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Staff information

Tim Droubay

Materials Sciences
Scientist
Pacific Northwest National Laboratory
PO Box 999
MSIN: K8-87
Richland, WA 99352

PNNL Publications

2009

  • Droubay T, TC Kaspar, BP Kaspar, and SA Chambers. 2009. "Cation dopant distributions in nanostructures of transition-metal doped ZnO:Monte Carlo simulations." Physical Review. B, Condensed Matter and Materials Physics 79(7):Art. No. 075324. 
  • Heald SM, TC Kaspar, T Droubay, V Shutthanandan, SA Chambers, A Mokhtari, AJ Behan, HJ Blythe, JR Neal, M Fox, and G Gehring. 2009. "X-ray absorption fine structure and magnetization characterization of the metallic Co component in Co-doped ZnO thin films ." Physical Review. B, Condensed Matter 79(7):Art. No. 075202. 
  • Lower BH, R Yongsunthon, L Shi, L Wildling, HJ Gruber, NS Wigginton, CL Reardon, GE Pinchuk, T Droubay, JF Boily, and SK Lower. 2009. "Antibody recognition force microscopy shows that outer membrane cytochromes OmcA and MtrC are expressed on the exterior surface of Shewanella oneidensis MR-1." Applied and Environmental Microbiology 75(9):2931-2935. 

2008

  • Kaspar TC, T Droubay, SM Heald, MH Engelhard, P Nachimuthu, and SA Chambers. 2008. "Hidden Ferromagnetic Secondary Phases in Cobalt-doped ZnO Epitaxial Thin Films." Physical Review. B, Condensed Matter 77(20):201303.  doi:10.1103/PhysRevB.77.201303
  • Kaspar TC, T Droubay, SM Heald, P Nachimuthu, CM Wang, V Shutthanandan, CA Johnson, DR Gamelin, and SA Chambers. 2008. "Lack of ferromagnetism in n-type cobalt-doped ZnO epitaxial thin films." New Journal of Physics 10:Art. No. 055010.  doi:10.1088/1367-2630/10/5/055010
  • Eggleston CM, J Voros, L Shi, BH Lower, T Droubay, and PJ Colberg. 2008. "Binding and Direct Electrochemistry of OmcA, an Outer-Membrane Cytochrome from an Iron Reducing Bacterium, with Oxide Electrodes: A Candidate Biofuel Cell System." Inorganica Chimica Acta 361(3):769-777.  doi:10.1016/j.ica.2007.07.015
  • Li Y, TC Kaspar, T Droubay, AG Joly, P Nachimuthu, Z Zhu, V Shutthanandan, and SA Chambers. 2008. "A Study of H and D doped ZnO epitaxial films grown by pulsed laser deposition." Journal of Applied Physics 104(5):Article no. 053711.  doi:10.1063/1.2975219
  • Li Y, TC Kaspar, T Droubay, Z Zhu, V Shutthanandan, P Nachimuthu, and SA Chambers. 2008. "Electronic properties of H and D doped ZnO epitaxial films." Applied Physics Letters 92(15):Art. No. 152105. 

2007

  • Lower BH, L Shi, R Yongsunthon, T Droubay, DE Mccready, and SK Lower. 2007. "Specific Bonds between an Iron Oxide Surface and Outer Membrane Cytochromes MtrC and OmcA from Shewanella oneidensis MR-1." Journal of Bacteriology 189(13):4944-4952.  doi:10.1128/JB.01518-06
  • Shao R, CM Wang, DE McCready, T Droubay, and SA Chambers. 2007. "Growth and structure of MBE grown TiO2 anatase films with rutile nano-crystallites ." Surface Science 601(6):1582-1589.  doi:10.1016/j.susc.2007.01.039
  • Cai M, SC Langford, JT Dickinson, G Xiong, T Droubay, AG Joly, KM Beck, and WP Hess. 2007. "An In Situ Study of the Martensitic Transformation in Shape Memory Alloys Using Photoemission Electron Microscopy." Journal of Nuclear Materials 361(2-3):306-312.  doi:10.1016/j.jnucmat.2006.12.008
  • Cai M, SC Langford, MJ Wu, WM Huang, G Xiong, T Droubay, AG Joly, K Beck, WP Hess, and JT Dickinson. 2007. "Study of Martensitic Phase transformation in a NiTiCu Thin Film Shape Memory Alloy Using Photoelectron Emission Microscopy." Advanced Functional Materials 17(1):161-167.  doi:10.1002/adfm.200600611
  • Droubay T, KM Rosso, SM Heald, DE Mccready, CM Wang, and SA Chambers. 2007. "Structure, Magnetism and Conductivity in Epitaxial Ti-doped ?-Fe2O3 Hematite: Experiment and density functional theory calculations." Physical Review. B, Condensed Matter and Materials Physics 75(10):, doi:10.1103/PhysRevB.75.104412
  • Xiong G, R Shao, T Droubay, AG Joly, KM Beck, SA Chambers, and WP Hess. 2007. "Photoemission Electron Microscopy of TiO2 Anatase Films Embedded with Rutile Nanocrystals." Advanced Functional Materials 17(13):2133-2138.  doi:10.1002/adfm.200700146

2006

  • Kaspar TC, T Droubay, DE McCready, P Nachimuthu, SM Heald, CM Wang, AS Lea, V Shutthanandan, SA Chambers, and MF Toney. 2006. "Magnetic properties of epitaxial Co-doped anatase TiO2 thin films with excellent structural quality." Journal of Vacuum Science and Technology B--Microelectronics and Nanometer Structures 24(4):2012-2017.  doi:10.1116/1.2216723
  • Kaspar TC, T Droubay, V Shutthanandan, SM Heald, CM Wang, DE McCready, S Thevuthasan, JD Bryan, DR Gamelin, AJ Kellock, MF Toney, X Hong, C Ahn, and SA Chambers. 2006. "Ferromagnetism and structure of epitaxial Cr-doped anatase TiO2 thin films." Physical Review. B, Condensed Matter and Materials Physics 73(15):155327 (12 p.).  doi:10.1103/PhysRevB.73.155327
  • Chambers SA, T Droubay, CM Wang, KM Rosso, SM Heald, SA Schwartz, KR Kittilstved, and DR Gamelin. 2006. "Ferromagnetism in Oxide Semiconductors ." Materials Today 9(11):28-35. 
  • Shutthanandan V, S Thevuthasan, T Droubay, SM Heald, MH Engelhard, DE McCready, SA Chambers, P Nachimuthu, and BS Mun. 2006. "Synthesis of Room-Temperature Ferromagnetic Cr-doped TiO2(110) Rutile Single Crystals using Ion Implantation." Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 242(1-2):198-200.  doi:10.1016/j.nimb.2005.08.149
  • Shutthanandan V, S Thevuthasan, T Droubay, TC Kaspar, A Punnoose, J Hays, and SA Chambers. 2006. "Quantification of Dopant Concentrations in Diluted Magnetic Semiconductors using Ion Beam Techniques." Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 249(1-2):402-405.  doi:10.1016/j.nimb.2006.04.038

2005

  • Droubay T, SM Heald, V Shutthanandan, S Thevuthasan, SA Chambers, and J Osterwalder. 2005. "Cr-doped TiO2 Anatase- A Ferromagnetic Insulator ." Journal of Applied Physics 97:046103. 
  • Kaspar TC, T Droubay, CM Wang, SM Heald, AS Lea, and SA Chambers. 2005. "Co-doped Anatase TiO2 Heteroepitaxy on Si(001)." Journal of Applied Physics 97(7):073511-073511-10.  doi:10.1063/1.1868854
  • Kaspar TC, SM Heald, CM Wang, JD Bryan, T Droubay, V Shutthanandan, S Thevuthasan, DE McCready, AJ Kellock, DR Gamelin, and SA Chambers. 2005. "Negligible Magnetism in Excellent Structural Quality CrxTi1-xO2 Anatase: Contrast with High-Tc Ferromagnetism in Structurally Defective CrxTi1-xO2." Physical Review Letters 95:217203.  doi:10.1103/PhysRevLett.95.217203
  • Chambers SA, T Droubay, and TC Kaspar. 2005. "Epitaxial Growth and Properties of Magnetically Doped TiO2." Chapter 7 in Thin Films and Heterostructures for Oxide Electronics, ed. Satishchandra B. Ogale, pp. 219-247.  Springer, New York, NY. 
  • Heald SM, SA Chambers, and T Droubay. 2005. "XAFS study of CoxTi1-xO2-x-anatase." Physica Scripta T115:597-599.  doi:10.1238/Physica.Topical.115a00597
  • Heald SM, SA Chambers, and T Droubay. 2005. "XAFS Study of Epitaxial CoxTi1-xO2-x Anatase." In 12th International Conference on X-ray Absorption FIne Structure held in Malmo, Sweden, June, 2003, ed. N. Martensson, pp. 597-599.  Royal Swedish Academy of Sciences, Stockholm, Sweden. 
  • Osterwalder J, T Droubay, TC Kaspar, JR Williams, CM Wang, and SA Chambers. 2005. "Growth of Cr-doped TiO2 Films in the Rutile and Anatase Structures by Oxygen Plasma Assisted Molecular Beam Epitaxy ." Thin Solid Films 484(1-2):289-298. 
  • Sasahara A, T Droubay, SA Chambers, H Uetsuka, and H Onishi. 2005. "Topography of Anatase TiO2 Film Synthesized on LaAlO3(001) ." Nanotechnology 16(3):S18-S21. 
  • Wang CM, V Shutthanandan, S Thevuthasan, T Droubay, and SA Chambers. 2005. "Microstructure of Co-doped TiO2 (110) Rutile by Ion Implantation." Journal of Applied Physics 97(7):99-104. 

2004

  • Chambers SA, T Droubay, TC Kaspar, and MS Gutowski. 2004. "Accurate Valence Band Maximum Determination for SrTiO3(001) ." Surface Science 554(2-3):81-89. 
  • Chambers SA, T Droubay, TC Kaspar, and MS Gutowski. 2004. "Experimental Determination of Valence Band Maxima for SrTiO3, TiO2, and SrO and the Associated Valence Band Offsets with Si(001)." Journal of Vacuum Science and Technology B--Microelectronics and Nanometer Structures 22(4):2205-2215. 
  • Kim YJ, S Thevuthasan, T Droubay, AS Lea, CM Wang, V Shutthanandan, SA Chambers, R Sears, B Taylor, and B Sinkovic. 2004. "Growth and Properties of molecular beam epitaxially grown ferromagnetic Fe-doped TiO2 rutile films on TiO2." Applied Physics Letters 84(18):3531-3533. 
  • Shutthanandan V, S Thevuthasan, SM Heald, T Droubay, MH Engelhard, TC Kaspar, DE McCready, LV Saraf, SA Chambers, BS Mun, NM Hamdan, P Nachimuthu, B Taylor, R Sears, and B Sinkovic. 2004. "Room Temperature Ferromagnetism in Ion-implanted Co-doped TiO2(110) Rutile." Applied Physics Letters 84(22):4466-4468. 
  • Shutthanandan V, S Thevuthasan, SM Heald, T Droubay, MH Engelhard, TC Kaspar, DE McCready, LV Saraf, SA Chambers, BS Mun, NM Hamdan, P Nachimuthu, B Taylor, R Sears, and B Sinkovic. 2004. "Room-Temperature Ferromagnetism in Ion-Implanted Co-Doped TiO2(110) Rutile." Applied Physics Letters 84(22):4466-4468. 

2003

  • Chambers SA, T Droubay, CM Wang, AS Lea, RFC Farrow, L Folks, V Deline, and S Anders. 2003. "Clusters and Magnetism in Epitaxial Co-doped TiO2 Anatase." Applied Physics Letters 82(8):1257-1259. 
  • Chambers SA, SM Heald, and T Droubay. 2003. "Local Co Structure in Epitaxial Cox Ti1-xO2-x Anatase." Physical Review. B, Condensed Matter and Materials Physics 67(10):22-25, art. no. 100401. 
  • Tuan AC, TC Kaspar, T Droubay, JW Rogers, Jr, and SA Chambers. 2003. "Band Offsets for the Epitaxial TiO2/SrTiO3/Si(001) System." Applied Physics Letters 83(18):3734-3736. 

2002

  • Altman EI, T Droubay, and SA Chambers. 2002. "Growth of MoO3 films by oxygen plasma assisted molecular beam epitaxy." Thin Solid Films 414(2):205-215. 
  • Chambers SA, T Droubay, DR Jennison, and TK Mattsson. 2002. "Laminar Growth of Ultrathin Metal Films on Metal Oxides: Co on Hydroxylated alpha-Al2O3(0001)." Science 297(5582):827-831. 
  • Chambers SA, CM Wang, S Thevuthasan, T Droubay, DE McCready, AS Lea, V Shutthanandan, and CF Windisch, JR. 2002. "Epitaxial Growth and Properties of MBE Grown Ferromagnetic Co-doped TiO2 Anatase Films on SrTiO3(001) and LaAlO3(001)." Thin Solid Films 418(2):197-210. 

2001

  • Droubay T, and SA Chambers. 2001. "Surface Sensitive Fe 2p Photoemission Spectra for alpha-Fe2O3 (0001) - The Influence of Symmetry and Crystal-Field Strength." Physical Review. B, Condensed Matter 64(20):205414-205420. 
  • Chambers SA, and T Droubay. 2001. "The Role of Oxide Ionicity in Electronic Screening at Oxide/Metal Interfaces." Physical Review. B, Condensed Matter 64:075410-1 - 075410-6. 

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