Templating synthesis of hollow CuO polyhedron and its application for nonenzymatic glucose detection

Kong, Chuncai; Tang, Linli; Zhang, Xiaozhe; Sun, Shaodong; Yang, Shengchun; Song, Xiaoping; Yang, Zhimao

doi:10.1039/c4ta00703d

Cited by 94 publications

(48 citation statements)

References 48 publications

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“…In addition, the strong shake-up peaks confirmed the Cu(II) oxidation state and excluded the possible existence of the Cu 2 O phase. 42 Fig . 3 shows the FESEM micrographs of Ni@CuO composites with different magnifications after hydrothermal treatment at 150 1C for 15 h. It can be observed from Fig.…”

Section: Characterization Of Ni@cuo Heterostructuresmentioning

confidence: 96%

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Zhao

Shao

Fan

et al. 2015

Phys. Chem. Chem. Phys.

110

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A novel hierarchical heterostructure of Ni microspheres-CuO nano-rices was fabricated using a simple two-step process. The CuO rices were densely deposited on the surfaces of Ni microspheres. The phase purity, morphology, and structure of composite heterostructures are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Different structured Ni-CuO composite heterostructures are also investigated by adjusting the volume ratio of the reactants. The core-shell rice-like CuO-coated Ni exhibits better antioxidation capability than pure Ni due to the presence of the barrier effect of the CuO shell, which is revealed by the thermogravimetric analysis (TGA). In comparison with pristine Ni microspheres and CuO nanoflakes, the Ni-CuO composites exhibit excellent microwave absorption properties. Moreover, the amount of CuO plays a vital role in the microwave attenuation of Ni-CuO composites. The Ni-CuO heterostructures prepared at 0.017 M Cu(2+) exhibit the best electromagnetic wave absorption capabilities. A minimum reflection loss reaches -62.2 dB (>99.9999% microwave absorption) at 13.8 GHz with the thickness of only 1.7 mm. The effective absorption (below -10 dB) bandwidth can be tuned between 6.4 GHz and 18.0 GHz by tuning the absorber thickness of 1.3-3.0 mm. Thus, the Ni-CuO composite possesses a fascinating microwave absorption performance as a novel absorbing material with strong absorption, wide-band gap and thin thickness.

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Section: Characterization Of Ni@cuo Heterostructuresmentioning

confidence: 96%

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Zhao

Shao

Fan

et al. 2015

Phys. Chem. Chem. Phys.

110

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“… 1,3,11,14,24,[35][37] Figure S8presents the current-time curve of the Cu foam-supported Cu 2 O electrode towards 10 nM glucose, displaying an obvious step-like increase of current due to the glucose addition.Figure 6e displays the typical amperometric detection of the Cu foam-supported Cu 2 O electrode at 0.55 V vs. Ag/AgCl owing to the stepwise addition of glucose from 0.1 µM to 1 mM.…”

mentioning

confidence: 98%

Three-Dimensional Cu Foam-Supported Single Crystalline Mesoporous Cu₂O Nanothorn Arrays for Ultra-Highly Sensitive and Efficient Nonenzymatic Detection of Glucose

Dong

Zhong

Kou

et al. 2015

ACS Appl. Mater. Interfaces

131

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Highly sensitive and efficient biosensors play a crucial role in clinical, environmental, industrial, and agricultural applications, and tremendous efforts have been dedicated to advanced electrode materials with superior electrochemical activities and low cost. Here, we report a three-dimensional binder-free Cu foam-supported Cu2O nanothorn array electrode developed via facile electrochemistry. The nanothorns growing in situ along the specific direction of <011> have single crystalline features and a mesoporous surface. When being used as a potential biosensor for nonenzyme glucose detection, the hybrid electrode exhibits multistage linear detection ranges with ultrahigh sensitivities (maximum of 97.9 mA mM(-1) cm(-2)) and an ultralow detection limit of 5 nM. Furthermore, the electrode presents outstanding selectivity and stability toward glucose detection. The distinguished performances endow this novel electrode with powerful reliability for analyzing human serum samples. These unprecedented sensing characteristics could be ascribed to the synergistic action of superior electrochemical catalytic activity of nanothorn arrays with dramatically enhanced surface area and intimate contact between the active material (Cu2O) and current collector (Cu foam), concurrently supplying good conductivity for electron/ion transport during glucose biosensing. Significantly, our findings could guide the fabrication of new metal oxide nanostructures with well-organized morphologies and unique properties as well as low materials cost.

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“…Yang et al developed by a templating approach a hollow CuO polyhedron-modified sensor for the nonenzymatic glucose detection [111]. Morphology and structure of the composite were characterized by FESEM, TEM, XRD, Raman and XPS techniques.…”

Section: Botelho Do Rego Et Al Performed a Cv/xps Investigation Of Tmentioning

confidence: 99%

X-Ray Photoelectron Spectroscopic Characterization of Chemically Modified Electrodes Used as Chemical Sensors and Biosensors: A Review

2015

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Abstract:The characterization of chemically modified sensors and biosensors is commonly performed by cyclic voltammetry and electron microscopies, which allow verifying electrode mechanisms and surface morphologies. Among other techniques, X-ray photoelectron spectroscopy (XPS) plays a unique role in giving access to qualitative, quantitative/semi-quantitative and speciation information concerning the sensor surface. Nevertheless, XPS remains rather underused in this field. The aim of this paper is to review selected articles which evidence the useful performances of XPS in characterizing the top surface layers of chemically modified sensors and biosensors. A concise introduction to X-ray Photoelectron Spectroscopy gives to the reader the essential background. The application of XPS for characterizing sensors suitable for food and environmental analysis is highlighted.

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Templating synthesis of hollow CuO polyhedron and its application for nonenzymatic glucose detection

Cited by 94 publications

References 48 publications

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Three-Dimensional Cu Foam-Supported Single Crystalline Mesoporous Cu₂O Nanothorn Arrays for Ultra-Highly Sensitive and Efficient Nonenzymatic Detection of Glucose

X-Ray Photoelectron Spectroscopic Characterization of Chemically Modified Electrodes Used as Chemical Sensors and Biosensors: A Review

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Templating synthesis of hollow CuO polyhedron and its application for nonenzymatic glucose detection

Cited by 94 publications

References 48 publications

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Facile synthesis and enhanced microwave absorption properties of novel hierarchical heterostructures based on a Ni microsphere–CuO nano-rice core–shell composite

Three-Dimensional Cu Foam-Supported Single Crystalline Mesoporous Cu2O Nanothorn Arrays for Ultra-Highly Sensitive and Efficient Nonenzymatic Detection of Glucose

X-Ray Photoelectron Spectroscopic Characterization of Chemically Modified Electrodes Used as Chemical Sensors and Biosensors: A Review

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Three-Dimensional Cu Foam-Supported Single Crystalline Mesoporous Cu₂O Nanothorn Arrays for Ultra-Highly Sensitive and Efficient Nonenzymatic Detection of Glucose