One pot synthesis of poly(5-hydroxyl-1,4-naphthoquinone) stabilized gold nanoparticles using the monomer as the reducing agent for nonenzymatic electrochemical detection of glucose

Cooray, M. C. Dilusha; Liu, Yuping; Langford, Steven J.; Bond, Alan M.

doi:10.1016/j.aca.2014.11.033

Cited by 15 publications

(8 citation statements)

References 42 publications

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“…As a result, considerable attention has been paid to develop the methods based on enzyme-free electrodes (Hu et al, 2014;Ruiyi et al, 2015). Electrodes, modified with metal nanoparticles, metal alloys and metal oxides, have been examined as enzyme-free electrochemical glucose sensors (Cooray et al, 2015;Li et al, 2015). However, most of these sensors have displayed the drawbacks of the high cost of rare metal precursors and low sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Molecular imprinting method for fabricating novel glucose sensor: Polyvinyl acetate electrode reinforced by MnO2/CuO loaded on graphene oxide nanoparticles

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Molecular imprinting method for fabricating novel glucose sensor: Polyvinyl acetate electrode reinforced by MnO2/CuO loaded on graphene oxide nanoparticles

et al. 2016

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“…The PMGFs show a linear response over 200 × 10 −9 to 1 × 10 −6 m with a correlation coefficient 0.988 and the limit of detection (LoD) was estimated to be 450 × 10 −9 m (Figure h), which is almost ten times higher than NMGFs (4.12 × 10 −6 m ) . Such a detection at a nanomolar level has never been reported, although different Au structures such as Au nanoparticles (500 × 10 −6 m ), inverse‐opal Au film (3.2 × 10 −6 m ), polymer stabilized Au (61 × 10 −6 m ), and nanowires (50 × 10 −6 m ) have also been tested . We believe that this higher electrocatalytic activity is not limited to glucose and could be employed to design ultrasensitive detection of other clinically relevant disease‐specific molecules.…”

Section: Resultsmentioning

confidence: 92%

Designed Patterning of Mesoporous Metal Films Based on Electrochemical Micelle Assembly Combined with Lithographical Techniques

Lim

Kim

Kani

et al. 2019

Small

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Mesoporous noble metals and their patterning techniques for obtaining unique patterned structures are highly attractive for electrocatalysis, photocatalysis, and optoelectronics device applications owing to their expedient properties such as high level of exposed active locations, cascade electrocatalytic sites, and large surface area. However, patterning techniques for mesoporous substrates are still limited to metal oxide and silica films, although there is growing demand for developing techniques related to patterning mesoporous metals. In this study, the first demonstration of mesoporous metal films on patterned gold (Au) substrates, prefabricated using photolithographic techniques, is reported. First, different growth rates of mesoporous Au metal films on patterned Au substrates are demonstrated by varying deposition times and voltages. In addition, mesoporous Au films are also fabricated on various patterns of Au substrates including stripe and mesh lines. An alternative fabrication method using a photoresist insulating mask also yields growth of mesoporous Au within the patterning. Moreover, patterned mesoporous films of palladium (Pd) and palladium–copper alloy (PdCu) are demonstrated on the same types of substrates to show versatility of this method. Patterned mesoporous Au films (PMGFs) show higher electrochemically active surface area (ECSA) and higher sensitivity toward glucose oxidation than nonpatterned mesoporous Au films (NMGF).

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“…In glucose sensing, ascorbic acid (AA) and uric acid (UA) are the main species interfering with the determination of glucose in biological samples. Trace amounts of metabolites of drugs also may be problematic . Therefore, an interference study was undertaken in the presence of physiological amounts of either AA or UA in aqueous 0.1 M PBS pH 7 solution using the Fc‐PEI‐AuNPs/GOx modified GCE.…”

Section: Resultsmentioning

confidence: 99%

“…Enzyme electrodes, which utilize immobilized oxidoreductase as the catalysts for electrochemical oxidation/reduction of a substrate, are very important for sensing and energy applications . In the field of sensing, electrochemical glucose sensors, which utilize immobilized glucose oxidase/dehydrogenase as catalysts for electrochemical oxidation of glucose, provide a facile, cost‐effective, precise and simple method for the determination of glucose for diabetic patients to prevent the occurrence of blindness, kidney failure and heart disease which are more pronounced in humans having abnormal blood glucose concentrations outside of the region of 4.4 mM–6.6 mM . Reliable and commercially successful electrochemical biosensors are now available .…”

Section: Introductionmentioning

confidence: 99%

Efficient Enzymatic Oxidation of Glucose Mediated by Ferrocene Covalently Attached to Polyethylenimine Stabilized Gold Nanoparticles

Cooray

Sandanayake

et al. 2016

Electroanalysis

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Bioanodes for fuel cell applications require highly efficient oxidation reactions to achieve a sufficiently large current density. In this study, gold nanoparticles have been synthesized using branched polyethylenimine (bPEI), a well‐known polymer that forms a hydrogel in water, as the stabilizer. Primary amine groups available in bPEI provide active sites for further conjugation with ferrocene propionic acid via the 1‐Ethyl‐3‐(3‐dimethylaminopropyl)carbodiimide coupling reaction, with the enzyme glucose oxidase, using glutaraldehyde as linkers. This composite material was then used for the fabrication of glucose oxidase electrodes by drop casting of aqueous solutions onto glassy carbon electrodes. The three‐dimensional structure offered by the new hydrogel facilitates communication between the enzyme and the electrode through the redox mediator ferrocene. This allows the glucose oxidase electrode to exhibit excellent activity towards electrocatalytic oxidation of glucose in phosphate buffer solutions at pH 7 with a maximum current density of approximately 800 μA cm−2, one of the highest values reported so far for redox hydrogel based glucose oxidase electrodes. Over a wide glucose concentration range, the enzyme response follows that predicted by the Michaelis‐Menten equation with a Michaelis constant of 8.4 mM. In the sensing context, this electrode also exhibits a wide linear dynamic glucose concentration range of 0.5–10 mM with a limit of detection of 0.04 mM.

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One pot synthesis of poly(5-hydroxyl-1,4-naphthoquinone) stabilized gold nanoparticles using the monomer as the reducing agent for nonenzymatic electrochemical detection of glucose

Cited by 15 publications

References 42 publications

Molecular imprinting method for fabricating novel glucose sensor: Polyvinyl acetate electrode reinforced by MnO2/CuO loaded on graphene oxide nanoparticles

Molecular imprinting method for fabricating novel glucose sensor: Polyvinyl acetate electrode reinforced by MnO2/CuO loaded on graphene oxide nanoparticles

Designed Patterning of Mesoporous Metal Films Based on Electrochemical Micelle Assembly Combined with Lithographical Techniques

Efficient Enzymatic Oxidation of Glucose Mediated by Ferrocene Covalently Attached to Polyethylenimine Stabilized Gold Nanoparticles

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