Graphene/AuNPs/chitosan nanocomposites film for glucose biosensing

Shan, Changsheng; Yang, Huafeng; Han, Dongxue; Zhang, Qixian; Ivaska, Ari; Niu, Li

doi:10.1016/j.bios.2009.09.024

Cited by 742 publications

(335 citation statements)

References 49 publications

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“…The linear range spanned the concentration of glucose from 1.0 × 10 -6 to 4.6 × 10 -3 M with a correlation coefficient of 0.998, and a low detection limit of 0.5 μM at a signal-to-noise ratio of 3. Its sensitivity was 63.8 mA M -1 cm -2 , which was much higher than that of glucose biosensor based on ZrO2/chitosan/GOx (22.3 mA M -1 cm -2 ), 27 Graphene/AuNPs/ GOx/Chitosan (17.5 mA M -1 cm -2 ), 28 and GOx/(AuNPs/ MWCNT) 5 (19.3 mA M -1 cm -2 ). 29 This analytical performance of the proposed CNS/SA/GOx electrode was also compared with those reported in the literature for the GOx-based biosensors using other matrixes ( Table 1).…”

Section: Amperometric Biosensor Detection Of Glucosementioning

confidence: 80%

Development of Highly Sensitive Amperometric Biosensor for Glucose Using Carbon Nanosphere/Sodium Alginate Composite Matrix for Enzyme Immobilization

Han

Cai

et al. 2014

ANAL. SCI.

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In this study, we developed a highly sensitive amperometric biosensor for glucose detection based on glucose oxidase immobilized in a novel carbon nanosphere (CNS)/sodium alginate (SA) composite matrix. This hybrid material combined the advantages of CNS and natural biopolymer SA. This composite film was characterized by scanning electron microscope, electrochemical impedance spectroscopy and UV-vis, which indicated that the hybrid material was suitable for immobilization of glucose oxidase. Various experimental conditions were investigated that influenced the performance of the biosensor, such as pH, applied potential and temperature. Under the optimum conditions, the biosensor showed excellent performance for glucose over a wide linear concentration range from 1.0 × 10 -6 to 4.6 × 10 -3 M with a detection limit of 0.5 μM based on a signal-to-noise ratio of 3. Furthermore, the biosensor exhibited excellent long-term stability and satisfactory reproducibility.

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Section: Amperometric Biosensor Detection Of Glucosementioning

confidence: 80%

Development of Highly Sensitive Amperometric Biosensor for Glucose Using Carbon Nanosphere/Sodium Alginate Composite Matrix for Enzyme Immobilization

Han

Cai

et al. 2014

ANAL. SCI.

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“…The main disadvantages of the bienzymatic biosensor are the instability due to the presence of two enzymes and the difficulty in the binding of peroxidases onto solid surfaces [3]. With the advent of nanotechnology, an interest was focused on developing new nanomaterials and to employ them for an improved sensor sensitivity and for a preservation of the native structure of the enzyme when immobilized onto the electrode surface [18][19][20][21][22][23][24][25]. In particular, more recent studies demonstrate that the electrode modification with metal nanoparticles such as gold [4,13,14] or platinum [15][16][17] decreases the overpotential for the detection of H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

A bimetallic nanocoral Au decorated with Pt nanoflowers (bio)sensor for H2O2 detection at low potential

Sanzò

Taurino

Puppo

et al. 2017

Methods

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a b s t r a c tIn this work, we have developed for the first time a method to make novel gold and platinum hybrid bimetallic nanostructures differing in shape and size. Au-Pt nanostructures were prepared by electrodeposition in two simple steps. The first step consists of the electrodeposition of nanocoral Au onto a gold substrate using hydrogen as a dynamic template in an ammonium chloride solution. After that, the Pt nanostructures were deposited onto the nanocoral Au organized in pores. Using Pt (II) and Pt (IV), we realized nanocoral Au decorated with Pt nanospheres and nanocoral Au decorated with Pt nanoflowers, respectively. The bimetallic nanostructures showed better capability to electrochemically oxidize hydrogen peroxide compared with nanocoral Au. Moreover, Au-Pt nanostructures were able to lower the potential of detection and a higher performance was obtained at a low applied potential. Then, glucose oxidase was immobilized onto the bimetallic Au-Pt nanostructure using cross-linking with glutaraldehyde. The biosensor was characterized by chronoamperometry at +0.15 V vs. Ag pseudo-reference electrode (PRE) and showed good analytical performances with a linear range from 0.01 to 2.00 mM and a sensitivity of 33.66 mA/mM cm 2 . The good value of K m app (2.28 mM) demonstrates that the hybrid nanostructure is a favorable environment for the enzyme. Moreover, the low working potential can minimize the interference from ascorbic acid and uric acid as well as reducing power consumption to effect sensing. The simple procedure to realize this nanostructure and to immobilize enzymes, as well as the analytical performances of the resulting devices, encourage the use of this technology for the development of biosensors for clinical analysis.

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“…Gold nanomaterials have the unique properties such as facilitating electron transfer between the species and electrode [27][28][29]. Gold nanostructures are more diverse, such as flowers [30] and rods [31].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical determination of iron in coastal waters based on ionic liquid-reduced graphene oxide supported gold nanodendrites

Pan

Lin

et al. 2015

Electrochimica Acta

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A B S T R A C TAn effective and sensitive method for electrochemical determination of iron was reported, based on the ionic liquid-reduced graphene oxide (IL-rGO) supported gold nanodendrites (AuNDs). IL-rGO as a soft support could provide large specific surface area for AuNDs and make them smaller sizes and unique forms, which would benefit to the electrochemical reduction of iron. Nafion is employed as a cation exchange polymer in which IL-rGO and AuNDs can be tightly attached to the electrode surface. The proposed sandwich structured IL-rGO/AuNDs/Nafion modified electrode shows excellent electrochemical properties. The IL-rGO/AuNDs/Nafion modified electrode combined individual advantages as a whole and showed good responses for iron ions. Under the optimized conditions, the reduction peak currents of iron have a good linear relation with its concentrations ranging from 0.30 to 100 mmol L À1 with the detection limit of 35 nmol L À1 . More importantly, this sandwich structured modified electrode had a good anti-interference ability and successfully applied in the determination of the total dissolved iron in coastal waters.

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Graphene/AuNPs/chitosan nanocomposites film for glucose biosensing

Cited by 742 publications

References 49 publications

Development of Highly Sensitive Amperometric Biosensor for Glucose Using Carbon Nanosphere/Sodium Alginate Composite Matrix for Enzyme Immobilization

Development of Highly Sensitive Amperometric Biosensor for Glucose Using Carbon Nanosphere/Sodium Alginate Composite Matrix for Enzyme Immobilization

A bimetallic nanocoral Au decorated with Pt nanoflowers (bio)sensor for H2O2 detection at low potential

Electrochemical determination of iron in coastal waters based on ionic liquid-reduced graphene oxide supported gold nanodendrites

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