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Guglielmelli A, Mazzei R, Palermo G, Valente L, Tone CM, Giorno L, Strangi G, Poerio T. Development of a Photothermal Regenerative Plasmonic Platform as a Light-Controlled Interface. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39422145 DOI: 10.1021/acsami.4c13455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
This study introduces a novel plasmonic nanocomposite platform, where gold nanoparticles (AuNPs) are synthesized in situ within a polydimethylsiloxane (PDMS) film. The innovative fabrication process leverages ethyl acetate swelling to achieve a uniform distribution of AuNPs, eliminating the need for additional reagents. The resulting nanocomposite film exhibits exceptional photothermal conversion capabilities, efficiently converting absorbed light into heat and rapidly reaching high temperatures. Furthermore, the platform is biofunctionalized with the phosphotriesterase enzyme, not only enabling the degradation of organophosphate pesticides but also showcasing the potential for multifunctional applications. The platform's ability to be regenerated after use underscores its sustainability for repeated applications.
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Affiliation(s)
- Alexa Guglielmelli
- Nanoscience Laboratory for Human Technologies (NLHT) Lab, Department of Physics, Institute of Nanotechnology (CNR-Nanotec), University of Calabria, 87036 Rende, Italy
| | - Rosalinda Mazzei
- Institute on Membrane Technology (ITM-CNR), National Research Council, 87036 Rende, Italy
| | - Giovanna Palermo
- Nanoscience Laboratory for Human Technologies (NLHT) Lab, Department of Physics, Institute of Nanotechnology (CNR-Nanotec), University of Calabria, 87036 Rende, Italy
| | - Liliana Valente
- NLHT Lab, Department of Physics, University of Calabria, 87036 Rende, Italy
| | - Caterina M Tone
- Department of Physics, Molecular Physics Group, University of Calabria, 87036 Rende, Italy
| | - Lidietta Giorno
- Institute on Membrane Technology (ITM-CNR), National Research Council, 87036 Rende, Italy
| | - Giuseppe Strangi
- Nanoscience Laboratory for Human Technologies (NLHT) Lab, Department of Physics, Institute of Nanotechnology (CNR-Nanotec), University of Calabria, 87036 Rende, Italy
- Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Teresa Poerio
- Institute on Membrane Technology (ITM-CNR), National Research Council, 87036 Rende, Italy
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Kumar S, Shandilya M, Uniyal P, Thakur S, Parihar N. Efficacy of polymeric nanofibrous membranes for proficient wastewater treatment. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04417-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nikpour S, Ansari-Asl Z, Sedaghat T, Hoveizi E. Curcumin-loaded Fe-MOF/PDMS porous scaffold: fabrication, characterization, and biocompatibility assessment. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.02.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Scurti S, Monti E, Rodríguez-Aguado E, Caretti D, Cecilia JA, Dimitratos N. Effect of Polyvinyl Alcohol Ligands on Supported Gold Nano-Catalysts: Morphological and Kinetics Studies. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:879. [PMID: 33808449 PMCID: PMC8066135 DOI: 10.3390/nano11040879] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 03/25/2021] [Accepted: 03/27/2021] [Indexed: 01/21/2023]
Abstract
The effect of polyvinyl alcohol (PVA) stabilizers and gold nanoparticles supported on active carbon (AuNPs/AC) was investigated in this article. Polymers with different molecular weights and hydrolysis degrees have been synthesized and used, like the stabilizing agent of Au nano-catalysts obtained by the sol-immobilization method. The reduction of 4-nitrophenol with NaBH4 has been used as a model reaction to investigate the catalytic activity of synthesized Au/AC catalysts. In addition, we report several characterization techniques such as ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) in order to correlate the properties of the polymer with the metal nanoparticle size and the catalytic activity. A volcano plot was observed linking the catalytic performance with hydrolysis degree and the maximum of the curve was identified at a value of 60%. The Au:PVA-60 weight ratio was changed in order to explain how the amount of the polymer can influence catalytic properties. The effect of nitroaromatic ring substituents on the catalytic mechanism was examined by the Hammett theory. Moreover, the reusability of the catalyst was investigated, with little to no decrease in activity observed over five catalytic cycles. Morphological and kinetic studies reported in this paper reveal the effect of the PVA polymeric stabilizer properties on the size and catalytic activity of supported gold nanoparticles.
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Affiliation(s)
- Stefano Scurti
- Industrial Chemistry “Toso Montanari” Department, University of Bologna, Viale Risorgimento 4, 40126 Bologna, Italy; (S.S.); (E.M.)
| | - Eleonora Monti
- Industrial Chemistry “Toso Montanari” Department, University of Bologna, Viale Risorgimento 4, 40126 Bologna, Italy; (S.S.); (E.M.)
| | - Elena Rodríguez-Aguado
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain; (E.R.-A.); (J.A.C.)
| | - Daniele Caretti
- Industrial Chemistry “Toso Montanari” Department, University of Bologna, Viale Risorgimento 4, 40126 Bologna, Italy; (S.S.); (E.M.)
| | - Juan Antonio Cecilia
- Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain; (E.R.-A.); (J.A.C.)
| | - Nikolaos Dimitratos
- Industrial Chemistry “Toso Montanari” Department, University of Bologna, Viale Risorgimento 4, 40126 Bologna, Italy; (S.S.); (E.M.)
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Pinto J, Barroso-Solares S, Magrì D, Palazon F, Lauciello S, Athanassiou A, Fragouli D. Melamine Foams Decorated with In-Situ Synthesized Gold and Palladium Nanoparticles. Polymers (Basel) 2020; 12:polym12040934. [PMID: 32316645 PMCID: PMC7240623 DOI: 10.3390/polym12040934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 01/10/2023] Open
Abstract
A versatile and straightforward route to produce polymer foams with functional surface through their decoration with gold and palladium nanoparticles is proposed. Melamine foams, used as polymeric porous substrates, are first covered with a uniform coating of polydimethylsiloxane, thin enough to assure the preservation of their original porous structure. The polydimethylsiloxane layer allows the facile in-situ formation of metallic Au and Pd nanoparticles with sizes of tens of nanometers directly on the surface of the struts of the foam by the direct immersion of the foams into gold or palladium precursor solutions. The effect of the gold and palladium precursor concentration, as well as the reaction time with the foams, to the amount and sizes of the nanoparticles synthesized on the foams, was studied and the ideal conditions for an optimized functionalization were defined. Gold and palladium contents of about 1 wt.% were achieved, while the nanoparticles were proven to be stably adhered to the foam, avoiding potential risks related to their accidental release.
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Affiliation(s)
- Javier Pinto
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
- Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, University of Valladolid, 47011 Valladolid, Spain
- Correspondence: (J.P.); (D.F.)
| | - Suset Barroso-Solares
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
- Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, University of Valladolid, 47011 Valladolid, Spain
| | - Davide Magrì
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
| | - Francisco Palazon
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;
- Instituto de Ciencia Molecular, Universidad de Valencia, C/Beltrán 2, 46980 Paterna, Spain
| | - Simone Lauciello
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
| | - Athanassia Athanassiou
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
| | - Despina Fragouli
- Smart Materials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy; (S.B.-S.); (D.M.); (S.L.); (A.A.)
- Correspondence: (J.P.); (D.F.)
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Lian Z, Wei C, Gao B, Yang X, Chan Y, Wang J, Chen GZ, Koh KS, Shi Y, Yan Y, Ren Y, He J, Liu F. Synergetic treatment of dye contaminated wastewater using microparticles functionalized with carbon nanotubes/titanium dioxide nanocomposites. RSC Adv 2020; 10:9210-9225. [PMID: 35497220 PMCID: PMC9050075 DOI: 10.1039/c9ra10899h] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 02/23/2020] [Indexed: 12/13/2022] Open
Abstract
The highly efficient treatment of azo dye contaminated wastewater from the textile industry is an important but challenging problem. Herein, polydimethylsiloxane (PDMS) microparticles, incorporating multiple-walled carbon nanotubes/titanium dioxide (MWCNTs/TiO2) nanocomposites, were successfully synthesized to treat wastewater containing Rhodamine B (RhB) dyes in a synergetic approach, by combining sorption and photocatalytic degradation. The surfactant wrapping sol-gel method was applied to synthesize MWCNTs/TiO2 nanocomposites with TiO2 nanoparticles evenly distributed on the surface of the MWCNTs. The PDMS microparticles were fabricated with an oil-in-water (O/W) single emulsion template, using needle-based microfluidic devices. MWCNTs/TiO2 nanocomposites (at a weight ratio of 1%, and 2%, respectively) were mixed with the PDMS precursor as the dispersed phase, and an aqueous solution of polyvinyl alcohol (PVA) was used as the continuous phase. Highly monodispersed microparticles, with average diameters of 692.7 μm (Coefficient of Variation, CV = 0.74%) and 678.3 μm (CV = 1.04%), were formed at an applied flow rate of the dispersed and continuous phase of 30 and 200 μL min-1, respectively. The fabricated hybrid microparticles were employed for the treatment of RhB, involving a dark equilibrium for 5 hours and UV irradiation for 3 hours. The experimental conditions of applied PDMS type, mass loading amount, treatment duration, photodegradation kinetics, initial concentration of pollutants and environmental pH values were investigated in this work. The PDMS microparticles with 2 wt% MWCNTs/TiO2 nanocomposites can exhibit a removal efficiency of 85%. Remarkably, an efficiency of 70% can be retained after the microparticles have been recycled and reused for 3 cycles. The PDMS-MWCNTs/TiO2 microparticles possess a superior performance over conventional treatment approaches for dye contaminated wastewater, especially in recyclability and the prevention of secondary pollution. This work provides a feasible and eco-friendly route for developing an efficient and low-cost microfluidic method for treating complicated water environmental systems.
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Affiliation(s)
- Zheng Lian
- International Doctoral Innovation Centre, University of Nottingham Ningbo China Ningbo China
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China Ningbo China
- Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China Ningbo China
| | - Chaohui Wei
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China Ningbo China
| | - Bin Gao
- ECO Environmental Investment Limited Hong Kong China
| | - Xiaogang Yang
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China Ningbo China
| | - Yue Chan
- Institute for Advanced Study, Shenzhen University Shenzhen China
| | - Jing Wang
- Department of Electrical and Electronic Engineering, University of Nottingham Ningbo China Ningbo China
| | - George Zheng Chen
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China Ningbo China
- Department of Chemical and Environmental Engineering, University of Nottingham Nottingham UK
| | - Kai Seng Koh
- School of Engineering and Physical Sciences, Heriot-Watt University Malaysia Putrajaya Malaysia
| | - Yong Shi
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China Ningbo China
- Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China Ningbo China
| | - Yuying Yan
- Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China Ningbo China
- Research Group for Fluids and Thermal Engineering, University of Nottingham Nottingham UK
| | - Yong Ren
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China Ningbo China
- Research Group for Fluids and Thermal Engineering, University of Nottingham Ningbo China Ningbo China
| | - Jun He
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China Ningbo China
| | - Fu Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo China
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7
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Adiraj Iyer M, Eddington DT. Storing and releasing rhodamine as a model hydrophobic compound in polydimethylsiloxane microfluidic devices. LAB ON A CHIP 2019; 19:574-579. [PMID: 30681692 DOI: 10.1039/c9lc00039a] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Polydimethylsiloxane (PDMS) is a ubiquitous material used in soft lithography and microfluidics. Due to its hydrophobic nature, PDMS tends to absorb small hydrophobic molecules, and is seen as a major disadvantage of the material in pharmaceutical and cell culture studies. While there have been extensive reports of attempts to treat PDMS to limit or block this absorption, little attention has been given to using this property as a feature in microfluidic devices. In this work, we leverage the ability of PDMS to store hydrophobic molecules inside the PDMS matrix and release them over time in a sustained manner.
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Affiliation(s)
- M Adiraj Iyer
- Dept of Bioengineering, University of Illinois at Chicago, Chicago, USA.
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9
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Roper DK, Berry KR, Dunklin JR, Chambers C, Bejugam V, Forcherio GT, Lanier M. Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation. NANOSCALE 2018; 10:11531-11543. [PMID: 29892737 DOI: 10.1039/c8nr00977e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Embedding soft matter with nanoparticles (NPs) can provide electromagnetic tunability at sub-micron scales for a growing number of applications in healthcare, sustainable energy, and chemical processing. However, the use of NP-embedded soft material in temperature-sensitive applications has been constrained by difficulties in validating the prediction of rates for energy dissipation from thermally insulating to conducting behavior. This work improved the embedment of monodisperse NPs to stably decrease the inter-NP spacings in polydimethylsiloxane (PDMS) to nano-scale distances. Lumped-parameter and finite element analyses were refined to apportion the effects of the structure and composition of the NP-embedded soft polymer on the rates for conductive, convective, and radiative heat dissipation. These advances allowed for the rational selection of PDMS size and NP composition to optimize measured rates of internal (conductive) and external (convective and radiative) heat dissipation. Stably reducing the distance between monodisperse NPs to nano-scale intervals increased the overall heat dissipation rate by up to 29%. Refined fabrication of NP-embedded polymer enabled the tunability of the dynamic thermal response (the ratio of internal to external dissipation rate) by a factor of 3.1 to achieve a value of 0.091, the largest reported to date. Heat dissipation rates simulated a priori were consistent with 130 μm resolution thermal images across 2- to 15-fold changes in the geometry and composition of NP-PDMS. The Nusselt number was observed to increase with the fourth root of the Rayleigh number across thermally insulative and conductive regimes, further validating the approach. These developments support the model-informed design of soft media embedded with nano-scale-spaced NPs to optimize the heat dissipation rates for evolving temperature-sensitive diagnostic and therapeutic modalities, as well as emerging uses in flexible bioelectronics, cell and tissue culture, and solar-thermal heating.
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Affiliation(s)
- D Keith Roper
- Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
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10
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Regeneration and reuse of polymeric nanocomposites in wastewater remediation: the future of economic water management. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2403-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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11
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A solid colorimetric sensor for the analysis of amphetamine-like street samples. Anal Chim Acta 2016; 943:123-130. [PMID: 27769371 DOI: 10.1016/j.aca.2016.09.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/10/2016] [Accepted: 09/16/2016] [Indexed: 11/23/2022]
Abstract
A solid sensor obtained by embedding 1,2-naphthoquinone-4-sulfonate (NQS) into polydimethylsiloxane/tetraethylortosilicate/silicon dioxide nanoparticles composite has been developed to identify and determine amphetamine (AMP), methamphetamine (MAMP), 3,4-methylenedioxymetamphetamine (MDMA) and 3,4-methylenedioxyamphetamine (MDA). The analytes are derivatized inside the composite for 10 min to create a colored product which can be then quantified by measuring the diffuse reflectance or the color intensity after processing the digitalized image. Satisfactory limits of detection (0.002-0.005 g mL-1) and relative standard deviations (<10%) have been achieved. The proposed kit has been successfully validated and applied to the analysis of amphetamine-like drugs street samples. The kit allows the in-situ screening of the mentioned illicit drugs owing to its simplicity, rapidity and portability, with excellent sensor stability and at a very low-cost.
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12
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Argente-García A, Muñoz-Ortuño M, Molins-Legua C, Moliner-Martínez Y, Campíns-Falcó P. A solid device based on doped hybrid composites for controlling the dosage of the biocide N-(3-aminopropyl)-N-dodecyl-1,3-propanediamine in industrial formulations. Talanta 2016; 147:147-54. [DOI: 10.1016/j.talanta.2015.09.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 09/15/2015] [Accepted: 09/20/2015] [Indexed: 11/16/2022]
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13
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Berean KJ, Adetutu EM, Zhen Ou J, Nour M, Nguyen EP, Paull D, Mcleod J, Ramanathan R, Bansal V, Latham K, Bishop-Hurley GJ, McSweeney C, Ball AS, Kalantar-Zadeh K. A unique in vivo approach for investigating antimicrobial materials utilizing fistulated animals. Sci Rep 2015; 5:11515. [PMID: 26098413 PMCID: PMC4476420 DOI: 10.1038/srep11515] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 05/28/2015] [Indexed: 12/28/2022] Open
Abstract
Unique in vivo tests were conducted through the use of a fistulated ruminant, providing an ideal environment with a diverse and vibrant microbial community. Utilizing such a procedure can be especially invaluable for investigating the performance of antimicrobial materials related to human and animal related infections. In this pilot study, it is shown that the rumen of a fistulated animal provides an excellent live laboratory for assessing the properties of antimicrobial materials. We investigate microbial colonization onto model nanocomposites based on silver (Ag) nanoparticles at different concentrations into polydimethylsiloxane (PDMS). With implantable devices posing a major risk for hospital-acquired infections, the present study provides a viable solution to understand microbial colonization with the potential to reduce the incidence of infection through the introduction of Ag nanoparticles at the optimum concentrations. In vitro measurements were also conducted to show the validity of the approach. An optimal loading of 0.25 wt% Ag is found to show the greatest antimicrobial activity and observed through the in vivo tests to reduce the microbial diversity colonizing the surface.
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Affiliation(s)
- Kyle J Berean
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia, 3000
| | - Eric M Adetutu
- School of Applied Science, RMIT University, Bundoora, Australia, 3083
| | - Jian Zhen Ou
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia, 3000
| | - Majid Nour
- School of Electrical &Computer Engineering, King Abdulaziz University, Jeddah, Saudi Arabia, 22254
| | - Emily P Nguyen
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia, 3000
| | - David Paull
- CSIRO Agriculture, Armidale, Australia, 2350
| | - Jess Mcleod
- CSIRO Agriculture, Armidale, Australia, 2350
| | - Rajesh Ramanathan
- School of Applied Science, RMIT University, Melbourne, Australia, 3000
| | - Vipul Bansal
- School of Applied Science, RMIT University, Melbourne, Australia, 3000
| | - Kay Latham
- School of Applied Science, RMIT University, Melbourne, Australia, 3000
| | | | | | - Andrew S Ball
- School of Applied Science, RMIT University, Bundoora, Australia, 3083
| | - Kourosh Kalantar-Zadeh
- School of Electrical and Computer Engineering, RMIT University, Melbourne, Australia, 3000
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Applications of micro/nanoparticles in microfluidic sensors: a review. SENSORS 2014; 14:6952-64. [PMID: 24755517 PMCID: PMC4029640 DOI: 10.3390/s140406952] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 04/04/2014] [Accepted: 04/10/2014] [Indexed: 12/22/2022]
Abstract
This paper reviews the applications of micro/nanoparticles in microfluidics device fabrication and analytical processing. In general, researchers have focused on two properties of particles--electric behavior and magnetic behavior. The applications of micro/nanoparticles could be summarized on the chip fabrication level and on the processing level. In the fabrication of microfluidic chips (chip fabrication level), particles are good additives in polydimethylsiloxane (PDMS) to prepare conductive or magnetic composites which have wide applications in sensors, valves and actuators. On the other hand, particles could be manipulated according to their electric and magnetic properties under external electric and magnetic fields when they are travelling in microchannels (processing level). Researchers have made a great progress in preparing modified PDMS and investigating the behaviors of particles in microchannels. This article attempts to present a discussion on the basis of particles applications in microfluidics.
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15
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Byeon JH, Kim YW. Gas-phase self-assembly of soft nanocomposites for efficient gene transfection and photothermal therapy. J Mater Chem B 2014; 2:3185-3189. [DOI: 10.1039/c4tb00271g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Dunklin JR, Forcherio GT, Berry KR, Roper DK. Asymmetric reduction of gold nanoparticles into thermoplasmonic polydimethylsiloxane thin films. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8457-66. [PMID: 23931658 DOI: 10.1021/am4018785] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Polymer thin films containing gold nanoparticles (AuNPs) are of growing interest in photovoltaics, biomedicine, optics, and nanoelectromechanical systems (NEMs). This work has identified conditions to rapidly reduce aqueous hydrogen tetrachloroaurate (TCA) that is diffusing into one exposed interface of a partially cured polydimethylsiloxane (PDMS) thin film into AuNPs. Nanospheroids, irregular gold (Au) networks, and micrometer-sized Au conglomerates were formed in a ∼5 μm layer at dissolved TCA contents of 0.005, 0.05, and 0.5 mass percent, respectively. Multiscale morphological, optical, and thermal properties of the resulting asymmetric AuNP-PDMS thin films were characterized. Reduction of TCA diffusing into the interface of partially cured PDMS film increased AuNP content, robustness, and scalability relative to laminar preparation of asymmetric AuNP-PDMS thin films. Optical attenuation and thermoplasmonic film temperature due to incident resonant irradiation increased in linear proportion to the order of magnitude increases in TCA content, from 0.005 to 0.05 to 0.5 mass percent. At the highest TCA content (0.05 mass percent), an asymmetric PDMS film 52-μm-thick with a 7 μm AuNP-containing layer was produced. It attenuated 85% of 18 mW of incident radiation and raised the local temperature to 54.5 °C above ambient. This represented an increase of 3 to 230-fold in photon-to-heat efficiency over previous thermoplasmonic AuNP-containing systems.
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Affiliation(s)
- Jeremy R Dunklin
- Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
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17
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Roper DK. Self-Assembly of Nanodroplets in Nanocomposite Materials in Nanodroplets Science and Technology. LECTURE NOTES IN NANOSCALE SCIENCE AND TECHNOLOGY 2013. [DOI: 10.1007/978-1-4614-9472-0_4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
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18
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Berry KR, Russell AG, Blake PA, Keith Roper D. Gold nanoparticles reduced in situ and dispersed in polymer thin films: optical and thermal properties. NANOTECHNOLOGY 2012; 23:375703. [PMID: 22922704 DOI: 10.1088/0957-4484/23/37/375703] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Optical and thermal activity of plasmon-active nanoparticles in transparent dielectric media is of growing interest in thermal therapies, photovoltaics and optoelectronic components in which localized surface plasmon resonance (LSPR) could play a significant role. This work compares a new method to embed gold nanoparticles (AuNPs) in dense, composite films with an extension of a previously introduced method. Microscopic and spectroscopic properties of the two films are related to thermal behavior induced via laser excitation of LSPR at 532 nm in the optically transparent dielectric. Gold nanoparticles were incorporated into effectively nonporous 680 μm thick polydimethylsiloxane (PDMS) films by (1) direct addition of organic-coated 16 nm nanoparticles; and (2) reduction of hydrogen tetrachloroaurate (TCA) into AuNPs. Power loss at LSPR excitation frequency and steady-state temperature maxima at 100 mW continuous laser irradiation showed corresponding increases with respect to the mass of gold introduced into the PDMS films by either method. Measured rates of temperature increase were higher for organic-coated NP, but higher gold content was achieved by reducing TCA, which resulted in larger overall temperature changes in reduced AuNP films.
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Affiliation(s)
- Keith R Berry
- Ralph E Martin Department of Chemical Engineering, 3202 Bell Engineering Center, University of Arkansas, Fayetteville, AR 72701, USA
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Surface modification for PDMS-based microfluidic devices. Electrophoresis 2011; 33:89-104. [DOI: 10.1002/elps.201100482] [Citation(s) in RCA: 233] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 10/04/2011] [Accepted: 10/04/2011] [Indexed: 11/07/2022]
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Gupta R, Kulkarni GU. Removal of organic compounds from water by using a gold nanoparticle-poly(dimethylsiloxane) nanocomposite foam. CHEMSUSCHEM 2011; 4:737-43. [PMID: 21567977 DOI: 10.1002/cssc.201000410] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 01/30/2011] [Indexed: 05/23/2023]
Abstract
A low density, highly compressible, porous foam of poly(dimethylsiloxane) (PDMS) incorporated with Au nanoparticles (10-50 nm) has been synthesized by using a single-step process with water as a medium. It exhibits high swelling ability (≈600%) against benzene, toluene, ethylbenzene, and xylene (BTEX)-a property that has been exploited in the removal of oil spills from water. It is resistant to harsh chemical environments. It is also effective against odorous sulfur containing contaminants such as thioanisole. It works repeatedly and efficiently over many cycles. The regeneration of the foam is rather simple: heating in air to 300 °C for short time brings back its original activity. The fascinating properties of Au nanoparticles could be mingled with those of PDMS to provide a sustainable and practical solution for water treatment. It is also demonstrated to work effectively for deodorizing garlic extract with a promise as a food packaging material.
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Affiliation(s)
- Ritu Gupta
- Chemistry and Physics of Materials Unit, DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560064 Bangalore, India
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