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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Exploring the mechanisms of metal co-catalysts in photocatalytic reduction reactions: Is Ag a good candidate? Qian Yang , Wilm Jones , Peter P. Wells , David Morgan , Lichun Dong , Baoshan Hu , Nikolaos Dimitratos , Mingdong Dong , Mike Bowker , Flemming Besenbacher , Ren Su , Graham Hutchings Applied Catalysis A: General 518, 213-220 DOI: 10.1016/j.apcata.2015.10.023 Diamond Proposal Number(s): [8071] Show Abstract ▼ Abstract: Metal co-catalysts are essential for enhancing photocatalytic performance, especially in reduction reactions using semiconductor photocatalyst materials as a consequence of the reduced recombination kinetics of charge carriers by spatial charge separation. Generally Au, Pd, Pt, and their alloys are more promising candidates than Ag for photocatalytic H2 evolution experiments, although Ag can trap more electrons having more negative reduction potential than that of Au, Pd, and Pt. Here we have synthesized and examined well-defined Au, Ag, and core-shell structured Au–Ag nanoparticles as co-catalysts for TiO2 in photocatalytic H2 evolution. By varying the dissolved oxygen in the reaction suspension, we found that selective photocatalytic reduction can be achieved by fine tuning the co-catalyst materials. Whilst Au NPs are superior for proton reduction, Ag NPs exhibits excellent performance for oxygen reduction. All core-shell structured Au–Ag NPs show non-selectivity in photocatalytic reduction of proton and oxygen	Oct 2015
B23-Circular Dichroism	Resolving protein mixtures using microfluidic diffusional sizing combined with synchrotron radiation circular dichroism Christian Bortolini , Tadas Kartanas , Davor Copic , Itzel Condado Morales , Yuewen Zhang , Pavan K. Challa , Quentin Peter , Tamas Javorfi , Rohanah Hussain , Mingdong Dong , Giuliano Siligardi , Tuomas P. J. Knowles , Jerome Charmet Lab On A Chip 15 DOI: 10.1039/C8LC00757H Diamond Proposal Number(s): [14750, 15005, 15592, 16203] Show Abstract ▼ Abstract: Circular dichroism spectroscopy has become a powerful tool to characterise proteins and other biomolecules. For heterogeneous samples such as those present for interacting proteins, typically only average spectroscopic features can be resolved. Here we overcome this limitation by using free-flow microfluidic size separation in-line with synchrotron radiation circular dichroism to resolve the secondary structure of each component of a model protein mixture containing monomers and fibrils. To enable this objective, we have integrated far-UV compatible measurement chambers into PDMS-based microfluidic devices. Two architectures are proposed so as to accommodate for a wide range of concentrations. The approach, which can be used in combination with other bulk measurement techniques, paves the way to the study of complex mixtures such as the ones associated with protein misfolding and aggregation diseases including Alzheimer's and Parkinson's diseases.	Nov 2018

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