Yuxiu Chen

Dr Yuxiu (Phil) Chen


H. Meng, NIALL CALUM BAILEY, YUXIU CHEN, LINGYU WANG, FRANCESCO CIAMPA, A Fabro, Dimitrios Chronopoulos, W Elmadih (2020)3D rainbow phononic crystals for extended vibration attenuation bands, In: Scientific reports10(1)18989 Nature

Abstract We hereby report for the first time on the design, manufacturing and testing of a three-dimensional (3D) nearly-periodic, locally resonant phononic crystal (PnC). Most of the research effort on PnCs and metamaterials has been focused on the enhanced dynamic properties arising from their periodic design. Lately, additive manufacturing techniques have made a number of designs with intrinsically complex geometries feasible to produce. These recent developments have led to innovative solutions for broadband vibration attenuation, with a multitude of potential engineering applications. The recently introduced concept of rainbow metamaterials and PnCs has shown a significant potential for further expanding the spectrum of vibration attenuation in such structures by introducing a gradient profile for the considered unit cells. Given the above, it is expected that designing non-periodic PnCs will attract significant attention from scientists and engineers in the years to come. The proposed nearly-periodic design is based on cuboid blocks connected by curved beams, with internal voids in the blocks being implemented to adjust the local masses and generate a 3D rainbow PnC. Results show that the proposed approach can produce lightweight PnCs of a simple, manufacturable design exhibiting attenuation bandwidths more than two times larger than the equivalent periodic designs of equal mass.

JS Sharpe, YL Chen, RM Gwilliam, AK Kewell, S Ledain, CN McKinty, MA Lourenco, T Butler, KP Homewood, KJR Kirkby, G Shao (2000)Structural characterisation of ion beam synthesised Ru2Si3, In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS161pp. 937-940
Yuxiu Chen, Simone Krings, Joshua R. Booth, Stefan A.F Bon, Suzie Hingley-Wilson, Joseph Keddie (2020)Introducing Porosity in Colloidal Biocoatings to Increase Bacterial Viability, In: Biomacromolecules American Chemical Society

A biocoating confines non-growing, metabolically-active bacteria within a synthetic colloidal polymer (i.e. latex) film. Bacteria encapsulated inside biocoatings can perform useful functions, such as a biocatalyst in wastewater treatment. A biocoating needs to have high a permeability to allow a high rate of mass transfer for rehydration and the transport of both nutrients and metabolic products. It therefore requires an interconnected porous structure. Tuning the porosity architecture is a challenge. Here, we exploited rigid tubular nanoclays (halloysite) and non-toxic latex particles (with a relatively high glass transition temperature) as the colloidal “building blocks” to tailor the porosity inside biocoatings containing Escherichia coli bacteria as a model organism. Electron microscope images revealed inefficient packing of the rigid nanotubes and proved the existence of nanovoids along the halloysite/polymer interfaces. Single-cell observations using confocal laser scanning microscopy provided evidence for metabolic activity of the E. coli within the biocoatings through the expression of yellow fluorescent protein. A custom-built apparatus was used to measure the permeability of a fluorescein sodium salt in the biocoatings. Whereas there was no measurable permeability in a coating made from only latex particles, the permeability coefficient of the composite biocoatings increased with increasing halloysite content up to a value of 110-4 m h-1. The effects of this increase in permeability was demonstrated through a specially-developed resazurin reduction assay. Bacteria encapsulated in halloysite composite biocoatings had statistically significant higher metabolic activities in comparison to bacteria encapsulated in a non-optimized coating made from latex particles alone.

H Aihara, CA Prieto, D An, SF Anderson, E Aubourg, E Balbinot, TC Beers, AA Berlind, SJ Bickerton, D Bizyaev, M Blanton, JJ Bochanski, AS Bolton, J Bovy, WN Brandt, J Brinkmann, P Brown, JR Brownstein, NG Busca, H Campbell, MA Carr, Y Chen, C Chiappini, J Comparat, N Connolly, M Cortes, RAC Croft, A Cuesta, LN Da Costa, JRA Davenport, K Dawson, S Dhital, A Ealet, G Ebelke, EM Edmondson, DJ Eisenstein, S Escoffier, M Esposito, ML Evans, X Fan, BF Castellá, A Font-Ribera, P Frinchaboy, J Ge, BA Gillespie, G Gilmore, JIG Hernández, JR Gott, A Gould, EK Grebel, JE Gunn, JC Hamilton, P Harding, DW Harris, SL Hawley, FR Hearty, S Ho, DW Hogg, JA Holtzman, K Honscheid, N Inada, II Ivans, L Jiang, JA Johnson, C Jordan, W Jordan, EA Kazin, D Kirkby, MA Klaene, GR Knapp, JP Kneib, CS Kochanek, L Koesterke, JA Kollmeier, RG Kron, H Lampeitl, D Lang, JM Le Goff, YS Lee, YT Lin, DC Long, CP Loomis, S Lucatello, B Lundgren, RH Lupton, Z Ma (2011)Erratum: The eighth data release of the sloan digital sky survey: First data from SDSS-III (The Astrophysical Journal Supplement Series (2011) 193 (29)), In: Astrophysical Journal, Supplement Series195(2)
JR Varcoe, RCT Slade, GL Wright, Y Chen (2006)Steady-state dc and impedance investigations of H-2/O-2 alkaline membrane fuel cells with commercial Pt/C, Ag/C, and Au/C cathodes, In: JOURNAL OF PHYSICAL CHEMISTRY B110(42)pp. 21041-21049 AMER CHEMICAL SOC
JS Sharpe, YL Chen, RM Gwilliam, AK Kewell, CN McKinty, MA Lourenco, G Shao, KP Homewood, KR Kirkby (1999)Ion beam synthesized Ru2Si3, In: APPLIED PHYSICS LETTERS75(9)pp. 1282-1283 AMER INST PHYSICS
BB Skorodumov, GV Rogachev, P Boutachkov, A Aprahamian, VZ Goldberg, A Mukhamedzhanov, S Almaraz, H Amro, FD Becchetti, S Brown, Y Chen, H Jiang, JJ Kolata, LO Lamm, M Quinn, A Woehr (2007)Lowest excited states of O-13, In: PHYSICAL REVIEW C75(2)ARTN 0pp. ?-? AMERICAN PHYSICAL SOC