TEM@BNL: 2009

Tuesday, December 1, 2009

2009

1. Bian, W.M., Zhu, Y., and Zhou, L., “Determination of space group of incommensurate modulation structure phase in Bi high temperature superconductors”, Acta Metallurgica Sinica, 45, 673-679 (2009).

2. Han, W-Q., Su, D., Wu, L., Aoki, T., and Zhu, Y., “Tri- and quadri-metallic ultrathin nanowires synthesized by one-step phase-transfer approach”, Nanotechnology 20, 495605 (2009).

3. He, J., Gueguen, A., Sootsman, J.R., Zheng, J.-C., Wu, L., Zhu, Y., Kanatzidis, M.G., and Dravid, V.P., “Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb18-xSnxBiTe20 Thermoelectric Materials”, J. AM. CHEM. SOC., 131, 17828–17835, (2009).

4. He, J., Volkov, V.V., Beleggia, M., Asaka, T., Tao, J., and Zhu, Y., ”Measurement of ferromagnetic domain structures and spin configurations in doped manganite”, Phys. Rev. B in press (2009).

5. Huang, L., Schofield, M.A., and Zhu, Y., “Direct observation of the controlled magnetization reversal processes in Py/Al/Py asymmetric ring stacks”, Appl. Phys., Lett., 95, 042501, (2009).

6. Huang, L., and Zhu, Y., “Controlled reversal of coupled Néel walls in flux-closure magnetic trilayer elements”, Appl. Phys., Lett., 95, 222502 (2009).

7. Inada, H.; Wu, L.; Wall, J.; Su, D.; Zhu, Y., “Performance and Image Analysis of the Aberration Corrected Hitachi HD-2700C STEM”, J. Electron Microscopy, 58 111 – 122 (2009).

8. Ke, X., Chen, C., Yang, J., Wu, L., Zhou, J., Li, Q., Zhu, Y., and Kent., P.R.C., “ Microstructure and a Nucleation Mechanism for Nanoprecipitates in PbTe-AgSbTe₂”, Phys. Rev. Lett., 103, 145502 (2009).

9. Lim, B.; Jiang, M.; Camargo, P.H.C.; Cho, E.C.; Tao, J.; Lu, X.; Zhu, Y.; Xia, Y., “Pd-Pt Bimetallic Nanodendrites with High Activity for Oxygen Reduction,” Science, 324, 1302 – 1305, (2009).

10. Lim, B., Jiang, M., Tao, J., Camargo, P.H.C., Zhu, Y., and Xia, Y., “Shape-controlled synthesis of Pd nanocrystals in aqueous solutions”, Advanced Functional Materials (feature article) 19, 189–200 , (2009).

11. Luo, W.; Varela, M.; Tao, J.; Pennycook, S.J.; Pantelides, S.T., “Electronic and Crystal-field Effects in the Fine Structure of Electron Energy-Loss Spectra of Manganites”, Phys. Rev. B, 79, 052405, (2009).

12. Meng, Q.P.; Welch, D.O.; Zhu, Y., “Strain-Induced Changes of Oxygen Ordering in YBa2Cu3O6+δ Cuprates”, Phys. Rev. B, 79, 134531 (2009).

13. McQueen, T. M., Williams, A. J., Stephens, P.W., Tao, J., Zhu, Y., Ksenofontov, V., Casper, F., Felser, C., and Cava, R. J., "Tetragonal-to-Orthorhombic Structural Phase Transition at 90Kin the Superconductor Fe1:01Se", Phys. Rev. Lett. 103, 057002 (2009).

14. Tao, J., Niebieskikwiat, D., Varela, V., Luo, W., Schofield, M.A., Zhu, Y., Salamon, M.B., Zuo, J.M., Pantelides, S.T., and Pennycook, S.J., "Direct imaging of nanoscale phase separation in La_0.55Ca_0.45MnO₃: relationship to colossal magnetoresistance", Phys. Rev. Lett., 103 097202 (2009), highlighted in Physics Today, Nov. issue, p20-23).

15. Upton, M.H., Klie, R.F., Hill, J.P., Gog, T., Casa, D., Kuc, W., Zhu, Y., Sfeir, M.Y. , Misewich, J., Erese, G., and Lowndes, D., “Effect of number of walls on plasmon behavior in carbon nanotubes”, CARBON, 47 162-168 (2009).

16. Vaz , C.A.F. , Wanga, H.-Q., Ahn, C.H., Henrich, V.E., Baykara, M.Z., Schwendemann, T.C., Pilet N., Albers, B.J., Schwarz, U.D., Zhang, L.H., Zhu, Y., Wangd, J., Altman, E.I., “ Interface and electronic characterization of thin epitaxial Co3O4 films”, Surface Science 603 291–297 (2009).

17. Wang, J., Inada, H., Wu, L., Zhu, Y., Choi, Y., Liu, P., Zhou, W., and Adzic, R.R., “Oxygen Reduction on Well-Defined Core-Shell Nanocatalysts: Particle Size, Facet, and Pt Shell Thickness Effects”, J. AM. CHEM. SOC, 131 17298-17302 (2009).

18. Wu, L., Zheng, J.C., Zhou, J., Li, Q., Yang, J.H., and Zhu, Y., “Nanostructures and defects in thermoelectric AgPb18SbTe20 single crystal”, J. Appl. Phys. 105, 094317 (2009).

19. Xu, F., Volkov, V.V., Zhu, Y., Bai, H., Rea, A., Valappil, N.V., Gao, X., Kuskovsky, I.L., and Matsui, H., “Long Electron-Hole Separation of ZnO-CdS Core-Shell Quantum Dots”, J. Phys. Chem. C, 113 19419-19423, (2009).

20. Xue, K., Chen, S., Wang,L., Wei, R., Xu,S., Cui, L., Mao, B., Tian, Z., Zen, C., Sun, S., Wu, L., and Zhu,Y., “Fabrication and characterization of oriented carbon atom wires assembled on gold”, Chemical Physics Lett., 469, 284-288 (2009).

21. Zheng, J.-C. Wu, L., and Zhu, Y., “Aspherical electron scattering factors and their parameterizations for elements from H to Xe”, J. of Appl. Crystallography, 42 1043-1053 (2009).

22. Zhong, H.; Huang, L.; Wei, D.; Wang, S.; Zhu, Y. and Yuan, J., “Experimental Determination of Ultra-Sharp Stray Field Distribution from a Magnetic Vortex Core Structure, “ J. Mag. Mag. Mat., 321 L37 - L40, (2009).

23. Zhu, Y., Inada, H., Wu, L., Wall, J., and Su, D., “The aberration-corrected Hitachi HD-2700C STEM at Brookhaven National Laboratory”, Hitachi E.M. News 3 2-13 (2009).

24. Zhu, Y., and Jarausch, K., “Advanced Electron Microscopy in Materials Physics,” J. Electron Microscopy, 58, 73 – 75 (2009).

25. Zhu, Y., Inada, H., Nakamura, K., and Wall, J., “Imaging single atoms using secondary electrons with an aberration-corrected electron microscope”, Nature Materials, 8 808-812 (2009).

Sunday, November 1, 2009

Nanoscale phase competition accompanies colossal magnetoresistance

The CMR effect itself arises when the paramagnetic insulating phase yields to the ferromagnetic metallic phase. Now, Jing Tao of Brookhaven National Laboratory and her collaborators have found evidence that a charge-ordered, possibly antiferromagnetic phase plays a role too. Tao derived her results using a new technique, scanning electron nanodiffraction (SEND). The technique combines electron diffraction's ability to reveal the presence of ordered structures with scanning microscopy's ability to reveal those structures' real-space distribution.

http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PHTOAD000062000011000020000001&idtype=cvips&gifs=yes

Sunday, September 20, 2009

Simultaneous Nanoscale Imaging of Surface and Bulk Atoms

UPTON, NY — Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory, in collaboration with researchers from Hitachi High Technologies Corp., have demonstrated a new scanning electron microscope capable of selectively imaging single atoms on the top surface of a specimen while a second, simultaneous imaging signal shows atoms throughout the sample’s depth. This new tool, located at Brookhaven Lab’s Center for Functional Nanomaterials (CFN), will greatly expand scientists’ ability to understand and ultimately control chemical reactions, such as those of catalysts in energy-conversion devices...

http://www.bnl.gov/cfn/news/PRdisplay.asp?prID=1008

Wednesday, June 24, 2009

Brookhaven Lab Scientist Yimei Zhu Elected Inaugural Fellow of the Microscopy Society of America

UPTON, NY — Yimei Zhu, a scientist at the U.S. Department of Energy’s Brookhaven National Laboratory, has been elected the inaugural Fellow of the Microscopy Society of America, an affiliate of the American Institute of Physics and the American Association for the Advancement of Science. Limited to a small fraction of members, the designation of Fellow recognizes senior distinguished members of the society who have made significant contributions to the advancement of the science and practice of microscopy....

http://www.bnl.gov/bnlweb/pubaf/pr/PR_display.asp?prID=981

Thursday, May 14, 2009

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

Sunday, March 1, 2009

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