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Instruments / Technical Area	Publication Details	Published
	Energy dispersive-EXAFS of Pd nucleation at a liquid/liquid interface S.-Y. Chang , S. G.l Booth , A. Uehara-Kasuno , J. F. W. Mosselmans , G. Cibin , V.-T. Pham , L. Nataf , R. A. W. Dryfe , S. L. M. Schroeder Journal Of Physics: Conference Series 712 XAFS 16 DOI: 10.1088/1742-6596/712/1/012058 Open Access Show Abstract ▼ Abstract: Energy dispersive extended X-ray absorption fine structure (EDE) has been applied to Pd nanoparticle nucleation at a liquid/liquid interface under control over the interfacial potential and thereby the driving force for nucleation. Preliminary analysis focusing on Pd K edge-step height determination shows that under supersaturated conditions the concentration of Pd near the interface fluctuate over a period of several hours, likely due to the continuous formation and dissolution of sub-critical nuclei. Open circuit potential measurements conducted ex-situ in a liquid/liquid electrochemical cell support this view, showing that the fluctuations in Pd concentration are also visible as variations in potential across the liquid/liquid interface. By decreasing the interfacial potential through inclusion of a common ion (tetraethylammonium, TEA+) the Pd nanoparticle growth rate could be slowed down, resulting in a smooth nucleation process. Eventually, when the TEA+ ions reached an equilibrium potential, Pd nucleation and particle growth were inhibited.	May 2016
I15-Extreme Conditions	Bulk and molecular compressibilities of organic–inorganic hybrids [(CH3)4N]2MnX4 (X = Cl, Br); role of intermolecular interactions Antonio Barreda , Lucie Nataf , Yamilet Rodriguez-Lazcano , Fernando Aguado , Jesus Gonzalez , Rafael Valiente , Fernando Rodriguez , Heribert Wilhelm , Andrew Jephcoat Inorganic Chemistry 53 (19), 10708 - 10715 DOI: 10.1021/ic501854g Diamond Proposal Number(s): [891] Show Abstract ▼ Abstract: Organic-Inorganic Hybrid Materials; Molecular compression; Equation of State; Gruneisen parameters; Bulk compressibility; Tetra Methylammonium ion; MnCl4; MnBr4	Oct 2014
I15-Extreme Conditions	Progressive pressure-induced transformation from isolated MnX4 (Td) to exchange-coupled MnX6 (Oh) systems in A2MnX4 (X:Cl,Br) crystals Y. Rodriguez-lazcano , L. Nataf , F. Aguado , F. Rodriguez , A. Jephcoat , H. Wilhelm Proceedings of the AIRAPT Conference, Tokyo (2009) DOI: 10.1088/1742-6596/215/1/012043 Diamond Proposal Number(s): [891] Show Abstract ▼ Abstract: This work reports a correlation study between the crystal structure and photoluminescence (PL) in A(2)MnX(4) (A: [CH(3)](4)N; X: Cl, Br) by means of simultaneously optical spectroscopy and x-ray diffraction (XRD) under pressure. These materials are attractive systems for PL studies under pressure since they are very compressible and the interaction between organic/inorganic ((CH(3))(4)N(-)/MnX(4)(2-)) tetrahedra strongly affects the PL efficiency, which is fully related to the isolated T(d) MnX(4)(2-). We show that pressure induces strong redshifts of emission peak of MnX(4)(2-) as well as decomposition processes at higher pressures yielding new aggregated phases of Mn(2+) and amorphization which deeply affect Mn(2+) PL. The equation of state of each compound is reported from XRD data.	Jan 2010

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