A thin PANI and carrageenan–gold nanoparticle film on a flexible gold electrode as a conductive and low-cost platform for sensing in a physiological environment

Farias, Emanuel Airton de Oliveira; Nogueira, Silvania Siqueira; Farias, Aline Márcia de Oliveira; Oliveira, Monialine Sousa de; Soares, Maria de Fátima Cardoso; Cunha, Helenilza Ferreira Albuquerque; Santos, José Ribeiro dos; Silva, Durcilene Alves da; Eaton, Peter; Eiras, Carla

doi:10.1007/s10853-017-1438-2

Cited by 23 publications

(4 citation statements)

References 64 publications

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“…Nanostructured conducting polymers with excellent properties, such as good electrical conductivity, environmental durability, ease of preparation, and ability to integrate with electronic components, are ideal materials for various applications including nanoelectronic devices, catalysts, electron eld emitters, actuators, membranes, biomedical devices, rechargeable batteries, supercapacitors, sensors, and especially, electrochemical DNA sensors [15][16][17][18][19][20]. In the eld of electrochemical DNA sensors, one-dimensional nanostructures of polyaniline (PANi) including PANi nanowires (PANi NWs), PANi nanotubes, PANi nano bers, and PANi nanorods have attracted research interest due to their large surface area, tunable electrochemical properties, and high biocompatibility [21].…”

Section: Introductionmentioning

confidence: 99%

Electrochemically Effective Surface Area of a Polyaniline Nanowire-Based Platinum Microelectrode and Development of an Electrochemical DNA Sensor

Tran

Cao

et al. 2022

Journal of Nanotechnology

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Electrochemical DNA sensors based on nanocomposite materials of polyaniline nanowires (PANi NWs) have been published in the literature. However, it is interesting that there are very few research studies related to the development of electrochemical DNA sensors based on PANi NWs individually. In this study, PANi NWs were synthesized site-specifically on a Pt microelectrode with only 0.785 mm2 area using an electropolymerization procedure. The electrosynthesis allows direct deposition of PANi NWs onto the Pt microelectrode in a rapid and cost-effective way. The good properties of PANi NWs including uniform size, uniform distribution throughout the Pt working electrode, and H2SO4 doping which improved the conductivity of the PANi material were obtained. Especially, the electrochemically effective surface area of the PANi NW-based Pt microelectrode determined in this work is nearly 19 times larger than that of the Pt working electrode. The PANi NW layer with large electrochemically effective surface area and high biocompatibility is consistent with the application in electrochemical DNA sensors. The fabricated DNA sensors show advantages such as simple fabrication, direct detection, high sensitivity (with the detection limit of 2.48 × 10−14 M), good specificity, and low sample volume requirement. This study also contributes to confirm the role of PANi NWs in DNA probe immobilization as well as in electrochemical signal transmission in the development of electrochemical DNA sensors.

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Section: Introductionmentioning

confidence: 99%

Electrochemically Effective Surface Area of a Polyaniline Nanowire-Based Platinum Microelectrode and Development of an Electrochemical DNA Sensor

Tran

Cao

et al. 2022

Journal of Nanotechnology

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“…Nanostructured conducting polymers, especially nanostructures of polyaniline (PANi), are important due to their ability to combine the properties of low-dimensional organic conductors with high surface areas. [1][2][3] PANi exists in various oxidation states ranging from the most reduced leucoemeraldine form, through the half-oxidized emeraldine base form, to the fully oxidized pernigraniline form (Figure 1), so it is a unique and interesting polymeric material. 4 It is used in diverse applications such as sensors, nano-electronic devices, electron-field emitters, data storage devices, actuators, membranes, rechargeable batteries, supercapacitors, and catalysts.…”

Section: Introductionmentioning

confidence: 99%

A glassy carbon electrode modified with polyaniline nanowires: An electrochemically effective surface area and an electrocatalytic activity for the oxidation of methanol under alkaline conditions

Tran

Cao

et al. 2022

Journal of Chemical Research

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Polyaniline nanowires are directly synthesized on a glassy carbon electrode (3 mm diameter) by an electrochemical process. The polyaniline nanowires, of uniform size, a diameter of 85–95 nm, and high conductivity, distribute evenly throughout the surface of the working electrode. Electrochemical measurements are conducted in order to determine the electrochemically effective surface area of the obtained glassy carbon electrode modified with polyaniline nanowires, and an investigation of the electrocatalytic activity of polyaniline nanowires for the oxidation of methanol under alkaline conditions is carried out. The electrochemically effective surface area of the glassy carbon electrode modified with polyaniline nanowires is nearly 27 times larger than that of a glassy carbon electrode. In a cyclic voltammetry curve of the glassy carbon electrode modified with polyaniline nanowires measured in a 3.0 M CH3OH and 0.5 M KOH solution, an anodic peak corresponding to the oxidation of methanol under alkaline conditions appears at 0.17 V with a peak current of 34.4 μA.

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“…Multifunctional composites of ICP have also been extensively explored as it combines the attributes of conjugated polymer and the reinforcement material giving rise to a synergetic effect, by demonstrating improved properties, which can be utilized for complex biomolecule sensing . Moreover, composites of ICP can arrest agglomeration of nanoparticles due to dispersion in conductive organic matrix and also prevent restacking due to steric hindrance and electrostatic interactions .…”

Section: Introductionmentioning

confidence: 99%

Progress in the Development of Intrinsically Conducting Polymer Composites as Biosensors

Prajapati

Kandasubramanian

2019

Macro Chemistry & Physics

104

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Biosensors are analytical devices which find extensive applications in fields such as the food industry, defense sector, environmental monitoring, and in clinical diagnosis. Similarly, intrinsically conducting polymers (ICPs) and their composites have lured immense interest in bio‐sensing due to their various attributes like compatibility with biological molecules, efficient electron transfer upon biochemical reactions, loading of bio‐reagent, and immobilization of biomolecules. Further, they are proficient in sensing diverse biological species and compounds like glucose (detection limit ≈0.18 nm), DNA (≈10 pm), cholesterol (≈1 µm), aptamer (≈0.8 pm), and also cancer cells (≈5 pm mL−1) making them a potential candidate for biological sensing functions. ICPs and their composites have been extensively exploited by researchers in the field of biosensors owing to these peculiarities; however, no consolidated literature on the usage of conducting polymer composites for biosensing functions is available. This review extensively elucidates on ICP composites and doped conjugated polymers for biosensing functions of copious biological species. In addition, a brief overview is provided on various forms of biosensors, their sensing mechanisms, and various methods of immobilizing biological species along with the life cycle assessment of biosensors for various biosensing applications, and their cost analysis.

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A thin PANI and carrageenan–gold nanoparticle film on a flexible gold electrode as a conductive and low-cost platform for sensing in a physiological environment

Cited by 23 publications

References 64 publications

Electrochemically Effective Surface Area of a Polyaniline Nanowire-Based Platinum Microelectrode and Development of an Electrochemical DNA Sensor

Electrochemically Effective Surface Area of a Polyaniline Nanowire-Based Platinum Microelectrode and Development of an Electrochemical DNA Sensor

A glassy carbon electrode modified with polyaniline nanowires: An electrochemically effective surface area and an electrocatalytic activity for the oxidation of methanol under alkaline conditions

Progress in the Development of Intrinsically Conducting Polymer Composites as Biosensors

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