New Catalyst Could Boost Cleaner Fuel Use

Washington University has released the following news release on research done in collaboration with Brookhaven physicists Jing Tao and Yimei Zhu.

Material scientists at Washington University in St. Louis have developed a technique for a bimetallic fuel cell catalyst that is efficient, robust and two-to-five times more effective than commercial catalysts. The novel technique eventually will enable a cost effective fuel cell technology, which has been waiting in the wings for decades and should give a boost for cleaner use of fuels worldwide.

http://www.bnl.gov/bnlweb/pubaf/pr/PR_display.asp?prID=961

Visiting Scientists

Visiting Scientists

   Professor Johan Tafto
   Department of Physics
   University of Oslo
   Norway

 Professor Raymond Egerton
 Department of Physics
 University of Alberta
 Canada









     Professor Nigel  Shepherd
     Department of Materials Science and Engineering
     University of Northern Texas

Past Group Members

Past group members

Javier F. Pulecio

Marvin Schofield

Dong Su E-mail: dsu@bnl.gov

Lihua Zhang E-mail:   lhzhang@bnl.gov

Jim Ciston

Eli Sutter E-mail: esutter@bnl.gov

Kim Kisslinger     E-mail: kisslinger@bnl.gov

Haibing Su E-mail: HBSU@ntu.edu.sg

Robert Klie

Jiaqing He

Tobi Beetz

J. C. Zheng

Craig Johnson

Mirko Milas

Marek Malac

Lei Huang

Javier F. Pulecio

 http://jfpulecio.blogspot.com/

• Vyacheslav V. Volkov

• Binghui Ge

Feng Wang

Hefei Hu

• Shawn Pollard
•  https://sites.google.com/site/shawnpollardtem

2008

1.     Carrasquilla-Alvarez, J., Castaneda, R., Garcia-Sucerquia, J., Schofield, M.A., Beleggia, M., Zhu, Y., and Matteucci, G., “Retrieving the complex degree of coherence of electron beams”, Optik 119 127–133 (2008).

2.     Chen, H., Wang, G., Dudley, M., Zhang, L., Wu, L., Zhu, Y., Xu, Z., Edgar, J.H., and Kuball, M., “Defect structures in B12As2 epitaxial layers grown on (0001) 6H-SiC”, J. Appl. Phys. 103, 123508 (2008).

3.     Chen, H., Wang, G., Dudley, M., Xu, Z., Edgar, J.H., Batten, T., Kuball, M., Zhang, L., and Zhu, Y.,  “Single-crystalline B12As2 on m-plane (1100) 15R-SiC”, Appl. Phys. Lett. 92, 231917 (2008).

4.     Cumings, J., Olsson, E., Petford-Long, A.K., and Zhu, Y., “Electric and Magnetic Phenomena Studied by In-Situ Transmission Electron Microscopy”, MRS Bulletin, 33 101-106 (2008).

5.     Han, W-Q., Wu, L., Zhu, Y., Watanabe, K.,  and Taniguchi, T., “Structure of chemically derived mono- and few-atomic-layer boron nitride sheets”, Appl. Phys. Lett., 93, 223103 (2008).

6.     He, J., Zheng, J.C., Chaudhuri, S., Budhani, R.C., and Zhu, Y., "Self-organization  of epitaxial  La_0.35Pr_0.275Ca_0.375MnO₃ manganite nanorods on NdGaO3 substrates",  J. Appl. Phys, 103, 064304 (2008).

7.     Johnson, C.L., Bording, K., and Zhu, Y., “Structural inhomogeneity and twinning in YBa₂Cu₃O_7-δ superconductors: High-resolution transmission electron microscopy measurements”, Phys. Rev. B, 71 (2008), highlighted as an Editor’s suggestion.

8.     Jooss, Ch., Hoffmann, J.,  Fladerer, J., Ehrhardt, M., Beetz, T., Wu, L., and Zhu, Y., “Electric pulse induced resistance change effect in manganites due to polaron localization at the metal-oxide interfacial region”, Phys. Rev. B 77, 13 132409 (2008).

9.     Klie, R.F., Johnson, C., and Zhu, Y., “Atomic-resolution STEM in the aberration-corrected JEOL JEM2200FS”, invited article, Microscopy & Microanalysis, 14, 104-112 (2008).

10.  Klie, R.F., Zhao, Y., Yang, G., and Zhu, Y., “High-resolution Z-contrast imaging and EELS study of functional oxide materials”, Micron, 39 723–733  (2008).

11.  Li, Z., Tao, J., Lu, X., Zhu, Y., and Xia, Y., “Facile synthesis of ultrathin Au nanorods by aging the AuCl(oleylamine) complex with amorphous Fe nanoparticles in chloroform”, Nano Lett. 8, 3052- 3059 (2008).

12.  Malac, M., Beleggia, M., Egerton, R.F., and Zhu, Y., “Imaging of radiation-sensitive samples in transmission electron microscopes equipped with Zernike phase plates”, Ultramicroscopy, 108, 126-140 (2008).  

13.  Malec, M.; Beleggia, M.; Taniguchi, Y.; Egerton, R.; Zhu, Y., “Low-Dose Performance of Parallel-beam Nanodiffraction”, Ultramicroscopy, 109, 14 – 21, (2008).

14.  Mandal, S., Budhani, R.C., He, J., and Zhu, Y., “Diverging giant magnetoresistance in ferromagnet-superconductor-ferromagnet trilayers”, Phys. Rev. B 78, 094502 (2008).

15.  Phatak, C., Beleggia, M., and De Graef, M., “Vector Field Electron Tomography of Materials: Theoretical Development”, Ultramicroscopy 108 503-513 (2008).

16.  Tan, Z.; Patel, V.; Liu, X.; Lukens, J.E.; Likharev, K.K.; Zhu, Y., “Aluminum-Oxide Tunnel Barriers with High Field Endurance”, Appl. Phys. Lett., 93, 242109, (2008).

17.  Schofield, M.A., Beleggia, M., Zhu, Y., and Pozzi, G., “Characterization of JEOL 2100F Lorentz-TEM for low-magnification electron holography and magnetic imaging”, Ultramicroscopy, 108  625–634 (2008).

18.  Solovyov, V.F., Li, Q., Wiesmann, H.,Oleynikov, P., and Zhu, Y., “Strong influence of the YBa2Cu3O7 grain size on critical current densities of thick YBa2Cu3O7 layers made by a metal–organic deposition process”, Supercond. Sci. Technol. 21 125013 (2008).

19.  Villegas, J.E., Smith, K.D., Huang, L., Zhu, Y., Morales, R., and Schuller, I.K., “ Switchable collective pinning of flux quanta using magnetic vortex arrays: Experiments on square arrays of Co dots on thin superconducting films”, Phys. Rev. B  77, 134510 (2008)

20.  Volkov, V.V., Wall, J., and Zhu, Y., “Position-sensitive diffractive imaging in STEM by an automated chaining diffraction algorithm”, Ultramicroscopy 108 741–749 (2008).

21.  Wagner, K.E., Morosan, E., Hor, Y.S., Tao, J., Zhu, Y., Sanders, T., McQueen, T.M., Zandbergen, H.W., Williams, A.J., West, D.V., and Cava, R.J., “Tuning the charge density wave and superconductivity in CuxTaS2”, Phys. Rev. B 78, 104520 (2008).

22.  Zhu, Y., and Wall, J., “Aberration-corrected electron microscopes at Brookhaven National Laboratory”, Book chapter in Aberration-corrected Electron Microscopy, A thematic volume of Advances in Imaging & Electron Physics, Ed., P.W.Hawkes, Elsevier/Academic Press, p.481-523 (2008).

2007

1 M. Beleggia, M. A. Schofield, Y. Zhu et al., "Quantitative domain wall width measurement with coherent electrons," J. Magn. Magn. Mater. 310 (2), 2696-2698 (2007).

2 J. Carrasquilla-Alvarez, R. Castaneda, J. Garcia-Sucerquia et al., "Retrieving the complex degree of coherence of electron beams," Optik dx.doi.org/10.1016/j.ijleo.2006.07.007 (2007).

3 S. Chaudhuri, R. C. Budhani, He Jiaqing et al., "Scaled frequency-dependent transport in the mesoscopically phase-separated colossal magnetoresistive manganite La[sub 0.625 - y]Pr[sub y]Ca[sub 0.375]MnO[sub 3]," Physical Review B (Condensed Matter and Materials Physics) 76 (13), 132402 (2007).

4 G. Deptuch, A. Besson, P. Rehak et al., "Direct electron imaging in electron microscopy with monolithic active pixel sensors," Ultramicroscopy 107 (8), 674-684 (2007).

5 Y. Ding and He J, "Domain structures and superdislocations of La0.7Ca0.3MnO3 thin films grown on SrTiO3 substrates," J. Crystal Growth 306, 437 (2007).

6 W. Q. Han, L. J. Wu, R. F. Klie et al., "Enhanced optical absorption induced by dense nanocavities inside titania nanorods," Adv. Mater. 19 (18), 2525-+ (2007).

7 J. Q. He, R. F. Klie, G. Logvenov et al., "Microstructure and possible strain relaxation mechanisms of La2CuO4+d thin films grown on LaSrAlO4 and SrTiO3 substrates," J. Appl. Phys. 101 (7), 6 (2007).

8 C. Jooss, L. Wu, T. Beetz et al., "Polaron melting and ordering as key mechanisms for colossal resistance effects in manganites," Proc. Natl. Acad. Sci. U. S. A. 104 (34), 13597-13602 (2007).

9 R. F. Klie, J. C. Zheng, Y. Zhu et al., "Direct measurement of the low-temperature spin-state transition in LaCoO3," Phys. Rev. Lett. 99 (4), 4 (2007).

10 J. W. Lau, M. Beleggia, and Y. Zhu, "Common reversal mechanisms and correlation between transient domain states and field sweep rate in patterned Permalloy structures," J. Appl. Phys. 102 (4), 6 (2007).

11 J. W. Lau, R. D. McMichael, M. A. Schofield et al., "Correlation of edge roughness to nucleation field and nucleation field distribution in patterned Permalloy elements," J. Appl. Phys. 102 (2), 4 (2007).

12 J. W. Lau, M. A. Schofield, and Y. Zhu, "A straightforward specimen holder modification for remnant magnetic-field measurement in TEM," Ultramicroscopy 107 (4-5), 396-400 (2007).

13 M. Malac, M. Beleggia, R. Egerton et al., "Bright-field TEM imaging of single molecules: Dream or near future?," Ultramicroscopy 107 (1), 40-49 (2007).

14 Q. P. Meng and Y. M. Zhu, "Structural modification of twin boundaries in YBa2Cu3O6+d oxides: Effects of oxygen concentration and temperature," Phys. Rev. B 75 (17), 7 (2007).

15 P. Moschkau, S. Schramm, J. Hoffmann et al., "Electronic Phase Separation and the CMR Effect in Pr1-xCaxMnO3 Films on (001) vicinal SrTiO3 Substrates," Mater. Sci. & Eng. B 144, 78-82 (2007).

16 C. Phatak, M. Beleggia, and M. De Graef, "Vector Field Electron Tomography of Materials: Theoretical Development," Ultramicroscopy dx.doi.org/10.1016/j.ultramic.2007.08.002 (2007).

17 M. A. Schofield, M. Beleggia, J. Lau et al., "Characterization of the JEM2100F-LM TEM for electron holography and magnetic imaging," JEOL News 42, 1-7 (2007).

18 M. A. Schofield, M. Beleggia, Zhu Y. et al., "Characterization of JEOL 2100F Lorentz-TEM for low-magnification electron holography and magnetic imaging," Ultramicroscopy (doi:10.1016/ j.ultramic. 2007.10.015) (2007).

19 V.F. Solovyov, H.J. Wiesmann, L. Wu et al., "High critical currents by isotropic magnetic-flux-pinning centres in a 3 μm-thick YBa2Cu3O7 superconducting coated conductor," Supercond. Sci. Tech. 20, L20-L23 (2007).

20 Y. Sun, L. H. Zhang, H. W. Zhou et al., "Seedless and templateless synthesis of rectangular palladium nanoparticles," Chem. Mat. 19 (8), 2065-2070 (2007).

21 G. Wang, Y. Ji, L. H. Zhang et al., "Synthesis of molybdenum oxide nanoplatelets during crystallization of the precursor gel from its hybrid nanocomposites," Chem. Mat. 19 (5), 979-981 (2007).

22 A. Willis, Z. Chen, J. Q He et al., "Metal Acetylacetonates as General Precursors for the Synthesis of Early Transition Metal Oxide Nanomaterials," Journal of Nanomaterials 2007 (14858) (2007).

23 L. Wu, R. F. Klie, Y. Zhu et al., "Experimental confirmation of Zener-polaron-type charge and orbital ordering in Pr1-xCaxMnO3," Phys. Rev. B 76 (17), 13 (2007).

24 L. Wu, J. C. Zheng, and Zhu Y, "A novel electron diffraction technique to accurately measure valence electron distribution and interfacial lattice displacement," Journal of Chinese Electron Microscopy Society 26, 513-519 (2007).

25 Y. Zhu, J. C. Zheng, L. Wu et al., "Nanoscale disorder in CaCu3Ti4O12: A new route to the enhanced dielectric response," Phys. Rev. Lett. 99 (3), 4 (2007).