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Fernández-Lodeiro C, Tambosi R, Fernández-Lodeiro J, Fernández-Lodeiro A, Nuti S, Ouchane S, Kébaïli N, Pérez-Juste J, Pastoriza-Santos I, Lodeiro C. Adenosine-Monophosphate-Assisted Homogeneous Silica Coating of Silver Nanoparticles in High Yield. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2788. [PMID: 37887939 PMCID: PMC10609066 DOI: 10.3390/nano13202788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023]
Abstract
In this study, we propose a novel approach for the silica coating of silver nanoparticles based on surface modification with adenosine monophosphate (AMP). Upon AMP stabilization, the nanoparticles can be transferred into 2-propanol, promoting the growth of silica on the particle surfaces through the standard Stöber process. The obtained silica shells are uniform and homogeneous, and the method allows a high degree of control over shell thickness while minimizing the presence of uncoated NPs or the negligible presence of core-free silica NPs. In addition, AMP-functionalized AgNPs could be also coated with a mesoporous silica shell using cetyltrimethylammonium chloride (CTAC) as a template. Interestingly, the thickness of the mesoporous silica coating could be tightly adjusted by either the silica precursor concentration or by varying the CTAC concentration while keeping the silica precursor concentration constant. Finally, the influence of the silica coating on the antimicrobial effect of AgNPs was studied on Gram-negative bacteria (R. gelatinosus and E. coli) and under different bacterial growth conditions, shedding light on their potential applications in different biological environments.
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Affiliation(s)
- Carlos Fernández-Lodeiro
- Departamento de Química Física, Universidade de Vigo, Campus Universitario Lagoas Marcosende, 36310 Vigo, Spain; (C.F.-L.); (J.P.-J.); (I.P.-S.)
- Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, 36310 Vigo, Spain
| | - Reem Tambosi
- Laboratoire Aimé Cotton (LAC), UMR 9025, Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, 91405 Orsay, France;
| | - Javier Fernández-Lodeiro
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, 2829-516 Caparica, Portugal; (A.F.-L.); (S.N.)
- PROTEOMASS Scientific Society, BIOSCOPE Research Group, Departmental Building, Ground Floor, FCT-UNL Caparica Campus, 2829-516 Caparica, Portugal
| | - Adrián Fernández-Lodeiro
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, 2829-516 Caparica, Portugal; (A.F.-L.); (S.N.)
- PROTEOMASS Scientific Society, BIOSCOPE Research Group, Departmental Building, Ground Floor, FCT-UNL Caparica Campus, 2829-516 Caparica, Portugal
| | - Silvia Nuti
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, 2829-516 Caparica, Portugal; (A.F.-L.); (S.N.)
- PROTEOMASS Scientific Society, BIOSCOPE Research Group, Departmental Building, Ground Floor, FCT-UNL Caparica Campus, 2829-516 Caparica, Portugal
| | - Soufian Ouchane
- Institute for Integrative Biology of the Cell (I2BC), UMR 9198, Centre National de la Recherche Scientifique (CNRS), Commissariat à l’Énergie Atomique (CEA), Université Paris-Saclay, 91198 Gif-sur-Yvette, France;
| | - Nouari Kébaïli
- Laboratoire Aimé Cotton (LAC), UMR 9025, Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, 91405 Orsay, France;
| | - Jorge Pérez-Juste
- Departamento de Química Física, Universidade de Vigo, Campus Universitario Lagoas Marcosende, 36310 Vigo, Spain; (C.F.-L.); (J.P.-J.); (I.P.-S.)
- Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, 36310 Vigo, Spain
| | - Isabel Pastoriza-Santos
- Departamento de Química Física, Universidade de Vigo, Campus Universitario Lagoas Marcosende, 36310 Vigo, Spain; (C.F.-L.); (J.P.-J.); (I.P.-S.)
- Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, 36310 Vigo, Spain
| | - Carlos Lodeiro
- BIOSCOPE Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, Caparica Campus, 2829-516 Caparica, Portugal; (A.F.-L.); (S.N.)
- PROTEOMASS Scientific Society, BIOSCOPE Research Group, Departmental Building, Ground Floor, FCT-UNL Caparica Campus, 2829-516 Caparica, Portugal
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2
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Moshtaghi S, Hamadanian M, Salavati-Niasari M. A simple hydrothermal route for the preparation of novel Na–Y–W nano-oxides and their application in dye degradation. RSC Adv 2022; 12:4913-4923. [PMID: 35425470 PMCID: PMC8981251 DOI: 10.1039/d1ra07645k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 01/25/2022] [Indexed: 11/21/2022] Open
Abstract
The fabricated NaY(WO4)2 was identified through diverse analysis methods. Therefore, to optimize NaY(WO4)2 morphology, saccharide carbohydrates were manipulated as a capping agent. In this study, glucose, fructose, lactose, cellulose, and starch were utilized as the capping agents. SEM images show that fructose was the optimal capping agent for achieving uniform and well-shaped nanoparticles. The photodegradation of organic dyes such as M.O and Rd.B by NaY(WO4)2 was evaluated under UV and Vis light. The bandgap energy of the as-prepared sample was measured by the Tauc plot, and was found to be nearly 3.85 eV. To study the photocatalytic characteristics, the influence of dye dosage and reusability on photodegradation behavior were investigated. NaY(WO4)2 nanoparticles were fabricated via a simple hydrothermal method using saccharide carbohydrates as capping agents. The photocatalytic behavior of the as-prepared NaY(WO4)2 nanostructures was studied.![]()
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Affiliation(s)
- Saeed Moshtaghi
- Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, Iran
| | - Masoud Hamadanian
- Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, Iran
| | - Masoud Salavati-Niasari
- Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box 87317-51167, Iran
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3
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Yang W, Kaur S, Kim YD, Kim JM, Lee SH, Lim DK. Precise control over the silica shell thickness and finding the optimal thickness for the peak heat diffusion property of AuNR@SiO 2. J Mater Chem B 2021; 10:364-372. [PMID: 34825907 DOI: 10.1039/d1tb02288a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Silica-coated gold nanorods (AuNRs) exhibit significantly enhanced photothermal effects and photoacoustic (PA) signal intensities, which is beneficial for various nanophotonic applications in materials science. However, the silica shell thickness for optimum enhancement is not fully understood and is even controversial depending on the physical state of the silica shell. This is because of the lack of systematic investigations of the nanoscale silica shell thickness and the photothermal effect. This study provides a robust synthetic method to control the silica shell thickness at the nanoscale and the physical state-dependent heat diffusion property. The selected base and solvent system enabled the production of silica-coated AuNRs (AuNR@SiO2) with silica shell thicknesses of 5, 10, 15, 20, 25, 30, 35, and 40 nm. AuNRs with a 20 nm silica shell showed the highest photothermal effect with a 1.45-times higher photothermal efficiency than that of AuNRs without a silica shell. The low density of the silica shell on the AuNRs showed a low photothermal effect and photostability. It was found that the disruption of cetyltrimethyl ammonium bromide (CTAB) layers on the AuNRs was responsible for the low photostability of the AuNRs. The simulation study for the heat diffusion property showed facilitated heat diffusion in the presence of a 20 nm silica shell. In a cell-based study, AuNRs with a 20 nm silica shell showed the most sensitive photothermal effect for cell death. The results of this robust study can provide conclusive conditions for the optimal silica shell thickness to obtain the highest photothermal effect, which will be useful for the future design of nanomaterials in various fields of application.
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Affiliation(s)
- Wonseok Yang
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Sandeep Kaur
- Department of Nanoconvergence Engineering and Department of Polymer Nano-Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Yong Duk Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
| | - Jung-Mu Kim
- Department of Electronic Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Seung Hee Lee
- Department of Nanoconvergence Engineering and Department of Polymer Nano-Science and Technology, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Dong-Kwon Lim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
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4
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Devi A, Nair SS, Yadav S, De AK. Controlling optical trapping of metal-dielectric hybrid nanoparticles under ultrafast pulsed excitation: a theoretical investigation. NANOSCALE ADVANCES 2021; 3:3288-3297. [PMID: 36133651 PMCID: PMC9418059 DOI: 10.1039/d0na01083a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 04/02/2021] [Indexed: 06/16/2023]
Abstract
Crucial to effective optical trapping is the ability to precisely control the nature of force/potential to be attractive or repulsive. The nature of particles being trapped is as important as the role of laser parameters in determining the stability of the optical trap. In this context, hybrid particles comprising of both dielectric and metallic materials offer a wide range of new possibilities due to their tunable optical properties. On the other hand, femtosecond pulsed excitation is shown to provide additional advantages in tuning of trap stiffness through harnessing optical and thermal nonlinearity. Here we demonstrate that (metal/dielectric hybrid) core/shell type and hollow-core type nanoparticles experience more force than conventional core-type nanoparticles under both continuous-wave and, in particular, ultrafast pulsed excitation. Thus, for the first time, we show how tuning both materials properties as well as the nature of excitation can impart unprecedented control over nanoscale optical trapping and manipulation leading to a wide range of applications.
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Affiliation(s)
- Anita Devi
- Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar Punjab 140306 India
| | - Shruthi S Nair
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar Punjab 140306 India
- Institute of Physical Chemistry, Friedrich-Schiller-University Jena Helmholtzweg 4 07743 Jena Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology (IPHT) Albert-Einstein-Strasse 9 07745 Jena Germany
| | - Sumit Yadav
- Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar Punjab 140306 India
| | - Arijit K De
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Knowledge City, Sector 81, SAS Nagar Punjab 140306 India
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5
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Chang Y, Wang Y, Wang W, Yu D. Highly efficient infrared stealth asymmetric-structure waterborne polyurethane composites prepared via one-step density-driven filler separation method. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126177] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Tan M, Horvàth L, Brunetto PS, Fromm KM. Trithiocarbonate-Functionalized PNiPAAm-Based Nanocomposites for Antimicrobial Properties. Polymers (Basel) 2018; 10:E665. [PMID: 30966699 PMCID: PMC6404129 DOI: 10.3390/polym10060665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 12/22/2022] Open
Abstract
In this study, four trithiocarbonate-functionalized PNiPAAms with different molecular weights were synthesized and used as a matrix to form composites with silver nanoparticles. Nanocomposites with several polymer-to-silver ratios P:Ag⁺ were prepared in order to evaluate the influence of silver loading. UV studies showed a thermoresponsive behavior of the nanocomposites with a thermo-reversibility according to cooling-heating cycles. Release kinetics demonstrated that the release of silver ions is mainly influenced by the size of the silver nanoparticles (AgNPs), which themselves depend on the polymer length. Antimicrobial tests against E. coli and S. aureus showed that some of the nanocomposites are antimicrobial and even full killing could be induced.
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Affiliation(s)
- Milène Tan
- Department of Chemistry, University of Fribourg, Chemin du Musée, 9, 1700 Fribourg, Switzerland.
| | - Lenke Horvàth
- Department of Chemistry, University of Fribourg, Chemin du Musée, 9, 1700 Fribourg, Switzerland.
| | - Priscilla S Brunetto
- Department of Chemistry, University of Fribourg, Chemin du Musée, 9, 1700 Fribourg, Switzerland.
| | - Katharina M Fromm
- Department of Chemistry, University of Fribourg, Chemin du Musée, 9, 1700 Fribourg, Switzerland.
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7
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Chen Q, Ge Y, Granbohm H, Hannula SP. Effect of Ethanol on Ag@Mesoporous Silica Formation by In Situ Modified Stöber Method. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E362. [PMID: 29794995 PMCID: PMC6027285 DOI: 10.3390/nano8060362] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 05/22/2018] [Accepted: 05/22/2018] [Indexed: 11/24/2022]
Abstract
Tunable core-shell Ag@Mesoporous SiO₂ spheres were synthesized via an in situ modified Stöber approach by varying the amount of ethanol (EtOH) expanding their potentials in many applications. Mesoporous silica was generated by adding tetraethyl orthosilicate (TEOS) to the mixture of colloidal Ag particles prepared by reducing silver nitrate (AgNO₃) with L-ascorbic acid and using hexadecyltrimethylammonium bromide (CTAB) as a template at the presence of ethanol and sodium hydroxide (NaOH) at pH 10 as a catalyst. The average sizes of the Ag cores at the three increasing volumes of ethanol were ~47 ± 6, 36 ± 4, and 11 ± 5 nm, while the silica particle size and the thickness of the silica shells increased, resulting in a blueshift of localized surface plasmon resonances (LSPR) of the Ag NPs. The corresponding specific surface areas of silica particles were 356 ± 10, 419 ± 20 and 490 ± 25 m² g-1, and average pore diameters varied from 5.7, 5.0 to 3.3 nm according to BET and BJH analyses. TEM studies confirmed the core-shell structure, pore sizes and shapes of mesoporous shells. The dissolution tests demonstrated that the release of Ag from the powder samples is pH-sensitive and time-dependent.
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Affiliation(s)
- Qian Chen
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland.
| | - Yanling Ge
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland.
| | - Henrika Granbohm
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland.
| | - Simo-Pekka Hannula
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland.
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8
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Control of the Size of Silver Nanoparticles and Release of Silver in Heat Treated SiO₂-Ag Composite Powders. MATERIALS 2018; 11:ma11010080. [PMID: 29304021 PMCID: PMC5793578 DOI: 10.3390/ma11010080] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 12/22/2017] [Accepted: 01/02/2018] [Indexed: 12/23/2022]
Abstract
The growth of silver nanoparticles, the activation energy for silver particle growth, and the release of silver species in heat treated SiO2-Ag composite powders are investigated. The silver particle growth is controlled by heat treatment for 75 min of the as-synthesized SiO2-Ag composite powder at 300–800 °C. During heat treatment the mean size of the Ag particles increases from 10 nm up to 61 nm with increasing temperature, however, the particle size distribution widens and the mean size increases with increasing heat treatment temperature. Based on X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) studies, silver particles are crystalline and in a metallic state after annealing in all SiO2-Ag composite powders. The growth of Ag particles is suggested to take place via diffusion and Ostwald ripening. The activation energy for particle growth was determined as 0.14 eV. The dissolution of silver in aqueous solutions from the SiO2-Ag composites heat treated, at 300 °C, 600 °C, and 700 °C, was investigated by varying pH and temperature. The dissolution was reduced in all conditions with increasing silver particle size, i.e., when the total surface area of Ag particles is reduced. It is suggested that the dissolution of silver from the composite powders can conveniently be adjusted by controlling the Ag particle size by the heat treatment of the composite powder.
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9
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Ganguly S, Das P, Bose M, Das TK, Mondal S, Das AK, Das NC. Sonochemical green reduction to prepare Ag nanoparticles decorated graphene sheets for catalytic performance and antibacterial application. ULTRASONICS SONOCHEMISTRY 2017; 39:577-588. [PMID: 28732982 DOI: 10.1016/j.ultsonch.2017.05.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/04/2017] [Accepted: 05/05/2017] [Indexed: 05/24/2023]
Abstract
The emerging popularity and wide acceptance of green chemistry and environmentally benign/ecofriendly approaches have comprehensively considered for catalyst synthesis methods. Natural resource derived carbogenic quantum dots has been used in assistance with ultrasonic shock wave to graphene oxide (GO) aqueous dispersion in order to prepare reduced graphene oxide decorated with silver nanoparticles following the 'top-down' method. The total reduction process is done without using any toxic external reducing agents and any surfactants or stabilizers, thus it can be accepted as green method. Sonochemical destratification of the GO layers provides green attributes due to scalable, non-hazardous and relatively fast reduction to enhance surface area of the GO. Arresting the silver nanoparticles onto basal planes of graphene oxide can act as an efficient solid state support catalyst for fast reduction of toxic nitro aryls. Besides this work also reports bactericidal feature exhibited by the catalyst. Thus a dual functioning nanomaterial has been successfully developed which can be a suitable alternative for reductive forthcoming specialty/multifunctional membrane and other high-end medicinal or industrial applications.
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Affiliation(s)
- Sayan Ganguly
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur, 721302, India
| | - Poushali Das
- School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur, 721302, India
| | - Madhuparna Bose
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, 721302, India
| | - Tushar Kanti Das
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur, 721302, India
| | - Subhadip Mondal
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur, 721302, India
| | - Amit Kumar Das
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, 721302, India
| | - Narayan C Das
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur, 721302, India; School of Nanoscience and Technology, Indian Institute of Technology, Kharagpur, 721302, India.
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10
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Bradley D, Siti Shafiqah A, Siti Rozaila Z, Sabtu SN, Abdul Sani S, Alanazi AH, Jafari S, Amouzad Mahdiraji G, Mahamd Adikan F, Maah M, Nisbet A, Tamchek N, Abdul Rashid H, Alkhorayef M, Alzimami K. Developments in production of silica-based thermoluminescence dosimeters. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2016.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Acar Bozkurt P. Sonochemical green synthesis of Ag/graphene nanocomposite. ULTRASONICS SONOCHEMISTRY 2017; 35:397-404. [PMID: 27836383 DOI: 10.1016/j.ultsonch.2016.10.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/18/2016] [Accepted: 10/19/2016] [Indexed: 05/24/2023]
Abstract
Recently, the popularity for green chemistry and chemical process have increased. The approach must comprehensively be considered for these principles in the design of a synthesis method, chemical analysis, or chemical process. Utilization of nontoxic chemicals, environment friendly solvents, and renewable materials are some of the important issues in green synthesis methods. The importance of green synthesis arises in the production of Ag/graphene nanocomposites, due to their future potential applications in nanomedicine and materials engineering. Herein, a simple approach to synthesizing Ag/graphene nanocomposite using sodium citrate as the reducing agent by sonochemical method has been reported. The synthesized Ag/graphene nanocomposite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and UV-Visible spectroscopy. The results showed that graphene oxide was successfully reduced to graphene and silver ions to silver nanoparticles with sodium citrate. Spherical Ag nanoparticles with a mean particle size of approximately 20nm on graphene sheets were synthesized sonochemically. The use of sodium citrate as an environment-friendly reducing agent provided green attributes whereas the use of sonochemical processes as the synthesis method provided economic attributes to this study. The results obtained demonstrate this method to be applicable to the synthesis of other metals on graphene sheets and may possibly find various forthcoming medicinal, industrial and technological applications.
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Affiliation(s)
- Pınar Acar Bozkurt
- Department of Chemistry, Science Faculty, Ankara University, Ankara, Turkey.
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12
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Isaacs MA, Durndell LJ, Hilton AC, Olivi L, Parlett CMA, Wilson K, Lee AF. Tunable Ag@SiO2 core–shell nanocomposites for broad spectrum antibacterial applications. RSC Adv 2017. [DOI: 10.1039/c7ra03131a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Silica encapsulated silver nanoparticle core–shell nanocomposites of tunable dimensions were synthesised via a one-pot reverse microemulsion route to achieve controlled release of Ag+ ions for broad spectrum antibacterial application.
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Affiliation(s)
- Mark A. Isaacs
- European Bioenergy Research Institute
- Aston University
- Birmingham
- UK
| | - Lee J. Durndell
- European Bioenergy Research Institute
- Aston University
- Birmingham
- UK
| | | | | | | | - Karen Wilson
- European Bioenergy Research Institute
- Aston University
- Birmingham
- UK
| | - Adam F. Lee
- European Bioenergy Research Institute
- Aston University
- Birmingham
- UK
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13
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Worstell NC, Krishnan P, Weatherston JD, Wu HJ. Binding Cooperativity Matters: A GM1-Like Ganglioside-Cholera Toxin B Subunit Binding Study Using a Nanocube-Based Lipid Bilayer Array. PLoS One 2016; 11:e0153265. [PMID: 27070150 PMCID: PMC4829222 DOI: 10.1371/journal.pone.0153265] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/25/2016] [Indexed: 12/18/2022] Open
Abstract
Protein-glycan recognition is often mediated by multivalent binding. These multivalent bindings can be further complicated by cooperative interactions between glycans and individual glycan binding subunits. Here we have demonstrated a nanocube-based lipid bilayer array capable of quantitatively elucidating binding dissociation constants, maximum binding capacity, and binding cooperativity in a high-throughput format. Taking cholera toxin B subunit (CTB) as a model cooperativity system, we studied both GM1 and GM1-like gangliosides binding to CTB. We confirmed the previously observed CTB-GM1 positive cooperativity. Surprisingly, we demonstrated fucosyl-GM1 has approximately 7 times higher CTB binding capacity than GM1. In order to explain this phenomenon, we hypothesized that the reduced binding cooperativity of fucosyl-GM1 caused the increased binding capacity. This was unintuitive, as GM1 exhibited higher binding avidity (16 times lower dissociation constant). We confirmed the hypothesis using a theoretical stepwise binding model of CTB. Moreover, by taking a mixture of fucosyl-GM1 and GM2, we observed the mild binding avidity fucosyl-GM1 activated GM2 receptors enhancing the binding capacity of the lipid bilayer surface. This was unexpected as GM2 receptors have negligible binding avidity in pure GM2 bilayers. These unexpected discoveries demonstrate the importance of binding cooperativity in multivalent binding mechanisms. Thus, quantitative analysis of multivalent protein-glycan interactions in heterogeneous glycan systems is of critical importance. Our user-friendly, robust, and high-throughput nanocube-based lipid bilayer array offers an attractive method for dissecting these complex mechanisms.
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Affiliation(s)
- Nolan C. Worstell
- Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
| | - Pratik Krishnan
- Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
| | - Joshua D. Weatherston
- Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
| | - Hung-Jen Wu
- Department of Chemical Engineering, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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14
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Li X, Niitsoo O, Couzis A. Electrostatically assisted fabrication of silver–dielectric core/shell nanoparticles thin film capacitor with uniform metal nanoparticle distribution and controlled spacing. J Colloid Interface Sci 2016; 465:333-41. [DOI: 10.1016/j.jcis.2015.11.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/15/2015] [Accepted: 11/17/2015] [Indexed: 11/26/2022]
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15
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Suchomel P, Kvitek L, Panacek A, Prucek R, Hrbac J, Vecerova R, Zboril R. Comparative study of antimicrobial activity of AgBr and Ag nanoparticles (NPs). PLoS One 2015; 10:e0119202. [PMID: 25781988 PMCID: PMC4363559 DOI: 10.1371/journal.pone.0119202] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 01/11/2015] [Indexed: 11/30/2022] Open
Abstract
The diverse mechanism of antimicrobial activity of Ag and AgBr nanoparticles against gram-positive and gram-negative bacteria and also against several strains of candida was explored in this study. The AgBr nanoparticles (NPs) were prepared by simple precipitation of silver nitrate by potassium bromide in the presence of stabilizing polymers. The used polymers (PEG, PVP, PVA, and HEC) influence significantly the size of the prepared AgBr NPs dependently on the mode of interaction of polymer with Ag+ ions. Small NPs (diameter of about 60–70 nm) were formed in the presence of the polymer with low interaction as are PEG and HEC, the polymers which interact with Ag+ strongly produce nearly two times bigger NPs (120–130 nm). The prepared AgBr NPs were transformed to Ag NPs by the reduction using NaBH4. The sizes of the produced Ag NPs followed the same trends – the smallest NPs were produced in the presence of PEG and HEC polymers. Prepared AgBr and Ag NPs dispersions were tested for their biological activity. The obtained results of antimicrobial activity of AgBr and Ag NPs are discussed in terms of possible mechanism of the action of these NPs against tested microbial strains. The AgBr NPs are more effective against gram-negative bacteria and tested yeast strains while Ag NPs show the best antibacterial action against gram-positive bacteria strains.
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Affiliation(s)
- Petr Suchomel
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Libor Kvitek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
- * E-mail:
| | - Ales Panacek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Robert Prucek
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Jan Hrbac
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
| | - Renata Vecerova
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University Olomouc, Czech Republic
- Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, Czech Republic
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16
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Lismont M, Páez CA, Dreesen L. A one-step short-time synthesis of Ag@SiO2 core-shell nanoparticles. J Colloid Interface Sci 2015; 447:40-9. [PMID: 25697687 DOI: 10.1016/j.jcis.2015.01.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 01/22/2015] [Accepted: 01/26/2015] [Indexed: 10/24/2022]
Abstract
A performance of shell-thickness precise control in silver-silica coating core-shell nanoparticles is presented. 60nm sized citrate-stabilized silver nanoparticles are directly silica coated using a modified Stöber process. Tetraethyl orthosilicate is used as a silica precursor and ammonium hydroxide as catalyst in an alcoholic solvent to promote the seeded silica growth. By simply varying the synthesis reaction time from 4 to 60min, the silica shell thickness is increased from 5.1nm to 76.4nm. This well-controlled synthesis is then transposed to 40, 80 and 100nm sized silver cores in order to show the independence of the silica shell growth on the nanoparticle core size. Optical properties, i.e. localized surface plasmon resonance, of the produced silver-silica core-shell are also investigated.
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Affiliation(s)
- Marjorie Lismont
- GRASP-Biophotonics, Département de Physique, B5a, Université de Liège, B-4000 Liège, Belgium.
| | - Carlos A Páez
- Nanomatériaux, Catalyse et Electrochimie, Département de Chimie Appliquée, Génie chimique, B6a, Université de Liège, B-4000 Liège, Belgium
| | - Laurent Dreesen
- GRASP-Biophotonics, Département de Physique, B5a, Université de Liège, B-4000 Liège, Belgium
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17
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Vilvamani N, Gupta RD, Awasthi SK. Ru(ii)–polypyridyl complex-grafted silica nanohybrids: versatile hybrid materials for Raman spectroscopy and photocatalysis. RSC Adv 2015. [DOI: 10.1039/c4ra14202k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ru(ii)–polypyridyl complex-grafted silica nanohybrids were prepared with and without Ag NP cores, and these materials are demonstrated as substrates for plasmon-based on-resonance Raman scattering studies and as photocatalysts.
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Affiliation(s)
- Narayanasamy Vilvamani
- Chemical Biology Laboratory
- Department of Chemistry
- University of Delhi
- New Delhi-110007
- India
| | - Rinkoo Devi Gupta
- Faculty of Life Sciences and Biotechnology
- South Asian University
- New Delhi-110021
- India
| | - Satish Kumar Awasthi
- Chemical Biology Laboratory
- Department of Chemistry
- University of Delhi
- New Delhi-110007
- India
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18
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Kha NM, Chen CH, Su WN, Rick J, Hwang BJ. Improved Raman and photoluminescence sensitivity achieved using bifunctional Ag@SiO2 nanocubes. Phys Chem Chem Phys 2015; 17:21226-35. [DOI: 10.1039/c4cp05217j] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Surface-enhanced Raman scattering (SERS) and metal-enhanced photoluminescence (MEPL) responses can be greatly improved by introducing a thin coating of silica (SiO2) on silver nanocubes.
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Affiliation(s)
- Nguyen Minh Kha
- NanoElectrochemistry Laboratory
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106
- Taiwan
| | - Ching-Hsiang Chen
- NanoElectrochemistry Laboratory
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Taiwan
| | - Wei-Nien Su
- NanoElectrochemistry Laboratory
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Taiwan
| | - John Rick
- NanoElectrochemistry Laboratory
- Graduate Institute of Applied Science and Technology
- National Taiwan University of Science and Technology
- Taipei 106
- Taiwan
| | - Bing-Joe Hwang
- NanoElectrochemistry Laboratory
- Department of Chemical Engineering
- National Taiwan University of Science and Technology
- Taipei 106
- Taiwan
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19
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Bellissima F, Bonini M, Giorgi R, Baglioni P, Barresi G, Mastromei G, Perito B. Antibacterial activity of silver nanoparticles grafted on stone surface. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:13278-13286. [PMID: 24151026 DOI: 10.1007/s11356-013-2215-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
Microbial colonization has a relevant impact on the deterioration of stone materials with consequences ranging from esthetic to physical and chemical changes. Avoiding microbial growth on cultural stones therefore represents a crucial aspect for their long-term conservation. The antimicrobial properties of silver nanoparticles (AgNPs) have been extensively investigated in recent years, showing that they could be successfully applied as bactericidal coatings on surfaces of different materials. In this work, we investigated the ability of AgNPs grafted to Serena stone surfaces to inhibit bacterial viability. A silane derivative, which is commonly used for stone consolidation, and Bacillus subtilis were chosen as the grafting agent and the target bacterium, respectively. Results show that functionalized AgNPs bind to stone surface exhibiting a cluster disposition that is not affected by washing treatments. The antibacterial tests on stone samples revealed a 50 to 80 % reduction in cell viability, with the most effective AgNP concentration of 6.7 μg/cm(2). To our knowledge, this is the first report on antimicrobial activity of AgNPs applied to a stone surface. The results suggest that AgNPs could be successfully used in the inhibition of microbial colonization of stone artworks.
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Affiliation(s)
- F Bellissima
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Florence, Italy
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20
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Díaz-Faes López T, Díaz-García ME, Badía-Laíño R. Molecularly imprinted silica-silver nanowires for tryptophan recognition. NANOTECHNOLOGY 2014; 25:425705. [PMID: 25277832 DOI: 10.1088/0957-4484/25/42/425705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on silver nanowires (AgNWs) coated with molecularly imprinted silica (MIP SiO2) for recognition of tryptophan (Trp). The use of AgNWs as a template confers an imprinted material with adequate mechanical strength and with a capability of recognizing Trp due to its nanomorphology when compared to spherical microparticles with a similar surface-to-volume ratio. Studies on adsorption isotherms showed the MIP-SiO2-AgNWs to exhibit homogeneous affinity sites with narrow affinity distribution. This suggests that the synthesized material behaves as a 1D nanomaterial with a large area and small thickness with very similar affinity sites. Trp release from MIP-SiO2-AgNWs was demonstrated to be dominated by the diffusion rate of Trp as controlled by the specific interactions with the imprinted silica shell. Considering these results and the lack of toxicity of silica sol-gel materials, the material offers potential in the field of drug or pharmaceutical controlled delivery, but also in optoelectronic devices, electrodes and sensors.
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Affiliation(s)
- T Díaz-Faes López
- Faculty of Chemistry, Department of Physical and Analytical Chemistry, University of Oviedo. Av. Julián Clavería, 8, E-33006 Oviedo, Spain
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21
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Experimental studies on irreversibility of electrostatic adsorption of silica nanoparticles at solid–liquid interface. J Colloid Interface Sci 2014; 420:50-6. [DOI: 10.1016/j.jcis.2013.12.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 12/11/2013] [Accepted: 12/12/2013] [Indexed: 11/19/2022]
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22
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Preparation of saline-stable, silica-coated triangular silver nanoplates of use for optical sensing. J Colloid Interface Sci 2014; 415:77-84. [DOI: 10.1016/j.jcis.2013.10.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 10/02/2013] [Accepted: 10/07/2013] [Indexed: 11/21/2022]
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23
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Quinsaat JEQ, Nüesch FA, Hofmann H, Opris DM. Dielectric properties of silver nanoparticles coated with silica shells of different thicknesses. RSC Adv 2013. [DOI: 10.1039/c3ra23192e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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24
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Saint-Cricq P, Wang J, Sugawara-Narutaki A, Shimojima A, Okubo T. A new synthesis of well-dispersed, core–shell Ag@SiO2 mesoporous nanoparticles using amino acids and sugars. J Mater Chem B 2013; 1:2451-2454. [DOI: 10.1039/c3tb20210k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Spectral interaction between silica coated silver nanoparticles and serum albumins. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.12.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Wang J, Topham N, Wu CY. Determination of silica coating efficiency on metal particles using multiple digestion methods. Talanta 2011; 85:2655-61. [PMID: 21962698 DOI: 10.1016/j.talanta.2011.08.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 08/17/2011] [Accepted: 08/17/2011] [Indexed: 11/26/2022]
Abstract
Nano-sized metal particles, including both elemental and oxidized metals, have received significant interest due to their biotoxicity and presence in a wide range of industrial systems. A novel silica technology has been recently explored to minimize the biotoxicity of metal particles by encapsulating them with an amorphous silica shell. In this study, a method to determine silica coating efficiency on metal particles was developed. Metal particles with silica coating were generated using gas metal arc welding (GMAW) process with a silica precursor tetramethylsilane (TMS) added to the shielding gas. Microwave digestion and Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) were employed to solubilize the metal content in the particles and analyze the concentration, respectively. Three acid mixtures were tested to acquire the appropriate digestion method targeting at metals and silica coating. Metal recovery efficiencies of different digestion methods were compared through analysis of spiked samples. HNO(3)/HF mixture was found to be a more aggressive digestion method for metal particles with silica coating. Aqua regia was able to effectively dissolve metal particles not trapped in the silica shell. Silica coating efficiencies were thus calculated based on the measured concentrations following digestion by HNO(3)/HF mixture and aqua regia. The results showed 14-39% of welding fume particles were encapsulated in silica coating under various conditions. This newly developed method could also be used to examine the silica coverage on particles of silica shell/metal core structure in other nanotechnology areas.
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Affiliation(s)
- Jun Wang
- Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL 32611, USA
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27
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Synthesis and characterization of silver nanoparticle and graphene oxide nanosheet composites as a bactericidal agent for water disinfection. J Colloid Interface Sci 2011; 360:463-70. [DOI: 10.1016/j.jcis.2011.05.009] [Citation(s) in RCA: 351] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Revised: 05/04/2011] [Accepted: 05/04/2011] [Indexed: 11/23/2022]
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