Sol-Gel-Derived Prussian Blue-Silicate Amperometric Glucose Biosensor

Bharathi, Subramanian; Lev, Ovadia

doi:10.1385/abab:89:2-3:209

Cited by 26 publications

(17 citation statements)

References 18 publications

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“…A PB-doped silicate film was prepared according to the procedure described by Baharati et al [32]. One mL of MTEOS and 1 mL of methanol were mixed.…”

Section: Pb-doped Silicate Glassy Carbon (Pbdsgc) Electrodementioning

confidence: 99%

“…It seems as though the mobility of counter ions controls the rate of the overall redox process. In the case of the PBDSGC electrode it has been suggested that the PB dopant forms a continuum within the inorganic silicate matrix through the interconnected porous structure of the silicate film [32]. It seems that production of non-regular crystalline PB deepen into the insulating silicate matrix is responsible for the decline of the diffusion coefficient of charges in the inorganic redox salt resulting in an increase in DE p and observation of a low current intensity.…”

Section: Studiesmentioning

confidence: 99%

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Effect of Various Deposition Techniques, Electrode Materials and Posttreatment with Tetrabutylammonium and Tetrabutylphosphonium Salts on the Electrochemical Behavior and Stability of Various Prussian Blue Modified Electrodes

2007

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The effect of various deposition techniques, electrode materials and posttreatment with tetrabutylammonium and tetrabutylphosphonium salts on the electrochemical behavior and stability of various Prussian blue (PB) modified electrodes, namely PB modified glassy carbon electrodes, silicate-film supported PB modified glassy carbon electrodes, PB-doped silicate glassy carbon electrodes, PB modified carbon ceramic electrodes using electrochemical deposition and PB modified carbon ceramic electrodes using chemical deposition is reported. Cyclic voltammetry and amperometric measurements of hydrogen peroxide were performed in a flow injection system while the carrier phosphate buffer (pH 7.0) with a flow rate of 0.8 mL min À1 was propelled into the electrochemical flow through cell housing the PB modified working electrode as well as an Ag j AgCl j 0.1 M KCl reference and a Pt auxiliary electrode. The results showed that the deposition procedure, electrode material and posttreatment with additional chemicals can significantly alter the stability and electrochemical behavior of the PB film. Among the studied PB modified electrodes, those based on carbon ceramic electrodes modified with a film of electropolymerized PB showed the best electrochemical stability.

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“…A PB-doped silicate film was prepared according to the procedure described by Baharati et al [32]. One mL of MTEOS and 1 mL of methanol were mixed.…”

Section: Pb-doped Silicate Glassy Carbon (Pbdsgc) Electrodementioning

confidence: 99%

Section: Studiesmentioning

confidence: 99%

Effect of Various Deposition Techniques, Electrode Materials and Posttreatment with Tetrabutylammonium and Tetrabutylphosphonium Salts on the Electrochemical Behavior and Stability of Various Prussian Blue Modified Electrodes

2007

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“…Maduraiveeran and Ramaraj 2007a, b;Zhang et al 2015). The silica-based materials have been employed for the modification of the electrode surface among the wide range of materials, and they have attracted considerable attention for chemical and biological catalytic and sensing because of the high reactivity of the surface silane, groups, tunable porosity, high thermal stability, and chemical inertness, enabling the immobilization of different molecules through silane coupling chemistry (Bharathi and Lev 2000;Maduraiveeran and Ramaraj 2007a, b). In the 1980s, the sol-gel chemistry has been utilized for the fabrication of the modified metal such as gold (Au), platinum (Pt), and silver (Ag) interfaces (Gong et al 2014, Jena and Raj 2015, Sampath and Lev 1996.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticle-based sensing platform of hydrazine, sulfite, and nitrite for food safety and environmental monitoring

Maduraiveeran

Ramaraj

2017

J Anal Sci Technol

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Background: A facile and sensitive electrochemical sensor platform has been explored based on gold nanoparticles (Au NPs) dispersed in amine-functionalized three-dimensional (3D) silicate sol-gel network for ((aminopropyl)triethoxysilane (APS)-Au NPs) for multi-analytes such as hydrazine, sulfite, and nitrite. Methods: Au NPs dispersed silicate network was prepared via a single-step chemical reduction strategy. The Au NPsbased sensor platform was fabricated through drop-cast on a glassy carbon (GC) electrode. Results: The fabricated APS-Au NPs-based sensor was characterized by ultraviolet-visible (UV-Vis) spectroscopy, cyclic voltammetry (CV), and scanning electrochemical microscopy (SEM). The resultant sensor was employed for the electrocatalytic and sensor applications towards hydrazine, sulfite, and nitrite in 0.1 M phosphate buffer (PB) (pH 7.2). The APS-Au NPs sensor exhibited an excellent catalytic activity in the absence of any other electron transfer mediators/enzyme immobilized at the electrode surface. The electrocatalytic oxidation of hydrazine, sulfite, and nitrite occurs at~40,~170, and~550 mV, respectively, which is lesser positive potential of~810,~735, and~393 mV for the oxidation of hydrazine, sulfite, and nitrite, respectively, than that of the bare GC electrode. Moreover, the present sensor showed low detection limits of 10 nM, 100 nM, and 1 μM for hydrazine, sulfite, and nitrite respectively. Conclusions: APS-Au NPs sensor highlights the successful design for sensitive detection of multi-target analytes for food safety and environmental monitoring applications.

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“…Operational stability of the PB can be improved by covering its surface with polymer films [21–22], by entrapment of the catalysts into sol–gel [23–25], and by conductive polymer matrixes [26–27]. In [20] we have demonstrated a novel approach for the stabilization of a sensor based on mixed iron-nickel hexacyanoferrates.…”

Section: Introductionmentioning

confidence: 99%

Ultramicrosensors based on transition metal hexacyanoferrates for scanning electrochemical microscopy

Komkova¹,

Holzinger²,

Hartmann³

et al. 2013

Beilstein J. Nanotechnol.

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SummaryWe report here a way for improving the stability of ultramicroelectrodes (UME) based on hexacyanoferrate-modified metals for the detection of hydrogen peroxide. The most stable sensors were obtained by electrochemical deposition of six layers of hexacyanoferrates (HCF), more specifically, an alternating pattern of three layers of Prussian Blue and three layers of Ni–HCF. The microelectrodes modified with mixed layers were continuously monitored in 1 mM hydrogen peroxide and proved to be stable for more than 5 h under these conditions. The mixed layer microelectrodes exhibited a stability which is five times as high as the stability of conventional Prussian Blue-modified UMEs. The sensitivity of the mixed layer sensor was 0.32 A·M−1·cm−2, and the detection limit was 10 µM. The mixed layer-based UMEs were used as sensors in scanning electrochemical microscopy (SECM) experiments for imaging of hydrogen peroxide evolution.

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Sol-Gel-Derived Prussian Blue-Silicate Amperometric Glucose Biosensor

Cited by 26 publications

References 18 publications

Effect of Various Deposition Techniques, Electrode Materials and Posttreatment with Tetrabutylammonium and Tetrabutylphosphonium Salts on the Electrochemical Behavior and Stability of Various Prussian Blue Modified Electrodes

Effect of Various Deposition Techniques, Electrode Materials and Posttreatment with Tetrabutylammonium and Tetrabutylphosphonium Salts on the Electrochemical Behavior and Stability of Various Prussian Blue Modified Electrodes

Gold nanoparticle-based sensing platform of hydrazine, sulfite, and nitrite for food safety and environmental monitoring

Ultramicrosensors based on transition metal hexacyanoferrates for scanning electrochemical microscopy

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