1
|
Yang P, Liang Y, Zhang D, Ge S, Li S, Liang X, Zhang J, Xi Y, Zhang Y, Liu W. Rebuildable Silver Nanoparticles Employed as Seeds for Synthesis of Pure Silver Nanopillars with Hexagonal Cross-Sections under Room Temperature. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1263. [PMID: 37049356 PMCID: PMC10097324 DOI: 10.3390/nano13071263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 06/19/2023]
Abstract
Silver nanopillars with strong plasmonic effects are used for localized electromagnetic field enhancement and regulation and have wide potential applications in sensing, bioimaging, and surface-enhanced spectroscopy. Normally, the controlled synthesis of silver nanopillars is mainly achieved using heterometallic nanoparticles, including Au nanobipyramids and Pd decahedra, as seeds for inducing nanostructure growth. However, the seed materials are usually doped in silver nanopillar products. Herein, the synthesis of pure silver nanopillars with hexagonal cross-sections is achieved by employing rebuildable silver nanoparticles as seeds. An environmentally friendly, stable, and reproducible synthetic route for obtaining silver nanopillars is proposed using sodium dodecyl sulfate as the surface stabilizer. Furthermore, the seed particles induce the formation of regular structures at different temperatures, and, specifically, room temperature is beneficial for the growth of nanopillars. The availability of silver nanoparticle seeds using sodium alginate as a carrier at different temperatures was verified. A reproducible method was developed to synthesize pure silver nanopillars from silver nanoparticles at room temperature, which can provide a strategy for designing plasmonic nanostructures for chemical and biological applications.
Collapse
Affiliation(s)
- Pengfei Yang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yu Liang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Daxiao Zhang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Shaobo Ge
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Shijie Li
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Xichao Liang
- Research and Application of Regenerative Cellulose Fiber Key Laboratory of Sichuan Province, YiBin Grace Group Co., Ltd., Yibin 644000, China
| | - Jin Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yingxue Xi
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yan Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Weiguo Liu
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| |
Collapse
|
2
|
Oetiker N, Muñoz-Villagrán C, Vásquez CC, Bravo D, Pérez-Donoso JM. Bacterial phototoxicity of biomimetic CdTe-GSH quantum dots. J Appl Microbiol 2020; 131:155-168. [PMID: 33274558 DOI: 10.1111/jam.14957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/12/2020] [Accepted: 11/29/2020] [Indexed: 12/12/2022]
Abstract
AIM Fluorescent semiconductor nanoparticles or quantum dots (QDs) have excellent properties as photosensitizers in photodynamic therapy. This is mainly a consequence of their nanometric size and the generation of light-activated redox species. In previous works, we have reported the low-cost biomimetic synthesis of glutathione (GSH) capped QDs (CdTe-GSH QDs) with high biocompatibility. However, no studies have been performed to determine their phototoxic effect. The aim of this work was to characterize the light-induced toxicity of green (QDs500 ) and red (QDs600 ) QDs in Escherichia coli, and to study the molecular mechanism involved. METHODS AND RESULTS Photodegradation and reduction power of biomimetic QDs was determined to analyse their potential for radical generation. Escherichia coli cells were exposed to photoactivated QDs and viability was evaluated at different times. High toxicity was determined in E. coli cells exposed to photoactivated QDs, particularly QDs500 . The molecular mechanism involved in QDs phototoxicity was studied by determining Cd2+ -release and intracellular reactive oxygen species (ROS). Cells exposed to photoactivated QDs500 presented high levels of ROS. Cells exposed to photoactivated QDs500 presented high levels of ROS. Finally, to understand this phenomenon and the importance of oxidative and cadmium-stress in QDs-mediated phototoxicity, experiments were performed in E. coli mutants in ROS and Cd2+ response genes. As expected, E. coli mutants in ROS response genes were more sensitive than the wt strain to photoactivated QDs, with a higher effect in green-QDs500 . No increase in phototoxicity was observed in cadmium-related mutants. CONCLUSION Obtained results indicate that light exposure increases the toxicity of biomimetic QDs on E. coli cells. The mechanism of bacterial phototoxicity of biomimetic CdTe-GSH QDs is mostly associated with ROS generation. SIGNIFICANCE AND IMPACT OF THE STUDY The results presented establish biomimetic CdTe-GSH QDs as a promising cost-effective alternative against microbial infections, particularly QDs500 .
Collapse
Affiliation(s)
- N Oetiker
- BioNanotechnology and Microbiology Laboratory, Center of Bioinformatics and Integrative Biology (CBIB), Biological Sciences Faculty, Universidad Andres Bello, Santiago, Chile
| | - C Muñoz-Villagrán
- Molecular Microbiology Laboratory, Chemistry and Biology Faculty, Universidad de Santiago de Chile, Santiago, Chile
| | - C C Vásquez
- Molecular Microbiology Laboratory, Chemistry and Biology Faculty, Universidad de Santiago de Chile, Santiago, Chile
| | - D Bravo
- Oral Microbiology Laboratory, Dentistry Faculty, Universidad de Chile, Santiago, Chile
| | - J M Pérez-Donoso
- BioNanotechnology and Microbiology Laboratory, Center of Bioinformatics and Integrative Biology (CBIB), Biological Sciences Faculty, Universidad Andres Bello, Santiago, Chile
| |
Collapse
|
3
|
Yang P, Liang Y, Zhang D, Zhang J, Li S, Liu W. Synthesis of Silver Nanoplates with the Assistance of Natural Polymer (Sodium Alginate) Under 0 °C. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13173827. [PMID: 32872579 PMCID: PMC7503834 DOI: 10.3390/ma13173827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/21/2020] [Accepted: 08/26/2020] [Indexed: 06/11/2023]
Abstract
Some special conditions are important for chemical syntheses, such as high temperature and the medium used; unfortunately, uncontrollable influences are introduced during the process, resulting in unexpectedly low repeatability. Herein, we report a facile, environmentally friendly, stable, and repeatable methodology for synthesizing silver nanoplates (SNPs) at 0 °C that overcomes these issues and dramatically increases the yield. This method mainly employs sodium dodecyl sulfate (SDS) and sodium alginate (SA) as the surface stabilizer and assistant, respectively. Consequently, we produced hexagonal nanoplates and tailed nanoplates, and the characterization showed that SA dominates the clear and regular profiles of nanoplates at 0 °C. The tailed nanoplates, over time, showed the growth of heads and the dissolving of tails, and inclined to the nanoplates without tails. The synthesis method for SNPs used in this study-0 °C without media-showed high repeatability. We confirmed that these special conditions are not required for the synthesis of silver nanostructures (SNSs). Furthermore, we constructed a new method for preparing noble metal nanostructures and proved the possibility of preparing metal nanostructures at 0 °C.
Collapse
Affiliation(s)
- Pengfei Yang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China; (P.Y.); (Y.L.); (J.Z.); (S.L.)
| | - Yu Liang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China; (P.Y.); (Y.L.); (J.Z.); (S.L.)
| | - Daxiao Zhang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China;
| | - Jin Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China; (P.Y.); (Y.L.); (J.Z.); (S.L.)
| | - Shijie Li
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China; (P.Y.); (Y.L.); (J.Z.); (S.L.)
| | - Weiguo Liu
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China; (P.Y.); (Y.L.); (J.Z.); (S.L.)
| |
Collapse
|
4
|
Stabilization of Silver Nanoparticles by Cationic Aminoethyl Methacrylate Copolymers in Aqueous Media-Effects of Component Ratios and Molar Masses of Copolymers. Polymers (Basel) 2019; 11:polym11101647. [PMID: 31658788 PMCID: PMC6835539 DOI: 10.3390/polym11101647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/01/2019] [Accepted: 10/09/2019] [Indexed: 11/16/2022] Open
Abstract
The ability of aminoethyl methacrylate cationic copolymers to stabilize silver nanoparticles in water was investigated. Sodium borohydride (NaBH4) was employed as a reducing agent for the preparation of silver nanoparticles. The objects were studied by ultraviolet-visible (UV-vis) spectroscopy, dynamic light scattering (DLS), analytical ultracentrifugation (AUC) and scanning electron microscopy (SEM). Formation of nanoparticles in different conditions was investigated by varying ratios between components (silver salt, reducing agent and polymer) and molar masses of copolymers. As a result, we were successful in obtaining nanoparticles with a relatively narrow size distribution that were stable for more than six months. Consistent information on nanoparticle size was obtained. The holding capacity of the copolymer was studied.
Collapse
|
5
|
Liang X, Gao M, Xie H, Xu Q, Wu Y, Hu J, Lu A, Zhang L. Controllable Wrinkling Patterns on Chitosan Microspheres Generated from Self-Assembling Metal Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22824-22833. [PMID: 31188553 DOI: 10.1021/acsami.9b02127] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Materials with surface wrinkles at a micro/nanoscale possess extraordinary fascinating properties, and various techniques have been employed to create controllable wrinkles. Herein, natural polysaccharide was used to construct the surface wrinkled microsphere with controllable wrinkling patterns. A robust microsphere with an average size of about 55 μm fabricated from chitosan in alkali/urea aqueous solution was swelled and then coated orderly by introducing rigid silver nanoparticles (Ag NPs) with an average size of about 5 nm as the shell onto the surface through electrostatic layer-by-layer (LBL) self-assembly followed by deswelling, resulting in a surface wrinkled microsphere. The significant difference in the swelling behaviors between the stiff Ag shell and swelled chitosan microsphere could generate enough driving forces to form 3D micro- and nanoscale wrinkling surface topography. The surface wrinkled microspheres exhibited the hierarchically porous structure and hydrophobicity, and the topographical patterns could be adjusted by controlling the thickness of the Ag NP layer to achieve the sizes of wrinkling ranging from 60 to 300 nm. It was demonstrated that the wrinkled microspheres were superior as 3D surface-enhanced Raman spectroscopy (SERS) substrates, in which the wrinkled structure with spatial periodicity was proved to be effective for enhancing the SERS signal. The microsphere with controllable wrinkled surface topography could be applied to be a miniature 3D device, which promises potential technological applications in various areas.
Collapse
Affiliation(s)
- Xichao Liang
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Mengyue Gao
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Hongxia Xie
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Qi Xu
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Yuwei Wu
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Jiming Hu
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Ang Lu
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Lina Zhang
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| |
Collapse
|
6
|
Hu H, Wu X, Wang H, Wang H, Zhou J. Photo-reduction of Ag nanoparticles by using cellulose-based micelles as soft templates: Catalytic and antimicrobial activities. Carbohydr Polym 2019; 213:419-427. [PMID: 30879687 DOI: 10.1016/j.carbpol.2019.02.062] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/18/2019] [Accepted: 02/18/2019] [Indexed: 01/21/2023]
Abstract
Amphiphilic cellulose derivatives were synthesized from allyl cellulose (AC) and cystein (Cys)/n-dodecyl mercaptan (NDM) via the thiol-ene click reactions. The derivatives were self-assembled into micelles in distilled water, and the micelles sizes increased with an increase of the DSNDM. The amphiphilic cellulose micelles were served as the soft templates for the controllable synthesis of Ag nanoparticles (NPs) through the photo-reduction. Ag NPs were embedded and stabilized by the amphiphilic cellulose micelles, and their sizes increased from 3.1 to 14.4 nm with an increase of the original template sizes. The catalytic properties of the Ag-loaded micelles were evaluated by the reduction of p-nitropheonl to p-aminophenol. The results demonstrated that the Ag-loaded micelles exhibited excellent catalytic activity. The reduction followed the first-order rate law, and the reaction constant decreased with increasing size of Ag NPs. Moreover, the Ag-loaded micelles displayed good antimicrobial activities to both S. aureus and E. coli. Therefore, the Ag-loaded cellulose-based micelles have potential applications in various fields.
Collapse
Affiliation(s)
- Haoze Hu
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, 430072, China
| | - Xiaoqing Wu
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, 430072, China
| | - Haoying Wang
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, 430072, China
| | - Hongyu Wang
- School of Civil Engineering, Wuhan University, Wuhan 430072, China
| | - Jinping Zhou
- Department of Chemistry and Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, 430072, China.
| |
Collapse
|
7
|
Wu H, Teng C, Liu B, Tian H, Wang J. Characterization and long term antimicrobial activity of the nisin anchored cellulose films. Int J Biol Macromol 2018; 113:487-493. [DOI: 10.1016/j.ijbiomac.2018.01.194] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/28/2018] [Accepted: 01/29/2018] [Indexed: 10/18/2022]
|
8
|
Wang Y, Kong Q, Ding B, Chen Y, Yan X, Wang S, Chen F, You J, Li C. Bioinspired catecholic activation of marine chitin for immobilization of Ag nanoparticles as recyclable pollutant nanocatalysts. J Colloid Interface Sci 2017; 505:220-229. [DOI: 10.1016/j.jcis.2017.05.099] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/19/2017] [Accepted: 05/25/2017] [Indexed: 11/26/2022]
|
9
|
Salehizadeh H, Yan N, Farnood R. Recent advances in polysaccharide bio-based flocculants. Biotechnol Adv 2017; 36:92-119. [PMID: 28993221 DOI: 10.1016/j.biotechadv.2017.10.002] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 09/09/2017] [Accepted: 10/05/2017] [Indexed: 01/03/2023]
Abstract
Natural polysaccharides, derived from biomass feedstocks, marine resources, and microorganisms, have been attracting considerable attention as benign and environmentally friendly substitutes for synthetic polymeric products. Besides many other applications, these biopolymers are rapidly emerging as viable alternatives to harmful synthetic flocculating agents for the removal of contaminants from water and wastewater. In recent years, a great deal of effort has been devoted to improve the production and performance of polysaccharide bio-based flocculants. In this review, current trends in preparation and chemical modification of polysaccharide bio-based flocculants and their flocculation performance are discussed. Aspects including mechanisms of flocculation, biosynthesis, classification, purification and characterization, chemical modification, the effect of physicochemical factors on flocculating activity, and recent applications of polysaccharide bio-based flocculants are summarized and presented.
Collapse
Affiliation(s)
- Hossein Salehizadeh
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada.
| | - Ning Yan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada; Faculty of Forestry, University of Toronto, 33 Willcocks St., Toronto, Ontario M5S 3B3, Canada.
| | - Ramin Farnood
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, Ontario M5S 3E5, Canada.
| |
Collapse
|
10
|
Udoetok IA, Wilson LD, Headley JV. Quaternized Cellulose Hydrogels as Sorbent Materials and Pickering Emulsion Stabilizing Agents. MATERIALS 2016; 9:ma9080645. [PMID: 28773767 PMCID: PMC5509095 DOI: 10.3390/ma9080645] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 07/21/2016] [Accepted: 07/22/2016] [Indexed: 11/16/2022]
Abstract
Quaternized (QC) and cross-linked/quaternized (CQC) cellulose hydrogels were prepared by cross-linking native cellulose with epichlorohydrin (ECH), with subsequent grafting of glycidyl trimethyl ammonium chloride (GTMAC). Materials characterization via carbon, hydrogen and nitrogen (CHN) analysis, thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR)/13C solid state NMR spectroscopy provided supportive evidence of the hydrogel synthesis. Enhanced thermal stability of the hydrogels was observed relative to native cellulose. Colloidal stability of octanol and water mixtures revealed that QC induces greater stabilization over CQC, as evidenced by the formation of a hexane–water Pickering emulsion system. Equilibrium sorption studies with naphthenates from oil sands process water (OSPW) and 2-naphthoxy acetic acid (NAA) in aqueous solution revealed that CQC possess higher affinity relative to QC with the naphthenates. According to the Langmuir isotherm model, the sorption capacity of CQC for OSPW naphthenates was 33.0 mg/g and NAA was 69.5 mg/g. CQC displays similar affinity for the various OSPW naphthenate component species in aqueous solution. Kinetic uptake of NAA at variable temperature, pH and adsorbent dosage showed that increased temperature favoured the uptake process at 303 K, where Qm = 76.7 mg/g. Solution conditions at pH 3 or 9 had a minor effect on the sorption process, while equilibrium was achieved in a shorter time at lower dosage (ca. three-fold lower) of hydrogel (100 mg vs. 30 mg). The estimated activation parameters are based on temperature dependent rate constants, k1, which reveal contributions from enthalpy-driven electrostatic interactions. The kinetic results indicate an ion-based associative sorption mechanism. This study contributes to a greater understanding of the adsorption and physicochemical properties of cellulose-based hydrogels.
Collapse
Affiliation(s)
- Inimfon A Udoetok
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - John V Headley
- Water Science and Technology Directorate, Environment and Climate Change Canada, 11 Innovation Boulevard, Saskatoon, SK S7N 3H5, Canada.
| |
Collapse
|
11
|
Tian N, Ni X, Shen Z. Synthesis of main-chain imidazolium-based hyperbranched polymeric ionic liquids and their application in the stabilization of Ag nanoparticles. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.02.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Bacteriagenic silver nanoparticles: synthesis, mechanism, and applications. Appl Microbiol Biotechnol 2015; 99:4579-93. [PMID: 25952110 DOI: 10.1007/s00253-015-6622-1] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/13/2015] [Accepted: 04/16/2015] [Indexed: 01/03/2023]
Abstract
Silver nanoparticles (AgNPs) have received tremendous attention due to their significant antimicrobial properties. Large numbers of reports are available on the physical, chemical, and biological syntheses of colloidal AgNPs. Since there is a great need to develop ecofriendly and sustainable methods, biological systems like bacteria, fungi, and plants are being employed to synthesize these nanoparticles. The present review focuses specifically on bacteria-mediated synthesis of AgNPs, its mechanism, and applications. Bacterial synthesis of extra- and intracellular AgNPs has been reported using biomass, supernatant, cell-free extract, and derived components. The extracellular mode of synthesis is preferred over the intracellular mode owing to easy recovery of nanoparticles. Silver-resistant genes, c-type cytochromes, peptides, cellular enzymes like nitrate reductase, and reducing cofactors play significant roles in AgNP synthesis in bacteria. Organic materials released by bacteria act as natural capping and stabilizing agents for AgNPs, thereby preventing their aggregation and providing stability for a longer time. Regulation over reaction conditions has been suggested to control the morphology, dispersion, and yield of nanoparticles. Bacterial AgNPs have anticancer and antioxidant properties. Moreover, the antimicrobial activity of AgNPs in combination with antibiotics signifies their importance in combating the multidrug-resistant pathogenic microorganisms. Multiple microbicidal mechanisms exhibited by AgNPs, depending upon their size and shape, make them very promising as novel nanoantibiotics.
Collapse
|
13
|
Dong XY, Gao ZW, Yang KF, Zhang WQ, Xu LW. Nanosilver as a new generation of silver catalysts in organic transformations for efficient synthesis of fine chemicals. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00285k] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Silver nanoparticles catalysis has been of great interest in organic synthesis and has expanded rapidly in the past ten years because of nanosilver catalysts' unique reactivity and selectivity, stability, as well as recyclability in catalytic reactions.
Collapse
Affiliation(s)
- Xiao-Yun Dong
- Ministry of Education (MOE) Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- PR China
| | - Zi-Wei Gao
- Ministry of Education (MOE) Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- PR China
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education (MOE)
- Hangzhou Normal University
- Hangzhou 311121
- PR China
| | - Wei-Qiang Zhang
- Ministry of Education (MOE) Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- PR China
| | - Li-Wen Xu
- Ministry of Education (MOE) Key Laboratory of Applied Surface and Colloid Chemistry
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
- PR China
| |
Collapse
|
14
|
Chook SW, Chia CH, Zakaria S, Ayob MK, Huang NM, Neoh HM, Jamal R. Antibacterial hybrid cellulose–graphene oxide nanocomposite immobilized with silver nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra01897h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An antibacterial hybrid GO–AgNPs cellulose membrane was prepared. Incorporation of GO created a more porous structure of the regenerated cellulose membrane, improved the deposition of AgNPs and demonstrated an effective antibacterial activity with minimal release of Ag ions.
Collapse
Affiliation(s)
- Soon Wei Chook
- School of Applied Physics, Faculty of Science and Technology
- Universiti Kebangsaan Malaysia
- 43600 UKM Bangi
- Malaysia
| | - Chin Hua Chia
- School of Applied Physics, Faculty of Science and Technology
- Universiti Kebangsaan Malaysia
- 43600 UKM Bangi
- Malaysia
| | - Sarani Zakaria
- School of Applied Physics, Faculty of Science and Technology
- Universiti Kebangsaan Malaysia
- 43600 UKM Bangi
- Malaysia
| | - Mohd Khan Ayob
- School of Chemical Sciences and Food Technology
- Faculty of Science and Technology
- Universiti Kebangsaan Malaysia
- 43600 UKM Bangi
- Malaysia
| | - Nay Ming Huang
- Physics Department
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
- Malaysia
| | - Hui Min Neoh
- UKM Medical Molecular Biology Institute
- Universiti Kebangsaan Malaysia
- Kuala Lumpur
- Malaysia
| | - Rahman Jamal
- UKM Medical Molecular Biology Institute
- Universiti Kebangsaan Malaysia
- Kuala Lumpur
- Malaysia
| |
Collapse
|
15
|
|
16
|
Quaternized cellulose-supported gold nanoparticles as capillary coatings to enhance protein separation by capillary electrophoresis. J Chromatogr A 2014; 1343:160-6. [DOI: 10.1016/j.chroma.2014.03.079] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/30/2014] [Accepted: 03/31/2014] [Indexed: 12/17/2022]
|
17
|
Li X, Li M, Cui P, Zhao X, Gu T, Yu H, Jiang Y, Song D. Electrodeposition of Ag nanosheet-assembled microsphere@Ag dendrite core–shell hierarchical architectures and their application in SERS. CrystEngComm 2014. [DOI: 10.1039/c3ce41946k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Ag nanosheet-assembled microsphere@Ag dendrite core–shell hierarchical architectures with excellent SERS performance are successfully synthesized.
Collapse
Affiliation(s)
- Xiaodan Li
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Meicheng Li
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
- Suzhou Institute
| | - Peng Cui
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Xing Zhao
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Tiansheng Gu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Hang Yu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Yongjian Jiang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
| | - Dandan Song
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- School of Renewable Energy
- North China Electric Power University
- Beijing 102206, China
- Suzhou Institute
| |
Collapse
|