Yr Athro Emyr Macdonald

Grŵp Mater Cyddwysedig a Ffotoneg

: Macdonald@caerdydd.ac.uk
: +44 29208 76766
: Adeiladau'r Frenhines - estyniad y Gorllewin, Ystafell WX/3.08, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA

: Siarad Cymraeg

Yn ystod fy ngyrfa ymchwil, rwyf wedi cyhoeddi tua 120 o bapurau wedi'u dyfarnu. Am y rhan fwyaf o'r amser hwn canolbwyntiais ar ddatblygu cymwysiadau technegau diffreithiant i ddatrys problemau heriol amserol yn ymwneud â strwythur atomig solidau, ffilmiau tenau ac arwynebau. Perfformir llawer o'r gwaith hwn yn y Synchrotron Ffynhonnell Ymbelydredd Ewropeaidd yng Ngrenoble a'r Diamond Light Source ger Rhydychen.

Yn ystod y degawd diwethaf, mae fy meysydd ymchwil wedi ehangu i gynnwys agweddau ar nanowyddoniaeth foleciwlaidd. Mae ein grŵp wedi perfformio mesuriadau trydanol nanoraddfa ar foleciwlau protein sengl, nanodiwbiau a ffilmiau moleciwlaidd tenau. Mae'r materion gwyddonol sylfaenol hyn yn bwysig mewn biosynwyryddion bychain newydd ac yn sail i nanodechnoleg moleciwlaidd yn y dyfodol.

Yn ogystal ag ymchwil, rwyf wedi chwarae rhan weithredol mewn addysgu a gweinyddu o fewn yr adran, fel y rhestrir yn y datganiad gyrfa. Rwyf wedi dysgu ystod eang o gyrsiau/modiwlau dros bob blwyddyn 0-4 yn ogystal ag ar lefel ôl-raddedig. Rhestrir y cyfrifoldebau addysgu presennol o dan y tab priodol.

Mae'r rolau sydd ar hyn o bryd yn yr Ysgol Ffiseg a Seryddiaeth yn cynnwys:

Swyddog Diogelu Ymbelydredd

2024

Harding, E. et al. 2024. Imaging the magnetic nanowire cross-section and magnetic ordering within a suspended 3D artificial spin-ice. APL Materials 12, article number: 21116. (10.1063/5.0176907)

2020

Abdullah, I., Macdonald, J. E., Lin, Y., Anthopoulos, T. D., Hma Salahr, N., AnwarKakil, S. and Muhammedsharif, F. F. 2020. Bias stability of solution-processed In2O3 thin film transistors. Journal of Physics: Materials 4, article number: 15003. (10.1088/2515-7639/abc608)
Thomas, S. K. et al. 2020. Site-specific protein photochemical covalent attachment to carbon nanotube side walls and its electronic impact on single molecule function. Bioconjugate Chemistry 31(3), pp. 584-594. (10.1021/acs.bioconjchem.9b00719)

2014

Môn, D. et al. 2014. Bimodal crystallization at polymer–fullerene interfaces. Physical Chemistry Chemical Physics 17(3), pp. 2216-2227. (10.1039/C4CP04253K)
Guilbert, A. A. Y., Frost, J. M., Agostinelli, T., Pires, E., Lilliu, S., MacDonald, J. E. and Nelson, J. 2014. Influence of bridging atom and side chains on the structure and crystallinity of cyclopentadithiophene-benzothiadiazole polymers. Chemistry of Materials 26(2), pp. 1226-1233. (10.1021/cm403410w)

2013

Lilliu, S. et al. 2013. EFM data mapped into 2D images of tip-sample contact potential difference and capacitance second derivative. Scientific Reports 3, article number: 3352. (10.1038/srep03352)
Pires, E., MacDonald, J. E. and Elliott, M. 2013. Chain length and temperature dependence of alkanedithiol molecular conductance under ultra high vacuum. Nanoscale 5(19), pp. 9397-9403. (10.1039/c3nr03682k)
Dane, T. G. et al. 2013. Oligo(aniline) nanofilms: from molecular architecture to microstructure. Soft Matter 9(44), pp. 10501-10511. (10.1039/c3sm51407b)
Al Naim, A. et al. 2013. Water-gated organic nanowire transistors. Organic Electronics 14(4), pp. 1057-1063. (10.1016/j.orgel.2013.01.024)
Dragoneas, A., Grell, M., Hampton, M. D. and Macdonald, J. E. 2013. Morphology-driven sensitivity enhancement in organic nanowire chemiresistors. Sensor Letters 11(3), pp. 552-555. (10.1166/sl.2013.2917)

2012

Della Pia, E. A., Macdonald, J. E., Elliott, M. and Jones, D. D. 2012. Direct binding of a redox protein for single-molecule electron transfer measurements. Small 8(15), pp. 2341-2344. (10.1002/smll.201102416)
Della Pia, E. A., Elliott, M., Jones, D. D. and Macdonald, J. E. 2012. Orientation-dependent electron transport in a single redox protein [RETRACTED]. ACS Nano 6(1), pp. 355-361. (10.1021/nn2036818)
Della Pia, E. A., Chi, Q., Macdonald, J. E., Ulstrup, J., Jones, D. D. and Elliott, M. 2012. Fast electron transfer through a single molecule natively structured redox protein. Nanoscale 4(22), pp. 7106-7113. (10.1039/c2nr32131a)
Della Pia, E. A., Chi, Q., Elliott, M., Macdonald, J. E., Ulstrup, J. and Jones, D. D. 2012. Redox tuning of cytochrome b562 through facile metal porphyrin substitution. Chemical Communications 48(86), pp. 10624-10626. (10.1039/c2cc34302a)
Lilliu, S., Agostinelli, T., Hampton, M., Pires, E., Nelson, J. and Macdonald, J. E. 2012. The influence of substrate and top electrode on the crystallization dynamics of P3HT: PCBM blends. Energy Procedia 31, pp. 60-68. (10.1016/j.egypro.2012.11.165)

2011

Lilliu, S., Böberl, M., Sramek, M., Tedde, S. F., Macdonald, J. E. and Hayden, O. 2011. Inkjet-printed organic photodiodes. Thin Solid Films 520(1), pp. 610-615. (10.1016/j.tsf.2011.08.004)
Lilliu, S. et al. 2011. Effects of thermal annealing upon the nanomorphology of poly(3-hexylselenophene)-PCBM blends. Macromolecular Rapid Communications 32(18), pp. 1454-1460. (10.1002/marc.201100330)
Agostinelli, T. et al. 2011. The role of alkane dithiols in controlling polymer crystallization in small band gap polymer:Fullerene solar cells. Journal of Polymer Science Part B: Polymer Physics 49(10), pp. 717-724. (10.1002/polb.22244)
Agostinelli, T. et al. 2011. Real-time investigation of crystallization and phase-segregation dynamics in P3HT:PCBM solar cells during thermal annealing. Advanced Functional Materials 21(9), pp. 1701-1708. (10.1002/adfm.201002076)
Della Pia, E. A., Chi, Q., Jones, D. D., Macdonald, J. E., Ulstrup, J. and Elliott, M. 2011. Single-molecule mapping of long-range electron transport for a cytochrome b562 variant. Nano Letters 11(1), pp. 176-182. (10.1021/nl103334q)
Lilliu, S., Agostinelli, T., Pires, E., Hampton, M. D., Nelson, J. and Macdonald, J. E. 2011. Dynamics of crystallization and disorder during annealing of P3HT/PCBM bulk heterojunctions. Macromolecules 44(8), pp. 2725-2734. (10.1021/ma102817z)
Sedghi, G. et al. 2011. Long-range electron tunnelling in oligo-porphyrin molecular wires. Nature Nanotechnology 6(8), pp. 517-523. (10.1038/nnano.2011.111)
Schuettfort, T., Huettner, S., Lilliu, S., Macdonald, J. E., Thomsen, L. and McNeill, C. R. 2011. Surface and bulk structural characterization of a high-mobility electron-transporting polymer. Macromolecules 44(6), pp. 1530-1539. (10.1021/ma102451b)

2010

Bennett, N., Xu, G., Esdaile, L. J., Anderson, H. L., Macdonald, J. E. and Elliott, M. 2010. Transition voltage spectroscopy of porphyrin molecular wires. Small 6(22), pp. 2604-2611. (10.1002/smll.201001046)
Xu, G., Woodruff, D. P., Bennett, N., Elliott, M. and Macdonald, J. E. 2010. STM study of molecule double-rows in mixed self-assembled monolayers of alkanethiols. Langmuir 26(11), pp. 8174-8179. (10.1021/la9044754)
Keivanidis, P. E. et al. 2010. Dependence of charge separation efficiency on film microstructure in poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl-C61Butyric acid methyl ester blend films. Journal of Physical Chemistry Letters 1(4), pp. 734-738. (10.1021/jz900296f)
Wang, T. et al. 2010. The development of nanoscale morphology in polymer: fullerene photovoltaic blends during solvent casting. Soft Matter 6(17), pp. 4128-4134. (10.1039/c0sm00343c)

2009

Zeng, X., Liu, F., Fowler, A. G., Ungar, G., Cseh, L., Mehl, G. H. and Macdonald, J. E. 2009. 3D ordered gold strings by coating nanoparticles with mesogens. Advanced Materials 21(17), pp. 1746-1750. (10.1002/adma.200803403)
Simmonds, H. S., Bennett, N., Elliott, M. and Macdonald, J. E. 2009. Self-assembled organic nanowires: a structural and electronic study. Journal of Vacuum Science and Technology. B, Nanotechnology and Microelectronics : Materials, Processing, Measurement, and Phenomena 27(2), article number: 831. (10.1116/1.3054198)
Droge, S. et al. 2009. Grazing Incidence X-ray Diffraction of a Photoaligned Nematic Semiconductor. Journal of Physical Chemistry B 113(1), pp. 49-53. (10.1021/jp803379a)

2008

Zeng, X. B., Liu, F., Xie, F., Ungar, G., Tschierske, C. and Macdonald, J. E. 2008. Small angle X-ray and neutron scattering in the study of polymers and supramolecular systems. Presented at: International Conference on Neutron and X-Ray Scattering, Serpong and Bandung, Indonesia, 23-31 July 2007 Presented at Ikram, A. ed.Neutron and X-Ray Scattering in Materials Science and Biology. AIP Conference Proceedings Vol. 989. Melville, NY: American Institute of Physics pp. 68., (10.1063/1.2906097)

2006

Das, A., Lei, C. H., Elliott, M., Macdonald, J. E. and Turner, M. L. 2006. Non-Lithographic Fabrication of PEDOT Nanowires Between Fixed Au Electrodes. Organic Electronics 7(4), pp. 181-187. (10.1016/j.orgel.2005.12.006)
Das, A., Lei, C. H., Thomas, H. E., Elliott, M., Macdonald, J. E., Glarvey, P. and Turner, M. L. 2006. EFM Phase Investigation of the Metal-Organic Film Interface. Applied Surface Science 252(15), pp. 5477-5480. (10.1016/j.apsusc.2005.12.091)

2005

Jukes, P. C. et al. 2005. Kinetics of surface crystallization in thin films of poly(ethylene terephthalate). Macromolecules 38(6), pp. 2315-2320. (10.1021/ma0490606)

2004

Macdonald, J. E. et al. 2004. Applications of grazing incidence diffraction to polymer surfaces. Radiation Physics and Chemistry 71(3-4), pp. 811-815. (10.1016/j.radphyschem.2004.04.104)
Lei, C. H., Das, A., Elliott, M., Macdonald, J. E. and Turner, M. L. 2004. Au-poly(3-hexylthiophene) Contact Behaviour at High Resolution. Synthetic Materials 145(2-3), pp. 217-220. (10.1016/j.synthmet.2004.05.003)
Lei, C. H., Das, A., Elliott, M. and Macdonald, J. E. 2004. Quantitative Electrostatic Force Microscopy-Phase Measurements. Nanotechnology 15(5), pp. 627-634. (10.1088/0957-4484/15/5/038)
Bolognesi, A. et al. 2004. Structural features in aligned poly(3-alkylthiophene) films revealed by grazing incidence X-ray diffraction. Polymer 45(12), pp. 4133-4138. (10.1016/j.polymer.2004.03.102)

2003

Lei, C. H., Das, A., Elliott, M. and Macdonald, J. E. 2003. Conductivity of Macromolecular Networks Measured by Electrostatic Force Microscopy. Applied Physics Letters 83, pp. 482-484. (10.1063/1.1592888)

2002

Durell, M. et al. 2002. The Role of Surface-Induced Ordering in the Crystallisation of PET Films. Europhysics Letters 58, pp. 844-850. (10.1209/epl/i2002-00451-1)
Kawana, S. et al. 2002. X-ray diffraction study of the structure of thin polyfluorene films. Polymer 43(6), pp. 1907-1913. (10.1016/S0032-3861(01)00753-4)

2001

Lu, J., Haworth, L., Westwood, D. and Macdonald, J. E. 2001. Initial stages of molecular-beam epitaxy growth of GaN on 6H-SiC(0001). Applied Physics Letters 78(8), pp. 1080-1083. (10.1063/1.1350430)
Macdonald, J. E., Durell, M., Lu, C., Jones, R., Jukes, P. and Grell, M. 2001. Surface-induced ordering in polymers [Abstract]. Abstracts of Papers of the American Chemical Society 221(1), pp. U352.

2000

Haworth, L., Lu, J., Westwood, D. and MacDonald, J. E. 2000. Investigation into the influence of buffer and nitrided layers on the initial stages of GaN growth on InSb (100). Applied Surface Science 166(1-4), pp. 418-422. (10.1016/S0169-4332(00)00460-8)
Haworth, L., Lu, J., Westwood, D. and Macdonald, J. E. 2000. Atomic hydrogen cleaning, nitriding and annealing InSb (100). Applied Surface Science 166(1-4), pp. 253-258. (10.1016/S0169-4332(00)00425-6)

1999

Lu, J., Westwood, D., Haworth, L., Hill, P. and Macdonald, J. E. 1999. The (3 × 3) reconstruction and its evolution during the nitridation of GaAs(001). Thin Solid Films 343-44, pp. 567-570. (10.1016/S0040-6090(98)01716-7)
Edwards, K. A., Howes, P. B., Macdonald, J. E., Hibma, T., Bootsma, T. and James, M. A. 1999. Observation of a structural transition during the low-temperature growth of the Si(111)7×7?Pb interface. Surface Science 424(2-3), pp. 169-178. (10.1016/S0039-6028(98)00880-2)
Lu, J., Haworth, L., Hill, P., Westwood, D. and Macdonald, J. E. 1999. Nitridation of the GaAs(001) surface: Thermal behavior of the (3×3) reconstruction and its evolution. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 17(4), pp. 1659-1676. (10.1116/1.590806)

1998

Howes, P. B., Edwards, K. A., Macdonald, J. E., Hibma, T., Bootsman, T., James, M. A. and Nicklin, C. L. 1998. The atomic structure of the Si(111)-Pb buried interface grown on the reconstruction. Surface Review and Letters 5(1), article number: 163. (10.1142/S0218625X98000311)
Hill, P., Lu, J., Haworth, L., Westwood, D. and Macdonald, J. E. 1998. An XPS study of the effect of nitrogen exposure time and temperature on the GaAs(001) surface using atomic nitrogen. Applied Surface Science 123-4, pp. 126-124. (10.1016/S0169-4332(97)00539-4)
Haworth, L. et al. 1998. Formation of an Sb-N compound during nitridation of InSb (001) substrates using atomic nitrogen. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 16(4), pp. 2254-2261. (10.1116/1.590158)

1997

Bennett, M. R., Dunscombe, C. J., Cafolla, A. A., Cairns, J. W., Macdonald, J. E. and Williams, R. H. 1997. Photoemission studies of the surfactant-aided growth of Ge on Te-terminated Si(100). Surface Science 380(2-3), pp. 178-189. (10.1016/S0039-6028(96)01149-1)
Schmicker, D. et al. 1997. Low-temperature growth of thin Pb layers and the quantum size effect. Journal of Physics: Condensed Matter 9(5), article number: 969. (10.1088/0953-8984/9/5/004)
Hill, P., Westwood, D., Howarth, L., Lu, J. and MacDonald, J. E. 1997. Nitridation of the GaAs (001) surface using atomic nitrogen. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 15(4), pp. 1133-1139. (10.1116/1.589427)

1996

Levermann, A. H. et al. 1996. The atomic structure of the Si(111) reconstruction. Applied Surface Science 104-05, pp. 124-129. (10.1016/S0169-4332(96)00132-8)
Levermann, A. H., Woolf, D. A., Westwood, D. and MacDonald, J. E. 1996. An investigation by spot profile analysis low energy electron diffraction of Si grown on GaAs(001). Surface Science 352-54, pp. 812-816. (10.1016/0039-6028(95)01281-8)

1995

Howes, P. B., Edwards, K. A., Hughes, D. J., MacDonald, J. E., Hibma, T., Bootsma, T. and James, M. A. 1995. A surface X-ray diffraction study of the Si(111)?Pb-buried interface. Surface Science 331-33(A), pp. 646-650. (10.1016/0039-6028(95)00382-7)
Howes, P. B., Edwards, K. A., Hughes, D. J., MacDonald, J. E., Hibma, T., Bootsma, T. and James, M. 1995. Influence of interfacial atomic structure on the Schottky-barrier height of Si(111)-Pb. Physical Review B 51(24), pp. 17740-17743. (10.1103/PhysRevB.51.17740)

1994

Finney, M. S., Norris, C., Howes, P. B., James, M. A., MacDonald, J. E., Johnson, A. D. and Vlieg, E. 1994. The growth and atomic structure of the Si(1 1 1)-indium interface studied by surface X-ray diffraction. Physica B: Condensed matter 198(1-3), pp. 246-248. (10.1016/0921-4526(94)90171-6)
Tabata, A., Benyattou, T., Guillot, G., Clark, S. A., MacDonald, J. E., Westwood, D. and Williams, R. H. 1994. Strain relaxation studied by photoluminescence and by double crystal X-ray diffraction measurements in strained InGaAs. Materials Science and Engineering: B 22(2-3), pp. 222-226. (10.1016/0921-5107(94)90248-8)

1993

Tabata, A. et al. 1993. Photoluminescence study of the 2D electron gas formed at the interface of strained InGaAs/InP single heterostructures. Applied Surface Science 65-66, pp. 814-820. (10.1016/0169-4332(93)90761-Y)
MacDonald, J. E., Thornton, J. M. C., Williams, A. A., Ashu, P., Matthai, C. C., Vandervegt, H. A. and Vlieg, E. 1993. Strain distribution during growth of GE/SI(001) and the effect of surfactant layers. Journal of Scanning Microscopy 7(2), pp. 497-502.

1992

Lohmeier, M., van der Vegt, H. A., van Silfhout, R. G., Vlieg, E., Thornton, J. M. C., MacDonald, J. E. and Scholte, P. M. L. O. 1992. Asymmetrical dimers on the Ge(001)-2 × 1-Sb surface observed using X-ray diffraction. Surface Science 275(3), pp. 190-200. (10.1016/0039-6028(92)90793-6)
Clark, S. A., MacDonald, J. E., Westwood, D. and Williams, R. H. 1992. Relaxation in InxGa1-xAs/InP for compressive and tensile strain. Journal of Crystal Growth 121(4), pp. 743-750. (10.1016/0022-0248(92)90582-4)
Thornton, J. M. C., Williams, A. A., MacDonald, J. E., van Silfhout, R. G., Finney, M. S. and Norris, C. 1992. Strain relaxation during the surfactant modified epitaxial growth of Ge/Si(001). Surface Science 273(1-2), pp. 1-8. (10.1016/0039-6028(92)90270-G)
Griffiths, C. L., MacDonald, J. E. and Williams, R. H. 1992. The growth and characterisation of epitaxial insulating HoF3 layers on silicon. Applied Surface Science 56-58(2), pp. 782-788. (10.1016/0169-4332(92)90338-X)
Edge, S., Dent, A. J., Underhill, A. E. and MacDonald, J. E. 1992. Extended X-ray absorption fine structure (EXAFS) spectroscopy studies on polypyrrole bromide. Synthetic Metals 52(3), pp. 383-386. (10.1016/0379-6779(92)90037-J)

1991

MacDonald, J. E., Williams, A. A., Thornton, J. M. C., Vansilfhout, R. G., Vanderveen, J. F., Finney, M. S. and Norris, C. 1991. Grazing-incidence x-ray-diffraction studies of strain relaxation in monolayer-thick films. Presented at: 7th Conference on Microscopy of Semiconducting Materials, Oxford, UK, 25-28 March 1991 Presented at Cullis, A. G. and Long, N. J. eds.Microscopy of semiconducting materials 1991: Conference Papers, Vol. 117. Institute of Physics Conference Series London: Institute of Physics pp. 645-650.
Williams, A. et al. 1991. Strain relaxation during the initial stages of growth in Ge/Si(001). Physical Review B 43(6), pp. 5001-5011. (10.1103/PhysRevB.43.5001)
Thornton, J. M. C., Williams, A., MacDonald, J. E., van Silfhout, R., van der Veen, J., Finney, M. and Norris, C. 1991. The influence of Sb as a surfactant on the strain relaxation of Ge/Si(001). Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 9(4), pp. 2146-2150. (10.1116/1.585754)
Petrich, G. S., Dabiran, A. M., MacDonald, J. E. and Cohen, P. I. 1991. The effect of submonolayer Sn δ-doping layers on the growth of InGaAs and GaAs. Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 9(4), pp. 2150-2154. (10.1116/1.585755)
Johnson, A., Norris, C., Frenken, J., Derbyshire, H., MacDonald, J. E., Van Silfhout, R. and Van Der Veen, J. 1991. Combined (1×2)?(1×1) transition and atomic roughening of Ge(001) studied with surface x-ray diffraction. Physical Review B 44(3), pp. 1134-1138. (10.1103/PhysRevB.44.1134)
Griffiths, C. L., MacDonald, J. E. and Williams, R. H. 1991. Growth of pseudomorphic insulating HoF3 layers on Si(111). Journal of Applied Physics 70(3), pp. 1858-1861. (10.1063/1.349506)

1990

van Silfhout, R. G., van der Veen, J. F., Norris, C. and MacDonald, J. E. 1990. Structure of the Ge(111)-c(2 ? 8) surface as determined from scattered X-ray intensities along crystal truncation rods. Faraday Discussions of the Chemical Society 89, pp. 169-180. (10.1039/dc9908900169)
Slijkerman, W. F. J. et al. 1990. X-ray reflectivity of an Sb delta-doping layer in silicon. Journal of Applied Physics 68(10), pp. 5105-5109. (10.1063/1.347047)
Robinson, I. K. et al. 1990. Structure of surfaces and interfaces as studied using synchrotron radiation - discussion. Faraday Discussions of the Chemical Society 89, pp. 201-210. (10.1039/dc9908900201)
MacDonald, J. E. 1990. X-Ray scattering from semiconductor interfaces. Faraday Discussions of the Chemical Society 89, pp. 191-200. (10.1039/dc9908900191)
Prince, K. C. et al. 1990. Structure of surfaces and interfaces as studied using synchrotron radiation - general discussion. Faraday Discussions of the Chemical Society 89, pp. 329-340. (10.1039/dc9908900329)

1989

Pluis, B. et al. 1989. X-ray reflectivity study of surface-initiated melting: Density profile at the pb(110) surface. Surface Science 222(2-3), pp. L845-L852. (10.1016/0039-6028(89)90354-3)
Conway, K. M., MacDonald, J. E., Norris, C., Vlieg, E. and van der Veen, J. F. 1989. The structure of the surface determined using X-ray diffraction. Surface Science 215(3), pp. 555-565. (10.1016/0039-6028(89)90275-6)
Vlieg, E., Van Der Veen, J. F., Gurman, S. J., Norris, C. and MacDonald, J. E. 1989. X-ray diffraction from rough, relaxed and reconstructed surfaces. Surface Science 210(3), pp. 301-321. (10.1016/0039-6028(89)90598-0)
Vlieg, E., Van Der Gon, A. W. D., Van Der Veen, J. F., MacDonald, J. E. and Norris, C. 1989. The structure of Si(111)-()R30°-Ag determined by surface X-ray diffraction. Surface Science 209(1-2), pp. 100-114. (10.1016/0039-6028(89)90061-7)
Clausen, K. N. et al. 1989. Coherent diffuse neutron scattering from UO2 and ThO2 at temperatures above 2000 K. Physica B: Condensed matter 156-57, pp. 103-565. (10.1016/0921-4526(89)90600-5)
Williams, A. A., MacDonald, J. E., van Silfhout, R. G., van der Veen, J. F., Johnson, A. D. and NorriS, C. 1989. The initial stages of growth of Ge on Si(001) studied by X-ray diffraction. Journal of Physics: Condensed Matter 1(Supp B), pp. SB273-SB274. (10.1088/0953-8984/1/SB/073)
van Silfhoutl, R. G. et al. 1989. X-ray intensity oscillations occurring during growth of Ge on Ge(111)-a comparison with RHEED. Journal of Physics: Condensed Matter 1(Supp B), pp. SB213-SB214. (10.1088/0953-8984/1/SB/047)
van Silfhout, R. G. et al. 1989. In situ x-ray scattering studies of the deposition of Ge atoms on Ge (111). Journal de Physique Colloques 50(C7), pp. 295-300. (10.1051/jphyscol:1989731)
Johnson, A. D., Norris, C., Derbyshire, H. S., MacDonald, J. E., Vlieg, E. and van der Veen, J. F. 1989. X-ray scattering from a vicinal Ge(001) surface. Journal of Physics: Condensed Matter 1(Supp B), pp. SB275-SB277. (10.1088/0953-8984/1/SB/074)
Gay, J. M. et al. 1989. X-ray reflectivity study of surface melting on Pb (110). Journal de Physique Colloques 50(C7), pp. 289-293. (10.1051/jphyscol:1989730)
Barnett, S. J., Golding, T. D., MacDonald, J. E., Conway, K. M., Whitehouse, C. R. and Dinan, J. E. 1989. Double crystal x-ray-diffraction characterization of InSb/CdTe superlattice structures. Institute of Physics: Conference Series 100, pp. 485 -490.

1988

Vlieg, E., van der Gon, A., van der Veen, J., MacDonald, J. E. and Norris, C. 1988. Surface X-Ray scattering during crystal growth: Ge on Ge(111). Physical Review Letters 61(19), pp. 2241-2244. (10.1103/PhysRevLett.61.2241)
MacDonald, J. E., Saunders, G. A. and Clausen, K. N. 1988. The transition from zero- to first-sound phonon propagation in lead at high temperatures. Journal of Physics C: Solid State Physics 21(1), article number: L1. (10.1088/0022-3719/21/1/001)
MacDonald, J. E., Norris, C., Vlieg, E., van der Gon, A. D. and van der Veen, J. F. 1988. Epitaxial Growth Studied by Surface X-Ray Diffraction. Presented at: 2nd International Conference on the Structure of Surfaces (ICSOS II), Amsterdam, The Netherlands, 22–25 June 1987 Presented at van der Veen, J. F. and Van Hove, M. A. eds.Epitaxial Growth Studied by Surface X-Ray Diffraction:The Structure of Surfaces II. Springer Series in Surface Sciences Vol. 11. Berlin, Germany: Springer Berlin Heidelberg pp. 438-442., (10.1007/978-3-642-73343-7_72)

1987

Comins, J. D., MacDonald, J. E., Lambson, E. F., Saunders, G. A., Rowsell, A. J. and Bridge, B. 1987. The elastic bahaviour and vibrational anharmonicity of molybdenum phosphate glasses. Journal of Materials Science 22(6), pp. 2113-2118. (10.1007/BF01132947)
Comins, J. D., MacDonald, J. E., Gibbs, M. R. J. and Saunders, G. A. 1987. A search for relaxation in a bulk Pd40Ni40P20metallic glass. Journal of Physics F: Metal Physics 17(1), pp. 19-28. (10.1088/0305-4608/17/1/008)
Clausen, K., Hayes, W., MacDonald, J. E., Osborn, R., Schnabel, P. G., Hutchings, M. T. and Magerl, A. 1987. Inelastic neutron scattering investigation of the lattice dynamics of ThO2 and CeO2. Journal of the Chemical Society, Faraday Transactions 2 83(7), pp. 1109-1112. (10.1039/f29878301109)
Vlieg, E., Van der Veen, J. F., MacDonald, J. E. and Miller, M. 1987. Angle calculations for a five-circle diffractometer used for surface X-ray diffraction. Journal of Applied Crystallography 20(5), pp. 330-337. (10.1107/S0021889887086527)

1986

Andersen, N. H., Clausen, K., Hackett, M. A., Hayes, W., Hutchings, M. T., MacDonald, J. E. and Osborn, R. 1986. The defect structure of yttria-stabilized zirconia, studied by quasielastic diffuse neutron scattering. Physica B+C 136(1-3), pp. 315-317. (10.1016/S0378-4363(86)80081-X)
Saunders, G. A., Yogurtcu, Y. K., Macdonald, J. E. and Pawley, G. S. 1986. The elastic behaviour of orthorhombic sulphur under pressure. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 407(1833), pp. 325-342. (10.1098/rspa.1986.0100)
Saunders, G., Comins, J., MacDonald, J. E. and Saunders, E. 1986. Thermodynamics of a ferroelastic phase transition. Physical Review B 34(3), pp. 2064-2066. (10.1103/PhysRevB.34.2064)
Salleh, M. D., MacDonald, J. E., Saunders, G. A. and Plessis, P. D. V. 1986. Hydrostatic pressure dependences of elastic constants and vibrational anharmonicity of uranium nitride. Journal of Materials Science 21(7), pp. 2577-2580. (10.1007/BF01114310)
Lambson, E., Lambson, W., MacDonald, J. E., Gibbs, M., Saunders, G. and Turnbull, D. 1986. Elastic behavior and vibrational anharmonicity of a bulk Pd40Ni40}P20 metallic glass. Physical Review B 33(4), pp. 2380-2385. (10.1103/PhysRevB.33.2380)
Osborn, R., Andersen, N., Clausen, K. N., Hackett, M., Hayes, W., Hutchings, M. and MacDonald, J. E. 1986. Neutron scattering investigation of the defect structure of Y2O3 - stabilised ZrO2 and its dynamical behaviour at high temperatures. Presented at: Kinetics and Mass Transport in Silicate and Oxide Systems, London, UK, September 1984 Presented at Freer, R. and Dennis, P. F. eds.Kinetics and Mass Transport in Silicate and Oxide Systems: Proceedings of an International Symposium, London, 1984 (Materials Science Forum). Material science forum Vol. 7. London, UK: Trans Tech Publications pp. 55-62.
Hackett, M. A., Andersen, N. H., Clausen, K., Hayes, W., Hutchings, M. T. and MacDonald, J. E. 1986. Coherent diffuse neutron scattering study of vacancy correlations in yttria-stabilised zirconia. In: Chadwick, A. V. and Terenzi, M. eds. Defects in Solids: Modern Techniques (Nato Science Series B:). NATO ASI Series:B: Physics US: Springer, pp. 435.

1985

Macdonald, J. E., Saunders, G. A., Omar, M. S. and Pamplin, B. R. 1985. Comparison of the elastic behaviour of CuGe4P3 with that of CuGe2P3. physica status solidi (a) 89(2), pp. K137-K141. (10.1002/pssa.2210890241)
MacDonald, J. E., Saunders, G. A., Yoḡurtçu, Y. K. and Hönle, W. 1985. Elastic behaviour under pressure of the cluster compound (Ag6Ge4P12)Ge6. Journal of Physics and Chemistry of Solids 46(8), pp. 951-956. (10.1016/0022-3697(85)90098-8)
Hutchings, M. T., Clausen, K., Hayes, W., Macdonald, J. E., Osborn, R. and Schnabel, P. 1985. Oxygen Frenkel Disorder in UO2 and THO2 observed above 2000-k using neutron-scattering techniques. High Temperature Science 20(1), pp. 97-108.
Clausen, K., Hayes, W., Hutchings, M. T., Kjems, J. K., Macdonald, J. E. and Osborn, R. 1985. Lattice-dynamics and elastic-constants of uranium-dioxide at high-temperatures investigated by neutron-scattering. High Temperature Science 19(2), pp. 189-196.
MacDonald, J. E. et al. 1985. Thermally induced frenkel disorder in UO//2 and ThO//2. High Temperatures - High Pressures 17(1), pp. 27-29.
Andersen, N. A., Clausen, K. N., Hackett, M. A., Hayes, W., Hutchings, M. T., MacDonald, J. E. and Osborn, R. 1985. Coherent neutron scattering investigation of the defect structure of yttria-stabilised zirconia. Presented at: Transport-structure relations in fast ion and mixed conductors : 6th Risø International Symposium on Metallurgy and Materials Science, Risø, Denmark, 9-13 September 1985Transport-structure relations in fast ion and mixed conductors : proceedings of the 6th Risø International Symposium on Metallurgy and Materials Science, 9-13 September 1985. Roskilde, Denmark: Risø National Laboratory pp. 279-284.

1984

Clausen, K., Hayes, W., Macdonald, J. E., Osborn, R. and Hutchings, M. 1984. Observation of oxygen Frenkel disorder in uranium dioxide above 2000 K by use of neutron-scattering techniques. Physical Review Letters 52(14), pp. 1238-1241. (10.1103/PhysRevLett.52.1238)
Clausen, K., Hayes, W., Hutchings, M., Macdonald, J. E., Osborn, R. and Schnabel, P. 1984. Investigation of oxygen disorder, thermal parameters, lattice vibrations and elastic constants of UO2 and ThO2 at temperatures up to 2 930 K. Revue de Physique Appliquée 19(9), pp. 719-722. (10.1051/rphysap:01984001909071900)

1983

Clausen, K., Hayes, W., MacDonald, J. E., Schnabel, P., Hutchings, M. T. and Kjems, J. K. 1983. Neutron scattering investigation of disorder in UO 2 and ThO 2 at high temperatures. High Temperatures. High Pressures 15(4), pp. 383-390.

Diddordebau ymchwil

Mae fy niddordebau ymchwil cyfredol yn cynnwys agweddau electronig a strwythurol ar gynnal systemau moleciwlaidd. Rydym yn defnyddio technegau sganio chwiliedydd i ymchwilio dargludiad trydanol mewn moleciwlau sengl. Yn benodol, mae cydweithrediad agos â Martin Elliott (Ffiseg a Seryddiaeth) a Dafydd D Jones (Ysgol y Biowyddorau) wedi arloesi mesuriadau dargludiad trwy foleciwlau protein sengl sydd wedi'u bondio'n gemegol ag arwyneb a blaen metal. Defnyddir diffreithiant achosion pori synchrotron hefyd i archwilio strwythur ffilmiau cynnal organig, yn enwedig cyfuniadau polymer-llawneren ar gyfer celloedd ffotofoltäig organig.

Arolygiaeth

Ar hyn o bryd, rwy'n drefnydd modiwl ar gyfer:
PX2231 Ffiseg Thermol ac Ystadegol (modiwl dwbl)
PX4119 Moleciwlau Mawr a Bywyd
Rwy'n cynnal sesiynau tiwtorial blwyddyn gyntaf ac ail flwyddyn bob wythnos.

Rwyf hefyd yn goruchwylio nifer o fyfyrwyr prosiect 3ydd a 4edd flwyddyn yn cymryd:
PX3315 - Prosiect Ffiseg
PX4310 - Prosiect

Mae'r modiwlau a addysgir yn ddiweddar yn cynnwys:
PX2221 Ffiseg Cymhwysol
PX2223 Ffiseg Solidau a Mater Meddal
PX3109 Ffiseg Wladwriaeth Solid

Addysg a Chymwysterau

1984: DPhil (Ffiseg), Prifysgol Rhydychen
1980: B.Sc. Ffiseg, Prifysgol Caerdydd (Coleg Prifysgol Caerdydd ar y pryd)

Trosolwg Gyrfa

2015 - presennol: Athro ym Mhrifysgol Caerdydd
2004-2015: Darllenydd ym Mhrifysgol Caerdydd
1988-2004: Darlithydd ac Uwch Ddarlithydd ym Mhrifysgol Caerdydd
1986-1988: Cymrawd Ymchwil Ôl-ddoethurol ym Mhrifysgol Cymru Caerdydd
1984-1986: Cymrawd Ymchwil Ôl-ddoethurol ym Mhrifysgol Caerfaddon

Aelodaethau proffesiynol

Aelod o'r Sefydliad Ffiseg

External profiles

ORCID