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Kannan M. Krishnan
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Web: Krishnan Personal Website Web: Integrated Nanostructures & Mesoscale Engineering Group
M.S., Materials Science, State University of New York, Stony Brook, 1980. B. Tech., Mechanical Engineering, IIT Kanpur, India, 1978. Guggenheim Fellowship Award Prof. Krishnan is the recipient of a 2004 fellowship award from the John Simon Guggenheim Memorial Foundation. These prestigious awards are granted to men and women who have already demonstrated exceptional capacity for productive scholarship or exceptional creative ability in the arts and sciences. Prof. Krishnan's is using his award to pursue a research project titled "Magnetic Nanoparticles for Cancer Therapeutics". Research Summary The central theme in our research is the systematic exploration and design of fundamental materials properties/phenomena as a function of size and dimensionality. We focus on new materials structures, the correlation of materials behavior with the microstructure (as a function of processing) and their applications in emerging technologies. Our work encompasses both fundamental and applied dimensions and as such is funded by both federal agencies and private foundations. It is also multidisciplinary and builds on established methods in condensed matter physics, solid-state chemistry, metallurgy, ceramic science, electrical engineering and most recently, biology. We are an experimental group and in our work combine atomically-engineered synthesis advanced characterization of microstructures (using electron, photon, neutron and scanning probes) and measurements of magnetic, electrical and optical properties. Current projects include: Synthesis and functionalization of magnetic nanocrystals and core-shell structures, magnetically exchange-coupled heterostructures and devices, magnetic semiconducting oxide films for spinelectronics and biomedical applications of magnetic carriers. All these projects are vertically integrated from the underlying science to their engineering applications (information storage, nanotechnology and bioengineering). Select Publications (2001-present) K.M. Krishnan, A.B. Pakhomov, Y. Bao, P. Blomqvist, Y. Chun, M. Gonzales, K. Griffin, X. Ji, B.K. Roberts, "Nanomagnatism and Spin Electronics: Materials, Microstructure and Novel Properties", J Mater Sci 41, 793-815 (2006). V. F. Puntes, Kannan M. Krishnan and P.A. Alivisatos, "Colloidal Nanocrystal Size and Shape Control: the Case of Co", Science , 291, 2115 (2001). M. Varela, W. Grogger, D. Arias, Z. Sefrioui, C. Leon, C. Ballesteros, Kannan M. Krishnan, and J. Santamaria, "Direct evidence for block-by-block growth in high-temperature superconductor ultra-thin films", Phys. Rev. Lett., 86, 5156 (2001). P. Blomqvist, Kannan M. Krishnan, H. Ohldag, A. Scholl and J. Stöhr, "Direct imaging of asymmetric magnetization reversal in exchange-biased Fe/MnPd bilayers by x-ray photoemission electron microscopy", Phys. Rev. Lett. 94, 107203 (2005). Y. Bao and Kannan M. Krishnan, "Tailored and functionalized cobalt nanocrystals for potential biomedical applications", Journal of Magnetism & Magnetic Materials, 293, 15-19 (2005). M. Gonzales and Kannan M. Krishnan, "Synthesis of magnetoliposomes with monodisperse iron oxide nanocrystal cores for hyperthermia", J. Mag. Mag. Mater. 293, 265-270 (2005). K.A. Griffin, A.B. Pakhomov, C.M. Wang, S.M. Heald, Kannan M. Krishnan, "Intrinsic Ferromagnetism in Insulating Cobalt Doped Anatase TiO[sub 2]", Phys. Rev. Lett. 94, 157204 (2005).
Funded Projects (current) Isolated and Collective Magnetic Phenomena in Metallic Nanocrystals and their Superlattices (NSF/DMR 2002-05). Exchange Bias in Mn-Pd-Fe Thin Film Hetero structures (DoE-BES 2002-06). Metallic Core-shell Nanostructures: synthesis, stability, coupled properties and novel devices (NSF/DMR 2005-09). Varied synthetic approaches for the development of RT ferromagnetic and semiconducting Oxide Nanostructures for silicon-based spintronics (NSF/ECS 02-05). Acquisition of a SPM system for research and education in nanomagnetism and spinelectronics. (NSF/DMR 2003-05). Dilute Magnetic Dielectrics: New Spintronics Materials and Devices (NSF/ECS 2005-08). A physical property measurements laboratory for materials research ( Murdock foundation).
Facilities Thin Films Synthesis Laboratory: i) UHV Ion-Beam Deposition Chamber: Kaufman ion source, multiple targets, substrate heater, RGA, crystal thickness monitor. MFCs for multiple gases, load-lock etc; ii) RF/DC Sputtering system dedicated for synthesis of oxide/nitride thin film heterostructures; iii) Sol-gel synthesis and spin-coater for thin films; iv) Vacuum evaporator. Colloidal Nanocrystals Synthesis Laboratory: Environment-controlled Glove Box with inbuilt refrigerator, Centrifuges, Ovens. Fume Hoods, Dynamic Light Scattering System (to be purchased shortly). Physical Property Measurements Laboratory: i) Vibrating sample magnetometer, 2T magnet, Furnace (RT <T< 1000'C) Home-built Resistivity Probe (8O K < T < RT); ii) Break Junction apparatus for quantum conductance measurement; iii) Magneto-Optic Kerr Effect (MOKE) measurement apparatus; iv) a/c impedence; v) Quantum Design Physical Property Measurements System (being acquired). Characterization Laboratory: i) Rigaku Rotating Anode l2 kW X-ray Diffraction System, for high angle and reflectivity scans; ii) Asylum SPM system for magnetic imaging, nano-manipulation and nano-lithography; iii) Philips 420 TEM. Central Facilities: i) Priority access to SQUID Magnetometry (UW, Chem); ii) Lithography (Washington Technology Center), iii) Advanced transmission electron microscopy (NCEM/Berkeley); iv) X-ray magnetic circular dichroism (ALS/Berkeley); v) Neutron scattering (IPNS/Argonne).
Research Group Research Associates: Dr. A. Pakhomov (Joffe Institute), Dr. S. Mandal (NCL/U. Pune). Prof. I. Lee (Korea). Graduate Students: Y, Bao (Tongji),Y. Chun (ASU), M. Gonzales (UCB), K. Griffin (MIT), G. Gardner (UCB), X. Ji (Fudan), B. Roberts (Cal Poly), T.Wen (Schezuan). Undergraduate Students: Chris Petz (MSE/UW), J. Parker (EE/UW), P. Voll (Physics/UW).
Collaborators Dr. S. Chamber (PNNL), Dr. W. Grogger (U. Graz), Prof. I. Schuller (UCSD), Dr. H. Ohldag (ALS), Profs. R. Waeppling &. P. Norblad (Uppsala), Prof. D. Shindo (Tohoku), Dr. M. Ohnuma (NIMS/Iapan), Dr. M. Varela & Dr. S. Pennycook (ORNL), Prof. J. Chapman (Glasgow), Prof, A. Sandhu (Tokyo), Dr. S. te Velthuis (IPNS/ANL), Prof. P. Fannin (Dublin), Prof. D. Martin (U. Queensland), Prof. R. Stampt (UWA), Prof. M. Olmstead (UW), Prof. D. Gamelin (UW).
Awards Fellow, American Association for the Advancement of Science (2005) John Simon Guggenheim Memorial Foundation Fellow, (2004). University of Washington, College of Engineering Outstanding Educator Award (2004). Japan Society for the Promotion of Science, Senior Scientist Short-term Invitational Fellowship, Summer (2003). Fellow, Institute of Physics, London (December, 2001). UC Berkeley Chapter, Materials Research Society Outstanding Teaching Award (Spring 1996) for the Course “Magnetism, magnetic materials and related applications”. HIVIPS Senior Visiting Scientist Fellowship, Hitachi Ltd., Japan (1993-94). Eli Franklin Burton Medal, Microscopy Society of America, 1992 for "sustained scientific achievement by a young scientist under 35 years of age".
Other Appointments & Activities Professor-at-Large, Institute of Advanced Study, Univ. of Western Australia (2006-08). Member, Editorial Board, Journal of Materials Science, (2004- present). Member, Editorial Board, Journal of Physics D: Applied Physics (2000-04). Deputy Editor, Physical Properties, Acta/Scripta Materialia, (1994-99).
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