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Liang Z, Xiao L, Wang Q, Zhang B, Mo W, Xie S, Liu X, Chen Y, Yang S, Du H, Wang P, Li F, Ling D. Ligand-Mediated Magnetism-Conversion Nanoprobes for Activatable Ultra-High Field Magnetic Resonance Imaging. Angew Chem Int Ed Engl 2024; 63:e202318948. [PMID: 38212253 DOI: 10.1002/anie.202318948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/13/2024]
Abstract
Ultra-high field (UHF) magnetic resonance imaging (MRI) has emerged as a focal point of interest in the field of cancer diagnosis. Despite the ability of current paramagnetic or superparamagnetic smart MRI contrast agents to selectively enhance tumor signals in low-field MRI, their effectiveness at UHF remains inadequate due to inherent magnetism. Here, we report a ligand-mediated magnetism-conversion nanoprobe (MCNP) composed of 3-mercaptopropionic acid ligand-coated silver-gadolinium bimetallic nanoparticles. The MCNP exhibits a pH-dependent magnetism conversion from ferromagnetism to diamagnetism, facilitating tunable nanomagnetism for pH-activatable UHF MRI. Under neutral pH, the thiolate (-S- ) ligands lead to short τ'm and increased magnetization of the MCNPs. Conversely, in the acidic tumor microenvironment, the thiolate ligands are protonated and transform into thiol (-SH) ligands, resulting in prolonged τ'm and decreased magnetization of the MCNP, thereby enhancing longitudinal relaxivity (r1) values at UHF MRI. Notably, under a 9 T MRI field, the pH-sensitive changes in Ag-S binding affinity of the MCNP lead to a remarkable (>10-fold) r1 increase in an acidic medium (pH 5.0). In vivo studies demonstrate the capability of MCNPs to amplify MRI signal of hepatic tumors, suggesting their potential as a next-generation UHF-tailored smart MRI contrast agent.
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Affiliation(s)
- Zeyu Liang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lin Xiao
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qiyue Wang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Bo Zhang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- World Laureates Association (WLA) Laboratories, Shanghai, 201203, China
| | - Wenkui Mo
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shangzhi Xie
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xun Liu
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Ying Chen
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Shengfei Yang
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Hui Du
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Pengzhan Wang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Fangyuan Li
- Institute of Pharmaceutics, Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- World Laureates Association (WLA) Laboratories, Shanghai, 201203, China
- Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, Hangzhou, 310009, China
- Songjiang Institute and Songjiang Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Daishun Ling
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, School of Biomedical Engineering, National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- World Laureates Association (WLA) Laboratories, Shanghai, 201203, China
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Synthesis of Ag nanoparticles by Celery leaves extract supported on magnetic biochar substrate, as a catalyst for the reduction reactions. Sci Rep 2022; 12:13678. [PMID: 35953703 PMCID: PMC9372062 DOI: 10.1038/s41598-022-18131-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 05/11/2022] [Indexed: 11/29/2022] Open
Abstract
Green synthesis of a noble metal such as Ag nanoparticles is an enormously developed research area. In this study, a biochar/Fe3O4–Ag magnetic nanocatalyst was produced via a green path by using Celery stalk as a carbon-based substrate and Celery leaf extract as reducing and stabilizing agents to construct Ag nanoparticles. The synthesized nanocatalyst was determined using various techniques, such as UV–Vis spectroscopy, FT-IR spectroscopy, XRD (X-ray diffraction), SEM/EDX spectroscopy (scanning electron microscopy/energy-dispersive X-ray), TEM (transmission electron microscopy), and VSM (vibrating sample magnetometer). To survey the catalytic action of the biochar/Fe3O4–Ag nanocatalyst, it was used in the reduction reaction of disparate nitroaromatics, aldehydes, and ketones. This catalyst has demonstrated good characteristics in terms of the amount, reusability, recoverability, activity, and structural integrity of the catalyst during the reaction. In addition, biochar/Fe3O4–Ag could be detached magnetically and recycled multiple times without significantly reducing its catalytic performance.
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Mubeen B, Ansar AN, Rasool R, Ullah I, Imam SS, Alshehri S, Ghoneim MM, Alzarea SI, Nadeem MS, Kazmi I. Nanotechnology as a Novel Approach in Combating Microbes Providing an Alternative to Antibiotics. Antibiotics (Basel) 2021; 10:1473. [PMID: 34943685 PMCID: PMC8698349 DOI: 10.3390/antibiotics10121473] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/19/2021] [Accepted: 11/25/2021] [Indexed: 12/15/2022] Open
Abstract
The emergence of infectious diseases promises to be one of the leading mortality factors in the healthcare sector. Although several drugs are available on the market, newly found microorganisms carrying multidrug resistance (MDR) against which existing drugs cannot function effectively, giving rise to escalated antibiotic dosage therapies and the need to develop novel drugs, which require time, money, and manpower. Thus, the exploitation of antimicrobials has led to the production of MDR bacteria, and their prevalence and growth are a major concern. Novel approaches to prevent antimicrobial drug resistance are in practice. Nanotechnology-based innovation provides physicians and patients the opportunity to overcome the crisis of drug resistance. Nanoparticles have promising potential in the healthcare sector. Recently, nanoparticles have been designed to address pathogenic microorganisms. A multitude of processes that can vary with various traits, including size, morphology, electrical charge, and surface coatings, allow researchers to develop novel composite antimicrobial substances for use in different applications performing antimicrobial activities. The antimicrobial activity of inorganic and carbon-based nanoparticles can be applied to various research, medical, and industrial uses in the future and offer a solution to the crisis of antimicrobial resistance to traditional approaches. Metal-based nanoparticles have also been extensively studied for many biomedical applications. In addition to reduced size and selectivity for bacteria, metal-based nanoparticles have proven effective against pathogens listed as a priority, according to the World Health Organization (WHO). Moreover, antimicrobial studies of nanoparticles were carried out not only in vitro but in vivo as well in order to investigate their efficacy. In addition, nanomaterials provide numerous opportunities for infection prevention, diagnosis, treatment, and biofilm control. This study emphasizes the antimicrobial effects of nanoparticles and contrasts nanoparticles' with antibiotics' role in the fight against pathogenic microorganisms. Future prospects revolve around developing new strategies and products to prevent, control, and treat microbial infections in humans and other animals, including viral infections seen in the current pandemic scenarios.
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Affiliation(s)
- Bismillah Mubeen
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Aunza Nayab Ansar
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Rabia Rasool
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Inam Ullah
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore 54000, Pakistan; (B.M.); (A.N.A.); (R.R.); (I.U.)
| | - Syed Sarim Imam
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.S.I.); (S.A.)
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia; (S.S.I.); (S.A.)
| | - Mohammed M. Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, Ad Diriyah 13713, Saudi Arabia;
| | - Sami I. Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka 72341, Saudi Arabia;
| | - Muhammad Shahid Nadeem
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Abstract
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Finding a sustainable, inexpensive way for Ag-NPs synthesis is considered as one of the most important requirements for industrial application. Oxidized starch was prepared using sodium periodate. Oxidized starch (DAS) was characterized by measuring aldehyde content and using FTIR spectroscopy. DAS was used as reducing and stabilizing agent for
the preparation of Ag nanoparticles (Ag-NPs). Factors that may affect the preparation of Ag-NPs include pH, AgNO3/DAS
molar ratio, temperature and time were studied. UV-Vis. spectroscopy and particle size analysis showed that DAS can act
as reducing and stabilizing agent for the preparation of Ag-NPs and the mean particle size was 19 nm. The so prepared AgNPs were used as antibacterial agent for cotton fabric using the pad dry cure method. The results of antibacterial test showed
that the presence of Ag-NPs enhanced the antibacterial properties of the treated cotton fabrics.
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Affiliation(s)
- H.M. Fahmy
- National Research Centre, Textile Research Division, 33 Bohouth Street, Dokki, Giza, P.O. 12622, Egypt
| | - A.A. Ali
- National Research Centre, Textile Research Division, 33 Bohouth Street, Dokki, Giza, P.O. 12622, Egypt
| | - A. Abou-Okeil
- National Research Centre, Textile Research Division, 33 Bohouth Street, Dokki, Giza, P.O. 12622, Egypt
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Mathew S, Victório CP, Sidhi M S J, B.H BT. Biosynthesis of silver nanoparticle using flowers of Calotropis gigantea (L.) W.T. Aiton and activity against pathogenic bacteria. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.10.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Shanbhag MM, Shetti NP, Kulkarni RM, Chandra P. Nanostructured Ba/ZnO modified electrode as a sensor material for detection of organosulfur thiosalicylic acid. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105409] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Chandra A, Bhattarai A, Yadav AK, Adhikari J, Singh M, Giri B. Green Synthesis of Silver Nanoparticles Using Tea Leaves from Three Different Elevations. ChemistrySelect 2020. [DOI: 10.1002/slct.201904826] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Abhishek Chandra
- School of Chemical SciencesCentral University of Gujarat, Gandhinagar India
| | - Ajaya Bhattarai
- Department of Chemistry, M.M.A.M.C.Tribhuvan University, Biratnagar Nepal
| | - Ashok K. Yadav
- Department of Chemistry, M.M.A.M.C.Tribhuvan University, Biratnagar Nepal
| | - Janak Adhikari
- Department of Chemistry, M.M.A.M.C.Tribhuvan University, Biratnagar Nepal
| | - Man Singh
- School of Chemical SciencesCentral University of Gujarat, Gandhinagar India
| | - Basant Giri
- Center for Analytical SciencesKathmandu Institute of Applied Sciences Kathmandu PO Box 23002 Nepal
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Ali Thamer N, Adil BH, Obaid AS. Gold Nanoparticles Synthesis Using Environmentally Friendly Approach for Inhibition Human Breast Cancer. INTERNATIONAL JOURNAL OF NANOSCIENCE 2020. [DOI: 10.1142/s0219581x19500406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this study, gold nanoparticles were synthesized in a single step biosynthetic method using aqueous leaves extract of thymus vulgaris L. It acts as a reducing and capping agent. The characterizations of nanoparticles were carried out using UV-Visible spectra, X-ray diffraction (XRD) and FTIR. The surface plasmon resonance of the as-prepared gold nanoparticles (GNPs) showed the surface plasmon resonance centered at 550[Formula: see text]nm. The XRD pattern showed that the strong four intense peaks indicated the crystalline nature and the face centered cubic structure of the gold nanoparticles. The average crystallite size of the AuNPs was 14.93[Formula: see text]nm. Field emission scanning electron microscope (FESEM) was used to study the morphology of the AuNPs. AuNPs exhibited a spherical shape with diameters ranging 13–53[Formula: see text]nm. The synthesized stable gold nanoparticles showed more significant anticancer activity against MCF-7 and CAL-51 cells after 48[Formula: see text]h.
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Affiliation(s)
- Neran Ali Thamer
- Department of Molecular Biology, Iraqi Center for Cancer and Medical Genetics Research, Mustansiriyah University, Baghdad, Iraq
| | - Ban. H. Adil
- Department of Physics, College of Science for Women, University of Baghdad, Iraq
| | - A. S. Obaid
- Department of Physics, College of Science University Of Anbar, Ramadi 30001, Iraq
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Green synthesis of metallic nanoparticles as effective alternatives to treat antibiotics resistant bacterial infections: A review. ACTA ACUST UNITED AC 2020; 25:e00427. [PMID: 32055457 PMCID: PMC7005563 DOI: 10.1016/j.btre.2020.e00427] [Citation(s) in RCA: 158] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/19/2020] [Accepted: 01/26/2020] [Indexed: 02/07/2023]
Abstract
Recent approaches for green synthesis of metallic nanoparticles were discussed. The antibacterial activities of various metallic nanoparticles were mentioned. The different modes and mechanisms of antibacterial property were deciphered.
Due to development of bacterial resistance to the conventional antibiotics, the treatment of bacterial infections has become a major issue of concern. The unprescribed and uncontrolled use of antibiotics has lead to the rapid development of antibiotic resistance in bacterial strains. Therefore, the development of novel and potent bactericidal agents is of great clinical importance. Interestingly, metallic nanoparticles (NPs) have been proven to be promising alternative to antibiotics. NPs interact with the important cellular organelles and biomolecules like DNA, enzymes, ribosomes, and lysosomes that can affect cell membrane permeability, oxidative stress, gene expression, protein activation, and enzyme activation. Since, NPs target multiple biomolecules concurrently; it becomes very difficult for bacteria to develop resistance against them. Currently, there are different physical and chemical methods utilized for NPs synthesis. However, most of these processes are costly and potentially hazardous for the living organisms and environment. Therefore, there is a need to develop an eco-friendly and cost-effective method of synthesis. Recently, the ‘green synthesis’ approaches are gaining a lot of attention. It is demonstrated that living organisms like bacteria, yeast, fungi, and plant cells can reduce inorganic metal ions into metal NPs by their cellular metabolites. Both the yield and stability of biogenic NPs are quite satisfactory. In the current article, we have addressed the green synthesis of various metal NPs reported till date and highlighted their different modes and mechanisms of antibacterial properties. It is highly anticipated that biogenic metallic NPs could be viable and economical alternatives for treating drug resistant bacterial infections in near future.
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Biswas A, Vanlalveni C, Adhikari PP, Lalfakzuala R, Rokhum L. Green biosynthesis, characterisation and antimicrobial activities of silver nanoparticles using fruit extract of Solanum viarum. IET Nanobiotechnol 2018; 12:933-938. [PMID: 30247133 PMCID: PMC8676561 DOI: 10.1049/iet-nbt.2018.0050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/09/2018] [Accepted: 04/23/2018] [Indexed: 11/09/2023] Open
Abstract
Green synthesis of nanoparticles is considered an efficient method when compared with chemical and physical methods because of its bulk production, eco-friendliness and low cost norms. The present study reports, for the first time, green synthesis of silver nanoparticles (AgNPs) at room temperature using Solanum viarum fruit extract. The visual appearance of brownish colour with an absorption band at 450 nm, as detected by ultraviolet-visible spectrophotometer analysis, confirmed the formation of AgNPs. X-ray diffraction confirmed the AgNPs to be crystalline with a face-centred lattice. The transmission electron microscopy-energy dispersive X-ray spectroscopy image showed the AgNPs are poly-dispersed and are mostly spherical and oval in shape with particle size ranging from 2 to 40 nm. Furthermore, Fourier transform-infrared spectra of the synthesised AgNPs confirmed the presence of phytoconstituents as a capping agent. The antimicrobial activity study showed that the AgNPs exhibited high microbial activity against Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus susp. aureus, Aspergillus niger, and Candida albicans. The highest antimicrobial activity of AgNPs synthesised by S. viarum fruit extract was observed in P. aeruginosa, S. aureus susp. aureus and C. albicans with zone of inhibition, 26.67 mm.
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Affiliation(s)
- Aayushi Biswas
- Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India
| | - Chhangte Vanlalveni
- Department of Botany, Mizoram University, Aizawl Tanhril 796001, Mizoram, India
| | | | - Ralte Lalfakzuala
- Department of Botany, Mizoram University, Aizawl Tanhril 796001, Mizoram, India
| | - Lalthazuala Rokhum
- Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India.
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San KA, Shon YS. Synthesis of Alkanethiolate-Capped Metal Nanoparticles Using Alkyl Thiosulfate Ligand Precursors: A Method to Generate Promising Reagents for Selective Catalysis. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E346. [PMID: 29783714 PMCID: PMC5977360 DOI: 10.3390/nano8050346] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/15/2018] [Accepted: 05/15/2018] [Indexed: 12/27/2022]
Abstract
Evaluation of metal nanoparticle catalysts functionalized with well-defined thiolate ligands can be potentially important because such systems can provide a spatial control in the reactivity and selectivity of catalysts. A synthetic method utilizing Bunte salts (sodium S-alkylthiosulfates) allows the formation of metal nanoparticles (Au, Ag, Pd, Pt, and Ir) capped with alkanethiolate ligands. The catalysis studies on Pd nanoparticles show a strong correlation between the surface ligand structure/composition and the catalytic activity and selectivity for the hydrogenation/isomerization of alkenes, dienes, trienes, and allylic alcohols. The high selectivity of Pd nanoparticles is driven by the controlled electronic properties of the Pd surface limiting the formation of Pd⁻alkene adducts (or intermediates) necessary for (additional) hydrogenation. The synthesis of water soluble Pd nanoparticles using ω-carboxylate-S-alkanethiosulfate salts is successfully achieved and these Pd nanoparticles are examined for the hydrogenation of various unsaturated compounds in both homogeneous and heterogeneous environments. Alkanethiolate-capped Pt nanoparticles are also successfully synthesized and further investigated for the hydrogenation of various alkynes to understand their geometric and electronic surface properties. The high catalytic activity of activated terminal alkynes, but the significantly low activity of internal alkynes and unactivated terminal alkynes, are observed for Pt nanoparticles.
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Affiliation(s)
- Khin Aye San
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, USA.
| | - Young-Seok Shon
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, USA.
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Shetti NP, Nayak DS, Kuchinad GT, Naik RR. Electrochemical behavior of thiosalicylic acid at γ-Fe2O3 nanoparticles and clay composite carbon electrode. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.170] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Emmanuel R, Saravanan M, Ovais M, Padmavathy S, Shinwari ZK, Prakash P. Antimicrobial efficacy of drug blended biosynthesized colloidal gold nanoparticles from Justicia glauca against oral pathogens: A nanoantibiotic approach. Microb Pathog 2017; 113:295-302. [DOI: 10.1016/j.micpath.2017.10.055] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 11/28/2022]
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Cochis A, Ferraris S, Sorrentino R, Azzimonti B, Novara C, Geobaldo F, Truffa Giachet F, Vineis C, Varesano A, Sayed Abdelgeliel A, Spriano S, Rimondini L. Silver-doped keratin nanofibers preserve a titanium surface from biofilm contamination and favor soft-tissue healing. J Mater Chem B 2017; 5:8366-8377. [PMID: 32264505 DOI: 10.1039/c7tb01965c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Peri-implantitis is a severe condition affecting the success of transmucosal dental implants: tissue healing is severely limited by the inflammatory processes that come about to control homeostasis in the surrounding tissues. The main cause of peri-implantitis is bacterial biofilm infection; gingival fibroblasts play a pivotal role in regulating the inflammatory cascades. A new technology aimed at preventing bacterial colonization of titanium (Ti) implants, and enhancing the spread of gingival fibroblasts, is presented. Using electro-spinning, mirror-polished Ti disks were uniformly coated with keratin fibers obtained from discarded wool via sulfitolysis. The keratin-coated surfaces were then doped with silver (Ag) to introduce antibacterial properties, using different concentrations of silver nitrate as a precursor (0.01, 0.05 and 0.1 M). The resulting specimens were characterized in terms of morphology and chemical composition by FESEM, FTIR and XPS, revealing silver concentrations between 1.7 and 1.9%. Silver release into the medium was evaluated in the presence of cells (α-MEM) or bacteria (LB) by ICP; release was 0.2-1.4 mg l-1 for α-MEM, and 10-40 mg l-1 for LB. The antibacterial properties of the Ag-doped specimens were tested against a multidrug-resistant Staphylococcus aureus biofilm through morphology (FESEM) and metabolic assay (XTT); reduction in viability was significant (p < 0.05; >80% reduction within 72 h). Lastly, the cytocompatibility of the specimens was confirmed using human primary gingival fibroblasts, whose viability, spread and matrix deposition were found to be comparable to those of untreated Ti polished controls (p > 0.05). Thus, Ag surface enrichment was effective in reducing viability and maturation of S. aureus biofilm, without compromising human cell viability. Moreover, cell spread was found to be very sensitive to keratin fiber stimulation. The strategy thus appears to be very promising to introduce surface features in line with the main requirements for transmucosal dental implants.
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Affiliation(s)
- Andrea Cochis
- Department of Health Sciences, Università del Piemonte Orientale UPO, via Solaroli 17, 28100 Novara (NO), Italy.
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Effect of Gamma-irradiation on biosynthesized gold nanoparticles using Chenopodium murale leaf extract. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2015.10.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Elemike EE, Fayemi OE, Ekennia AC, Onwudiwe DC, Ebenso EE. Silver Nanoparticles Mediated by Costus afer Leaf Extract: Synthesis, Antibacterial, Antioxidant and Electrochemical Properties. Molecules 2017; 22:E701. [PMID: 28468278 PMCID: PMC6154536 DOI: 10.3390/molecules22050701] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/12/2017] [Accepted: 04/20/2017] [Indexed: 12/30/2022] Open
Abstract
Synthesis of metallic and semiconductor nanoparticles through physical and chemical routes has been extensively reported. However, green synthesized metal nanoparticles are currently in the limelight due to the simplicity, cost-effectiveness and eco-friendliness of their synthesis. This study explored the use of aqueous leaf extract of Costus afer in the synthesis of silver nanoparticles (CA-AgNPs). The optical and structural properties of the resulting silver nanoparticles were studied using UV-visible spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infra-red spectrophotometer (FTIR). TEM images of the silver nanoparticles confirmed the existence of monodispersed spherical nanoparticles with a mean size of 20 nm. The FTIR spectra affirmed the presence of phytochemicals from the Costus afer leaf extract on the surface of the silver nanoparticles. The electrochemical characterization of a CA-AgNPs/multiwalled carbon nanotubes (MWCNT)-modified electrode was carried out to confirm the charge transfer properties of the nanocomposites. The comparative study showed that the CA-AgNPs/MWCNT-modified electrode demonstrated faster charge transport behaviour. The anodic current density of the electrodes in Fe(CN)₆]4-/[Fe(CN)₆]3- redox probe follows the order: GCE/CA-Ag/MWCNT (550 mA/cm²) > GCE/MWCNT (270 mA/cm²) > GCE (80 mA/cm²) > GCE/CA-Ag (7.93 mA/cm²). The silver nanoparticles were evaluated for their antibacterial properties against Gram negative (Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa) and Gram positive (Bacillus subtilis and Staphylococcus aureus) pathogens. The nanoparticles exhibited better inhibition of the bacterial strains compared to the precursors (leaf extract of Costus afer and silver nitrate). Furthermore, the ability of the nanoparticles to scavenge DPPH radicals at different concentrations was studied using the DPPH radical scavenging assay and compared to that of the leaf extract and ascorbic acid. The nanoparticles were better DPPH scavengers compared to the leaf extract and their antioxidant properties compared favorably the antioxidant results of ascorbic acid. The green approach to nanoparticles synthesis carried out in this research work is simple, non-polluting, inexpensive and non-hazardous.
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Affiliation(s)
- Elias E Elemike
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
- Department of Chemistry, School of Mathematics and Physical Sciences, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
- Department of Chemistry, College of Science, Federal University of Petroleum Resources, P.M.B 1221 Effurun, Delta State, Nigeria.
| | - Omolola E Fayemi
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
- Department of Chemistry, School of Mathematics and Physical Sciences, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Anthony C Ekennia
- Department of Chemistry, Federal University Ndufu-Alike Ikwo (FUNAI), P.M.B 1010 Abakiliki, Ebonyi State, Nigeria.
| | - Damian C Onwudiwe
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
- Department of Chemistry, School of Mathematics and Physical Sciences, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
| | - Eno E Ebenso
- Material Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
- Department of Chemistry, School of Mathematics and Physical Sciences, Faculty of Agriculture, Science and Technology, North-West University, Mafikeng Campus, Private Bag X2046, Mmabatho 2735, South Africa.
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17
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Das M, Mondal A, Patowary K, Malipeddi H. Biosynthesis of AgNPs using aqueous leaf extract of Ipomoea eriocarpa and their anti-inflammatory effect on carrageenan-induced paw edema in male Wistar rats. IET Nanobiotechnol 2017; 11:225-229. [PMID: 28476977 PMCID: PMC8676364 DOI: 10.1049/iet-nbt.2016.0034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 08/02/2016] [Accepted: 08/20/2016] [Indexed: 11/09/2023] Open
Abstract
Silver nanoparticles (AgNPs) were synthesised from aqueous Ag nitrate through a simple, competent and eco-friendly method using the leaf extract of Ipomoea eriocarpa as reducing as well as capping agent. Ultraviolet-visible absorption spectroscopy was used to confirm the formation of AgNPs which displayed the substantiation of surface plasmon bands at 425 nm. The NPs were also characterised using Fourier transformer infrared spectroscopy, X-ray diffraction method, transmission electron microscope and zeta potential. The characterisation study confirmed the formation of AgNPs, their spherical shape and average diameter of 12.85 ± 8.65 nm. Zeta potential value of -20.5 mV suggested that the AgNPs are stable in the suspension. The aqueous extract and the AgNPs were further screened for in vivo anti-inflammatory activity using carrageenan-induced paw edema in male Wistar rats. The study demonstrated that the AgNPs (1 ml kg-1) had a significant (p < 0.05) anti-edemic effect and inhibition was observed from the first hour (21.31 ± 1.34) until the sixth hour (52.67 ± 1.41), when the inhibitory effect was greatest and superior to the aqueous extract and the standard, diclofenac.
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Affiliation(s)
- Moonjit Das
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India
| | - Ashaparna Mondal
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India
| | - Kaustuvmani Patowary
- Environmental Biotechnology Laboratory, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati 781 035, Assam, India
| | - Himaja Malipeddi
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India.
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18
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Mohanta YK, Panda SK, Jayabalan R, Sharma N, Bastia AK, Mohanta TK. Antimicrobial, Antioxidant and Cytotoxic Activity of Silver Nanoparticles Synthesized by Leaf Extract of Erythrina suberosa (Roxb.). Front Mol Biosci 2017; 4:14. [PMID: 28367437 PMCID: PMC5355429 DOI: 10.3389/fmolb.2017.00014] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 03/03/2017] [Indexed: 11/13/2022] Open
Abstract
In this experiment, biosynthesized silver nanoparticles (AgNPs) were synthesized using aqueous leaf extract of Erythrina suberosa (Roxb.). The biosynthesis of silver nanoparticle was continuously followed by UV-vis spectrophotometric analysis. The response of the phytoconstituents resides in E. suberusa during synthesis of stable AgNPs were analyzed by ATR- fourier-transform infrared spectroscopy. Further, the size, charge, and polydispersity nature of AgNPs were studied using dynamic light scattering spectroscopy. The morphology of the nanoparticles was determined by scanning electron microscopy. Current result shows core involvement of plant extracts containing glycosides, flavonoids, and phenolic compounds played a crucial role in the biosynthesis of AgNPs. The antimicrobial activities of silver nanoparticles were evaluated against different pathogenic bacterium and fungi. The antioxidant property was studied by radical scavenging (DPPH) assay and cytotoxic activity was evaluated against A-431 osteosarcoma cell line by MTT assay. The characteristics of the synthesized silver nanoparticles suggest their application as a potential antimicrobial and anticancer agent.
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Affiliation(s)
- Yugal K. Mohanta
- Biochemistry Laboratory, Department of Botany, North Orissa UniversityBaripada, India
| | | | - Rasu Jayabalan
- Department of Life Science, National Institute of TechnologyRourkela, India
| | - Nanaocha Sharma
- Medicinal Plants and Horticulture Resources, Institute of Bioresources and Sustainable DevelopmentImphal, India
| | - Akshaya K. Bastia
- Biochemistry Laboratory, Department of Botany, North Orissa UniversityBaripada, India
| | - Tapan K. Mohanta
- Free major of Natural Sciences, College of Basic Studies, Yeungnam UniversityGyeongsan, South Korea
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19
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Vatandost E, Chekin F, Shahidi Yasaghi SA. Green synthesis of silver nanoparticles by pepper extracts reduction and its electocatalytic and antibacterial activity. RUSS J ELECTROCHEM+ 2016. [DOI: 10.1134/s102319351610013x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Nayak DS, Shetti NP. Voltammetric Response and Determination of an Anti-Inflammatory Drug at a Cationic Surfactant-Modified Glassy Carbon Electrode. J SURFACTANTS DETERG 2016. [DOI: 10.1007/s11743-016-1854-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Velmurugan P, Shim J, Kim H, Lim JM, Kim SA, Seo YS, Kim JW, Kim K, Oh BT. Bio-functionalization of cotton, silk, and leather using different in-situ silver nanoparticle synthesis modules, and their antibacterial properties. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2481-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Sesbania grandiflora leaf extract assisted green synthesis of silver nanoparticles: Antimicrobial activity. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.matpr.2016.04.099] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Madden O, Naughton MD, Moane S, Murray PG. Mycofabrication of common plasmonic colloids, theoretical considerations, mechanism and potential applications. Adv Colloid Interface Sci 2015; 225:37-52. [PMID: 26320607 DOI: 10.1016/j.cis.2015.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/09/2015] [Accepted: 08/10/2015] [Indexed: 01/12/2023]
Abstract
A coupling of the plasmon on the surface of metal nanoparticles with an incident photon enhances a broad range of useful optical phenomena, such as resonant light scattering (RLS), surface plasmon resonance (SPR) or Raman scattering. Due to these unique optical properties plasmonic nanostructures of different sizes and shapes have gained increasing popularity in areas such as cancer diagnosis, photothermal therapy as well as the imaging of living cells, detection of pathogens, biomolecules, metal ions, and the catalysis of various reactions in wet chemistry. This article reviews the current trends in the synthesis of plasmonic nanoparticles, particularly gold (AuNPs) and silver (AgNPs), using fungi as well as the proposed mechanisms for their mycofabrication. We provide an overview of the theoretical concepts of plasmonic nanoparticles which are sensitive electromagnetic responses that determine these nanoparticles applications.
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Affiliation(s)
- Olena Madden
- CHIMERA Research Group, Shannon ABC, Department of Applied Science, Limerick Institute of Technology, Moylish Park, Limerick, Ireland.
| | - Michael Daragh Naughton
- Bio-inspired Materials and TEMPO Research Groups, Department of Mechanical Engineering, Limerick Institute of Technology, Moylish Park, Limerick, Ireland
| | - Siobhan Moane
- CHIMERA Research Group, Shannon ABC, Department of Applied Science, Limerick Institute of Technology, Moylish Park, Limerick, Ireland
| | - Patrick G Murray
- CHIMERA Research Group, Shannon ABC, Department of Applied Science, Limerick Institute of Technology, Moylish Park, Limerick, Ireland
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Marslin G, Selvakesavan RK, Franklin G, Sarmento B, Dias ACP. Antimicrobial activity of cream incorporated with silver nanoparticles biosynthesized from Withania somnifera. Int J Nanomedicine 2015; 10:5955-63. [PMID: 26445537 PMCID: PMC4590548 DOI: 10.2147/ijn.s81271] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
We report on the antimicrobial activity of a cream formulation of silver nanoparticles (AgNPs), biosynthesized using Withania somnifera extract. Aqueous extracts of leaves promoted efficient green synthesis of AgNPs compared to fruits and root extracts of W. somnifera. Biosynthesized AgNPs were characterized for their size and shape by physical-chemical techniques such as UV-visible spectroscopy, laser Doppler anemometry, transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray diffraction, and X-ray energy dispersive spectroscopy. After confirming the antimicrobial potential of AgNPs, they were incorporated into a cream. Cream formulations of AgNPs and AgNO3 were prepared and compared for their antimicrobial activity against human pathogens (Staphylococcus aureus, Pseudomonas aeruginosa, Proteus vulgaris, Escherichia coli, and Candida albicans) and a plant pathogen (Agrobacterium tumefaciens). Our results show that AgNP creams possess significantly higher antimicrobial activity against the tested organisms.
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Affiliation(s)
- Gregory Marslin
- Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB-UM), AgroBioPlant Group, Department of Biology, University of Minho, Braga, Portugal
| | - Rajendran K Selvakesavan
- Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB-UM), AgroBioPlant Group, Department of Biology, University of Minho, Braga, Portugal
| | - Gregory Franklin
- Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB-UM), AgroBioPlant Group, Department of Biology, University of Minho, Braga, Portugal
| | - Bruno Sarmento
- Instituto de Engenharia Biomédica (INEB), University of Porto, Porto, Portugal ; CESPU, Instituto Universitário de Ciências da Saúde, Gandra, Portugal
| | - Alberto C P Dias
- Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB-UM), AgroBioPlant Group, Department of Biology, University of Minho, Braga, Portugal
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25
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Reddy GB, Ramakrishna D, Madhusudhan A, Ayodhya D, Venkatesham M, Veerabhadram G. Catalytic Reduction of p-Nitrophenol and Hexacyanoferrate (III) by Borohydride Using Green Synthesized Gold Nanoparticles. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400513] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Mata R, Nakkala JR, Sadras SR. Biogenic silver nanoparticles from Abutilon indicum: their antioxidant, antibacterial and cytotoxic effects in vitro. Colloids Surf B Biointerfaces 2015; 128:276-286. [PMID: 25701118 DOI: 10.1016/j.colsurfb.2015.01.052] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 01/09/2015] [Accepted: 01/29/2015] [Indexed: 12/16/2022]
Abstract
Green synthesis of silver nanoparticles using biological entities is gaining interest because of their potential applications in nano-medicine. Herein, we report the biological synthesis of Abutilon indicum silver nanoparticles (AIAgNPs) using aqueous Abutilon indicum leaf extract (AILE) and evaluation of their biological applications. TEM analysis revealed that the spherical biogenic AIAgNPs were found to be between 5 and 25 nm in size. The bioactive phyto-constituents such are condensed tannins of AILE were found to play a key role in the reduction and capping of AIAgNPs. The biological properties of AIAgNPs were premeditated as free radical scavenging activity, antibacterial effect and anti-proliferative activity. AIAgNPs were found to exhibit good free radical scavenging activities and the intense zone of inhibition displayed by them in six different pathogenic species indicate the potential antibacterial effect. Further, AIAgNPs showed a dose dependant anti-proliferative effect against COLO 205 (human colon cancer) and MDCK (normal) cells with an IC50 of 3 and 4 μg/mL and 100 and 75 μg/mL, respectively after 24 and 48 h. The morphological changes, chromatin condensation and membrane potential loss induced by AIAgNPs were evidenced by AO/EB and AnnexinV-Cy3 staining. The mitochondrial membrane potential (MMP) loss and G1/S transition cell cycle arrest in COLO 205 cells was evidenced in rhodamine123 staining and FACS analysis. The high levels of ROS as shown in DCF-DA staining could have played a major role in DNA fragmentation and eventually lead to apoptosis. The mode of action through the induction apoptosis by AIAgNPs in COLO 205 cells is exciting with promising application of nano-materials in biomedical research.
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Affiliation(s)
- Rani Mata
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Jayachandra Reddy Nakkala
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Sudha Rani Sadras
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Pondicherry University, Puducherry, India.
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27
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Ihsan M, Niaz A, Rahim A, Zaman MI, Arain MB, Sirajuddin, Sharif T, Najeeb M. Biologically synthesized silver nanoparticle-based colorimetric sensor for the selective detection of Zn2+. RSC Adv 2015. [DOI: 10.1039/c5ra17055a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration for the colorimetric detection of Zn2+.
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Affiliation(s)
- Muhammad Ihsan
- Department of Chemistry
- University of Science & Technology
- Bannu
- Pakistan
| | - Abdul Niaz
- Department of Chemistry
- University of Science & Technology
- Bannu
- Pakistan
| | - Abdur Rahim
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM)
- COMSATS Institute of Information Technology
- Lahore
- Pakistan
| | | | | | - Sirajuddin
- National Center of Excellence in Analytical Chemistry
- University of Sindh
- Jamshoro
- Pakistan
| | - Tehmina Sharif
- Department of Chemistry
- University of Science & Technology
- Bannu
- Pakistan
| | - Memoona Najeeb
- Department of Chemistry
- University of Science & Technology
- Bannu
- Pakistan
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28
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Lin YJ, Chen PC, Yuan Z, Ma JY, Chang HT. The isomeric effect of mercaptobenzoic acids on the preparation and fluorescence properties of copper nanoclusters. Chem Commun (Camb) 2015; 51:11983-6. [DOI: 10.1039/c5cc02342d] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Copper nanoclusters (Cu NCs) aggregates prepared from copper nitrate and mercaptobenzoic acid (MBA) isomers show differential optical properties.
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Affiliation(s)
- Yi-Jyun Lin
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Po-Cheng Chen
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Zhiqin Yuan
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Jia-Ying Ma
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Huan-Tsung Chang
- Department of Chemistry
- National Taiwan University
- Taipei 10617
- Taiwan
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29
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Naz SS, Shah MR, Islam NU, Khan A, Nazir S, Qaisar S, Alam SS. Synthesis and bioactivities of silver nanoparticles capped with 5-amino-β-resorcylic acid hydrochloride dihydrate. J Nanobiotechnology 2014; 12:34. [PMID: 25201390 PMCID: PMC4422292 DOI: 10.1186/s12951-014-0034-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/29/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Conjugated and drug loaded silver nanoparticles are getting an increased attention for various biomedical applications. Nanoconjugates showed significant enhancement in biological activity in comparison to free drug molecules. In this perspective, we report the synthesis of bioactive silver capped with 5-Amino-β-resorcylic acid hydrochloride dihydrate (AR). The in vitro antimicrobial (antibacterial, antifungal), enzyme inhibition (xanthine oxidase, urease, carbonic anhydrase, α-chymotrypsin, cholinesterase) and antioxidant activities of the developed nanostructures was investigated before and after conjugation to silver metal. RESULTS The conjugation of AR to silver was confirmed through FTIR, UV-vis and TEM techniques. The amount of AR conjugated with silver was characterized through UV-vis spectroscopy and found to be 9% by weight. The stability of synthesized nanoconjugates against temperature, high salt concentration and pH was found to be good. Nanoconjugates, showed significant synergic enzyme inhibition effect against xanthine and urease enzymes in comparison to standard drugs, pure ligand and silver. CONCLUSIONS Our synthesized nanoconjugate was found be to efficient selective xanthine and urease inhibitors in comparison to Ag and AR. On a per weight basis, our nanoconjugates required less amount of AR (about 11 times) for inhibition of these enzymes.
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Affiliation(s)
- Syeda Sohaila Naz
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Nazar Ul Islam
- Institute of Chemical Sciences, University of Peshawar, Peshawar, 25120, Pakistan. .,Sarhad University of Science and Information Technology, Peshawar, 2500, Pakistan.
| | - Ajmal Khan
- H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.
| | - Samina Nazir
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Sara Qaisar
- Nanoscience and Catalysis Division, National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, 44000, Pakistan.
| | - Syed Sartaj Alam
- Department of Plant Pathology, Khyber Pakhtunkhwa Agricultural University Peshawar, Peshawar, Pakistan.
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30
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Seisenbaeva GA, Kessler VG. Precursor directed synthesis--"molecular" mechanisms in the Soft Chemistry approaches and their use for template-free synthesis of metal, metal oxide and metal chalcogenide nanoparticles and nanostructures. NANOSCALE 2014; 6:6229-44. [PMID: 24681614 DOI: 10.1039/c3nr06336d] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This review provides an insight into the common reaction mechanisms in Soft Chemistry processes involved in nucleation, growth and aggregation of metal, metal oxide and chalcogenide nanoparticles starting from metal-organic precursors such as metal alkoxides, beta-diketonates, carboxylates and their chalcogene analogues and demonstrates how mastering the precursor chemistry permits us to control the chemical and phase composition, crystallinity, morphology, porosity and surface characteristics of produced nanomaterials.
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Affiliation(s)
- Gulaim A Seisenbaeva
- Department of Chemistry and Biotechnology, Biocenter, Swedish University of Agricultural Sciences (SLU), Box 7015, SE-75007, Uppsala, Sweden.
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31
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Chekin F, Bagheri S, Abd Hamid SB. Green Synthesis of Ag Nanoparticles by Callicarpa Maingayi: Characterization and Its Application with Graphene Oxide for Enzymeless Hydrogen Peroxide Detection. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201300463] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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A comparative in situ TEM and UV–visible spectroscopic study of the thermal evolution of Ag species dispersed on Al2O3 and NaX zeolite supports. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.06.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Tripathi R, Kumar N, Shrivastav A, Singh P, Shrivastav B. Catalytic activity of biogenic silver nanoparticles synthesized by Ficus panda leaf extract. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2013.06.018] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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34
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Narayanan KB, Park HH, Sakthivel N. Extracellular synthesis of mycogenic silver nanoparticles by Cylindrocladium floridanum and its homogeneous catalytic degradation of 4-nitrophenol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:485-490. [PMID: 23973598 DOI: 10.1016/j.saa.2013.07.066] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 07/17/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
Green synthesis of extracellular mycogenic silver nanoparticles using the fungus, Cylindrocladium floridanum is reported. The synthesized mycogenic silver nanoparticles were characterized using UV-Vis absorption spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM) techniques. The nanoparticles exhibit fcc structure with Bragg's reflections of (111), (200), (220) and (311) was evidenced by XRD pattern, high-resolution TEM lattice fringes and circular rings in selected-area electron diffraction (SAED) pattern. The morphology of nanoparticles was roughly spherical in shape with an average size of ca. 25 nm. From FTIR spectrum, it was found that the biomolecules with amide I and II band were involved in the stabilization of nanoparticles. These mycogenic silver nanoparticles exhibited the homogeneous catalytic potential in the reduction of pollutant, 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using sodium borohydride, which followed a pseudo-first-order kinetic model. Thus, the synthesis of metal nanoparticles using sustainable microbial approach opens up possibilities in the usage of mycogenic metal nanoparticles as catalysts in various chemical reactions.
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Affiliation(s)
- Kannan Badri Narayanan
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, Puducherry 605 014, India; School of Biotechnology, Graduate School of Biochemistry, and Research Institute of Protein Sensor, Yeungnam University, Gyeongsan 712 749, South Korea
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35
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Green Synthesis of Silver Nanoparticles by Plumbago indica and Its Antitumor Activity Against Dalton's Lymphoma Ascites Model. BIONANOSCIENCE 2013. [DOI: 10.1007/s12668-013-0102-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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36
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Arunachalam KD, Annamalai SK, Hari S. One-step green synthesis and characterization of leaf extract-mediated biocompatible silver and gold nanoparticles from Memecylon umbellatum. Int J Nanomedicine 2013; 8:1307-15. [PMID: 23569372 PMCID: PMC3615924 DOI: 10.2147/ijn.s36670] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In this experiment, green-synthesized silver and gold nanoparticles were produced rapidly by treating silver and gold ions with an extract of Memecylon umbellatum leaf. The reaction process was simple and easy to handle, and was monitored using ultraviolet-visible spectroscopy. The effect of the phytochemicals present in M. umbellatum, including saponins, phenolic compounds, phytosterols, and quinones, on formation of stable silver and gold nanoparticles was investigated by Fourier-transform infrared spectroscopy. The morphology and crystalline phase of the nanoparticles were determined by transmission electron microscopy and energy-dispersive x-ray spectroscopy. The results indicate that the saponins, phytosterols, and phenolic compounds present in the plant extract play a major role in formation of silver and gold nanoparticles in their respective ions in solution. The characteristics of the nanoparticles formed suggest application of silver and gold nanoparticles as chemical sensors in the future. Given the simple and eco-friendly approach for synthesis, these nanoparticles could easily be commercialized for large-scale production.
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Affiliation(s)
- Kantha D Arunachalam
- Center for Environmental Nuclear Research, Directorate of Research, SRM University, Chennai, Tamil Nadu, India.
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37
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Balavigneswaran CK, Sujin Jeba Kumar T, Moses Packiaraj R, Prakash S. Rapid detection of Cr(VI) by AgNPs probe produced by Anacardium occidentale fresh leaf extracts. APPLIED NANOSCIENCE 2013. [DOI: 10.1007/s13204-013-0203-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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38
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Das J, Paul Das M, Velusamy P. Sesbania grandiflora leaf extract mediated green synthesis of antibacterial silver nanoparticles against selected human pathogens. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 104:265-270. [PMID: 23270884 DOI: 10.1016/j.saa.2012.11.075] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 11/07/2012] [Accepted: 11/23/2012] [Indexed: 06/01/2023]
Abstract
Simple, effective and rapid approach for the green synthesis of silver nanoparticles (AgNPs) using leaf extract of Sesbania grandiflora and their in vitro antibacterial activity against selected human pathogens has been demonstrated in the study. Various instrumental techniques were adopted to characterize the synthesized AgNPs viz. UV-Vis, FTIR, XRD, TEM, EDX and AFM. Surface Plasmon spectra for AgNPs are centered at 422 nm with dark brown color. The synthesized AgNPs were found to be spherical in shape with size in the range of 10-25 nm. The presence of water soluble proteins in the leaf extract was identified by FTIR which were found to be responsible for the reduction of silver ions (Ag(+)) to AgNPs. Moreover, the synthesized AgNPs showed potent antibacterial activity against multi-drug resistant (MDR) bacteria such as Salmonella enterica and Staphylococcus aureus.
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Affiliation(s)
- J Das
- Department of Biotechnology, School of Bioengineering, SRM University, Kattankulathur, Chennai 603 203, Tamil Nadu, India
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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: 12] [Impact Index Per Article: 1.1] [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.
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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.
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Mohan Kumar K, Mandal BK, Siva Kumar K, Sreedhara Reddy P, Sreedhar B. Biobased green method to synthesise palladium and iron nanoparticles using Terminalia chebula aqueous extract. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 102:128-33. [PMID: 23220527 DOI: 10.1016/j.saa.2012.10.015] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 10/05/2012] [Accepted: 10/10/2012] [Indexed: 05/24/2023]
Abstract
There are many methods to synthesise metal and metal oxide nanoparticles (NPs) using different reducing agents which are hazardous in nature. Although some researchers have used biobased materials for synthesis of these NPs, further research is needed in this area. To explore the scope of bio-extract for the synthesis of transition metal NPs, the present paper synthesises metal NPs replacing hazardous traditional reducing agents. This paper reports the synthesis of palladium and iron NPs, using aqueous extract of Terminalia chebula fruit. Reduction potential of aqueous extract of polyphenolic rich T. chebula was 0.63V vs. SCE by cyclic voltammetry study which makes it a good green reducing agent. This helps to reduce palladium and iron salts to palladium and iron NPs respectively. Powder X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) analyses revealed that amorphous iron NPs were within the size less than 80 nm and cubic palladium NPs were within the size less than 100 nm. The synthesised nanomaterials were remarkably stable for a long period and synthesis of stable metal NPs will need to be explored using biobased materials as reducing agents.
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Affiliation(s)
- Kesarla Mohan Kumar
- Trace Elements Speciation Research Laboratory, Environmental and Analytical Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632 014, India
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Adegboyega NF, Sharma VK, Siskova K, Zbořil R, Sohn M, Schultz BJ, Banerjee S. Interactions of aqueous Ag+ with fulvic acids: mechanisms of silver nanoparticle formation and investigation of stability. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:757-764. [PMID: 23237319 DOI: 10.1021/es302305f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study investigated the possible natural formation of silver nanoparticles (AgNPs) in Ag(+)-fulvic acid (FA) solutions under various environmentally relevant conditions (temperature, pH, and UV light). Increase in temperature (24-90 °C) and pH (6.1-9.0) of Ag(+)-Suwannee River fulvic acid (SRFA) solutions accelerated the appearance of the characteristic surface plasmon resonance (SPR) of AgNPs. The rate of AgNP formation via reduction of Ag(+) in the presence of different FAs (SRFA, Pahokee Peat fulvic acid, PPFA, Nordic lake fulvic acid, NLFA) and Suwannee River humic acid (SRHA) followed the order NLFA > SRHA > PPFA > SRFA. This order was found to be related to the free radical content of the acids, which was consistent with the proposed mechanism. The same order of AgNP growth was seen upon UV light illumination of Ag(+)-FA and Ag(+)-HA mixtures in moderately hard reconstituted water (MHRW). Stability studies of AgNPs, formed from the interactions of Ag(+)-SRFA, over a period of several months showed that these AgNPs were highly stable with SPR peak reductions of only ~15%. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements revealed bimodal particle size distributions of aged AgNPs. The stable AgNPs formed through the reduction of Ag(+) by fulvic and humic acid fractions of natural organic matter in the environment may be transported over significant distances and might also influence the overall bioavailability and ecotoxicity of AgNPs.
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Affiliation(s)
- Nathaniel F Adegboyega
- Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, USA
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Cytosine: para-sulphonato-calix[4]arene assemblies: in solution, in the solid-state and on the surface of hybrid silver nanoparticles. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0235-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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43
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Bio-synthesis and applications of silver nanoparticles onto cotton fabrics. Carbohydr Polym 2012; 90:915-20. [DOI: 10.1016/j.carbpol.2012.06.020] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 05/22/2012] [Accepted: 06/10/2012] [Indexed: 11/20/2022]
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Mollick MMR, Bhowmick B, Maity D, Mondal D, Bain MK, Bankura K, Sarkar J, Rana D, Acharya K, Chattopadhyay D. Green Synthesis of Silver Nanoparticles UsingPaederia foetida L.Leaf Extract and Assessment of Their Antimicrobial Activities. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/19430892.2012.706103] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Uzayisenga V, Lin XD, Li LM, Anema JR, Yang ZL, Huang YF, Lin HX, Li SB, Li JF, Tian ZQ. Synthesis, characterization, and 3D-FDTD simulation of Ag@SiO2 nanoparticles for shell-isolated nanoparticle-enhanced Raman spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9140-9146. [PMID: 22506587 DOI: 10.1021/la3005536] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Au-seed Ag-growth nanoparticles of controllable diameter (50-100 nm), and having an ultrathin SiO(2) shell of controllable thickness (2-3 nm), were prepared for shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). Their morphological, optical, and material properties were characterized; and their potential for use as a versatile Raman signal amplifier was investigated experimentally using pyridine as a probe molecule and theoretically by the three-dimensional finite-difference time-domain (3D-FDTD) method. We show that a SiO(2) shell as thin as 2 nm can be synthesized pinhole-free on the Ag surface of a nanoparticle, which then becomes the core. The dielectric SiO(2) shell serves to isolate the Raman-signal enhancing core and prevent it from interfering with the system under study. The SiO(2) shell also hinders oxidation of the Ag surface and nanoparticle aggregation. It significantly improves the stability and reproducibility of surface-enhanced Raman scattering (SERS) signal intensity, which is essential for SERS applications. Our 3D-FDTD simulations show that Ag-core SHINERS nanoparticles yield at least 2 orders of magnitude greater enhancement than Au-core ones when excited with green light on a smooth Ag surface, and thus add to the versatility of our SHINERS method.
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Affiliation(s)
- Viviane Uzayisenga
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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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]
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Mechanistic aspects in the biogenic synthesis of extracellular metal nanoparticles by peptides, bacteria, fungi, and plants. Appl Microbiol Biotechnol 2011; 90:1609-24. [DOI: 10.1007/s00253-011-3249-8] [Citation(s) in RCA: 249] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 03/11/2011] [Accepted: 03/12/2011] [Indexed: 10/18/2022]
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48
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Metal nanoparticles with high catalytic activity in degradation of methyl orange: An electron relay effect. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2010.12.001] [Citation(s) in RCA: 214] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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49
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Philip D, Unni C, Aromal SA, Vidhu VK. Murraya Koenigii leaf-assisted rapid green synthesis of silver and gold nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:899-904. [PMID: 21215687 DOI: 10.1016/j.saa.2010.12.060] [Citation(s) in RCA: 209] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Revised: 12/09/2010] [Accepted: 12/14/2010] [Indexed: 05/05/2023]
Abstract
A facile bottom-up 'green' and rapid synthetic route using Murraya Koenigii leaf extract as reducing and stabilizing agent produced silver nanoparticles at ambient conditions and gold nanoparticles at 373 K. The nanoparticles were characterized using UV-vis, transmission electron microscopy (TEM), X-ray diffraction (XRD) and FTIR analysis. This method allows the synthesis of well-dispersed silver and gold nanoparticles having size ∼10 nm and ∼20 nm, respectively. Silver nanoparticles with size ∼10 nm having symmetric SPR band centered at 411 nm is obtained within 5 min of addition of the extract to the solution of AgNO3 at room temperature. Nearly spherical gold nanoparticles having size ∼20 nm with SPR at 532 nm is obtained on adding the leaf extract to the boiling solution of HAuCl4. Crystallinity of the nanoparticles is confirmed from the high-resolution TEM images, selected area electron diffraction (SAED) and XRD patterns. From the FTIR spectra it is found that the biomolecules responsible for capping are different in gold and silver nanoparticles. A comparison of the present work with the author's earlier reports on biosynthesis is also included.
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Affiliation(s)
- Daizy Philip
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695 015, India.
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Sanghi R, Verma P, Puri S. Enzymatic Formation of Gold Nanoparticles Using <i>Phanerochaete Chrysosporium</i>. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/aces.2011.13023] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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