Manganese(II) phosphate nanoflowers as electrochemical biosensors for the high-sensitivity detection of ractopamine

Zhang, Zhihong; Zhang, Yuanchang; Song, Ruirui; Wang, Minghua; Yan, Fufeng; He, Linghao; Feng, Xinliang; Fang, Shaoming; Zhao, Jihong; Zhang, Hongzhong

doi:10.1016/j.snb.2015.01.106

Cited by 99 publications

(43 citation statements)

References 33 publications

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“…Besides, using different metal ions as inorganic part, several protein-inorganic hybrid nanoflowers were also synthesized. For example, BSA/ZnO [51], BSA/Zn3(PO4) [52], BSA/Mn3(PO4)2 [53], lipase/ Zn3(PO4)2 [54], lipase/Ca3(PO4)2 [55], phenylphosphinic acid/Al(NO3)3.9H2O [56], BSA/AgNO3 [57], protein/Mn3(PO4)2 [58].…”

Section: Organic-inorganic Hybrid Nanoflowersmentioning

confidence: 99%

A new generation approach in enzyme immobilization: Organic-inorganic hybrid nanoflowers with enhanced catalytic activity and stability

Altınkaynak

Tavlasoglu

Özdemir

et al. 2016

Enzyme and Microbial Technology

206

108

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Section: Organic-inorganic Hybrid Nanoflowersmentioning

confidence: 99%

A new generation approach in enzyme immobilization: Organic-inorganic hybrid nanoflowers with enhanced catalytic activity and stability

Altınkaynak

Tavlasoglu

Özdemir

et al. 2016

Enzyme and Microbial Technology

206

108

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“…These highly structured materials have primarily been used for the immobilization of enzymes that ultimately achieve superior enzymatic performances. [8][9][10][11] Similar phosphate-based materials have also been synthesized, however, in the absence of organic motifs, that is without macromolecules. 12,13 Materials that display accessible surface areas, 14 high index facets, 15 and sharp edges, 16 and are composed of transition metals, [17][18][19] are potentially useful in the field of electrocatalysis for sensing biochemical analytes.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

Tomanin

Cherepanov

Besford

et al. 2018

ACS Appl. Mater. Interfaces

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Nanostructured materials have great potential as platforms for analytical assays and catalytic reactions. Herein, we report the synthesis of electrocatalytically active cobalt phosphate nanostructures (CPNs) using a simple, low-cost, and scalable preparation method. The electrocatalytic properties of the CPNs toward the electrooxidation of glucose (Glu) were studied by cyclic voltammetry and chronoamperometry in relevant biological electrolytes, such as phosphate-buffered saline (PBS), at physiological pH (7.4). Using the CPNs, Glu detection could be achieved over a wide range of biologically relevant concentrations, from 1 to 30 mM Glu in PBS, with a sensitivity of 7.90 nA/mM cm 2 and a limit of detection of 0.3 mM, thus fulfilling the necessary requirements for human blood Glu detection. In addition, the CPNs showed a high structural and functional stability over time at physiological pH. The CPN-coated electrodes could also be used for Glu detection in the presence of interfering agents (e.g., ascorbic acid and dopamine) and in human serum. Density functional theory calculations were performed to evaluate the interaction of Glu with different faceted cobalt phosphate surfaces; the results revealed that specific surface presentations of undercoordinated cobalt led to the strongest interaction with Glu, suggesting that enhanced detection of Glu by the CPNs can be achieved by lowering the surface coordination of cobalt.Our results highlight the potential use of phosphate-based nanostructures as catalysts for electrochemical sensing of biochemical analytes.Potassium chloride (KCl, CAS no. 7440-09-7) was purchased from Chem-Supply. All the chemicals were used as received. High purity (Milli-Q) water with a resistivity of 18.2 MΩ cm was obtained from an inline Millipore RiOs/Origin water purification system.Instrumentation. X-ray photoelectron spectroscopy (XPS) spectra were acquired using an Axis Ultra X-ray photoelectron spectrometer (Kratos Analytical, UK), equipped with a 165 mm concentric hemispherical electron energy analyzer and a monochromated Al Kα incident Xray source (1486.6 eV). Survey (wide) scans were recorded in the binding energy range of 0-1200 eV, with 1.0 eV steps, a dwell time of 100 ms, and an analyzer pass energy of 160 eV.Multiplex (narrow) high-resolution spectra were recorded with a pass energy of 20 eV, with 0.05 eV steps, and a dwell time of 250 ms, resulting in an energy resolution (ΔE/E) of ~300 meV. The base pressure in the analysis chamber during data collection was 1-2 × 10 −9 mbar, and these data were processed using the software CasaXPS. All binding energies were calibrated using the C 1s level of adventitious carbon at 285.0 eV. Fourier transform infrared (FTIR) spectra were obtained on a Tensor II (Bruker) attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectrometer and analyzed using the software OPUS 7.8. The number of scans was 64. A minimum resolution of 4 cm −1 and the absorbance/transmittance mode were used. Scanning electron microscopy (SEM) images were o...

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“…These techniques basically require a long extraction time, large sample volume, long assay time and considerable organic solvent consumption. Some immunoassays, such as ELISA, strip‐based, electrochemistry‐based and surface plasmon resonance (SPR)‐based immnosensors can provide high specificity and sensitivity with short time needed . However, ELISA and strip‐based immunosenors takes a lot of time for incubation and requires multiple washing steps.…”

Section: Recovery Rates Of Different Concentrations Of Rct In Negativmentioning

confidence: 99%

A competitive luminol chemiluminescence immunosensor based on a microfluidic chip for the determination of ractopamine

et al. 2016

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Herein, a competitive luminol chemiluminescence immunosensor based on a microfluidic chip was developed to detect ractopamine (RCT) both in phosphate buffer and swine urine samples. The immunosensor can provide a liner range of 0.5-40 ng/mL and a high sensitivity with a limit of detection of 0.97 ng/mL for RCT detection in swine urine. Good rates of recovery in negative swine urine samples were achieved over the RCT concentration ranging from 0.5 to 40 ng/mL. The proposed method offered a promising analytical scheme for the on-site determination of RCT.

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Manganese(II) phosphate nanoflowers as electrochemical biosensors for the high-sensitivity detection of ractopamine

Cited by 99 publications

References 33 publications

A new generation approach in enzyme immobilization: Organic-inorganic hybrid nanoflowers with enhanced catalytic activity and stability

A new generation approach in enzyme immobilization: Organic-inorganic hybrid nanoflowers with enhanced catalytic activity and stability

Cobalt Phosphate Nanostructures for Non-Enzymatic Glucose Sensing at Physiological pH

A competitive luminol chemiluminescence immunosensor based on a microfluidic chip for the determination of ractopamine

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