Samuel Chigome

Rhodes University, Chemistry, Post-Doc

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A review of opportunities for electrospun nanofibers in analytical chemistry

Analytica Chimica Acta, Jan 1, 2011

Challenges associated with analyte and matrix complexities and the ever increasing pressure from ... more Challenges associated with analyte and matrix complexities and the ever increasing pressure from all sectors of industry for alternative analytical devices, have necessitated the development and application of new materials in analytical chemistry. To date, nanomaterials have emerged as having excellent properties for analytical chemistry applications mainly due to their large surface area to volume ratio and the availability of a wide variety of chemical and morphological modification methods. Of the available nanofibrous material fabrication methods, electrospinning has emerged as the most versatile. It is the aim of this contribution to highlight some of the recent developments that harness the great potential shown by electrospun nanofibers for application in analytical chemistry. The review discusses the use of electrospun nanofibers as a platform for low resolution separation or as a chromatographic sorbent bed for high resolution separation. It concludes by discussing the applications of electrospun nanofibers in detection systems with a specific focus on the development of simple electrospun nanofiber based colorimetric probes.► Electrospun nanofiber based separation systems. ► Electrospun nanofiber based detection systems. ► Electrospun nanofiber based non invasive colorimetric analytical devices.

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Preparation and characterization of electrospun poly(2,5-dicyclohexylphenylene-1,4-ethynylene) (C 24 H 30 ) n /poly(ethylene oxide) (PEO) hybrid nanofibers

Journal of Materials Science, Jan 1, 2010

We report the preparation of poly(2,5-dicyclohexylphenylene-1,4-ethynylene) (PDE)/poly(ethylene o... more We report the preparation of poly(2,5-dicyclohexylphenylene-1,4-ethynylene) (PDE)/poly(ethylene oxide) (PEO) hybrid nanofibers by electrospinning technique. The hybrid nanofibers were characterized by a host of characterization techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, atomic force microscopy, optical and scanning electron microscopy. The results showed a successful preparation of PDE/PEO composite nanofibers. The diameter of the hybrid nanofibers ranges between 500 and 1000 nm. The results showed that this kind of hybrid nanofibers could be a possible candidate in color display devices.

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Semimicro solid phase extraction with electrospun polystyrene fiber disks

Analytical Methods, Jan 1, 2010

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Synthesis and characterization of cobalt chloride/poly(ethylene oxide) electrospun hybrid nanofibers

Journal of Sol-gel Science and Technology, Jan 1, 2010

Cobalt chloride (CoCl2)/poly(ethylene oxide) (PEO) hybrid nanofibers with diameters ranging from ... more Cobalt chloride (CoCl2)/poly(ethylene oxide) (PEO) hybrid nanofibers with diameters ranging from 500 to 700 nm were successfully synthesized by a simple and versatile approach of electrospinning. The CoCl2/PEO hybrid nanofibers were studied by different techniques such as Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Fourier Transform Infrared (FTIR) and Thermogravimetric Analysis (TGA). One dimensional (1-D) surface roughness average (Ra1-D) along a typical nanofiber was analyzed to be 57 nm. The chemical interactions between the CoCl2 and PEO molecules showed that polar environment provided by CoCl2 for the PEO molecules aided the modification of CoCl2 molecule configuration.

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Electric-magnetic field-induced aligned electrospun poly (ethylene oxide) (PEO) nanofibers

Journal of Materials Science, Jan 1, 2010

In this work, we report our attempt on the production of well-aligned nanofibers of poly (ethylen... more In this work, we report our attempt on the production of well-aligned nanofibers of poly (ethylene oxide) (PEO) by the introduction of magnetic field in the electric field by placing a cylindrical magnet within the electric field. Well-aligned nanofibers were obtained on top of the magnet. No particular structure could be associated with the other sides of the magnet. The aligned nanofibers were characterized by a host of characterization techniques such as optical and scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The diameter of the PEO nanofibers ranged between 500 and 1000 nm.

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Synthesis and Substrate-Aided Alignment of Porphyrinated Poly(ethylene oxide) (PEO) Electrospun Nanofibers

International Journal of Polymeric Materials, Jan 1, 2010

... Adurafimihan A. Abiona,1,4 Samuel Chigome,3,4 John A. Ajao,1,4 Adeniyi Y. Fasasi,1,4 Nelson T... more ... Adurafimihan A. Abiona,1,4 Samuel Chigome,3,4 John A. Ajao,1,4 Adeniyi Y. Fasasi,1,4 Nelson Torto,3 ... This work was financially supported by the following organizations: African Laser Centre (ALC), Nanoscience African Network (NANOAFNET), Abdul Salam Inter-national ...

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