Christopher. J. Kiely

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A Nion spherical-aberration (Cs) corrector was recently installed on Lehigh University's 300-keV cold field-emission gun (FEG) Vacuum Generators HB 603 dedicated scanning transmission electron microscope (STEM), optimized for X-ray analysis of thin specimens. In this article, the impact of the Cs-corrector on X-ray analysis is theoretically evaluated, in(More)
A. J. Papworth, C. J. Kiely, A. P. Burden, S. R. P. Silva,* and G. A. J. Amaratunga Department Electrical and Electronic Engineering, University of Liverpool, Liverpool, L69 3GJ, United Kingdom Department of Engineering, Materials Science and Engineering, University of Liverpool, Liverpool, L69 3BX, United Kingdom School of Electronic Engineering,(More)
The strength of PtOx-support and Pt-support interactions was investigated for supported PtOx/SiO2, PtOx/ Al2O3, and PtOx/CeO2 catalysts with time-resolved in situ Raman/IR spectroscopy and scanning transmission electron microscopy (STEM). Raman spectroscopy (and STEM-X-ray energy-dispersive spectoscopy, XEDS) was able to distinguish between crystalline PtO2(More)
Biological therapy, particularly the anti-tumour necrosis factor (TNF) antibodies, infliximab and adalimumab, are used for the maintenance of remission for patients with inflammatory bowel diseases (IBD). We present 21 pregnancies in IBD patients exposed to anti-TNF agents between 2007 and 2014. Our study demonstrates that anti-TNF therapy is safe and(More)
Laser-Arc evaporation of a graphite target has been used to deposit carbon films that exhibit high hardness (45 GPa) and elastic recovery (85%). High Resolution Electron Microscopy (HREM) and Electron Energy Loss Spectroscopy (EELS) were subsequently used to study the microstructure and bonding of the resultant layers. The structure of the films from HREM(More)
A new preparative route for vanadium phosphate catalysts is described using supercritical CO2 as an antisolvent. The amorphous microspheroidal VPO produced is shown to be more active than comparable crystalline VPO catalysts for the selective oxidation of n-butane to maleic anhydride and, furthermore, does not require an extensive pre-treatment or(More)
A modified cathodic arc technique has been used to deposit carbon nitride thin films directly on n Si substrates. Transmission Electron Microscopy showed that clusters of fullerene-like nanoparticles are embedded in the deposited material. Field emission in vacuum from as-grown films starts at an electric field strength of 3.8 V/μm. When the films were(More)
The detailed understanding of the electronic properties of carbon-based materials requires the determination of their electronic structure and more precisely the calculation of their joint density of states (JDOS) and dielectric constant. Low electron energy loss spectroscopy (EELS) provides a continuous spectrum which represents all the excitations of the(More)
We have prepared supported gold, palladium and gold–palladium bimetallic catalysts by the physical mixing of the acetate salts of the metals followed by a simple heat treatment. The use of the acetates as the metal precursor eliminates chloride from the catalyst preparation step. Extensive characterisation shows the formation of bimetallic alloy particles.(More)
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