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You searched for +publisher:"University of Manchester" +contributor:("ANDERSON, MICHAEL MW"). Showing records 1 – 2 of 2 total matches.

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University of Manchester

1. Jalil, Mohammad Noor. The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications.

Degree: 2011, University of Manchester

In this study, two kinds of mesoporous materials were prepared. The first was a silica mesostructure grown within a porous aluminium oxide membrane columnar material (hybrid-AOM). This was prepared using a sol-gel technique with Pluronic P123 triblock copolymer as the structure-directing agent and tetraethyl orthosilicate as the inorganic source. The hybrid-AOM had a similar pore size distribution to that of as-prepared SBA-15 but showed an amorphous character, as demonstrated by nitrogen adsorption and SAXRD. The second type of material was a continuous mesoporous silica thin film, prepared by the dip-coating technique using Pluronic F127 triblock copolymer as the structure-directing agent and the same silica source as hybrid-AOM. The film, which was self-assembled on substrates such as indium tin oxide (ITO), glass and gold, exhibited long-range ordered mesostructures after several treatments and aging. Grazing incidence small-angle X-ray scattering method (GISAXS) showed that the thin film contracted in a direction perpendicular to the substrate after drying and surfactant removal.Removal of the surfactant template from both materials in order to create porous silica was achieved by calcination, ethanol extraction and peroxide-Fe treatments. Calcination was found to be the best method to remove surfactant from both mesostructures (hybrid-AOM and thin film). However, this was found to cause cracking and crumpling of the hybrid-AOM with the evaporated gold being easily peeled off after calcination. Ethanol extraction was thus applied where calcination was not suitable. The surfactant removal was confirmed using an infrared spectroscopy and the structure was confirmed after extraction using 1D X-ray diffraction (XRD). The surface morphology, porosity and crystallinity of the mesostructures prepared were characterized by nitrogen adsorption, scanning electron microscopy and small angle XRD. To form modified electrodes, the hybrid-AOM template was coated by evaporation with pure gold on one side, whilst the mesostructured thin film was grown on either gold or ITO. The permeability of the void space for both hybrid and thin film samples was calculated from the cyclic voltammetry response of a neutral probe (FcMeOH). Cationic ([Ru(bpy)3]2+) and anionic (I-) electroactive species were used to observe the electrochemical response under different pH regimes. FcMeOH was also used to study the effect of KCl concentration on the silica surface charge. Gold and platinum were electrochemically deposited using mesoporous silica as a template. Advisors/Committee Members: ANDERSON, MICHAEL MW, DRYFE, ROBERT RAW, Anderson, Mike, Dryfe, Robert.

Subjects/Keywords: Mesoporous; Thin film; Electrochemistry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Jalil, M. N. (2011). The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:118478

Chicago Manual of Style (16th Edition):

Jalil, Mohammad Noor. “The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 19, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:118478.

MLA Handbook (7th Edition):

Jalil, Mohammad Noor. “The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications.” 2011. Web. 19 Feb 2019.

Vancouver:

Jalil MN. The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2019 Feb 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:118478.

Council of Science Editors:

Jalil MN. The Preparation and Characterisation of Mesoporous Films for Electrochemical Applications. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:118478

2. Lai-Rowcroft, Lindsay Ling Gi. Novel Surfaces for MALDI-MS.

Degree: 2013, University of Manchester

Matrix assisted laser desorption/ionisation mass spectrometry (MALDI-MS) for small molecule analysis has been plagued with inherent problems associated with matrix interference. The matrix plays an important role in MALDI-MS where it has the ability to absorb UV energy from the laser employed and transfer it to the analyte, acts as a proton donor and protecting the analytes from being obliterated. For decades, research has been performed to eradicate matrix interference by matrix avoidance, finding alternative matrices, suppression through sample preparation methods and via chemical modification.In this investigation a number of the above mentioned approaches have been undertaken. First, a mesoporous silica powder, SBA-16, functionalised with a phenyl group to absorb UV from the MALDI-MS laser gave unfruitful results due to inhomogeneous dispersion of the SBA-16 powder. Therefore the same material was prepared but as a thin film and a homogeneously coated surface was generated with the phenyl group incorporated into the silica and this was compared with a conventional matrix, 2,5-dihydroxybenzoic acid (DHB). This was by far the most sensitive method which was accurate, with little background noise and importantly for small molecule analysis clear of matrix interference. Other surface systems were also tested such as graphene on copper and silver on copper, but the functionalised SBA-16 thin film remained the best. Graphite and 2B pencil were also investigated for MALDI-MS but were compared with conventional matrices (DHB and α-cyano-4-hydroxycinnamic acid (CHCA)) in a functional genomics study. The ability of all methods to find subtle phenotypic differences in various yeast strains was assessed with the help of multivariate data analysis (MVDA). Although DHB came out best, 2B pencil produce notably good separations that correlated nicely with the different genotypes. Therefore in addition to conventional matrices, 2B pencil should be considered for functional genomic studies when MALDI-MS is used as it is such a rapid and inexpensive method. Finally, chemical modifications were performed on amino acids where picolinic acid was used to attach a chromophore to the compounds, therefore, allowing UV absorption from the laser. Upon attaching the picolinate UV absorbing group, the amino acid compounds were detected LC-MS at an increased intensity of 10 to 100-fold. Moreover, enhanced separation in LC-MS was also observed.This project has successfully investigated alternative approaches to matrix-free MALDI-MS analysis. Functionalised SBA-16 thin films were by far the best method and this novel surface for MALDI-MS has the potential to transform small molecule analysis. Advisors/Committee Members: ANDERSON, MICHAEL MW, Anderson, Mike, Goodacre, Roy.

Subjects/Keywords: MALDI-MS; Novel surfaces; Mesoporous

…277 18 ABSTRACT The University of Manchester Lindsay Lai-Rowcroft PhD in Chemistry… …given The University of Manchester certain rights to use such Copyright, including for… …with more impending. In 2008 she commenced her PhD at The University of Manchester with… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Lai-Rowcroft, L. L. G. (2013). Novel Surfaces for MALDI-MS. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:189552

Chicago Manual of Style (16th Edition):

Lai-Rowcroft, Lindsay Ling Gi. “Novel Surfaces for MALDI-MS.” 2013. Doctoral Dissertation, University of Manchester. Accessed February 19, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:189552.

MLA Handbook (7th Edition):

Lai-Rowcroft, Lindsay Ling Gi. “Novel Surfaces for MALDI-MS.” 2013. Web. 19 Feb 2019.

Vancouver:

Lai-Rowcroft LLG. Novel Surfaces for MALDI-MS. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2019 Feb 19]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:189552.

Council of Science Editors:

Lai-Rowcroft LLG. Novel Surfaces for MALDI-MS. [Doctoral Dissertation]. University of Manchester; 2013. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:189552

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