Electrochemical behavior of Azure A/gold nanoclusters modified electrode and its application as non-enzymatic hydrogen peroxide sensor

Priya, Chandhana Jayachandran; Sivasankari, G.; Narayanan, S. Sriman

doi:10.1016/j.colsurfb.2012.04.004

Cited by 36 publications

(14 citation statements)

References 50 publications

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“…Recently, AuNCs have been reported to act as an electron transfer bridge in the electrochemical sensing of different biomolecules such as glucose, ascorbic acid, uric acid, dopamine, bilirubin, and H 2 O 2 . 155–158 A new finding has demonstrated that the strong fluorescent signal of AuNCs can be sensitively and selectively quenched by ROS, fostering a very promising application field for AuNCs as probes for ROS detection. This new role of AuNCs as analytical tools in the oxidative stress field has been recently reviewed.…”

Section: Gold Nanomaterialsmentioning

confidence: 99%

Redox-active nanomaterials for nanomedicine applications

et al. 2017

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Nanomedicine utilizes the remarkable properties of nanomaterials for the diagnosis, treatment, and prevention of disease. Many of these nanomaterials have been shown to have robust antioxidative properties, potentially functioning as strong scavengers of reactive oxygen species. Conversely, several nanomaterials have also been shown to promote the generation of reactive oxygen species, which may precipitate the onset of oxidative stress, a state that is thought to contribute to the development of a variety of adverse conditions. As such, the impacts of NMs on biological entities are often associated with and influenced by their specific redox properties. In this review, we overview several classes of nanomaterials that have been or projected to be used across a wide range of biomedical applications, with discussion focusing on their unique redox properties. Amongst the nanomaterials examined include iron, cerium, and titanium metal oxide nanoparticles, gold, silver, and selenium nanoparticles, and various nanoscale carbon allotropes such as graphene, carbon nanotubes, fullerenes, and their derivatives/variations. Principal topics of discussion include the chemical mechanisms by which the nanomaterials directly interact with biological entities and the biological cascades that are thus indirectly impacted. Selected case studies highlighting the redox properties of nanomaterials and how they affect biological responses are used to exemplify the biologically-relevant redox mechanisms for each of the described nanomaterials.

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Section: Gold Nanomaterialsmentioning

confidence: 99%

Redox-active nanomaterials for nanomedicine applications

et al. 2017

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“…As in the aforementioned QDs based optical H 2 O 2 sensors, H 2 O 2 alters the surface ligand conditions of AuNCs, which leads to changes in the optical properties of the nanoclusters. Employing a sensing mechanism similar to that of QDs based sensors, AuNCs based electrochemical (Priya et al, 2012) and ECL sensors (Wei et al, 2013) were developed for H 2 O 2 and glucose detection.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent gold nanoclusters based photoelectrochemical sensors for detection of H2O2 and glucose

Zhang

Zhao

et al. 2015

Biosensors and Bioelectronics

106

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“…Hydrogen peroxide (H 2 O 2 ) is a small molecule and plays an important role in different fields including textile industry, food analysis, pharmaceutical research, medical diagnostics, environmental and food analysis [27,28]. It is also widely used in antiseptic and disinfecting agents, cleaning product, propellant in rocket, minerals processes and beverage packages [29,30]. The most commonly available methods for the detection of H 2 O 2 are fluorescence, spectrophotometry, chemiluminescence and electrochemical methods [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

A Graphene/Gelatin Composite Material for the Entrapment of Hemoglobin for Bioelectrochemical Sensing Applications

Thirumalraj

Palanisamy

Chen

et al. 2016

J. Electrochem. Soc.

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In the present work, a novel graphene (GN) and gelatin (GTN) composite was prepared and used as an immobilization matrix for hemoglobin (Hb). Compared with Hb immobilized on a bare, GN or GTN modified glassy carbon electrode (GCE), a stable and pair of well-defined quasi redox couple was observed at an Hb modified GN/GTN composite GCE at a formal potential of -0.306 V versus Ag|AgCl. The direct electrochemical behavior of Hb was greatly enhanced by the presence of both GTN and GN. A heterogeneous electron transfer rate constant (K s ) was calculated as 3.82 s −1 for Hb immobilized at GN/GTN modified GCE, which indicates the fast direct electron transfer of Hb towards the electrode surface. The biosensor shows a stable and wide linear response for H 2 O 2 in the linear response range from 0.1 µM to 786.6 µM with an analytical sensitivity and limit of detection of 0.48 µAµM −1 cm −2 and 0.04 µM, respectively. The fabricated biosensor holds its high selectivity in the presence of potentially active interfering species and metal ions. The biosensor shows its satisfactory practical ability in the commercial contact lens solution and human serum samples.

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Electrochemical behavior of Azure A/gold nanoclusters modified electrode and its application as non-enzymatic hydrogen peroxide sensor

Cited by 36 publications

References 50 publications

Redox-active nanomaterials for nanomedicine applications

Redox-active nanomaterials for nanomedicine applications

Fluorescent gold nanoclusters based photoelectrochemical sensors for detection of H2O2 and glucose

A Graphene/Gelatin Composite Material for the Entrapment of Hemoglobin for Bioelectrochemical Sensing Applications

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