. The nano metallic dispersions were characterized by measuring the surface plasmon absorbance at 440 and 546 nm for Ag and Au NPs. Transmission electron microscopy showed the formation of nanoparticles in the range of 5-20 nm for silver and gold with assorted morphologies such as round, triangular, spherical and irregular. Scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction analyses of the freeze-dried powder confirmed the formation of metallic Ag and Au NPs in crystalline form. Further analysis by Fourier transform infrared spectroscopy provided evidence for the presence of various biomolecules, which might be responsible for the reduction of silver and gold ions. The obtained Ag and Au NPs had significant antibacterial activity, minimum inhibitory concentration and minimum bactericidal concentration on bacteria associated with fish diseases.
Collapse
Affiliation(s)
- Palanivel Velmurugan
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752 South Korea
| | - Mahudunan Iydroose
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641-046 Tamil Nadu India
| | - Sang-Myung Lee
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752 South Korea
| | - Min Cho
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752 South Korea
| | - Jung-Hee Park
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752 South Korea
| | - Vellingiri Balachandar
- Division of Human Genetics, Department of Zoology, Bharathiar University, Coimbatore, 641-046 Tamil Nadu India
| | - Byung-Taek Oh
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752 South Korea
| |
Collapse
|
174
|
Vidhu VK, Philip D. Catalytic degradation of organic dyes using biosynthesized silver nanoparticles. Micron 2013; 56:54-62. [PMID: 24210247 DOI: 10.1016/j.micron.2013.10.006] [Citation(s) in RCA: 235] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 10/10/2013] [Accepted: 10/10/2013] [Indexed: 12/01/2022]
Abstract
The green synthesis of metallic nanoparticles paved the way to improve and protect the environment by decreasing the use of toxic chemicals and eliminating biological risks in biomedical applications. Plant mediated synthesis of metal nanoparticles is gaining more importance owing to its simplicity, rapid rate of synthesis of nanoparticles and eco-friendliness. The present article reports an environmentally benign and unexploited method for the synthesis of silver nanocatalysts using Trigonella foenum-graecum seeds, which is a potential source of phytochemicals. The UV-visible absorption spectra of the silver samples exhibited distinct band centered around 400-440 nm. The major phytochemicals present in the seed extract responsible for the formation of silver nanocatalysts are identified using FTIR spectroscopy. The report emphasizes the effect of the size of silver nanoparticles on the degradation rate of hazardous dyes, methyl orange, methylene blue and eosin Y by NaBH4. The efficiency of silver nanoparticles as a promising candidate for the catalysis of organic dyes by NaBH4 through the electron transfer process is established in the present study.
Collapse
Affiliation(s)
- V K Vidhu
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695 015, India
| | | |
Collapse
|
175
|
Rapid Biosynthesis of Silver Nanoparticles by Exploiting the Reducing Potential of Trapa bispinosa Peel Extract. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/516357] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Present work reports exceptionally high reducing capacity of Trapa bispinosa to synthesize monodispersed silver nanoparticles (SNPs) within 120 seconds at 30°C which is the shortest tenure reported for SNP synthesis using plants. Moreover, we also instigated impact of different pH values on fabrication of SNPs using visible spectroscopy with respect to time. Percentage conversion of Ag+ ions into Ag° was calculated using ICP-AES analysis and was found to be 97% at pH = 7. To investigate the reduction of Ag+ ions to SNPs, cyclic voltammetry (CV) and open circuit potential (OCP) using 0.1 M KNO3 were performed. There was prompt reduction in cathodic and anodic currents after addition of the peel extract which indicates the reducing power of T. bispinosa peel. Stability of the SNPs was studied using flocculation parameter (FP) which was found to be least at all the pH values. FP was found to be indirectly proportional to stability of the nanoparticles.
Collapse
|
176
|
Chen H, Zhen Z, Todd T, Chu PK, Xie J. Nanoparticles for Improving Cancer Diagnosis. MATERIALS SCIENCE & ENGINEERING. R, REPORTS : A REVIEW JOURNAL 2013; 74:35-69. [PMID: 24068857 PMCID: PMC3779646 DOI: 10.1016/j.mser.2013.03.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Despite the progress in developing new therapeutic modalities, cancer remains one of the leading diseases causing human mortality. This is mainly attributed to the inability to diagnose tumors in their early stage. By the time the tumor is confirmed, the cancer may have already metastasized, thereby making therapies challenging or even impossible. It is therefore crucial to develop new or to improve existing diagnostic tools to enable diagnosis of cancer in its early or even pre-syndrome stage. The emergence of nanotechnology has provided such a possibility. Unique physical and physiochemical properties allow nanoparticles to be utilized as tags with excellent sensitivity. When coupled with the appropriate targeting molecules, nanoparticle-based probes can interact with a biological system and sense biological changes on the molecular level with unprecedented accuracy. In the past several years, much progress has been made in applying nanotechnology to clinical imaging and diagnostics, and interdisciplinary efforts have made an impact on clinical cancer management. This article aims to review the progress in this exciting area with emphases on the preparation and engineering techniques that have been developed to assemble "smart" nanoprobes.
Collapse
Affiliation(s)
- Hongmin Chen
- Department of Chemistry and Bio-Imaging Research Center, University of Georgia, 1001 Cedar Street, Athens, GA 30602
| | - Zipeng Zhen
- Department of Chemistry and Bio-Imaging Research Center, University of Georgia, 1001 Cedar Street, Athens, GA 30602
| | - Trever Todd
- Department of Chemistry and Bio-Imaging Research Center, University of Georgia, 1001 Cedar Street, Athens, GA 30602
| | - Paul K. Chu
- Department of Physics & Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Jin Xie
- Department of Chemistry and Bio-Imaging Research Center, University of Georgia, 1001 Cedar Street, Athens, GA 30602
| |
Collapse
|
177
|
Mittal AK, Chisti Y, Banerjee UC. Synthesis of metallic nanoparticles using plant extracts. Biotechnol Adv 2013; 31:346-56. [DOI: 10.1016/j.biotechadv.2013.01.003] [Citation(s) in RCA: 1399] [Impact Index Per Article: 127.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 12/24/2012] [Accepted: 01/04/2013] [Indexed: 12/11/2022]
|
178
|
Dubey SP, Dwivedi AD, Lahtinen M, Lee C, Kwon YN, Sillanpaa M. Protocol for development of various plants leaves extract in single-pot synthesis of metal nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:134-142. [PMID: 23257341 DOI: 10.1016/j.saa.2012.11.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 10/31/2012] [Accepted: 11/05/2012] [Indexed: 06/01/2023]
Abstract
This article is aimed to extend a simple protocol for preparation of various plant leaves extract and their application to green synthesis of the metallic nanoparticles. Five plant leaves extract showed mild reduction and stabilization ability for silver and gold nanoparticles (AgNPs and AuNPs) at room temperature. The particle size range varied from 25 to 42 nm and 21 to 47 nm for AgNPs and AuNPs, respectively. Plant leaves extract-mediated nanoparticles were characterized to confirm the shape, size, crystallinity, and content using different spectroscopic investigations. Differences in stability of nanoparticles at different pH were also measured by zeta potential.
Collapse
Affiliation(s)
- Shashi Prabha Dubey
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 698-805, Republic of Korea.
| | | | | | | | | | | |
Collapse
|
179
|
Bindhu MR, Umadevi M. Synthesis of monodispersed silver nanoparticles using Hibiscus cannabinus leaf extract and its antimicrobial activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 101:184-90. [PMID: 23103459 DOI: 10.1016/j.saa.2012.09.031] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 08/24/2012] [Accepted: 09/04/2012] [Indexed: 05/15/2023]
Abstract
Synthesis of silver nanoparticles using leaf extract of Hibiscus cannabinus has been investigated. The influences of different concentration of H. cannabinus leaf extract, different metal ion concentration and different reaction time on the above cases on the synthesis of nanoparticles were evaluated. The synthesized nanoparticles were characterized using UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM). The prepared silver nanoparticles were monodispersed, spherical in shape with the average particle size of 9 nm and shows surface plasmon peak at 446 nm. The study also reveals that the ascorbic acid present in H. cannabinus leaf extract has been used as reducing agent. The prepared silver nanoparticle shows good antimicrobial activity against Escherichia coli, Proteus mirabilis and Shigella flexneri.
Collapse
Affiliation(s)
- M R Bindhu
- Department of Physics, Mother Teresa Women's University, Kodaikanal 624 101, Tamil Nadu, India
| | | |
Collapse
|
180
|
Awwad AM, Salem NM, Abdeen AO. Green synthesis of silver nanoparticles using carob leaf extract and its antibacterial activity. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2013. [DOI: 10.1186/2228-5547-4-29] [Citation(s) in RCA: 241] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
181
|
Chunyan W, Valiyaveettil S. Correlation of biocapping agents with cytotoxic effects of silver nanoparticles on human tumor cells. RSC Adv 2013. [DOI: 10.1039/c3ra41346b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
|
182
|
Rodríguez-León E, Iñiguez-Palomares R, Navarro RE, Herrera-Urbina R, Tánori J, Iñiguez-Palomares C, Maldonado A. Synthesis of silver nanoparticles using reducing agents obtained from natural sources (Rumex hymenosepalus extracts). NANOSCALE RESEARCH LETTERS 2013; 8:318. [PMID: 23841946 PMCID: PMC3716778 DOI: 10.1186/1556-276x-8-318] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 05/30/2013] [Indexed: 05/21/2023]
Abstract
We have synthesized silver nanoparticles from silver nitrate solutions using extracts of Rumex hymenosepalus, a plant widely found in a large region in North America, as reducing agent. This plant is known to be rich in antioxidant molecules which we use as reducing agents. Silver nanoparticles grow in a single-step method, at room temperature, and with no addition of external energy. The nanoparticles have been characterized by ultraviolet-visible spectroscopy and transmission electron microscopy, as a function of the ratio of silver ions to reducing agent molecules. The nanoparticle diameters are in the range of 2 to 40 nm. High-resolution transmission electron microscopy and fast Fourier transform analysis show that two kinds of crystal structures are obtained: face-centered cubic and hexagonal.
Collapse
Affiliation(s)
- Ericka Rodríguez-León
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, Sonora 83000, México
| | - Ramón Iñiguez-Palomares
- Departamento de Física, Universidad de Sonora, Apartado Postal 1626, Hermosillo, Sonora 83000, México
| | - Rosa Elena Navarro
- Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo, Sonora 83000, México
| | - Ronaldo Herrera-Urbina
- Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, Hermosillo, Sonora 83000, México
| | - Judith Tánori
- Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo, Sonora 83000, México
| | | | - Amir Maldonado
- Departamento de Física, Universidad de Sonora, Apartado Postal 1626, Hermosillo, Sonora 83000, México
| |
Collapse
|
183
|
Abstract
Imaging for diagnostics or for evaluating the efficacy of a particular drug constitutes a key challenge, and a topical area of research in nanomedicine. There has been a tremendous effort devoted to the evaluation of a variety of contrast agents, and gold nanomaterials due to their inherent and geometrically induced optical properties, have offered significant potential for in vivo imaging. The gold based nanostructures that are most commonly employed for biological imaging include nano-spheres, -rods, -shells, -cages and -stars. This feature article provides an overview of the current state of research in utilizing these gold nano-architectures in imaging, with particular emphasis on modalities such as two-photon luminescence, computed tomography, optical coherence tomography, near infrared and photoacoustic imaging.
Collapse
Affiliation(s)
- Vanessa W K Ng
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montréal, Canada.
| | | | | | | |
Collapse
|
184
|
Szydłowska-Czerniak A, Tułodziecka A, Szłyk E. A silver nanoparticle-based method for determination of antioxidant capacity of rapeseed and its products. Analyst 2012; 137:3750-9. [PMID: 22741160 DOI: 10.1039/c2an35326a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel silver nanoparticle-based (AgNP) method and two modified procedures, ferric reducing antioxidant power (FRAP) and 2,2'-diphenyl-1-picrylhydrazyl (DPPH), were used for determination of antioxidant capacities of the ethanolic, methanolic, methanolic-aqueous (1 : 1 v/v) and aqueous extracts of rapeseed and its products. The AgNP method based on the electron-transfer reaction between silver ions and antioxidants in an optimized ammonium buffer medium (pH = 8.4) and determination of silver nanoparticle formation has been elaborated. The novel AgNP method was validated using sinapic acid, gallic acid, caffeic acid, ascorbic acid and quercetin as standard antioxidant solutions in concentration ranges of 0.03-0.21 µmol mL(-1), 0.02-0.20 µmol mL(-1), 0.01-0.18 µmol mL(-1), 0.03-0.30 µmol mL(-1) and 0.001-0.009 µmol mL(-1). The calculated detection (DL = 0.01, 0.02, 0.009, 0.02 and 0.0004 µmol mL(-1) for sinapic, gallic, caffeic, ascorbic acids and quercetin, respectively) and quantification limits (QL = 0.04, 0.06, 0.03, 0.08 and 0.001 µmol mL(-1) for sinapic, gallic, caffeic, ascorbic acids and quercetin, respectively) confirm linearity concentration ranges for determination of antioxidant capacity by AgNP assay. The average antioxidant capacities of the studied rapeseed samples ranged between 14.7 and 126.2 µmol sinapic acid per gram for the proposed AgNP method, 7.4-112.7 µmol sinapic acid per gram for the FRAP method and 39.1-339.8 µmol sinapic acid per gram for DPPH assay. The methanol-water mixture (1:1 v/v) was the most efficient solvent for extraction of antioxidants from the studied rapeseed samples. There are significant, positive correlations between the novel AgNP and the modified FRAP, DPPH and FC methods for all extracts of the studied rapeseed samples (r = 0.7564-0.8516, p < 0.001). Satisfactory values of precision (RSD = 1.2-4.4%) and accuracy (recovery = 95.6-104.6%, except methanolic extracts) demonstrate the benefit of the proposed AgNP method for analysis of the antioxidant capacity of rapeseed samples. Results of the principal component analysis (PCA) indicate that there are differences between the total amounts of antioxidants in rapeseed samples extracted by different solvents.
Collapse
|
185
|
Sreekanth TVM, Nagajyothi PC, Lee KD. Dioscorea batatas Rhizome-Assisted Rapid Biogenic Synthesis of Silver and Gold Nanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/15533174.2011.613886] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- T. V. M. Sreekanth
- a Department of Nanomaterial Chemistry , Dongguk University , Gyeongju , South Korea
| | - P. C. Nagajyothi
- a Department of Nanomaterial Chemistry , Dongguk University , Gyeongju , South Korea
| | - Kap Duk Lee
- a Department of Nanomaterial Chemistry , Dongguk University , Gyeongju , South Korea
| |
Collapse
|
186
|
St. Angelo SK, Hartz EL. Ginkgo as a Green Reducing Agent for Gold Nanoparticles and Nanoplatelets. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/19430892.2012.678706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
187
|
Pine cone-mediated green synthesis of silver nanoparticles and their antibacterial activity against agricultural pathogens. Appl Microbiol Biotechnol 2012; 97:361-8. [DOI: 10.1007/s00253-012-3892-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 01/01/2012] [Accepted: 01/04/2012] [Indexed: 10/14/2022]
|
188
|
Narayanan KB, Sakthivel N. Green synthesis of biogenic metal nanoparticles by terrestrial and aquatic phototrophic and heterotrophic eukaryotes and biocompatible agents. Adv Colloid Interface Sci 2011; 169:59-79. [PMID: 21981929 DOI: 10.1016/j.cis.2011.08.004] [Citation(s) in RCA: 233] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 08/28/2011] [Accepted: 08/28/2011] [Indexed: 11/30/2022]
Abstract
The size, shape and controlled dispersity of nanoparticles play a vital role in determining the physical, chemical, optical and electronic properties attributing its applications in environmental, biotechnological and biomedical fields. Various physical and chemical processes have been exploited in the synthesis of several inorganic metal nanoparticles by wet and dry approaches viz., ultraviolet irradiation, aerosol technologies, lithography, laser ablation, ultrasonic fields, and photochemical reduction techniques. However, these methodologies remain expensive and involve the use of hazardous chemicals. Therefore, there is a growing concern for the development of alternative environment friendly and sustainable methods. Increasing awareness towards green chemistry and biological processes has led to a necessity to develop simple, cost-effective and eco-friendly procedures. Phototrophic eukaryotes such as plants, algae, and diatoms and heterotrophic human cell lines and some biocompatible agents have been reported to synthesize greener nanoparticles like cobalt, copper, silver, gold, bimetallic alloys, silica, palladium, platinum, iridium, magnetite and quantum dots. Owing to the diversity and sustainability, the use of phototrophic and heterotrophic eukaryotes and biocompatible agents for the synthesis of nanomaterials is yet to be fully explored. This review describes the recent advancements in the green synthesis and applications of metal nanoparticles by plants, aquatic autotrophs, human cell lines, biocompatible agents and biomolecules.
Collapse
Affiliation(s)
- Kannan Badri Narayanan
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, Puducherry 605014, India
| | | |
Collapse
|
189
|
Vidhu VK, Aromal SA, Philip D. Green synthesis of silver nanoparticles using Macrotyloma uniflorum. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 83:392-397. [PMID: 21920808 DOI: 10.1016/j.saa.2011.08.051] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 08/17/2011] [Accepted: 08/24/2011] [Indexed: 05/31/2023]
Abstract
Green synthesis of noble metal nanoparticles is a vast developing area of research. In this paper we report the green synthesis of silver nanoparticles using aqueous seed extract of Macrotyloma uniflorum. The effect of experimental parameters such as amount of extract, temperature and pH on the formation of silver nanoparticles was studied. The as prepared samples are characterized using XRD, TEM, UV-Visible and FTIR techniques. The formation of silver nanoparticles is evidenced by the appearance of signatory brown colour of the solution and UV-vis spectra. The XRD analysis shows that the silver nanoparticles are of face centered cubic structure. Well-dispersed silver nanoparticles with anisotropic morphology having size ∼12 nm are seen in TEM images. FTIR spectrum indicates the presence of different functional groups in capping the nanoparticles. The possible mechanism leading to the formation of silver nanoparticles is suggested.
Collapse
Affiliation(s)
- V K Vidhu
- Department of Physics, Mar Ivanios College, Thiruvananthapuram, India
| | | | | |
Collapse
|
190
|
Philip D. Mangifera indica leaf-assisted biosynthesis of well-dispersed silver nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:327-331. [PMID: 21030295 DOI: 10.1016/j.saa.2010.10.015] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Accepted: 10/01/2010] [Indexed: 05/30/2023]
Abstract
The use of various parts of plants for the synthesis of nanoparticles is considered as a green technology as it does not involve any harmful chemicals. The present study reports a facile and rapid biosynthesis of well-dispersed silver nanoparticles. The method developed is environmentally friendly and allows the reduction to be accelerated by changing the temperature and pH of the reaction mixture consisting of aqueous AgNO3 and Mangifera Indica leaf extract. At a pH of 8, the colloid consists of well-dispersed triangular, hexagonal and nearly spherical nanoparticles having size ∼20 nm. The UV-vis spectrum of silver nanoparticles gave surface plasmon resonance (SPR) at 439 nm. The synthesized nanocrystals were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. Water soluble organics present in the leaf are responsible for the reduction of silver ions. This green method provides faster synthesis comparable to chemical methods and can be used in areas such as cosmetics, foods and medical applications.
Collapse
Affiliation(s)
- Daizy Philip
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, India.
| |
Collapse
|