301
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Abramson S, Safraou W, Malezieux B, Dupuis V, Borensztajn S, Briot E, Bée A. An eco-friendly route to magnetic silica microspheres and nanospheres. J Colloid Interface Sci 2011; 364:324-32. [DOI: 10.1016/j.jcis.2011.08.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 08/05/2011] [Accepted: 08/22/2011] [Indexed: 10/17/2022]
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302
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Guidelli EJ, Ramos AP, Zaniquelli MED, Baffa O. Green synthesis of colloidal silver nanoparticles using natural rubber latex extracted from Hevea brasiliensis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 82:140-145. [PMID: 21803643 DOI: 10.1016/j.saa.2011.07.024] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 05/23/2011] [Accepted: 07/07/2011] [Indexed: 05/31/2023]
Abstract
Colloidal silver nanoparticles were synthesized by an easy green method using thermal treatment of aqueous solutions of silver nitrate and natural rubber latex (NRL) extracted from Hevea brasiliensis. The UV-Vis spectra detected the characteristic surface plasmonic absorption band around 435 nm. Both NRL and AgNO(3) contents in the reaction medium have influence in the Ag nanoparticles formation. Lower AgNO(3) concentration led to decreased particle size. The silver nanoparticles presented diameters ranging from 2 nm to 100 nm and had spherical shape. The selected area electron diffraction (SAED) patterns indicated that the silver nanoparticles have face centered cubic (fcc) crystalline structure. FTIR spectra suggest that reduction of the silver ions are facilitated by their interaction with the amine groups from ammonia, which is used for conservation of the NRL, whereas the stability of the particles results from cis-isoprene binding onto the surface of nanoparticles. Therefore natural rubber latex extracted from H. brasiliensis can be employed in the preparation of stable aqueous dispersions of silver nanoparticles acting as a dispersing and/or capping agent. Moreover, this work provides a new method for the synthesis of silver nanoparticles that is simple, easy to perform, pollutant free and inexpensive.
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Affiliation(s)
- Eder José Guidelli
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brazil.
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303
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Parashar UK, Kumar V, Bera T, Saxena PS, Nath G, Srivastava SK, Giri R, Srivastava A. Study of mechanism of enhanced antibacterial activity by green synthesis of silver nanoparticles. NANOTECHNOLOGY 2011; 22:415104. [PMID: 21918296 DOI: 10.1088/0957-4484/22/41/415104] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The extensive use of silver nanoparticles needs a synthesis process that is greener without compromising their properties. The present study describes a novel green synthesis of silver nanoparticles using Guava (Psidium guajava) leaf extract. In order to compare with the conventionally synthesized ones, we also prepared Ag-NPs by chemical reduction. Their optical and morphological characteristics were thoroughly investigated and tested for their antibacterial properties on Escherichia coli. The green synthesized silver nanoparticles showed better antibacterial properties than their chemical counterparts even though there was not much difference between their morphologies. Fourier transform infrared (FTIR) spectroscopic analysis of the used extract and as-synthesized silver nanoparticles suggests the possible reduction of Ag(+) by the water-soluble ingredients of the guava leaf like tannins, eugenol and flavonoids. The possible reaction mechanism for the reduction of Ag(+) has been proposed and discussed. The time-dependent electron micrographs and the simulation studies indicated that a physical interaction between the silver nanoparticles and the bacterial cell membrane may be responsible for this effect. Based on the findings, it seems very reasonable to believe that this greener way of synthesizing silver nanoparticles is not just an environmentally viable technique but it also opens up scope to improve their antibacterial properties.
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304
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Utilization of hydroxypropyl cellulose for green and efficient synthesis of silver nanoparticles. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.06.072] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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305
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A sweet killer: mesoporous polysaccharide confined silver nanoparticles for antibacterial applications. Int J Mol Sci 2011; 12:5782-96. [PMID: 22016626 PMCID: PMC3189750 DOI: 10.3390/ijms12095782] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 08/23/2011] [Indexed: 11/16/2022] Open
Abstract
Silver nanoparticles (AgNP) confined within porous starch have been prepared in a simple, green and efficient manner, utilising the nanoporous structure of predominantly mesoporous starch (MS) to act as nanoparticle stabiliser, support and reducing surface. MS/AgNP materials present high surface areas (S(BET) > 150 m(2) g(-1)) and mesopore volumes (V(meso) > 0.45 cm(3) g(-1)). The interaction of the AgNP precursor and forming nanoparticle nuclei with the mesoporous domains of the porous polysaccharide, direct porosity to increasingly narrower and more defined pore size distributions, indicative of a degree of cooperative assembly. Transmission electron microscopy images indicated the presence of spherical AgNP of a size reflective of the porous polysaccharide mesopore diameter (e.g., 5-25 nm), whilst XPS analysis confirmed the metallic Ag(0) state. Materials were prepared at relatively low Ag loadings (<0.18 mmol g(-1)), demonstrating excellent antimicrobial activity in solid and liquid phase testing against Gram negative (E. coli) and positive (S. aureus) model bacteria. The resulting materials are biocompatible and present a useful solid porous carbohydrate-based polymer vehicle to control the AgNP size regime and facilitate transference to a biological environment.
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306
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El-Shishtawy RM, Asiri AM, Al-Otaibi MM. Synthesis and spectroscopic studies of stable aqueous dispersion of silver nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:1505-10. [PMID: 21703920 DOI: 10.1016/j.saa.2011.05.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 04/18/2011] [Accepted: 05/11/2011] [Indexed: 05/23/2023]
Abstract
A facile approach for the synthesis of stable aqueous dispersion of silver nanoparticles (AgNPs) using glucose as the reducing agent in water/micelles system, in which cetyltrimethylammonium bromide (CTAB) was used as capping agent (stabilizer) is described. The evolution of plasmon band of AgNPs was monitored under different conditions such as (a) concentration of sodium hydroxide, (b) concentration of glucose, (c) concentration of silver nitrate (d) concentration of CTAB, and (e) reaction time. AgNPs were characterized by UV-visible spectroscopy, transmission electron microscopy (TEM), fluorescence spectroscopy and FT-IR spectroscopy. The results revealed an easy and viable strategy for obtaining stable aqueous dispersion of AgNPs with well controlled shape and size below 30 nm in diameter.
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Affiliation(s)
- Reda M El-Shishtawy
- Chemistry Department, Faculty of Science, King Abdul Aziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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307
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Silva AR, Unali G. Controlled silver delivery by silver-cellulose nanocomposites prepared by a one-pot green synthesis assisted by microwaves. NANOTECHNOLOGY 2011; 22:315605. [PMID: 21747160 DOI: 10.1088/0957-4484/22/31/315605] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Controlled silver release from cellulosic nanocomposites was achieved by synthesizing silver nanoparticles, under microwave heating for 1-15 min, in a one-pot, versatile and sustainable process in which microcrystalline cellulose simultaneously functions as reducing, stabilizing and supporting agent in water; chitin, starch and other cellulose derivatives could also be used as reducing, stabilizing and supporting agents for silver nanoparticles and the method was also found to be extensible to the preparation of noble metal (Au, Pt) and metal oxide nanoparticle (ZnO, Cu, CuO and Cu(2)O) nanocomposites.
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Affiliation(s)
- Ana Rosa Silva
- Structured Materials Expertise Group, Unilever Discover Port Sunlight, Bebington, United Kingdom.
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308
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Xia N, Cai Y, Jiang T, Yao J. Green synthesis of silver nanoparticles by chemical reduction with hyaluronan. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.05.053] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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309
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Environmental synthesis of silver nanoparticles using hydroxypropyl starch and their characterization. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.04.088] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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310
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MubarakAli D, Thajuddin N, Jeganathan K, Gunasekaran M. Plant extract mediated synthesis of silver and gold nanoparticles and its antibacterial activity against clinically isolated pathogens. Colloids Surf B Biointerfaces 2011; 85:360-5. [DOI: 10.1016/j.colsurfb.2011.03.009] [Citation(s) in RCA: 470] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 03/09/2011] [Accepted: 03/09/2011] [Indexed: 10/18/2022]
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311
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Abdel-Halim E, El-Rafie M, Al-Deyab SS. Polyacrylamide/guar gum graft copolymer for preparation of silver nanoparticles. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.03.039] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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312
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Abstract
Stable silver nanoparticles were synthesized from AgNO3through a simple green route using biodegradable and renewable starch as stabilizing agent. Nanoparticles have been studied for their formation, structure, morphology and size using UV–vis spectroscopy, X-ray diffraction (XRD) and HRTEM analysis. XRD showed that the nanoparticles were of face centered cubic structure. UV–Vis and HRTEM revealed that the spherical particles having radius 5-20 nm are mostly stabilized by starch. Further, antibacterial properties of these starch-stabilized nanoparticles show promising results for S.aureus in growth inhibition ring test.
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313
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Microwave assisted synthesis and UV–Vis spectroscopic studies of silver nanoparticles synthesized using vanillin as a reducing agent. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.01.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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314
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Park S, Murthy PK, Park S, Mohan YM, Koh WG. Preparation of silver nanoparticle-containing semi-interpenetrating network hydrogels composed of pluronic and poly(acrylamide) with antibacterial property. J IND ENG CHEM 2011. [DOI: 10.1016/j.jiec.2011.02.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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315
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Saifuddin N, Nian C, Zhan L, Ning K. Chitosan-silver Nanoparticles Composite as Point-of-use Drinking Water Filtration System for Household to Remove Pesticides in Water. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/ajb.2011.142.159] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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316
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An J, Luo Q, Yuan X, Wang D, Li X. Preparation and characterization of silver-chitosan nanocomposite particles with antimicrobial activity. J Appl Polym Sci 2011. [DOI: 10.1002/app.33532] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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317
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Busolo MA, Fernandez P, Ocio MJ, Lagaron JM. Novel silver-based nanoclay as an antimicrobial in polylactic acid food packaging coatings. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 27:1617-26. [PMID: 20711905 DOI: 10.1080/19440049.2010.506601] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
This paper presents a comprehensive performance study of polylactic acid (PLA) biocomposites, obtained by solvent casting, containing a novel silver-based antimicrobial layered silicate additive for use in active food packaging applications. The silver-based nanoclay showed strong antimicrobial activity against Gram-negative Salmonella spp. Despite the fact that no exfoliation of the silver-based nanoclay in PLA was observed, as suggested by transmission electron microscopy (TEM) and wide angle X-ray scattering (WAXS) experiments, the additive dispersed nicely throughout the PLA matrix to a nanoscale, yielding nanobiocomposites. The films were highly transparent with enhanced water barrier and strong biocidal properties. Silver migration from the films to a slightly acidified water medium, considered an aggressive food simulant, was measured by stripping voltammetry. Silver migration accelerated after 6 days of exposure. Nevertheless, the study suggests that migration levels of silver, within the specific migration levels referenced by the European Food Safety Agency (EFSA), exhibit antimicrobial activity, supporting the potential application of this biocidal additive in active food-packaging applications to improve food quality and safety.
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Affiliation(s)
- Maria A Busolo
- Novel Materials and Nanotechnology Group, IATA-CSIC, Burjassot (Valencia), 46980 Paterna, Spain
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318
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Senra JD, Malta LFB, Michel RC, Cordeiro Y, Simão RA, Simas ABC, Aguiar LCS. Hydrophilic cyclodextrin protected Pd nanoclusters: insights into their size control and host–guest behavior. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm11962a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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319
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Dal Lago V, França de Oliveira L, de Almeida Gonçalves K, Kobarg J, Borba Cardoso M. Size-selective silver nanoparticles: future of biomedical devices with enhanced bactericidal properties. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12297e] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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320
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Park Y, Hong Y, Weyers A, Kim Y, Linhardt R. Polysaccharides and phytochemicals: a natural reservoir for the green synthesis of gold and silver nanoparticles. IET Nanobiotechnol 2011; 5:69-78. [DOI: 10.1049/iet-nbt.2010.0033] [Citation(s) in RCA: 317] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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321
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Vinod VTP, Saravanan P, Sreedhar B, Devi DK, Sashidhar RB. A facile synthesis and characterization of Ag, Au and Pt nanoparticles using a natural hydrocolloid gum kondagogu (Cochlospermum gossypium). Colloids Surf B Biointerfaces 2010; 83:291-8. [PMID: 21185161 DOI: 10.1016/j.colsurfb.2010.11.035] [Citation(s) in RCA: 161] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 11/22/2010] [Accepted: 11/25/2010] [Indexed: 11/26/2022]
Abstract
An environmentally benign method for the synthesis of noble metal nanoparticles has been reported using aqueous solution of gum kondagogu (Cochlospermum gossypium). Both the synthesis, as well as stabilization of colloidal Ag, Au and Pt nanoparticles has been accomplished in an aqueous medium containing gum kondagogu. The colloidal suspensions so obtained were found to be highly stable for prolonged period, without undergoing any oxidation. SEM-EDXA, UV-vis spectroscopy, XRD, FTIR and TEM techniques were used to characterize the Ag, Au and Pt nanoparticles. FTIR analysis indicates that -OH groups present in the gum matrix were responsible for the reduction of metal cations into nanoparticles. UV-vis studies showed a distinct surface plasmon resonance at 412 and 525 nm due to the formation of Au and Ag nanoparticles, respectively, within the gum network. XRD studies indicated that the nanoparticles were crystalline in nature with face centered cubic geometry. The noble metal nanoparticles prepared in the present study appears to be homogeneous with the particle size ranging between 2 and 10 nm, as evidenced by TEM analysis. The Ag and Au nanoparticles formed were in the average size range of 5.5±2.5 nm and 7.8±2.3 nm; while Pt nanoparticles were in the size range of 2.4±0.7 nm, which were considerably smaller than Ag and Au nanoparticles. The present approach exemplifies a totally green synthesis using the plant derived natural product (gum kondagogu) for the production of noble metal nanoparticles and the process can also be extended to the synthesis of other metal oxide nanoparticles.
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Affiliation(s)
- V T P Vinod
- Jonaki, Board of Radiation and Isotope Technology, Department of Atomic Energy, CCMB Campus, Uppal Road, Hyderabad 500 007, Andhra Pradesh, India
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322
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Valodkar M, Thakore S. Isocyanate crosslinked reactive starch nanoparticles for thermo-responsive conducting applications. Carbohydr Res 2010; 345:2354-60. [DOI: 10.1016/j.carres.2010.08.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Revised: 08/03/2010] [Accepted: 08/12/2010] [Indexed: 10/19/2022]
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323
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Kora AJ, Sashidhar R, Arunachalam J. Gum kondagogu (Cochlospermum gossypium): A template for the green synthesis and stabilization of silver nanoparticles with antibacterial application. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.05.034] [Citation(s) in RCA: 248] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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324
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Bioprospective of Sorbus aucuparia leaf extract in development of silver and gold nanocolloids. Colloids Surf B Biointerfaces 2010; 80:26-33. [DOI: 10.1016/j.colsurfb.2010.05.024] [Citation(s) in RCA: 187] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 05/10/2010] [Accepted: 05/11/2010] [Indexed: 11/22/2022]
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325
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Hebeish A, El-Rafie M, Abdel-Mohdy F, Abdel-Halim E, Emam H. Carboxymethyl cellulose for green synthesis and stabilization of silver nanoparticles. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.06.020] [Citation(s) in RCA: 202] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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326
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Ghosh S, Kaushik R, Nagalakshmi K, Hoti S, Menezes G, Harish B, Vasan H. Antimicrobial activity of highly stable silver nanoparticles embedded in agar–agar matrix as a thin film. Carbohydr Res 2010; 345:2220-7. [DOI: 10.1016/j.carres.2010.08.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Revised: 07/27/2010] [Accepted: 08/04/2010] [Indexed: 11/27/2022]
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327
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Chaloupka K, Malam Y, Seifalian AM. Nanosilver as a new generation of nanoproduct in biomedical applications. Trends Biotechnol 2010; 28:580-8. [PMID: 20724010 DOI: 10.1016/j.tibtech.2010.07.006] [Citation(s) in RCA: 769] [Impact Index Per Article: 54.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 07/14/2010] [Accepted: 07/19/2010] [Indexed: 02/06/2023]
Abstract
Nanosilver (NS), comprising silver nanoparticles, is attracting interest for a range of biomedical applications owing to its potent antibacterial activity. It has recently been demonstrated that NS has useful anti-inflammatory effects and improves wound healing, which could be exploited in developing better dressings for wounds and burns. The key to its broad-acting and potent antibacterial activity is the multifaceted mechanism by which NS acts on microbes. This is utilized in antibacterial coatings on medical devices to reduce nosocomial infection rates. Many new synthesis methods have emerged and are being evaluated for NS production for medical applications. NS toxicity is also critically discussed to reflect on potential concerns before widespread application in the medical field.
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Affiliation(s)
- Karla Chaloupka
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK
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328
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Dubey SP, Lahtinen M, Sillanpää M. Green synthesis and characterizations of silver and gold nanoparticles using leaf extract of Rosa rugosa. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.04.023] [Citation(s) in RCA: 298] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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329
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Huang N, Lim H, Radiman S, Khiew P, Chiu W, Hashim R, Chia C. Sucrose ester micellar-mediated synthesis of Ag nanoparticles and the antibacterial properties. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.10.023] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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330
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Wei D, Ye Y, Jia X, Yuan C, Qian W. Chitosan as an active support for assembly of metal nanoparticles and application of the resultant bioconjugates in catalysis. Carbohydr Res 2010; 345:74-81. [DOI: 10.1016/j.carres.2009.10.008] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Revised: 10/11/2009] [Accepted: 10/13/2009] [Indexed: 11/29/2022]
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331
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Binupriya AR, Sathishkumar M, Yun SI. Myco-crystallization of Silver Ions to Nanosized Particles by Live and Dead Cell Filtrates of Aspergillus oryzae var. viridis and Its Bactericidal Activity toward Staphylococcus aureus KCCM 12256. Ind Eng Chem Res 2009. [DOI: 10.1021/ie9014183] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Arthur Raj Binupriya
- Department of Food Science and Technology, College of Agriculture and Life Science, Chonbuk National University, Jeonju 561-756, Korea, and Singapore−Delft Water Alliance, National University of Singapore, 2 Engineering Drive 2, Singapore 117577, Singapore
| | - Muthuswamy Sathishkumar
- Department of Food Science and Technology, College of Agriculture and Life Science, Chonbuk National University, Jeonju 561-756, Korea, and Singapore−Delft Water Alliance, National University of Singapore, 2 Engineering Drive 2, Singapore 117577, Singapore
| | - Soon-Il Yun
- Department of Food Science and Technology, College of Agriculture and Life Science, Chonbuk National University, Jeonju 561-756, Korea, and Singapore−Delft Water Alliance, National University of Singapore, 2 Engineering Drive 2, Singapore 117577, Singapore
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332
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Nair AS, Binoy NP, Ramakrishna S, Kurup TRR, Chan LW, Goh CH, Islam MR, Utschig T, Pradeep T. Organic-soluble antimicrobial silver nanoparticle-polymer composites in gram scale by one-pot synthesis. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2413-2419. [PMID: 20356108 DOI: 10.1021/am9005034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report a one-pot synthesis of silver nanoparticle-polymer composites (Ag-PNCs) in water by a novel finding involving the polycondensation of methoxybenzyl chlorides (MeO-BzCl) directly on Ag nanoparticle surfaces at room temperature, leading to highly soluble antimicrobial nanocomposites. The composites, which are soluble in a range of organic solvents, precipitate in the reaction vessel, making their separation simple. Solutions of the composites can be casted directly on substrates or made into freestanding films. The material was found to be stable for nearly 2 years. A range of substrates have been shown to become antibacterial by direct application of this material. The experiments were conducted with Ag-PNC-loaded filter paper strips and glass substrates. The samples were found to be antimicrobial (against Escerichia coli and Aspergillus niger). The simple one-pot approach of this kind to make organic-soluble antibacterial coatings could have wide implications.
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333
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Djoković V, Krsmanović R, Božanić DK, McPherson M, Van Tendeloo G, Nair PS, Georges MK, Radhakrishnan T. Adsorption of sulfur onto a surface of silver nanoparticles stabilized with sago starch biopolymer. Colloids Surf B Biointerfaces 2009; 73:30-5. [DOI: 10.1016/j.colsurfb.2009.04.022] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 04/21/2009] [Accepted: 04/22/2009] [Indexed: 11/24/2022]
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334
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Green synthesis of silver nanoparticles using seed extract of Jatropha curcas. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.07.021] [Citation(s) in RCA: 394] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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335
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Biopolymer-protected CdSe nanoparticles. Carbohydr Res 2009; 344:2383-7. [PMID: 19772959 DOI: 10.1016/j.carres.2009.08.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 07/17/2009] [Accepted: 08/19/2009] [Indexed: 11/22/2022]
Abstract
A synthetic procedure for the encapsulation of cadmium selenide (CdSe) nanoparticles in a sago starch matrix is introduced. The nanocomposite was investigated using structural, spectroscopic, and thermal methods. TEM micrographs of the nanocomposite showed spherical CdSe particles of 4-5 nm in size coated with a biopolymer layer. The absorption edges of both the aqueous solution and the thin film of the CdSe-starch nanocomposite were shifted toward lower wavelengths in comparison to the value of the bulk semiconductor. Infrared measurements revealed that the interaction of CdSe nanoparticles and starch chains takes place via OH groups. Although the onset of the temperature of decomposition of CdSe-starch nanocomposite is lower than that of the pure matrix, thermogravimetric analysis also showed that introduction of CdSe nanoparticles significantly reduced starch degradation rate leading to high residual mass at the end of the degradation process.
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An J, Wang D, Luo Q, Yuan X. Antimicrobial active silver nanoparticles and silver/polystyrene core-shell nanoparticles prepared in room-temperature ionic liquid. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2009.03.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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337
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Green Synthesis of Silver Nanoparticles by Sinorhizobial Octasaccharide Isolated from Sinorhizobium meliloti. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.7.1651] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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338
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339
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Bar H, Bhui DK, Sahoo GP, Sarkar P, De SP, Misra A. Green synthesis of silver nanoparticles using latex of Jatropha curcas. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.02.008] [Citation(s) in RCA: 452] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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340
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Controlled silver nanoparticles synthesis in semi-hydrogel networks of poly(acrylamide) and carbohydrates: A rational methodology for antibacterial application. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.08.009] [Citation(s) in RCA: 243] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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341
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Sharma VK, Yngard RA, Lin Y. Silver nanoparticles: green synthesis and their antimicrobial activities. Adv Colloid Interface Sci 2009; 145:83-96. [PMID: 18945421 DOI: 10.1016/j.cis.2008.09.002] [Citation(s) in RCA: 1727] [Impact Index Per Article: 115.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Revised: 08/23/2008] [Accepted: 09/01/2008] [Indexed: 11/28/2022]
Abstract
This review presents an overview of silver nanoparticles (Ag NPs) preparation by green synthesis approaches that have advantages over conventional methods involving chemical agents associated with environmental toxicity. Green synthetic methods include mixed-valence polyoxometallates, polysaccharide, Tollens, irradiation, and biological. The mixed-valence polyoxometallates method was carried out in water, an environmentally-friendly solvent. Solutions of AgNO(3) containing glucose and starch in water gave starch-protected Ag NPs, which could be integrated into medical applications. Tollens process involves the reduction of Ag(NH(3))(2)(+) by saccharides forming Ag NP films with particle sizes from 50-200 nm, Ag hydrosols with particles in the order of 20-50 nm, and Ag colloid particles of different shapes. The reduction of Ag(NH(3))(2)(+) by HTAB (n-hexadecyltrimethylammonium bromide) gave Ag NPs of different morphologies: cubes, triangles, wires, and aligned wires. Ag NPs synthesis by irradiation of Ag(+) ions does not involve a reducing agent and is an appealing procedure. Eco-friendly bio-organisms in plant extracts contain proteins, which act as both reducing and capping agents forming stable and shape-controlled Ag NPs. The synthetic procedures of polymer-Ag and TiO(2)-Ag NPs are also given. Both Ag NPs and Ag NPs modified by surfactants or polymers showed high antimicrobial activity against gram-positive and gram-negative bacteria. The mechanism of the Ag NP bactericidal activity is discussed in terms of Ag NP interaction with the cell membranes of bacteria. Silver-containing filters are shown to have antibacterial properties in water and air purification. Finally, human and environmental implications of Ag NPs to the ecology of aquatic environment are briefly discussed.
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Affiliation(s)
- Virender K Sharma
- Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, USA.
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342
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Singh S, Patel P, Jaiswal S, Prabhune AA, Ramana CV, Prasad BLV. A direct method for the preparation of glycolipid–metal nanoparticle conjugates: sophorolipids as reducing and capping agents for the synthesis of water re-dispersible silver nanoparticles and their antibacterial activity. NEW J CHEM 2009. [DOI: 10.1039/b811829a] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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343
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Nune SK, Chanda N, Shukla R, Katti K, Kulkarni RR, Thilakavathi S, Mekapothula S, Kannan R, Katti KV. Green Nanotechnology from Tea: Phytochemicals in Tea as Building Blocks for Production of Biocompatible Gold Nanoparticles. ACTA ACUST UNITED AC 2009; 19:2912-2920. [PMID: 20161162 DOI: 10.1039/b822015h] [Citation(s) in RCA: 207] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Phytochemicals occluded in tea have been extensively used as dietary supplements and as natural pharmaceuticals in the treatment of various diseases including human cancer. Results on the reduction capabilities of phytochemicals present in tea to reduce gold salts to the corresponding gold nanoparticles are presented in this paper. The phytochemicals present in tea serve the dual roles as effective reducing agents to reduce gold and also as stabilizers to provide robust coating on the gold nanoparticles in a single step. The Tea-generated gold nanoparticles (T-AuNPs), have demonstrated remarkable in vitro stability in various buffers including saline, histidine, HSA, and cysteine solutions. T-AuNPs with phytochemical coatings have shown significant affinity toward prostate (PC-3) and breast (MCF-7) cancer cells. Results on the cellular internalization of T-AuNPs through endocytosis into the PC-3 and MCF-7 cells are presented. The generation of T-AuNPs follows all principles of green chemistry and have been found to be non toxic as assessed through MTT assays. No 'man made' chemicals, other than gold salts, are used in this true biogenic green nanotechnological process thus paving excellent opportunities for their applications in molecular imaging and therapy.
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Affiliation(s)
- Satish K Nune
- Departments of Radiology, Physics, Bio-medical Sciences and Nuclear Science and Engineering Institute University of Missouri - Columbia, Columbia, MO 65212
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344
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Katti K, Chanda N, Shukla R, Zambre A, Suibramanian T, Kulkarni RR, Kannan R, Katti KV. Green Nanotechnology from Cumin Phytochemicals: Generation of Biocompatible Gold Nanoparticles. ACTA ACUST UNITED AC 2009; 1:B39-B52. [PMID: 19890490 DOI: 10.1080/19430850902931599] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kavita Katti
- Departments of Radiology, Physics, Bio-medical Sciences and Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO 65212, USA
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345
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Sun C, Qu R, Chen H, Ji C, Wang C, Sun Y, Wang B. Degradation behavior of chitosan chains in the ‘green’ synthesis of gold nanoparticles. Carbohydr Res 2008; 343:2595-9. [DOI: 10.1016/j.carres.2008.05.027] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Revised: 05/23/2008] [Accepted: 05/28/2008] [Indexed: 10/22/2022]
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346
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γ-Ray synthesis of starch-stabilized silver nanoparticles with antibacterial activities. Radiat Phys Chem Oxf Engl 1993 2008. [DOI: 10.1016/j.radphyschem.2008.06.010] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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347
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Shukla R, Nune SK, Chanda N, Katti K, Mekapothula S, Kulkarni RR, Welshons WV, Kannan R, Katti KV. Soybeans as a phytochemical reservoir for the production and stabilization of biocompatible gold nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:1425-36. [PMID: 18642250 DOI: 10.1002/smll.200800525] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The present study demonstrates an unprecedented green process for the production of gold nanoparticles by simple treatment of gold salts with soybean extracts. Reduction capabilities of antioxidant phytochemicals present in soybean and their ability to reduce gold salts chemically to nanoparticles with subsequent coating of proteins and a host of other phytochemicals present in soybean on the freshly generated gold nanoparticles are discussed. The new genre of green nanoparticles exhibit remarkable in vitro stability in various buffers including saline, histidine, HSA, and cysteine solutions. MTT assays reveal that the green gold nanoparticles are nontoxic and thus provide excellent opportunities for their applications in nanomedicine for molecular imaging and therapy. The overall strategy described herein for the generation of gold nanoparticles meets all 12 principles of green chemistry, as no "man-made" chemicals, other than the gold salts, are used in the green nanotechnological process.
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Affiliation(s)
- Ravi Shukla
- Department of Radiology, University of Missouri-Columbia, MO 65212, USA
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348
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Xu GN, Qiao XL, Qiu XL, Chen JG. Preparation and characterization of stable monodisperse silver nanoparticles via photoreduction. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.01.056] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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349
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Tai CY, Wang YH, Liu HS. A green process for preparing silver nanoparticles using spinning disk reactor. AIChE J 2008. [DOI: 10.1002/aic.11396] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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350
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Wei D, Qian W, Shi Y, Ding S, Xia Y. Mass synthesis of single-crystal gold nanosheets based on chitosan. Carbohydr Res 2007; 342:2494-9. [PMID: 17716636 DOI: 10.1016/j.carres.2007.07.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 06/25/2007] [Accepted: 07/03/2007] [Indexed: 10/23/2022]
Abstract
Single-crystal Au nanosheets with {111} planes as basal surfaces have been synthesized on the basis of the polysaccharide chitosan. The preferential adsorption of polar groups in chitosan molecules on {111} planes of Au nuclei may account for the formation of anisotropic nanosheets. Appropriate precursor (HAuCl(4)) concentrations are vital for the formation of Au nanosheets. The Au nanostructures thus prepared exhibit interesting shape-dependent optical properties. This convenient, environmentally friendly and low-cost route may be amenable to mass production.
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Affiliation(s)
- Dongwei Wei
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
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