S T R U C T U R E O F M A T E R I A L S
S C I E N T I F I C H I G H L I G H T S
1 4 6 H I G H L I G H T S 2 0 2 1 I
PRINCIPAL PUBLICATIONS AND AUTHORS
Location and characterization of heterogeneous phases within Mary Rose wood, K.M.Ø. Jensen (a), E.R. Aluri (b,c), E. Sanchez Perez (b,c), G.B.M. Vaughan (d), M. Di Michel (d), E.J. Schofield (e), S.J.L. Billinge (f,g), S.A. Cussen (b,c), Matter 5, 150-161 (2022); https:/doi.org/10.1016/j.matt.2021.09.026 (a) Department of Chemistry, University of Copenhagen (Denmark) (b) Department of Chemical and Biological Engineering, University of Sheffield (UK) (c) Department of Materials Science and Engineering, University of Sheffield (UK) (d) ESRF (e) The Mary Rose Trust, HM Naval Base, Portsmouth (UK) (f) Department of Applied Physics and Applied Mathematics, Columbia University, New York (USA) (g) Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, New York (USA)
REFERENCES
[1] M. Sandstrom et al., PNAS U.S.A 102, 14165-14170 (2005). [2] A.V. Chadwick et al., J. Non- Cryst. Solids 451, 49-55 (2016). [3] K.M. Wetherall et al., J. Archaeol. Sci. 35, 1317-1328 (2008). [4] E.J. Schofield, Nat. Rev. Mater. 3, 285-287 (2018). [5] S.D.M. Jacques et al., Nat. Commun. 4, 2536 (2013).
and it was possible to map deposits of polyethylene glycol (PEG), a polymer that has been used in the wood conservation.
This use of ctPDF to map and characterise nanostructured phases in the wood thus results in crucial insights into the nature of compounds responsible for potential wood degradation, and the knowledge it provides can be used to further devise future conservation strategies.
Quantitative and spatial description of the highly selective active sites in Cu-omega zeolite for methane-to- methanol conversion
Cu-omega zeolite provides the ideal environment to selectively convert methane to methanol by a stepwise process. By employing complementary characterisation techniques such as anomalous X-ray powder diffraction, EXAFS and PDF, as well as theoretical modelling, a comprehensive description of the active sites was elucidated both spatially and quantitatively.
Fig. 130: Structures of copper species after activation in oxygen and after reaction in methane.
Fig. 129: a) Map of the scattering intensity at Q = 20 Å-1 representing the overall electron density.
b) Map of the scattering intensity at Q = 3.3 Å-1 representing the presence of sphalerite nanoparticles.
c) PDF obtained from a voxel containing mainly cellulose and lignin. d) PDF obtained from a voxel
containing sphalerite nanoparticles.
