One-pot synthesis of a polyaniline–gold nanocomposite and its enhanced electrochemical properties for biosensing applications

Soni, Amrita; Pandey, Chandra Mouli; Solanki, Shipra; Sumana, Gajjala

doi:10.1039/c5ra06146f

Cited by 23 publications

(9 citation statements)

References 45 publications

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“…The diffusion coefficient of electroactive species, from the bulk solution to the electrode's surface, will depend on the electrode's shape, size, and material. 28,29 In this work, all three membranes are made of the same material; however, as shown in the SEM, the shape and the size of the conductive material vary among them. The 8.8 mL/cm 2 ratio has the highest diffusion coefficient and slope at the i p /ν 1/2 , suggesting that the redox probe diffuses freely and faster within the polymeric layer (see the Supporting Information, Figure S2).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Cruz-Tato

Rivera-Fuentes

Flynn

et al. 2019

ACS Appl. Polym. Mater.

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Forward osmosis (FO) has been emerging and gaining attention within the membrane-based processes because it can achieve high water fluxes while minimizing energy consumption, making it a cost-effective approach for wastewater treatment. However, membrane fouling remains an obstacle to this application. To address this concern, we fabricated an electroconductive membrane composed of polysulfone and polyaniline (PAni). These membranes have the potential to oxidize targeted organic compounds and/or electrostatically remove the fouling layer. After optimizing the PAni loading, we performed bench-scale tests using sodium alginate as model foulant. The membranes were fouled resulting in a decrease in FO efficiency of 72%. Fouled membranes were treated with a cathodic potential for 30 min, the fouling and antifouling processes were monitored with scanning electron microscopy (SEM), and contact angle and electrochemical methods were used. The fouled membrane exhibited a clogged surface and high electrical resistance, while the treated membrane recovered the PAni nanofibers morphology, its electrical and hydrophilic properties, and 84% of its FO efficiency. Thus, PAni can improve the overall membrane permeability while incorporating antifouling properties. Moreover, the EIS results of this study shed light on the mechanisms that govern the water separation process before and after fouling in the FO mode.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Cruz-Tato

Rivera-Fuentes

Flynn

et al. 2019

ACS Appl. Polym. Mater.

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“…Nanocomposite materials could combine the merits of different materials to exhibit improved and synergetic behavior. Therefore, PANI/noble metal nanocomposite would be a good way to exploit exceptional behavior of conducting polymers along with attractive characteristics of noble metal nanoparticles . PANI/Cu nanocomposites have been studied, aiming to produce materials with enhanced antibacterial activity, sensitivity, electrochemical activity, and so on, alongside improved electrical conductivity in comparison with pristine PANI .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, PANI/noble metal nanocomposite would be a good way to exploit exceptional behavior of conducting polymers along with attractive characteristics of noble metal nanoparticles. 24,25 PANI/Cu nanocomposites have been studied, aiming to produce materials with enhanced antibacterial activity, sensitivity, electrochemical activity, and so on, [26][27][28] alongside improved electrical conductivity in comparison with pristine PANI. 29 Therefore, these improved properties could be used to make PANI/Cu nanocomposites a good choice to be used as an additive in the production of multifunctional antibacterial and antistatic organic coatings.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of PANI/Cu/TiO₂ternary nanocomposite on antibacterial and antistatic behaviors in polyurethane coatings

Mirmohseni

Rastgar

Olad

2020

J of Applied Polymer Sci

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Surfaces with antibacterial and antistatic functionalities are one of the new demands of todays' industry. Therefore, a facile method for the preparation of multifunctional polyaniline/copper/TiO2 (PANI/Cu/TiO2) ternary nanocomposite based on in situ polymerization is presented. This nanocomposite was characterized through the different techniques and was utilized for induction of antibacterial and antistatic properties in polyurethane coatings. Measurement of the conductivity of PANI/Cu/TiO2 ternary nanocomposite indicated higher electrical conductivity of this nanocomposite compared to pure PANI. The antibacterial activity of the modified polyurethane coatings was tested against Gram‐positive and Gram‐negative bacteria which led to remarkable reduction in bacterial growth. Besides, it was observed that polyurethane coating with 2 wt % content of ternary nanocomposite has a surface electrical resistance equal 4 × 108 Ω/sq which acquires surface electrical resistance of standard antistatic coatings. The final coatings were also characterized in terms of thermal and mechanical properties to investigate the effect of the ternary nanocomposite on improvement of these properties. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48825.

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“…PANI is used for catalysis [ 54 , 55 ], fuel cells [ 56 , 57 ], solar cells [ 58 ], supercapacitors [ 59 ], sensors [ 60 ], corrosion protection [ 61 ], printing inks [ 62 ], rechargeable batteries [ 63 ] and the list goes on. PANI has been incorporated in nanocomposites with graphene [ 64 , 65 ], carbon nanotubes [ 66 , 67 ], metals [ 68 , 69 , 70 , 71 ], metal oxides [ 72 , 73 , 74 ], metal sulfides [ 75 , 76 , 77 ] and many other materials. Focusing on PANI incorporation with TMDCs, MoS 2 -PANI nanocomposites have been prepared by in-situ procedures [ 78 , 79 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites

Sade

Lellouche

2018

Nanomaterials

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Two tungsten disulfide (WS2)-based core-shell nanocomposites were fabricated using readily available reagents and simple procedures. The surface was pre-treated with a surfactant couple in a layer-by-layer approach, enabling good dispersion of the WS2 nanostructures in aqueous media and providing a template for the polymerization of a silica (SiO2) shell. After a Stöber-like reaction, a conformal silica coating was achieved. Inspired by the resulting nanocomposite, a second one was prepared by reacting the surfactant-modified WS2 nanostructures with aniline and an oxidizing agent in an aqueous medium. Here too, a conformal coating of polyaniline (PANI) was obtained, giving a WS2@PANI nanocomposite. Both nanocomposites were analyzed by electron microscopy, energy dispersive X-ray spectroscopy (EDS) and FTIR, verifying the core-shell structure and the character of shells. The silica shell was amorphous and mesoporous and the surface area of the composite increases with shell thickness. Polyaniline shells slightly differ in their morphologies dependent on the acid used in the polymerization process and are amorphous like the silica shell. Electron paramagnetic resonance (EPR) spectroscopy of the WS2@PANI nanocomposite showed variation between bulk PANI and the PANI shell. These two nanocomposites have great potential to expand the use of transition metals dichalcogenides (TMDCs) for new applications in different fields.

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One-pot synthesis of a polyaniline–gold nanocomposite and its enhanced electrochemical properties for biosensing applications

Abstract: One pot synthesis of a polyaniline-gold (PANI-Au) nanocomposite has been conducted using a chemical

Cited by 23 publications

References 45 publications

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Effectiveness of PANI/Cu/TiO₂ternary nanocomposite on antibacterial and antistatic behaviors in polyurethane coatings

Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites

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One-pot synthesis of a polyaniline–gold nanocomposite and its enhanced electrochemical properties for biosensing applications

Abstract: One pot synthesis of a polyaniline-gold (PANI-Au) nanocomposite has been conducted using a chemical

Cited by 23 publications

References 45 publications

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Effectiveness of PANI/Cu/TiO2ternary nanocomposite on antibacterial and antistatic behaviors in polyurethane coatings

Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites

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Effectiveness of PANI/Cu/TiO₂ternary nanocomposite on antibacterial and antistatic behaviors in polyurethane coatings