Electrospun Co3O4 nanofibers for sensitive and selective glucose detection

Ding, Yu; Wang, Ying; Su, Liang; Bellagamba, Michael; Zhang, Heng; Lei, Yu

doi:10.1016/j.bios.2010.07.050

Cited by 646 publications

(363 citation statements)

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“…Cobalt oxide especially has the potential to play a key role in the fields of catalysis, sensors, battery technology, and nanomagnetic applications. [1][2][3][4][5][6] The downsizing of oxide materials to nanometer dimensions may lead to properties strongly deviating compared to those of bulk. 7-10 Ultra-thin oxide films supported on a metal substrate additionally suffer from the inhomogeneous chemical binding at the interface, arising from the different lateral periodicities of film and substrate.…”

Section: Introductionmentioning

confidence: 99%

Incommensurate Moiré overlayer with strong local binding: CoO(111) bilayer on Ir(100)

et al. 2012

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Incommensurate relaxed overlayer Moiré structures are often interpreted as systems with weak lateral variations of the binding potential and thus no structural modulations in the overlayer material. We discuss here the example of a CoO(111) bilayer on Ir(100), which is a relaxed overlayer with strong structural response to the lateral modulation of interface properties but nevertheless is incommensurate. By means of DFT calculations we quantitatively reproduce all the structural parameters of the CoO(111) bilayer on Ir(100) as proposed by a recent LEED analysis [C. Ebensperger et al., Phys. Rev. B 81, 235405 (2010)]. The calculations predict energetic degeneracies with respect to registry shifts of the CoO(111) film along [011]. Large-scale, low-temperature STM topographies reveal that the true structure of the film is incommensurate in this direction, exhibiting a onedimensional Moiré pattern with a period of about 9.4 aIr. From DFT calculations for limiting (periodic) models, we can sample the potential landscape of the cobalt and oxygen atoms in the Moiré structure across the Ir(100) unit cell. We find that despite the non-commensurability of the film, the binding to the substrate is site specific with strong attraction and repulsion points for both cobalt and oxygen atoms, leading to severe local distortions in the film. The lateral modulation of the structural elements within the oxide film can be understood as a combination of the lateral variation in the Co-Ir binding potential and additional O-Ir binding.

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Section: Introductionmentioning

confidence: 99%

Incommensurate Moiré overlayer with strong local binding: CoO(111) bilayer on Ir(100)

et al. 2012

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“…However, the facet-dependent property of Co 3 O 4 nanocrystals has never been explicitly elucidated for enzymeless biosensing, despite of the many studies on the crystal morphology for amperometric sensing activity [7][8][9] . For this reason, we intend to investigate the facet-dependent property on Co 3 O 4 nanocrystals for the detection of glucose biomolecules.…”

Section: Down This Route It Is Clear That the Strategy Of Crystal Famentioning

confidence: 99%

“…Fig. 3(d) [7] . Although the glucose sensitivity of TNO in the present work is not comparable to the state-of-the-art Co 3 O 4 materials [17] , it exhibits a decent sensitivity close to that of structurally engineered Co 3 O 4 nanocrystals without structural/chemical modification.…”

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confidence: 99%

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Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing

Leng

Gentle

et al. 2016

Journal of Materials Science & Technology

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In this work, we report enhanced electroactivity of Co 3 O 4 nanocrystals (nanocubes, NCs and truncated nano-octahedra, TNO) on the exposed {111} facets as compared to the {001} facets in relation to the surface density and the activity of the octahedral Co III species. Transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed to characterize the crystal facets and materials properties. The enhanced electroactivity of {111} crystal facets was evaluated by cyclic voltammetry and amperometric titration. Our results indicate that the {111} facets in TNO has a better electroactivity for enzymeless glucose sensing with a decent glucose sensitivity of 32.54 μA (mmol/L) -1 cm -2 .

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“…Research has been reported in areas as diverse as scaffolds for tissue regeneration/regenerative medicine (Martins et al, 2007), drug delivery systems (Hadjiargyrou & Chiu, 2008), wound dressing materials (Khil et al, 2003;Kang et al, 2010;Chen & Chian, 2010;Cai et al, 2010), biocatalysis (Nair et al, 2007), cardiovascular grafts (Sell et al, 2009), prevention of post-surgical adhesions (Zong et al, 2004;Bölgen et al, 2007), filtration (Kattamuri et al, 2005), energy and environmental applications (Thavasi et al, 2008), biosensors (Manesh et al, 2007;Kowalczyk et al, 2008;Ding et al, 2010), and protective clothing (Gibson et al, 1998 ;Seungsin & Obendorf, 2006). In fact, there are over 1,650 reports indexed in PubMed for a keyword search of "electrospun or electrospinning".…”

Section: Introductionmentioning

confidence: 99%

Incorporation of DNA into Electrospun Nanofibrous Scaffolds: Fundamental Characterization Studies and Gene Delivery

Hadjiargyrou¹

2011

Nanofibers - Production, Properties and Functional Applications

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Electrospun Co3O4 nanofibers for sensitive and selective glucose detection

Cited by 646 publications

References 46 publications

Incommensurate Moiré overlayer with strong local binding: CoO(111) bilayer on Ir(100)

Incommensurate Moiré overlayer with strong local binding: CoO(111) bilayer on Ir(100)

Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing

Incorporation of DNA into Electrospun Nanofibrous Scaffolds: Fundamental Characterization Studies and Gene Delivery

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