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Benign nano-assemblages of silver induced by β galactosidase with augmented antimicrobial and industrial dye degeneration potential. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:570-578. [DOI: 10.1016/j.msec.2018.05.077] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 05/04/2018] [Accepted: 05/26/2018] [Indexed: 11/23/2022]
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52
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Khan I, Sivasankaran N, Nagarjuna R, Ganesan R, Dutta JR. Extracellular probiotic lipase capped silver nanoparticles as highly efficient broad spectrum antimicrobial agents. RSC Adv 2018; 8:31358-31365. [PMID: 35548221 PMCID: PMC9085599 DOI: 10.1039/c8ra05999c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 08/24/2018] [Indexed: 11/21/2022] Open
Abstract
The microbial resistance to different drugs due to excessive usage of antibiotics in various domains has become a serious environmental threat in recent years. This gave the impetus to researchers to find alternatives that do not lead to multi-drug resistant microbes. In this backdrop, silver nanoparticles (Ag NPs) have become a popular choice due to their potential broad spectrum of antimicrobial attributes. Recent literature caution that about 400 metric tons of Ag NPs are synthesized annually all over the world that could cause environmental hazards when used at higher concentrations than the toxicity limit. However, most of the literature reports use higher concentrations of Ag NPs and exposure to such concentrations may lead to environmental and health hazards. In this study, a series of Ag NPs have been synthesized using a lipase derived from a probiotic source Lactobacillus plantarum as the stabilizing agent. The Ag NPs synthesized through different combinations of lipase and AgNO3 are characterized using various techniques such as UV-visible spectroscopy, FT-IR, ED-XRF, DLS and HR-TEM. The lipase capped Ag NPs have been studied for their antimicrobial activity against representative microbes such as Pseudomonas putida, Staphylococcus aureus and Aspergillus niger. Our initial results reveal that the lipase capped Ag NPs possess high potential towards broad spectrum antimicrobial applications at concentrations much lower than the toxicity limit of the standard model, zebra fish.
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Affiliation(s)
- Imran Khan
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus Jawahar Nagar, Kapra Mandal Hyderabad - 500078 Telangana India +91 40 6630 3542
| | - Nivetha Sivasankaran
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus Jawahar Nagar, Kapra Mandal Hyderabad - 500078 Telangana India +91 40 6630 3542
| | - Ravikiran Nagarjuna
- Department of Chemistry, BITS Pilani, Hyderabad Campus Jawahar Nagar, Kapra Mandal Hyderabad - 500078 Telangana India +91 40 6630 3602
| | - Ramakrishnan Ganesan
- Department of Chemistry, BITS Pilani, Hyderabad Campus Jawahar Nagar, Kapra Mandal Hyderabad - 500078 Telangana India +91 40 6630 3602
| | - Jayati Ray Dutta
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus Jawahar Nagar, Kapra Mandal Hyderabad - 500078 Telangana India +91 40 6630 3542
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Qurat-ul-ain, Sarfraz RA, Nadeem R, Jamil A. Assessment of antimicrobial activity of phytofabricated silver particles. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2018. [DOI: 10.1680/jbibn.18.00009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Nanobiotechnology is emerging as a field of nanotechnology and applied biological science. Nanoparticles are produced by physical, chemical and biological methods; but biological methods are relatively cost effective, non-toxic, simple and eco-friendly. The present study was carried out focusing on the antimicrobial activities of phytofabricated silver nanoparticles of Curcuma longa, Eucalyptus camaldulensis, Syzygium cumini, Viola betonicifolia and Mangifera indica. The biogenic fabrications of silver nanoparticles were characterized by ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The UV–Vis spectra of the different plant extracts in aqueous medium containing silver nanoparticles showed peaks in the visible region. FT-IR spectroscopy showed that the nanoparticles are capped with the chemical constituents of plant extracts. SEM was used to estimate the morphology of the nanoparticles capped with plant extracts. The antimicrobial activities of the phytofabricated silver nanoparticles were studied against Escherichia coli and Bacillus subtilis. Maximum antibacterial activity was observed for phytofabricated silver nanoparticles of S. cumini against E. coli (32 ± 0·28 mm) and B. subtilis (26 ± 0·288 mm) and E. camaldulensis against E. coli (31·33 ± 0·011 mm) and B. subtilis (34 ± 0·064 mm) compared to simple plant extracts of S. cumini against E. coli (25 ± 0·5 mm) and B. subtilis (24·66 ± 0·01 mm) and E. camaldulensis against E. coli (36 ± 0·450 mm) and B. subtilis (32 ± 0·38 mm). The selected biomimetic silver nanoparticles and their fractions in different solvents show maximum antimicrobial potential compared with plain plant extracts and their fractions.
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Affiliation(s)
- Qurat-ul-ain
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Raja Adil Sarfraz
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
- Central Hitech Lab, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Raziya Nadeem
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Amer Jamil
- Department of Biochemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
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Qurat-Ul-Ain, Sarfraz RA, Qayyum A. Mechanism of action of bio-inspired nanosilver particles. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2018. [DOI: 10.1680/jbibn.17.00026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Nanotechnology is gaining prime importance in the present era due to modeling of metals in nanoparticles (NPs) by biological methods, but nowadays, researchers are designing the exact mode of action of nanomaterials on plants. NPs are fabricated by different physical and chemical methods, but biological methods are preferred due to their simplicity and non-toxic nature. The current development of biomimetic NP synthesis is a more reliable, economically favorable and eco-friendly method for the treatment of different diseases. NPs fabricated by traditional methods have shown a lot of demerits, so the green route to the formation of metallic NPs is advantageous compared to the use of microbes. Secondary metabolites in the plant have active chemical constituents which can act as capping and reducing agents, thereby enhancing the rate of reduction and stabilizations of NPs. In this review, a major focus is given to biogenic silver NPs’ mechanism of action toward cancer and microbes.
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Affiliation(s)
- Qurat-Ul-Ain
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Raja Adil Sarfraz
- Department of Chemistry and Officer In-charge Central Hi-tech lab, University of Agriculture, Faisalabad, Pakistan
| | - Abdul Qayyum
- Department of Chemistry, College of Science, Shantou University, Guangdong, P.R. China
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Aljabali AAA, Akkam Y, Al Zoubi MS, Al-Batayneh KM, Al-Trad B, Abo Alrob O, Alkilany AM, Benamara M, Evans DJ. Synthesis of Gold Nanoparticles Using Leaf Extract of Ziziphus zizyphus and their Antimicrobial Activity. NANOMATERIALS 2018; 8:nano8030174. [PMID: 29562669 PMCID: PMC5869665 DOI: 10.3390/nano8030174] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 03/14/2018] [Accepted: 03/15/2018] [Indexed: 12/12/2022]
Abstract
(1) Background: There is a growing need for the development of new methods for the synthesis of nanoparticles. The interest in such particles has raised concerns about the environmental safety of their production methods; (2) Objectives: The current methods of nanoparticle production are often expensive and employ chemicals that are potentially harmful to the environment, which calls for the development of “greener” protocols. Herein we describe the synthesis of gold nanoparticles (AuNPs) using plant extracts, which offers an alternative, efficient, inexpensive, and environmentally friendly method to produce well-defined geometries of nanoparticles; (3) Methods: The phytochemicals present in the aqueous leaf extract acted as an effective reducing agent. The generated AuNPs were characterized by Transmission electron microscopy (TEM), Scanning electron microscope (SEM), and Atomic Force microscopy (AFM), X-ray diffraction (XRD), UV-visible spectroscopy, energy dispersive X-ray (EDX), and thermogravimetric analyses (TGA); (4) Results and Conclusions: The prepared nanoparticles were found to be biocompatible and exhibited no antimicrobial or antifungal effect, deeming the particles safe for various applications in nanomedicine. TGA analysis revealed that biomolecules, which were present in the plant extract, capped the nanoparticles and acted as stabilizing agents.
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Affiliation(s)
- Alaa A A Aljabali
- Faculty of Pharmacy, Yarmouk University, P.O.BOX 566, Irbid 21163, Jordan.
| | - Yazan Akkam
- Faculty of Pharmacy, Yarmouk University, P.O.BOX 566, Irbid 21163, Jordan.
| | - Mazhar Salim Al Zoubi
- Department of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid 21163, Jordan.
| | - Khalid M Al-Batayneh
- Department of Biological Science, Yarmouk University, P.O.BOX 566, Irbid 21163, Jordan.
| | - Bahaa Al-Trad
- Department of Biological Science, Yarmouk University, P.O.BOX 566, Irbid 21163, Jordan.
| | - Osama Abo Alrob
- Faculty of Pharmacy, Yarmouk University, P.O.BOX 566, Irbid 21163, Jordan.
| | - Alaaldin M Alkilany
- School of Pharmacy, University of Jordan, Aljubeiha, Amman, Jordan 11942, Jordan.
| | - Mourad Benamara
- Institute for Nanoscience, University of Arkansas, Fayetteville, AR 72701, USA.
| | - David J Evans
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
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Naraginti S, Tiwari N, Sivakumar A. Green synthesis of Silver and Gold Nanoparticles for Enhanced catalytic and bactericidal activity. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/263/2/022009] [Citation(s) in RCA: 5] [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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58
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Tang L, Shi J, Wu H, Zhang S, Liu H, Zou H, Wu Y, Zhao J, Jiang Z. In situ biosynthesis of ultrafine metal nanoparticles within a metal-organic framework for efficient heterogeneous catalysis. NANOTECHNOLOGY 2017; 28:365604. [PMID: 28617249 DOI: 10.1088/1361-6528/aa79e1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The synthesis of ultrafine, uniform, well-dispersed functional nanoparticles (NPs) under mild conditions in a controlled manner remains a great challenge. In biological systems, a well-defined biomineralization process is exploited, in which the control over NPs' size, shape and distribution is temporally and spatially regulated by a variety of biomolecules in a confined space. Inspired by this, we embedded proteins into metal-organic frameworks (MOFs) and explored a novel approach to synthesize metallic NPs by taking the synergy of protein-induced biomineralization process and space-confined effect of MOFs. The generation and growth of ultrafine metal NPs (Ag or Au) was induced by the entrapped lysozyme molecules and confined by the ZIF-8 pores. Due to the narrow size distribution and homogeneous spatial distribution of metal NPs, the as-synthesized NPs exhibit remarkably elevated catalytic activity. These findings demonstrate that MOFs can be loaded with specific proteins to selectively deposit inorganic NPs via biomimetic mineralization and these novel kinds of nanohybrid materials may find applications in catalysis, sensing and optics.
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Affiliation(s)
- Lei Tang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
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Naraginti S, Li Y. Preliminary investigation of catalytic, antioxidant, anticancer and bactericidal activity of green synthesized silver and gold nanoparticles using Actinidia deliciosa. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 170:225-234. [DOI: 10.1016/j.jphotobiol.2017.03.023] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 03/18/2017] [Accepted: 03/28/2017] [Indexed: 11/28/2022]
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61
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Rapid Synthesis of Gold Nanoparticles from Quercus incana and Their Antimicrobial Potential against Human Pathogens. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7010029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Maddinedi SB, Mandal BK, Anna KK. Environment friendly approach for size controllable synthesis of biocompatible Silver nanoparticles using diastase. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 49:131-136. [PMID: 27992806 DOI: 10.1016/j.etap.2016.11.019] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/25/2016] [Accepted: 11/29/2016] [Indexed: 06/06/2023]
Abstract
A green, facile method for the size selective synthesis of silver nanoparticles (AgNPs) using diastase as green reducing and stabilizing agent is reported. The thiol groups present in the diastase are mainly responsible for the rapid reaction rate of silver nanoparticles synthesis. The variation in the size and morphology of AgNPs were studied by changing the pH of diastase. The prepared silver nanoparticles were characterized by using UV-vis, XRD, FTIR, TEM and SAED. The FTIR analysis revealed the stabilization of diastase molecules on the surface of AgNPs. Additionally, in-vitro cytotoxicity experiments concluded that the cytotoxicity of the as-synthesized AgNPs towards mouse fibroblast (3T3) cell lines is dose and size dependent. Furthermore, the present method is an alternative to the traditional chemical methods of size controlled AgNPs synthesis.
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Affiliation(s)
- Sireesh Babu Maddinedi
- The Key laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; Trace Elements Speciation Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, India
| | - Badal Kumar Mandal
- Trace Elements Speciation Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, India.
| | - Kiran Kumar Anna
- Trace Elements Speciation Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, India
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63
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Yang L, Yan W, Wang H, Zhuang H, Zhang J. Shell thickness-dependent antibacterial activity and biocompatibility of gold@silver core–shell nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra00485k] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The Au@Ag NPs exhibit synergistically enhanced antibacterial activity and kill bacteria by affecting the cell membrane integrity or causing cell membrane disruption.
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Affiliation(s)
- Longping Yang
- National Center of Meat Quality & Safety Control
- College of Food Science and Technology
- Nanjing Agricultural University
- Nanjing
- China
| | - Wenjing Yan
- National Center of Meat Quality & Safety Control
- College of Food Science and Technology
- Nanjing Agricultural University
- Nanjing
- China
| | - Hongxia Wang
- National Center of Meat Quality & Safety Control
- College of Food Science and Technology
- Nanjing Agricultural University
- Nanjing
- China
| | - Hong Zhuang
- Quality and Safety Assessment Research Unit
- Agricultural Research Service
- USDA
- Athens
- USA
| | - Jianhao Zhang
- National Center of Meat Quality & Safety Control
- College of Food Science and Technology
- Nanjing Agricultural University
- Nanjing
- China
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64
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Jiang J, Zhang C, Zeng GM, Gong JL, Chang YN, Song B, Deng CH, Liu HY. The disinfection performance and mechanisms of Ag/lysozyme nanoparticles supported with montmorillonite clay. JOURNAL OF HAZARDOUS MATERIALS 2016; 317:416-429. [PMID: 27318738 DOI: 10.1016/j.jhazmat.2016.05.089] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 05/09/2016] [Accepted: 05/30/2016] [Indexed: 06/06/2023]
Abstract
The fabrication of montmorillonite (Mt) decorated with lysozyme-modified silver nanoparticles (Ag/lyz-Mt) was reported. The lysozyme (lyz) was served as both reducing and capping reagent. Coupling the bactericidal activity of the lyz with AgNPs, along with the high porous structure and large specific surface area of the Mt, prevented aggregation of AgNPs and promoted nanomaterial-bacteria interactions, resulting in a greatly enhanced bactericidal capability against both Gram positive and Gram negative bacteria. This paper systematically elucidated the bactericidal mechanisms of Ag/lyz-Mt. Direct contact between the Ag/lyz-Mt surface and the bacterial cell was essential to the disinfection. Physical disruption of bacterial membrane was considered to be one of the bactericidal mechanisms of Ag/lyz-Mt. Results revealed that Ag(+) was involved in the bactericidal activity of Ag/lyz-Mt via tests conducted using Ag(+) scavengers. A positive ROS (reactive oxygen species) scavenging test indirectly confirmed the involvement of ROS (O2(-), H2O2, and OH) in the bactericidal mechanism. Furthermore, the concentrations of individual ROS were quantified. Results showed that Ag/lyz-Mt nanomaterial could be a promising bactericide for water disinfection.
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Affiliation(s)
- Jing Jiang
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Chang Zhang
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China.
| | - Guang-Ming Zeng
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Ji-Lai Gong
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China.
| | - Ying-Na Chang
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Biao Song
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Can-Hui Deng
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
| | - Hong-Yu Liu
- College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, PR China
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65
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Wang H, Zhang YL, Xia H, Chen QD, Lee KS, Sun HB. Photodynamic assembly of nanoparticles towards designable patterning. NANOSCALE HORIZONS 2016; 1:201-211. [PMID: 32260622 DOI: 10.1039/c5nh00065c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent advancements in nanotechnology have continued to stimulate the development of functional devices based on nanomaterials. However, the controllable assembly of these tiny nanomaterials into functional structures is still a big challenge for further applications; nowhere is this more obvious than in the field of nanodevices. Currently, despite the fact that self-assembly technologies have revealed great potential to reach this end, serious problems with respect to morphology control, designable assembly and even flexible patterning set huge obstacles to the fabrication of functional devices. Nowadays, in addition to self-assembly technologies that make use of interaction forces between different objects, photodynamic assembly (PDA) technology has emerged as a promising route to architect functional materials with the help of optical driving forces towards device fabrication. In this review, we summarize the recent developments in PDA technology for the designable patterning of nanoparticles (NPs). The basic fundamentals of PDA that resort to optical trapping (OT) and typical examples regarding far-field/near-field OT for the PDA of various NPs have been reviewed. In particular, femtosecond laser induced photodynamic assembly (FsL-PDA), which enables the designable patterning of NPs through a direct writing manner, has been introduced. Finally, the current challenges and future prospects of this dynamic field are discussed based on our own opinions.
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Affiliation(s)
- Huan Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China.
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Affiliation(s)
- Imran Khan
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
| | - Jayati Ray Dutta
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
| | - Ramakrishnan Ganesan
- Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
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A comparative study of 5-Fluorouracil release from chitosan/silver and chitosan/silver/MWCNT nanocomposites and their cytotoxicity towards MCF-7. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 66:244-250. [PMID: 27207060 DOI: 10.1016/j.msec.2016.04.080] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 03/02/2016] [Accepted: 04/24/2016] [Indexed: 01/14/2023]
Abstract
5-Fluorouracil encapsulated chitosan/silver and chitosan/silver/multiwalled carbon nanotubes were synthesized to comparatively study the release profile and cytotoxicity of the systems towards MCF-7 cell line. The triclinic structure of 5-Fluorouracil, face centered cubic structure of silver and the semi-crystalline nature of chitosan were elucidated using the XRD pattern. The XRD pattern of Chitosan/silver/multiwalled carbon nanotube consisted of (002) reflection of graphitic carbon from carbon nanotube. The evident splitting of NH2 and NH3(+) and a variation in the intensity of OH peaks in the FTIR pattern were indicative of the binding of moieties like silver, carbon nanotube and 5-Fluorouracil to chitosan. The encapsulation of 5-Fluorouracil was evident from elemental mapping and from the presence of reflections corresponding to 5-Fluorouracil in the SAED pattern. The release profile showed a prolonged release for 5-Fluorouracil encapsulated Chitosan/silver/multiwalled carbon nanotube and a better cytotoxicity with a IC50 of 50μg/ml was observed for the same.
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Talekar S, Joshi A, Chougle R, Nakhe A, Bhojwani R. Immobilized enzyme mediated synthesis of silver nanoparticles using cross-linked enzyme aggregates (CLEAs) of NADH-dependent nitrate reductase. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.nanoso.2016.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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69
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Spherical silver nanoparticles in the detection of thermally denatured collagens. Anal Bioanal Chem 2016; 408:1993-6. [PMID: 26847191 DOI: 10.1007/s00216-016-9330-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 12/27/2015] [Accepted: 01/12/2016] [Indexed: 10/22/2022]
Abstract
We have developed a rapid colorimetric method to determine the concentration of denatured collagen in solution, which is based on the collagen-silver nanoparticle corona formation. Using the proposed method, the lowest detectable concentration of denatured collagen protein in a solution of pure collagen was 14.7, 8.5, and 8.6 μg mL(-1) for porcine (PCOL), rat tail (RCOL), and type I human recombinant (HCOL) collagen, respectively.
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Durán M, Silveira CP, Durán N. Catalytic role of traditional enzymes for biosynthesis of biogenic metallic nanoparticles: a mini-review. IET Nanobiotechnol 2016; 9:314-23. [PMID: 26435286 DOI: 10.1049/iet-nbt.2014.0054] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Although the formation mechanism of biogenically metallic nanoparticles is broadly associated to enzyme mediation, major attention has been given to the role of proteins and peptides in oxido-reduction of metallic ions leading to these nanostructures. Among the wide range of biomolecules that can act not only as capping agents but also as non-enzymatic agents to form nanoparticles, disulphide bridge-containing peptides and amino acids particularly stand out. The literature proposes that they actively participate in the process of nanoparticles' synthesis, with thiols groups and disulphide bridge moieties as the reaction catalytic sites. Similarly, denaturated enzymes containing exposed S-S or S-H moieties are also able to reduce metallic ions to form nanoparticles. This mini-review is focused on the biogenic synthesis of metallic nanoparticles such as gold, silver, copper, platinum, palladium, lead and selenium, in which proteins, peptides, reductases and even oxido-reductases act as non-enzymatic catalysts of the reduction reaction, opening economically and ecologically favourable perspectives in the nanoparticles synthesis field.
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Affiliation(s)
- Marcela Durán
- Laboratory on Nanostructures Synthesis and Interactions with Biosystems (NanoBioss) Institute of Chemistry, Universidade Estadual de Campinas, Bloco I, Sala 239, Caixa Postal 6154, CEP 13081-970 Campinas, SP, Brazil
| | - Camila P Silveira
- Laboratory on Nanostructures Synthesis and Interactions with Biosystems (NanoBioss) Institute of Chemistry, Universidade Estadual de Campinas, Bloco I, Sala 239, Caixa Postal 6154, CEP 13081-970 Campinas, SP, Brazil
| | - Nelson Durán
- Laboratory on Nanostructures Synthesis and Interactions with Biosystems (NanoBioss) Institute of Chemistry, Universidade Estadual de Campinas, Bloco I, Sala 239, Caixa Postal 6154, CEP 13081-970 Campinas, SP, Brazil.
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Yang K, Liu J, Shi HG, Zhang W, Qu W, Wang GX, Wang PL, Ji JH. Electron transfer driven highly valent silver for chronic wound treatment. J Mater Chem B 2016; 4:5729-5736. [DOI: 10.1039/c6tb01339b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper shows that reducing the dose of silver, additionally conferring electron transfer potential, could simultaneously achieve good biocompatibility and strong bactericidal ability without introducing extra chemical residuals for chronic wound treatment.
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Affiliation(s)
- K. Yang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - J. Liu
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - H. G. Shi
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - W. Zhang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - W. Qu
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - G. X. Wang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - P. L. Wang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - J. H. Ji
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
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72
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Ahmed S, Ahmad M, Swami BL, Ikram S. A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise. J Adv Res 2016; 7:17-28. [PMID: 26843966 PMCID: PMC4703479 DOI: 10.1016/j.jare.2015.02.007] [Citation(s) in RCA: 1052] [Impact Index Per Article: 131.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 02/25/2015] [Accepted: 02/27/2015] [Indexed: 11/06/2022] Open
Abstract
Metallic nanoparticles are being utilized in every phase of science along with engineering including medical fields and are still charming the scientists to explore new dimensions for their respective worth which is generally attributed to their corresponding small sizes. The up-and-coming researches have proven their antimicrobial significance. Among several noble metal nanoparticles, silver nanoparticles have attained a special focus. Conventionally silver nanoparticles are synthesized by chemical method using chemicals as reducing agents which later on become accountable for various biological risks due to their general toxicity; engendering the serious concern to develop environment friendly processes. Thus, to solve the objective; biological approaches are coming up to fill the void; for instance green syntheses using biological molecules derived from plant sources in the form of extracts exhibiting superiority over chemical and/or biological methods. These plant based biological molecules undergo highly controlled assembly for making them suitable for the metal nanoparticle syntheses. The present review explores the huge plant diversity to be utilized towards rapid and single step protocol preparatory method with green principles over the conventional ones and describes the antimicrobial activities of silver nanoparticles.
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Affiliation(s)
| | | | | | - Saiqa Ikram
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
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73
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Fu LH, Deng F, Ma MG, Yang J. Green synthesis of silver nanoparticles with enhanced antibacterial activity using holocellulose as a substrate and reducing agent. RSC Adv 2016. [DOI: 10.1039/c5ra27421d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The silver nanoparticles with uniform size and well-defined structure have been synthesized by using a hydrothermal method with holocellulose as substrate and reducing agent for silver ions, which exhibited good cytocompatibility and highly toxic.
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Affiliation(s)
- Lian-Hua Fu
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Fu Deng
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Ming-Guo Ma
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
| | - Jun Yang
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- PR China
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74
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Nanotechnology Definitions, Research, Industry and Property Rights. NANOSCIENCE IN FOOD AND AGRICULTURE 1 2016. [DOI: 10.1007/978-3-319-39303-2_2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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75
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Baumann V, Habeeb Muhammed MA, Blanch AJ, Dey P, Rodríguez-Fernández J. Biomolecules in Metal and Semiconductor Nanoparticle Growth. Isr J Chem 2015. [DOI: 10.1002/ijch.201500031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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76
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Liang JL, Shen SW, Ye SY, Ye LM. Prediction of size distribution of Ag nanoparticles synthesized via gamma-ray radiolysis. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2015.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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77
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Zheng L, Wan Y, Yu L, Zhang D. Lysozyme as a recognition element for monitoring of bacterial population. Talanta 2015; 146:299-302. [PMID: 26695267 DOI: 10.1016/j.talanta.2015.08.056] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/18/2015] [Accepted: 08/24/2015] [Indexed: 01/03/2023]
Abstract
Bacterial infections remain a significant challenge in biomedicine and environment safety. Increasing worldwide demand for point-of-care techniques and increasing concern on their safe development and use, require a simple and sensitive bioanalysis for pathogen detection. However, this goal is not yet achieved. A design for fluorescein isothiocyanate-labeled lysozyme (FITC-LYZ), which provides quantitative binding information for gram-positive bacteria, Micrococcus luteus, and detects pathogen concentration, is presented. The functional lysozyme is used not only as the pathogenic detection platform, but also as a tracking reagent for microbial population in antibacterial tests. A nonlinear relationship between the system response and the logarithm of the bacterial concentration was observed in the range of 1.2×10(2)-1.2×10(5) cfu mL(-1). The system has a potential for further applications and provides a facile and simple method for detection of pathogenic bacteria. Meanwhile, the fluorescein isothiocyanate -labeled lysozyme is also employed as the tracking agent for antibacterial dynamic assay, which show a similar dynamic curve compared with UV-vis test.
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Affiliation(s)
- Laibao Zheng
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
| | - Yi Wan
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
| | - Liangmin Yu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
| | - Dun Zhang
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.
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78
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Brahmkhatri VP, Chandra K, Dubey A, Atreya HS. An ultrastable conjugate of silver nanoparticles and protein formed through weak interactions. NANOSCALE 2015; 7:12921-12931. [PMID: 26166696 DOI: 10.1039/c5nr03047a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In recent years, silver nanoparticles (AgNPs) have attracted significant attention owing to their unique physicochemical, optical, conductive and antimicrobial properties. One of the properties of AgNPs which is crucial for all applications is their stability. In the present study we unravel a mechanism through which silver nanoparticles are rendered ultrastable in an aqueous solution in complex with the protein ubiquitin (Ubq). This involves a dynamic and reversible association and dissociation of ubiquitin from the surface of AgNP. The exchange occurs at a rate much greater than 25 s(-1) implying a residence time of <40 ms for the protein. The AgNP-Ubq complex remains stable for months due to steric stabilization over a wide pH range compared to unconjugated AgNPs. NMR studies reveal that the protein molecules bind reversibly to AgNP with an approximate dissociation constant of 55 μM and undergo fast exchange. At pH > 4 the positively charged surface of the protein comes in contact with the citrate capped AgNP surface. Further, NMR relaxation-based experiments suggest that in addition to the dynamic exchange, a conformational rearrangement of the protein takes place upon binding to AgNP. The ultrastability of the AgNP-Ubq complex was found to be useful for its anti-microbial activity, which allowed the recycling of this complex multiple times without the loss of stability. Altogether, the study provides new insights into the mechanism of protein-silver nanoparticle interactions and opens up new avenues for its application in a wide range of systems.
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79
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Oćwieja M, Adamczyk Z, Morga M, Kubiak K. Silver particle monolayers — Formation, stability, applications. Adv Colloid Interface Sci 2015; 222:530-63. [PMID: 25169969 DOI: 10.1016/j.cis.2014.07.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 06/30/2014] [Accepted: 07/01/2014] [Indexed: 01/23/2023]
Abstract
The formation of silver particle monolayers at solid substrates in self-assembly processes is thoroughly reviewed. Initially, various silver nanoparticle synthesis routes are discussed with the emphasis focused on the chemical reduction in aqueous media. Subsequently, the main experimental methods aimed at bulk suspension characterization are critically reviewed by pointing out their advantages and limitations. Also, various methods enabling the in situ studies of particle deposition and release kinetics, especially the streaming potential method are discussed. In the next section, experimental data are invoked illustrating the most important features of particle monolayer formation, in particular, the role of bulk suspension concentration, particle size, ionic strength, temperature and pH. Afterward, the stability of monolayers and particle release kinetics are extensively discussed. The results obtained by the ex situ AFM/SEM imaging of particles are compared with the in situ streaming potential measurements. An equivalency of both methods is demonstrated, especially in respect to the binding energy determination. It is shown that these experimental results can be adequately interpreted in terms of the hybrid theoretical approach that combines the bulk transport step with the surface blocking effects derived from the random sequential adsorption model. It is also concluded that the particle release kinetics is governed by the discrete electrostatic interactions among ion pairs on particle and substrate surfaces. The classical theories based on the mean-field (averaged) zeta potential concept proved inadequate. Using the ion pair concept the minor dependence of the binding energy on particle size, ionic strength, pH and temperature is properly explained. The final sections of this review are devoted to the application of silver nanoparticles and their monolayers in medicine, analytical chemistry and catalysis.
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Affiliation(s)
- Magdalena Oćwieja
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
| | - Zbigniew Adamczyk
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
| | - Maria Morga
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
| | - Katarzyna Kubiak
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
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80
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Liu L, Liu C, Nie L, Jiang T, Hong J, Zhang X, Luo L, Wang X. Study on the synergistic antibacterial effect of silver-carried layered zirconium alkyl-N,N-dimethylenephosphonate. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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81
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Huang J, Lin L, Sun D, Chen H, Yang D, Li Q. Bio-inspired synthesis of metal nanomaterials and applications. Chem Soc Rev 2015; 44:6330-74. [PMID: 26083903 DOI: 10.1039/c5cs00133a] [Citation(s) in RCA: 243] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This critical review focuses on recent advances in the bio-inspired synthesis of metal nanomaterials (MNMs) using microorganisms, viruses, plants, proteins and DNA molecules as well as their applications in various fields. Prospects in the design of bio-inspired MNMs for novel applications are also discussed.
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Affiliation(s)
- Jiale Huang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, and National Laboratory for Green Chemical Productions of Alcohols, Ethers, and Esters, Xiamen University, Xiamen, P. R. China.
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82
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Ujjwal RR, Purohit MP, Patnaik S, Ojha U. General Reagent Free Route to pH Responsive Polyacryloyl Hydrazide Capped Metal Nanogels for Synergistic Anticancer Therapeutics. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11497-507. [PMID: 25961335 DOI: 10.1021/acsami.5b02452] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Herewith, we report a facile synthesis of pH responsive polyacryloyl hydrazide (PAH) capped silver (Ag) or gold (Au) nanogels for anticancer therapeutic applications. A cost-effective instant synthesis of PAH-Ag or PAH-Au nanoparticles (NPs) possessing controllable particle diameter and narrow size distribution was accomplished by adding AgNO3 or AuCl to the aqueous solution of PAH under ambient conditions without using any additional reagent. PAH possessing carbonyl hydrazide pendant functionality served as both reducing and capping agent to produce and stabilize the NPs. The stability analysis by UV-vis, dynamic light scattering, and transmission electron microscopy techniques suggested that these NPs may be stored in a refrigerator for at least up to 2 weeks with negligible change in conformation. The average hydrodynamic size of PAH-Ag NPs synthesized using 0.2 mmol/L AgNO3 changed from 122 to 226 nm on changing the pH of the medium from 5.4 to 7.4, which is a characteristic property of pH responsive nanogel. Camptothecin (CPT) with adequate loading efficiency (6.3%) was encapsulated in the PAH-Ag nanogels. Under pH 5.4 conditions, these nanogels released 78% of the originally loaded CPT over a period of 70 h. The antiproliferative potential of PAH-Ag-CPT nanogels (at [CPT]=0.6 μg/mL) against MCF-7 breast adeno-carcinoma cells were ∼350% higher compared to that of the free CPT as evidenced by high cellular internalization of these nanogels. Induction of apoptosis in MCF-7 breast adeno-carcinoma cells by PAH-Ag-CPT nanogels was evidenced by accumulation of late apoptotic cell population. Drug along with the PAH-Ag NPs were also encapsulated in a pH responsive hydrogel through in situ gelation at room temperature using acrylic acid as the cross-linker. The resulting hydrogel released quantitative amounts of both drug and PAH-Ag NPs over a period of 16 h. The simplicity of synthesis and ease of drug loading with efficient release render these NPs a viable candidate for various biomedical applications, and moreover this synthetic procedure may be extended to other metal NPs.
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Affiliation(s)
- Rewati Raman Ujjwal
- †Department of Chemistry, Rajiv Gandhi Institute of Petroleum Technology, Ratapur Chowk, Rae Bareli UP-229316, India
| | - Mahaveer Prasad Purohit
- ‡Academy of Scientific and Innovative Research, CSIR-IITR, Lucknow, CSIR-IITR Campus, Lucknow 226001, India
| | - Satyakam Patnaik
- ‡Academy of Scientific and Innovative Research, CSIR-IITR, Lucknow, CSIR-IITR Campus, Lucknow 226001, India
| | - Umaprasana Ojha
- †Department of Chemistry, Rajiv Gandhi Institute of Petroleum Technology, Ratapur Chowk, Rae Bareli UP-229316, India
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83
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Wang H, Liu S, Zhang YL, Wang JN, Wang L, Xia H, Chen QD, Ding H, Sun HB. Controllable assembly of silver nanoparticles induced by femtosecond laser direct writing. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:024805. [PMID: 27877766 PMCID: PMC5036472 DOI: 10.1088/1468-6996/16/2/024805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/03/2015] [Accepted: 01/03/2015] [Indexed: 05/21/2023]
Abstract
We report controllable assembly of silver nanoparticles (Ag NPs) for patterning of silver microstructures. The assembly is induced by femtosecond laser direct writing (FsLDW). A tightly focused femtosecond laser beam is capable of trapping and driving Ag NPs to form desired micropatterns with a high resolution of ∼190 nm. Taking advantage of the 'direct writing' feature, three microelectrodes have been integrated with a microfluidic chip; two silver-based microdevices including a microheater and a catalytic reactor have been fabricated inside a microfluidic channel for chip functionalization. The FsLDW-induced programmable assembly of Ag NPs may open up a new way to the designable patterning of silver microstructures toward flexible fabrication and integration of functional devices.
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Affiliation(s)
- Huan Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Sen Liu
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Yong-Lai Zhang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Jian-Nan Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Lei Wang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Hong Xia
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Qi-Dai Chen
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
| | - Hong Ding
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, People’s Republic of China
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84
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Mishra A, Sardar M. Cellulase assisted synthesis of nano-silver and gold: Application as immobilization matrix for biocatalysis. Int J Biol Macromol 2015; 77:105-13. [PMID: 25797407 DOI: 10.1016/j.ijbiomac.2015.03.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 02/19/2015] [Accepted: 03/09/2015] [Indexed: 11/30/2022]
Abstract
In the present study, we report in vitro synthesis of silver and gold nanoparticles (NPs) using cellulase enzyme in a single step reaction. Synthesized nanoparticles were characterized by UV-VIS spectroscopy, Dynamic Light Spectroscopy (DLS), Transmission Electron Microscopy (TEM), Energy-dispersive X-ray Spectroscopy (EDX), X-ray Diffraction (XRD), Circular Dichroism (CD) and Fourier Transform Infrared Spectroscopy (FTIR). UV-visible studies shows absorption band at 415nm and 520nm for silver and gold NPs respectively due to surface plasmon resonance. Sizes of NPs as shown by TEM are 5-25nm for silver and 5-20nm for gold. XRD peaks confirmed about phase purity and crystallinity of silver and gold NPs. FTIR data shows presence of amide I peak on both the NPs. The cellulase assisted synthesized NPs were further exploited as immobilization matrix for cellulase enzyme. Thermal stability analysis reveals that the immobilized cellulase on synthesized NPs retained 77-80% activity as compared to free enzyme. While reusability data suggests immobilized cellulase can be efficiently used up to sixth cycles with minimum loss of enzyme activity. The secondary structural analysis of cellulase enzyme during the synthesis of NPs and also after immobilization of cellulase on these NPs was carried out by CD spectroscopy.
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Affiliation(s)
- Abhijeet Mishra
- Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Meryam Sardar
- Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India.
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85
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An extracellular enzyme synthesizes narrow-sized silver nanoparticles in both water and methanol. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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86
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Green photochemical synthesis of fluorescent carbon spheres in-situ enwrapped around Ag nanoparticles. Sci China Chem 2015. [DOI: 10.1007/s11426-014-5254-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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87
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Lv B, Shi X, Ma X, Zhang Z, Wang K. Controllable fabrication of multifunctional 1D Ag-based coordination polymer@PVP nanowires. NEW J CHEM 2015. [DOI: 10.1039/c4nj00719k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The composite Ag-based coordination polymer@PVP nanowires have been mildly synthesized in the presence of PVP, which may be potentially applied in anticancer and antibacterial fields.
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Affiliation(s)
- Bo Lv
- Department of Chemistry
- College of Science
- Nanjing Agricultural University
- Nanjing 210095
- P. R. China
| | - Xiaobo Shi
- College of Agriculture
- Nanjing Agricultural University
- Nanjing 210095
- P. R. China
| | - Xiaoyan Ma
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- Nanjing National Laboratory of Microstructures
- Nanjing University
- Nanjing 210093
| | - Zhiyang Zhang
- State Key Laboratory of Coordination Chemistry
- Coordination Chemistry Institute
- Nanjing National Laboratory of Microstructures
- Nanjing University
- Nanjing 210093
| | - Kuaibing Wang
- Department of Chemistry
- College of Science
- Nanjing Agricultural University
- Nanjing 210095
- P. R. China
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88
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Barani H, Montazer M, Braun H, Dutschk V. Stability of colloidal silver nanoparticles trapped in lipid bilayer: effect of lecithin concentration and applied temperature. IET Nanobiotechnol 2014; 8:282-9. [DOI: 10.1049/iet-nbt.2013.0048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Hossein Barani
- Department of CarpetFaculty of ArtUniversity of BirjandBirjandIran
| | - Majid Montazer
- Textile Engineering DepartmentCenter of Excellence in TextileAmirkabir University of TechnologyTehranIran
| | - Hans‐Georg Braun
- Max Bergmann Center of BiomaterialsLeibniz Institute of Polymer Research DresdenHohe Strasse 6D‐01069 DresdenGermany
| | - Victoria Dutschk
- Engineering of Fibrous Smart MaterialsDepartment of Engineering TechnologyUniversity of TwenteEnschedeThe Netherlands
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89
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Durán N, Cuevas R, Cordi L, Rubilar O, Diez MC. Biogenic silver nanoparticles associated with silver chloride nanoparticles (Ag@AgCl) produced by laccase from Trametes versicolor. SPRINGERPLUS 2014; 3:645. [PMID: 25485188 PMCID: PMC4237688 DOI: 10.1186/2193-1801-3-645] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 10/17/2014] [Indexed: 11/10/2022]
Abstract
In the present study, semi-purified laccase from Trametes versicolor was applied for the synthesis of silver nanoparticles, and the properties of the produced nanoparticles were characterized. All of the analyses of the spectra indicated silver nanoparticle formation. A complete characterization of the silver nanoparticles showed that a complex of silver nanoparticles and silver ions was produced, with the majority of the particles having a Ag(2+) chemical structure. A hypothetical mechanistic scheme was proposed, suggesting that the main pathway that was used was the interaction of silver ions with the T1 site of laccase, producing silver nanoparticles with the concomitant inactivation of laccase activity and posterior complexing with silver ions.
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Affiliation(s)
- Nelson Durán
- Biological Chemistry Laboratory, Instituto Química, Universidade Estadual de Campinas, CP 6154, CEP 13083-970 Campinas, SP Brazil ; Laboratory on Nanostructures Synthesis and Biosystems Interactions (NanoBioss) (UNICAMP/SP), Campinas, SP Brazil
| | - Raphael Cuevas
- Doctoral Program of Science of Natural Resources, Universidad de La Frontera, Temuco, Chile ; Environmental Biotechnology Center Science Nucleus BIOREN, Universidad de La Frontera, Temuco, Chile
| | - Livia Cordi
- Institute of Biology, Universidade Estadual de Campinas, Campinas, SP Brazil
| | - Olga Rubilar
- Environmental Biotechnology Center Science Nucleus BIOREN, Universidad de La Frontera, Temuco, Chile ; Department of Chemical Engineering, Universidad de La Frontera, Temuco, Chile
| | - Maria Cristina Diez
- Environmental Biotechnology Center Science Nucleus BIOREN, Universidad de La Frontera, Temuco, Chile ; Department of Chemical Engineering, Universidad de La Frontera, Temuco, Chile
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90
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Ashraf S, Chatha MA, Ejaz W, Janjua HA, Hussain I. Lysozyme-coated silver nanoparticles for differentiating bacterial strains on the basis of antibacterial activity. NANOSCALE RESEARCH LETTERS 2014; 9:565. [PMID: 25435831 PMCID: PMC4242785 DOI: 10.1186/1556-276x-9-565] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 10/01/2014] [Indexed: 06/04/2023]
Abstract
Lysozyme, an antibacterial enzyme, was used as a stabilizing ligand for the synthesis of fairly uniform silver nanoparticles adopting various strategies. The synthesized particles were characterized using UV-visible spectroscopy, FTIR, dynamic light scattering (DLS), and TEM to observe their morphology and surface chemistry. The silver nanoparticles were evaluated for their antimicrobial activity against several bacterial species and various bacterial strains within the same species. The cationic silver nanoparticles were found to be more effective against Pseudomonas aeruginosa 3 compared to other bacterial species/strains investigated. Some of the bacterial strains of the same species showed variable antibacterial activity. The difference in antimicrobial activity of these particles has led to the conclusion that antimicrobial products formed from silver nanoparticles may not be equally effective against all the bacteria. This difference in the antibacterial activity of silver nanoparticles for different bacterial strains from the same species may be due to the genome islands that are acquired through horizontal gene transfer (HGT). These genome islands are expected to possess some genes that may encode enzymes to resist the antimicrobial activity of silver nanoparticles. These silver nanoparticles may thus also be used to differentiate some bacterial strains within the same species due to variable silver resistance of these variants, which may not possible by simple biochemical tests.
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Affiliation(s)
- Sumaira Ashraf
- Department of Chemistry, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt 54792, Pakistan
- Current address: Fachbereich Physik Philipps Universität Marburg Renthof 7, D-35037 Marburg, Germany
| | - Mariyam Asghar Chatha
- Department of Environmental Sciences, Kinnaird College for Women, Lahore 54800, Pakistan
| | - Wardah Ejaz
- Department of Chemistry, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt 54792, Pakistan
| | - Hussnain Ahmed Janjua
- Department of Biology, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt 54792, Pakistan
- Current address: Atta-ur-Rehman School of Applied Biosciences, National University of Science and Technology (NUST), Islamabad 44000, Pakistan
| | - Irshad Hussain
- Department of Chemistry, SBA School of Science & Engineering (SSE), Lahore University of Management Sciences (LUMS), DHA, Lahore Cantt 54792, Pakistan
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91
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Zhang Y, Xue X, Zhang Z, Liu Y, Li G. Morphology and antibacterial properties of natural rubber composites based on biosynthesized nanosilver. J Appl Polym Sci 2014. [DOI: 10.1002/app.40746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yongqiang Zhang
- College of Materials and Chemical Engineering; Hainan University; Haikou 570228 People's Republic of China
| | - Xinghua Xue
- College of Materials and Chemical Engineering; Hainan University; Haikou 570228 People's Republic of China
| | - Ziqi Zhang
- College of Materials and Chemical Engineering; Hainan University; Haikou 570228 People's Republic of China
| | - Yafei Liu
- College of Materials and Chemical Engineering; Hainan University; Haikou 570228 People's Republic of China
| | - Guang Li
- College of Materials and Chemical Engineering; Hainan University; Haikou 570228 People's Republic of China
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92
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Yu CJ, Chen TH, Jiang JY, Tseng WL. Lysozyme-directed synthesis of platinum nanoclusters as a mimic oxidase. NANOSCALE 2014; 6:9618-24. [PMID: 24897557 DOI: 10.1039/c3nr06896j] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We present a simple, one-pot approach for synthesizing ultrafine platinum (Pt) nanoclusters (NCs) under alkaline conditions using lysozyme (Lys) as a template. From the analysis of the nanoclusters by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, Lys VI-stabilized Pt NCs majorly consisted of Pt4 clusters. The formation of Pt NCs was confirmed using X-ray photoelectron spectroscopy and Fourier-transformed infrared spectroscopy. The maximal fluorescence of Pt NCs appears at 434 nm with a quantum yield of 0.08, a fluorescence lifetime of 3.0 ns, and excitation-dependent emission wavelength behavior. Pt NCs exhibit an intrinsic oxidase-like activity because Pt NCs can catalyze O2 oxidation of organic substrates through a four-electron reduction process. Compared with larger Pt nanoparticles, the Pt NCs produce substantially greater catalytic activity in the O2-mediated oxidation of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid), 3,3',5,5'-tetramethylbenzidine, and dopamine.
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Affiliation(s)
- Cheng-Ju Yu
- Department of Chemistry, National SunYat-sen University, Kaohsiung, Taiwan.
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93
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Naraginti S, Sivakumar A. Eco-friendly synthesis of silver and gold nanoparticles with enhanced bactericidal activity and study of silver catalyzed reduction of 4-nitrophenol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:357-62. [PMID: 24681320 DOI: 10.1016/j.saa.2014.02.083] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 02/04/2014] [Accepted: 02/19/2014] [Indexed: 05/28/2023]
Abstract
The present study reports a simple and robust method for synthesis of silver and gold nanoparticles using Coleus forskohlii root extract as reducing and stabilizing agent. Stable silver nanoparticles (AgNPs) and gold nanopoarticles (AuNPs) were formed on treatment of an aqueous silver nitrate (AgNO3) and chloroauric acid (HAuCl4) solutions with the root extract. The nanoparticles obtained were characterized by UV-Visible spectroscopy, Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR). UV-Vis and TEM analysis indicate that with higher quantities of root extract, the interaction is enhanced leading to size reduction of spherical metal nanoparticles. XRD confirms face-centered cubic phase and the diffraction peaks can be attributed to (111), (200), (222) and (311) planes for these nanoparticles. These synthesized Ag and Au nanoparticles were found to exhibit excellent bactericidal activity against clinically isolated selected pathogens such as Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus). The synthesized AgNPs were also found to function as an efficient green catalyst in the reduction of anthropogenic pollutant 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride, which was apparent from the periodical color change from bright yellow to colorless, after the addition of AgNPs.
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Affiliation(s)
| | - A Sivakumar
- Chemistry Division, School of Advanced Sciences, VIT University, Vellore 632 014, India.
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94
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Martirosyan A, Schneider YJ. Engineered nanomaterials in food: implications for food safety and consumer health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:5720-50. [PMID: 24879486 PMCID: PMC4078545 DOI: 10.3390/ijerph110605720] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/02/2014] [Accepted: 05/14/2014] [Indexed: 01/08/2023]
Abstract
From the current state-of-the-art, it is clear that nanotechnology applications are expected to bring a range of benefits to the food sector aiming at providing better quality and conservation. In the meantime, a growing number of studies indicate that the exposure to certain engineered nanomaterials (ENMs) has a potential to lead to health complications and that there is a need for further investigations in order to unravel the biological outcomes of nanofood consumption. In the current review, we summarize the existing data on the (potential) use of ENMs in the food industry, information on the toxicity profiles of the commonly applied ENMs, such as metal (oxide) nanoparticles (NPs), address the potential food safety implications and health hazards connected with the consumption of nanofood. A number of health complications connected with the human exposure to ENMs are discussed, demonstrating that there is a real basis for the arisen concern not only connected with the gut health, but also with the potency to lead to systemic toxicity. The toxicological nature of hazard, exposure levels and risk to consumers from nanotechnology-derived food are on the earliest stage of investigation and this review also highlights the major gaps that need further research and regulation.
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Affiliation(s)
- Alina Martirosyan
- Laboratory of Cellular, Nutritional and Toxicological Biochemistry, Institute of Life Sciences (ISV) & UCLouvain, Louvain-la-Neuve B1348, Belgium.
| | - Yves-Jacques Schneider
- Laboratory of Cellular, Nutritional and Toxicological Biochemistry, Institute of Life Sciences (ISV) & UCLouvain, Louvain-la-Neuve B1348, Belgium.
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95
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Ramalingam S, Devi LB, Raghava Rao J, Unni Nair B. Rapid hydrogenation: perfect quasi architecture (Ag@SiO2NPs) as a substrate for nitrophenol reduction. RSC Adv 2014. [DOI: 10.1039/c4ra08885a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Spherical nanoparticles with core-frame architecture are a viable route to combine multiple functionalities on a nanoscopic scale.
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Affiliation(s)
- Sathya Ramalingam
- Chemical Laboratory
- Council of Scientific & Industrial Research–Central Leather Research Institute
- Chennai-600020, India
| | - Loganathan Bhavani Devi
- Chemical Laboratory
- Council of Scientific & Industrial Research–Central Leather Research Institute
- Chennai-600020, India
| | - Jonnalagadda Raghava Rao
- Chemical Laboratory
- Council of Scientific & Industrial Research–Central Leather Research Institute
- Chennai-600020, India
| | - Balachandran Unni Nair
- Chemical Laboratory
- Council of Scientific & Industrial Research–Central Leather Research Institute
- Chennai-600020, India
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96
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Ding Y, Shi L, Wei H. Protein-directed approaches to functional nanomaterials: a case study of lysozyme. J Mater Chem B 2014; 2:8268-8291. [DOI: 10.1039/c4tb01235f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Using lysozyme as a model, protein-directed approaches to functional nanomaterials were reviewed, making rational materials design possible in the future.
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Affiliation(s)
- Yubin Ding
- Department of Biomedical Engineering
- Aerosol Bioeffects and Health Research Center
- College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
| | - Leilei Shi
- Department of Biomedical Engineering
- Aerosol Bioeffects and Health Research Center
- College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
| | - Hui Wei
- Department of Biomedical Engineering
- Aerosol Bioeffects and Health Research Center
- College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
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97
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Zhou Y, Jiang X, Tang J, Su Y, Peng F, Lu Y, Peng R, He Y. A silicon-based antibacterial material featuring robust and high antibacterial activity. J Mater Chem B 2013; 2:691-697. [PMID: 32261287 DOI: 10.1039/c3tb21367f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In this article, we present a kind of silicon-based antibacterial material made of silver nanoparticle (AgNP)-decorated silicon wafers (AgNP@Si), which is facilely and rapidly (30 min) synthesized via a one-step reaction. Significantly, such a resultant silicon-based antibacterial material features stable and high antibacterial activity, preserving >99% antibacterial efficiency against E. coli during 30 day storage.
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Affiliation(s)
- Yanfeng Zhou
- Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
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98
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Hashimoto M, Toshima H, Yonezawa T, Kawai K, Narushima T, Kaga M, Endo K. Responses of RAW264.7 macrophages to water-dispersible gold and silver nanoparticles stabilized by metal-carbon σ-bonds. J Biomed Mater Res A 2013; 102:1838-49. [PMID: 23784947 DOI: 10.1002/jbm.a.34854] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 06/02/2013] [Accepted: 06/12/2013] [Indexed: 11/06/2022]
Abstract
Nanometals are currently receiving considerable attention for industrial and biomedical applications, but their potentially hazardous and toxic effects have not been extensively studied. This study evaluated the biological responses of novel water-dispersible gold (Au-NPs) and silver nanoparticles (Ag-NPs) stabilized by Au-C or Ag-C σ-bonds in cultured macrophages (RAW264.7), via analysis of the cell viability, the integrity of the plasma membrane, and the inflammatory and morphological properties. The cultured RAW264.7 was exposed to metal-NPs at various concentrations. The Ag-NPs showed cytotoxicity at high NP concentrations, but the cytotoxic effects of the Au-NPs were smaller than those of the Ag-NPs. For the microscopic analysis, both types of particles were internalized into cells, the morphological changes in the cells which manifested as an expansion of the vesicles' volume, were smaller for the Au-NPs compared with the Ag-NPs. For the Ag-NPs, the endocytosis abilities of the macrophages might have induced harmful effects, because of the expansion of the cell vesicles. Although an inflammatory response was observed for both the Au- and Ag-NPs, the harmful effects of the Au-NPs were smaller than those of the Ag-NPs, with minor morphological changes observed even after internalization of the NPs into the cells.
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Affiliation(s)
- Masanori Hashimoto
- Division of Biomaterials and Bioengineering, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, 061-0293, Japan
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99
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Boomi P, Prabu HG. Synthesis, characterization and antibacterial analysis of polyaniline/Au–Pd nanocomposite. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.053] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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100
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Mukherjee J, Malhotra D, Gautam S, Gupta MN. Green synthesis of nanocomposites consisting of silver and protease alpha chymotrypsin. ULTRASONICS SONOCHEMISTRY 2013; 20:1054-1061. [PMID: 23411166 DOI: 10.1016/j.ultsonch.2013.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/11/2013] [Accepted: 01/17/2013] [Indexed: 06/01/2023]
Abstract
The synergy of ultrasonication and the exposure to light radiation was found to be necessary in the formation of nanocomposites of silver and a protease alpha chymotrypsin. The reaction was carried out in aqueous medium and the process took just less than 35 min. Ultrasonication alone formed very negligible number of nanoparticles of <100 nm size whereas light alone produced enough number but the size of the particles was >100 nm. The effects of pH (in the range of 3-5, 9-10), ultrasonication time periods (0-30 min), ultrasonication intensity (33-83 W cm(-2)), energy of light radiation (short UV, long UV and Fluorescent light) and time period of exposure (5-60 min) to different light radiations were studied. The formation of nanocomposites under these effects was followed by surface plasmon resonance (SPR) spectra, dynamic light scattering (DLS), transmission electron microscopy (TEM). Ag-chymotrypsin nanocomposites of sizes ranging from 13 to 72 nm were formed using the synergy of ultrasonication and exposure to short UV radiation. Results show that ultrasonication promoted nuclei formation, growth and reduction of polydispersity by Ostwald ripening.
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Affiliation(s)
- Joyeeta Mukherjee
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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