Tabowei Churchill Onuosa | Teesside University (original) (raw)
Papers by Tabowei Churchill Onuosa
Environmental …, Jan 1, 2011
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Nature …, Jan 1, 2011
When charge carriers are spatially confined to one dimension, conventional Fermi-liquid theory br... more When charge carriers are spatially confined to one dimension, conventional Fermi-liquid theory breaks down. In such Tomonaga–Luttinger liquids, quasiparticles are replaced by distinct collective excitations of spin and charge that propagate independently with different velocities. Although evidence for spin–charge separation exists, no bulk low-energy probe has yet been able to distinguish successfully between Tomonaga–Luttinger and Fermi-liquid physics. Here we show experimentally that the ratio of the thermal and electrical Hall conductivities in the metallic phase of quasi-one-dimensional Li0.9Mo6O17 diverges with decreasing temperature, reaching a value five orders of magnitude larger than that found in conventional metals. Both the temperature dependence and magnitude of this ratio are consistent with Tomonaga–Luttinger liquid theory. Such a dramatic manifestation of spin–charge separation in a bulk three-dimensional solid offers a unique opportunity to explore how the fermionic quasiparticle picture recovers, and over what time scale, when coupling to a second or third dimension is restored.
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Nature …, Jan 1, 2011
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Nature communications, Jan 1, 2010
Engineering compact imaging probes with highly integrated modalities is a key focus in bionanotec... more Engineering compact imaging probes with highly integrated modalities is a key focus in bionanotechnology and will have profound impact on molecular diagnostics, imaging and therapeutics. However, combining multiple components on a nanometre scale to create new imaging modalities unavailable from individual components has proven to be challenging. In this paper, we demonstrate iron oxide and gold-coupled core-shell nanoparticles (NPs) with well-defined structural characteristics (for example, size, shell thickness and core-shell separation) and physical properties (for example, electronic, magnetic, optical, thermal and acoustic). The resulting multifunctional nanoprobes not only offer contrast for electron microscopy, magnetic resonance imaging and scattering-based imaging but, more importantly, enable a new imaging mode, magnetomotive photoacoustic imaging, with remarkable contrast enhancement compared with photoacoustic images using conventional NP contrast agents.
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Chemical Engineering …, Jan 1, 2011
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Bioresource technology, Jan 1, 2011
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Nature communications, Jan 1, 2010
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Quaternary …, Jan 1, 2009
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Nature …, Jan 1, 2010
Synthetic nanomotors, which convert chemical energy into autonomous motion, hold considerable pro... more Synthetic nanomotors, which convert chemical energy into autonomous motion, hold considerable promise for diverse applications. In this paper, we show the use of synthetic nanomotors for detecting DNA and bacterial ribosomal RNA in a fast, simple and sensitive manner. The new motion-driven DNA-sensing concept relies on measuring changes in the speed of unmodified catalytic nanomotors induced by the dissolution of silver nanoparticle tags captured in a sandwich DNA hybridization assay. The concentration-dependent distance signals are visualized using optical microscopy, particularly through straight-line traces by magnetically aligned 'racing' nanomotors. This nanomotor biodetection strategy could be extended to monitor a wide range of biomolecular interactions using different motion transduction schemes, thus providing a versatile and powerful tool for detecting biological targets.
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Water Environment …, Jan 1, 2010
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Microgravity Science …, Jan 1, 2011
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genomicscience.energy.gov
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Quaternary …, Jan 1, 2009
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Environmental Chemistry, Jan 1, 2010
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Journal of Agricultural …, Jan 1, 2011
There is increasing concern about modifications to pesticide persistence in soil from the applica... more There is increasing concern about modifications to pesticide persistence in soil from the application of organic wastes as fertilizers. This study was conducted to discriminate the multiple effects of biogas residues (BR) amendment, including soil nutrients, soil microbial activity and biodiversity, and adsorption and degradation of chloroacetanilide herbicides (acetochlor, metolachlor, and butachlor). Addition of BR to soil increased the release of organic materials (i.e., dissolved organic carbon, dissolved organic nitrogen, and active phosphorus). It not only stimulated soil microorganisms and caused changes to microorganism diversity but also increased herbicide adsorption. Such multiple effects led to selective decontamination of chloroacetanilide herbicides, depending on herbicide structures and BR amendment levels. Stereoselectivity in degradation of acetochlor and metolachlor with biphasic character was magnified by BR amendment, which was well explained by integrating the impacts of BR amendment. Interestingly, BR amendment induced significant accumulation of herbicidally active aS,CS-metolachlor, facilitating the utilization of herbicidal activity.
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UK Biochar …, Jan 1, 2010
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Environmental …, Jan 1, 2011
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Global Change …, Jan 1, 2012
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A critical scientific …, Jan 1, 2010
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Environmental …, Jan 1, 2011
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Nature …, Jan 1, 2011
When charge carriers are spatially confined to one dimension, conventional Fermi-liquid theory br... more When charge carriers are spatially confined to one dimension, conventional Fermi-liquid theory breaks down. In such Tomonaga–Luttinger liquids, quasiparticles are replaced by distinct collective excitations of spin and charge that propagate independently with different velocities. Although evidence for spin–charge separation exists, no bulk low-energy probe has yet been able to distinguish successfully between Tomonaga–Luttinger and Fermi-liquid physics. Here we show experimentally that the ratio of the thermal and electrical Hall conductivities in the metallic phase of quasi-one-dimensional Li0.9Mo6O17 diverges with decreasing temperature, reaching a value five orders of magnitude larger than that found in conventional metals. Both the temperature dependence and magnitude of this ratio are consistent with Tomonaga–Luttinger liquid theory. Such a dramatic manifestation of spin–charge separation in a bulk three-dimensional solid offers a unique opportunity to explore how the fermionic quasiparticle picture recovers, and over what time scale, when coupling to a second or third dimension is restored.
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Nature …, Jan 1, 2011
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Nature communications, Jan 1, 2010
Engineering compact imaging probes with highly integrated modalities is a key focus in bionanotec... more Engineering compact imaging probes with highly integrated modalities is a key focus in bionanotechnology and will have profound impact on molecular diagnostics, imaging and therapeutics. However, combining multiple components on a nanometre scale to create new imaging modalities unavailable from individual components has proven to be challenging. In this paper, we demonstrate iron oxide and gold-coupled core-shell nanoparticles (NPs) with well-defined structural characteristics (for example, size, shell thickness and core-shell separation) and physical properties (for example, electronic, magnetic, optical, thermal and acoustic). The resulting multifunctional nanoprobes not only offer contrast for electron microscopy, magnetic resonance imaging and scattering-based imaging but, more importantly, enable a new imaging mode, magnetomotive photoacoustic imaging, with remarkable contrast enhancement compared with photoacoustic images using conventional NP contrast agents.
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Chemical Engineering …, Jan 1, 2011
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Bioresource technology, Jan 1, 2011
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Nature communications, Jan 1, 2010
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Quaternary …, Jan 1, 2009
Bookmarks Related papers MentionsView impact
Nature …, Jan 1, 2010
Synthetic nanomotors, which convert chemical energy into autonomous motion, hold considerable pro... more Synthetic nanomotors, which convert chemical energy into autonomous motion, hold considerable promise for diverse applications. In this paper, we show the use of synthetic nanomotors for detecting DNA and bacterial ribosomal RNA in a fast, simple and sensitive manner. The new motion-driven DNA-sensing concept relies on measuring changes in the speed of unmodified catalytic nanomotors induced by the dissolution of silver nanoparticle tags captured in a sandwich DNA hybridization assay. The concentration-dependent distance signals are visualized using optical microscopy, particularly through straight-line traces by magnetically aligned 'racing' nanomotors. This nanomotor biodetection strategy could be extended to monitor a wide range of biomolecular interactions using different motion transduction schemes, thus providing a versatile and powerful tool for detecting biological targets.
Bookmarks Related papers MentionsView impact
Water Environment …, Jan 1, 2010
Bookmarks Related papers MentionsView impact
Microgravity Science …, Jan 1, 2011
Bookmarks Related papers MentionsView impact
genomicscience.energy.gov
Bookmarks Related papers MentionsView impact
Quaternary …, Jan 1, 2009
Bookmarks Related papers MentionsView impact
Environmental Chemistry, Jan 1, 2010
Bookmarks Related papers MentionsView impact
Journal of Agricultural …, Jan 1, 2011
There is increasing concern about modifications to pesticide persistence in soil from the applica... more There is increasing concern about modifications to pesticide persistence in soil from the application of organic wastes as fertilizers. This study was conducted to discriminate the multiple effects of biogas residues (BR) amendment, including soil nutrients, soil microbial activity and biodiversity, and adsorption and degradation of chloroacetanilide herbicides (acetochlor, metolachlor, and butachlor). Addition of BR to soil increased the release of organic materials (i.e., dissolved organic carbon, dissolved organic nitrogen, and active phosphorus). It not only stimulated soil microorganisms and caused changes to microorganism diversity but also increased herbicide adsorption. Such multiple effects led to selective decontamination of chloroacetanilide herbicides, depending on herbicide structures and BR amendment levels. Stereoselectivity in degradation of acetochlor and metolachlor with biphasic character was magnified by BR amendment, which was well explained by integrating the impacts of BR amendment. Interestingly, BR amendment induced significant accumulation of herbicidally active aS,CS-metolachlor, facilitating the utilization of herbicidal activity.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
UK Biochar …, Jan 1, 2010
Bookmarks Related papers MentionsView impact
Environmental …, Jan 1, 2011
Bookmarks Related papers MentionsView impact
Global Change …, Jan 1, 2012
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A critical scientific …, Jan 1, 2010
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