Research statement

Doug Natelson is interested in nanoscale physics, in particular the electrical and magnetic properties of systems with characteristic dimensions approaching the single-nm scale. A variety of unusual phenomena arise in this size regime, and an understanding of the properties of matter on these scales may well have a profound impact on future technologies.

To explicitly see the impact of quantum mechanics on the properties of matter (e.g. quantum interference contributions to electrical conduction) typically requires small systems (~ 1 micron, or 1/100 the diameter of a human hair) and low temperatures (often < 4.2 K, or -269 degrees Celcius). However, at the atomic size limit quantum effects can dominate even at room temperature. The transition from quantum to classical behavior is called "decoherence" or "dephasing". As systems approach the nanoscale the interplay between quantum effects, the "decohering" influence of the environment, electronic correlations like magnetism and superconductivity, and disorder lead to an impressively rich area of study.

Techniques now exist for controllably fabricating structures with characteristic lengths below 10 nm, through both "top-down" methods (combining electron beam lithography, directional etching, and metal deposition) and "bottom-up" approaches (chemical fabrication, self-assembly). We can now examine "traditional" solid state systems at previously unexplored scales by making samples in this newly accessible regime. Further, we can utilize our skills to develop tools (e.g. sets of nm-spaced electrodes, sensitive nanomagnetometers) for studying novel materials such as fullerenes and other molecular and molecular-scale objects.

Areas of interest include electronic, magnetic, and optical studies of atomic- and molecular-scale devices; nanostructure-based studies of strongly correlated materials, and organic semiconductors. Eventual technological relevance may be possible in areas such as molecular electronics and quantum information processing.

In addition to learning a lot of neat physics, people in this research group will develop skills in micro- and nanofabrication, sensitive electrical measurements, various microscopy techniques, semiconductor physics, low temperature physics, and vacuum systems. Anyone interested in working in this group is encouraged to send email (natelson@rice.edu).

Jiangtan Yuan, Jingjie Wu, Will J. Hardy, Philip Loya, Minhan Lou, Yingchao Yang, Sina Najmaei, Menglei Jiang, Kunttal Keyshar, Heng Ji, Weilu Gao, Jiming Bao, Junichiro Kono, Douglas Natelson, Pulickel M. Ajayan, and Jun Lou "Facile synthesis of single crystal vanadium disulfide nanosheets by chemical vapor deposition for efficient hydrogen evolution reaction." Adv. Mater., 27 (2015) : 5605-5609.

Jin Hu, Xue Liu, Chunlei Yue, Jinyu Liu, Huiwen Zhu, Jibao He, Jiang Wei, Z.Q. Mao, Liubov Antipina, Zakhar Popov, Pavel Sorokin, Tijiang Liu, Philip Adams, Seyed Radmanesh, Leonard Spinu, Heng Ji, and Douglas Natelson "Enhanced Electron Coherence in Atomically Thin Nb3SiTe6." Nature Phys., 11 (2015) : 471-476.

Kenneth M. Evans, Pavlo Zolotavin, and Douglas Natelson "Plasmon-assisted photoresponse in Ge-coated bowtie junctions." ACS Photonics, 2 (2015) : 1192-1198.

W. J. Hardy, C.-W. Chen, A. Marcinkova, J. Sinova, D. Natelson, and E. Morosan "Very large magnetoresistance in Fe0.28TaS2 single crystals." Phys. Rev. B, 91 (2015) : 054426.

B. Huber-Rodriguez, Siu Yi Kwang, W. J. Hardy, H. Ji, C.-W. Chen, E. Morosan, and D. Natelson, "Thermal Barkhausen effect at the metal-insulator transition in vanadium dioxide", Appl. Phys. Lett. 105, 131902 (2014)

J. B. Herzog, M. W. Knight, and D. Natelson, "Thermoplasmonics: Plasmonic heating in single nanowires", Nano Lett. 14, 499-503 (2014).

J. Lin, A.-R. O. Raji, K. W. Nan, Z. W. Peng, Z.Yan, E. L. G. Samuel, D. Natelson, and J. M. Tour, "Iron oxide nanoparticle and graphene nanoribbon composite as an anode material for high-performance Li-ion batteries", Adv. Funct. Mater. 24, 2044-2048 (2014).

J. Lin, H. Ji, M. W. Swift, W. J. Hardy, Z. Peng, X. Fan, A. H. Nevidomskyy, J. M. Tour, and D. Natelson, "Hydrogen diffusion and stabilization in single-crystal VO₂ micron/nanobeams by direct atomic hydrogenation", Nano Lett. 14, 5445-5451 (2014).

R. Chen, M. Matt, F. Pauly, P. Nielaba, J. C. Cuevas, and D. Natelson, "Shot noise variation within ensembles of gold atomic break junctions at room temperature", J. Phys.: Condens. Matt. 26, 474204 (2014). Special issue on break junctions.

R. S. Arvidson, C. Fischer, D. S. Sawyer, G. D. Scott, D. Natelson, and A. Luttge, "Lateral resolution enhancement of vertical scanning interferometry by sub-pixel sampling", Microsc. Microanal. 20, 90-98 (2014).

W. J. Hardy, H. Ji, E. Mikheev, S. Stemmer, and D. Natelson, "Nanostructure investigations of nonlinear differential conductance in NdNiO₃ thin films", Phys. Rev. B 90, 205117 (2014).

Y. Filinchuk, N. A. Tumanov, V. Ban, H. Ji, J. Wei, M. W. Swift, A. H. Nevidomskyy, and D. Natelson,"In situ diffraction study of catalytic hydrogenation of VO₂: Stable phases and origins of metallicity", J. Amer. Chem. Soc. 136, 8100-8109 (2014).

Y. Li, P. Doak, J. B. Neaton, L. Kronik, and D. Natelson, "Voltage tuning of vibrational mode energies in single-molecule junctions", Proc. Nat. Acad. Sci. US 111, 1282-1287 (2014).

D. Natelson, Y. Li, and J. B. Herzog, "Nanogap structures: combining enhanced Raman spectroscopy and electronic transport", Phys. Chem. Chem. Phys. 15, 5262-5275 (2013).

G. D. Scott, D. Natelson, S. Kirchner, and E. Munoz, "Transport characterization of Kondo-correlated single-molecule devices", Phys. Rev. B 87, 241104 (2013).

G. Wang, A. C. Lauchner, J. Lin, D. Natelson, K. V. Palem, and J. M. Tour, "High-performance and low-power rewritable SiO_x 1 kbit one diode-one resistor crossbar memory array", Adv. Mater. 25 4789-4793 (2013).

J. B. Herzog, M. W. Knight, Y. Li, K. M. Evans, N. J. Halas, and D. Natelson, "Dark plasmons in hot spot generation and polarization in interelectrode nanoscale junctions", Nano Lett. 13, 1359-1364 (2013).

J. Lin, C. Zhang, Z. Yan, Y. Zhu, Z. Peng, R. H. Hauge, D. Natelson, and J. M. Tour, "3-Dimensional graphene carbon nanotube carpet-based microsupercapacitors with high electrochemical performance", Nano Lett. 13, 72-78 (2013).

J. Lin, Z. W. Peng, C. S. Xiang, G. D. Ruan, Z. Yan, D. Natelson, and J. M. Tour, "Graphene nanoribbon and nanostructured SnO₂ composite anodes for lithium ion batteries", ACS Nano 7, 6001-6006 (2013).

P. J. Wheeler, Ruoyu Chen, and D. Natelson, "Noise in electromigrated nanojunctions", Phys. Rev. B 87, 155411 (2013).

A. A. Fursina, R. G. S. Sofin, I. V. Shvets, and D. Natelson, "Statistical distribution of the electric field driven switching of the Verwey state in Fe₃O₄", New Journal of Physics 14, 013019 (2012).

E. Morosan, D. Natelson, A. H. Nevidomskyy, and Q. M. Si, "Strongly Correlated Materials", Adv. Mater. 24, 4896-4923 (2012).

H. Ji, J. Wei, and D. Natelson, "Modulation of the electrical properties of VO₂ nanobeams using an ionic liquid as a gating medium", Nano Lett. 12, 2988-2992 (2012).

J. H. Worne, H. Gullapalli, C. Galande, P. M. Ajayan, and D. Natelson, "Local charge transfer doping in suspended graphene nanojunctions", Appl. Phys. Lett. 100, 023306 (2012)

J. Lin, C. Zhang, Z. Yan, Y. Zhu, Z. Peng, R. H. Hauge, D. Natelson, and J. M. Tour, "3-Dimensional graphene carbon nanotube carpet-based microsupercapacitors with high electrochemical performance", Nano Lett. (in press, 2013).

J. Yao, J. Lin, Y. Dai, G. Ruan, Z. Yan, L. Li, L. Zhong, D. Natelson, and J. M. Tour, "Highly transparent nonvolatile resistive memory devices from silicon oxide and graphene, Nature Comms. 3, 1101 (2012).

J. Yao, L. Zhong, D. Natelson, and J. M. Tour, "In situ imaging of the conducting filament in a silicon oxide resistive switch", Nature Scientific Reports 2, 242 (2012).

N. J. Halas, S. Lal, S. Link, W.-S. Chung, D. Natelson, J. H. Hafner, and P. Nordlander, "A plethora of plasmonics from the Laboratory for Nanophotonics at Rice University", Adv. Mater. 24, 4842-4877 (2012).

R. Chen, P. J. Wheeler, and D. Natelson, "Excess noise in STM-style break junctions at room temperature", Phys. Rev. B 85, 235455 (2012).

A. Garcia-Martin, D. R. Ward, D. Natelson, and J. C. Cuevas, "Field enhancement in subnanometer metallic gaps", Phys. Rev. B 83, 193404 (2011).

D. Natelson and M. Di Ventra, "Ion motion and electrochemistry in nanostructures", MRS Bulletin 36(11), 914-920 (2011).

J. Wei and D. Natelson, "Nanostructure studies of strongly correlated materials", Nanoscale 3, 3509-3521 (2011).

J. Wei, H. Ji, W. Guo, A. Nevidomskyy, and D. Natelson, "Hydrogen stabilization of metallic VO₂ in single-crystal nanobeams", Nature Nano. 7, 357-362 (2012).

J. Yao, L. Zhong, D. Natelson, and J. M. Tour, "Intrinsic resistive switching and memory effects in silicon oxide", Appl. Phys. A 102, 835-839 (2011).

A. A. Fursina, R. G. S. Sofin, I. V. Shvets, and D. Natelson, "Interfacial transport properties between a strongly correlated transition metal oxide and a metal: Contact resistance in Fe₃O₄/M (M=Cu, Au, Pt) nanostructures", Phys. Rev. B. 82, 245112 (2010).

D. R. Ward, D. A. Corley, J. M. Tour, and D. Natelson, "Vibrational and electronic heating in nanoscale junctions", Nature Nano. 6, 33-38 (2011).

D. R. Ward, F. Hueser, F. Pauly, J. C. Cuevas, and D. Natelson, "Optical rectification and field enhancement in a plasmonic nanogap", Nature Nano. 5, 732-736 (2010).

G. D. Scott and D. Natelson, "Kondo resonances in molecular devices", ACS Nano 4, 3560-3579 (2010).

G. D. Scott, J. J. Palacios, and D. Natelson, "Anomalous transport and possible phase transition in Pd nanojunctions", ACS Nano 4, 2831-2837 (2010).

J. H. Worne, J. E. Anthony, and D. Natelson, "Transport in organic semiconductors in large electric fields: From thermal activation to field emission", Appl. Phys. Lett. 96, 053308 (2010).

J. Yao, L. Zhong, D. Natelson, and J. M. Tour, "Silicon oxide is a non-innocent surface for molecular electronics and nanoelectronics studies", J. Am. Chem. Soc., in press (2010).

J. Yao, Z. Sun, L. Zhong, D. Natelson, and J. M. Tour, "Resistive switches and memories from silicon oxide", Nano Lett. 10, 4105-4110 (2010).

P. J. Wheeler, J. N. Russom, K. Evans, N. S. King, and D. Natelson, "Shot noise suppression at room temperature in atomic-scale Au contacts", Nano Lett. 10, 1287-1292 (2010).

A. A. Fursina, R. G. S. Sofin, I. V. Shvets, and D. Natelson "The origin of hysteresis in resistive switching in magnetite is Joule heating", Phys. Rev. B 79, 245131 (2009)

A. Sinitskii, A. A. Fursina, D. Kosynkin, A. Higginbotham, D. Natelson, and J. M. Tour, "Electronic transport in monolayer graphene nanoribbons produced by chemical unzipping of carbon nanotubes", Appl. Phys. Lett. 95, 253108 (2009).

G. D. Scott, Z. K. Keane, J. W. Ciszek, J. M. Tour, and D. Natelson. "Universal scaling of nonequilibrium transport in the Kondo regime of single molecule devices", Phys. Rev. B 79, 165413 (2009)

J. Yao, J. Zhong, L. Zhong, D. Natelson, and J. M. Tour, "Two-terminal nonvolatile memories based on single-walled carbon nanotubes", ACS Nano 3, 4122-4126 (2009).

M. R. Calvo, J. Fernandez-Rossier, J. J. Palacios, D. Jacob, D. Natelson, and C. Untiedt. "The Kondo Effect in ferromagnetic atomic contacts", Nature 458, 1150-1153 (2009).

B.H. Hamadani, D.A. Corley, J.W. Ciszek, J.M. Tour, and D. Natelson "Controlling charge injection in organic field-effect transistors using self-assembled monolayers." Nano Lett., 6 (2006) : 1303-1306.

C.H. Ahn, A. Bhattacharya, M. Di Ventra, J.N. Eckstein, C. Daniel Frisbie, M.E. Gershenson, A.M. Goldman, I.H. Inoue, J. Mannhart, A.J. Millis, A.F. Morpurgo, D. Natelson, and J.-M. Triscone "Electrostatic modification of novel materials." Rev. Mod. Phys., 78 (2006) : 1185-1212.

C.T. Yavuz, J.T. Mayo, W.W. Wu, A. Prakash, J.C. Falkner, S. Yean, L. Cong, H.J. Shipley, A. Kan, M. Tomson, D. Natelson, and V.L. Colvin "Low-field magnetic separation of monodisperse Fe3O4 nanocrystals." Science, 314 (2006) : 964-967.

D. Natelson, L.H. Yu, J.W. Ciszek, Z.K. Keane, and J.M. Tour "Single-molecule transistors: electron transfer in the solid state." Chemical Physics, 324 (2006) : 267-275.

J.W. Ciszek, Z.K. Keane, L. Cheng, M.P. Stewart, L.H. Yu, D. Natelson, and J.M. Tour "Neutral complexes of first row transition metals bearing unbound thiocyanates and their assembly on metallic surfaces." J. Am. Chem. Soc., 128 (2006) : 3179-3189.

Z.K. Keane, J.W. Ciszek, J.M. Tour, and D. Natelson "Three-terminal devices to examine single-molecule conductance switching." Nano Lett., 6 (2006) : 1518-1521.

Z.K. Keane, L.H. Yu, and D. Natelson "Magnetoresistance of atomic-scale electromigrated nickel nanocontacts." Applied Physics Letters, 88 (2006) : 062514.

A. Trionfi, S. Lee, and D. Natelson "Time-dependent universal conductance fluctuations and coherence in AuPd and Ag." Physical Review B, 72 (2005) : 035407.

B. Hamadani, D. Natelson "Nonlinear charge injection in organic field-effect transistors." Journal of Applied Physics, 97 (2005) : 064508.

B.H. Hamadani, D. Natelson "Extracting contact effects in organic field-effect transistors." Proceedings of the IEEE, Special Issue on Flexible Electronics Technology, 93 (2005) : 1306-1311.

B.H. Hamadani, Natelson, D. "Gated nonlinear transport in organic polymer field effect transistors." Journal of Applied Physics, 95 (2004) : 1227-1232.

L.H. Yu, Z.K. Keane, J.W. Ciszek, L. Cheng, J.M. Tour, T. Baruah, M.R. Pederson, and D. Natelson "Strong Kondo physics and anomalous gate dependence in single-molecule transistors." Physical Review Letters, 95 (2005) : 256803.

L.H. Yu, Z.K. Keane, J.W. Ciszek, L. Cheng, M.P. Stewart, J.M. Tour, and D. Natelson "Inelastic electron tunneling via molecular vibrations in single-molecule transistors." Physical Review Letters, 93 (2004) : 266802.

S. Kirchner, L. Zhu, Q. Si, and D. Natelson "Quantum critical Kondo effect in a quantum dot coupled to ferromagnetic leads." Proceedings of the National Academy of Sciences of the United States, 102 (2005) : 18824-18829.

B.H. Hamadani and D. Natelson "Temperature-dependent contact resistances in high quality polymer field-effect transistors." Appl. Phys. Lett., 84 (2004) : 443-445.

L.H. Yu and D. Natelson "Kondo physics in C60 single-molecule transistors." Nano Letters, 4(1) (2004) : 79-84.

D. Natelson, "Big lessons about small things", Nature Nano. 9, 488 (2014).

D. Natelson, "Condensed matter physics: A solid triple point", Nature 500, 408-409 (2013).

D. Natelson, "Mechanical break junctions: Enormous information in a nanoscale package", ACS Nano 6, 2871-2876 (2012).

D. Natelson, "Carrier Characteristics", Nature Materials 9, 703-704 (2010).

D. Natelson, "Correlated electron systems: better than average", Nature Nano. 4, 406-407 (2009).

D. Natelson, "Towards the ultimate transistor", Physics World 22, 27-31 (2009). Also re-published in abridged form in Compound Semiconductor magazine.

D. Natelson "Nanostructures and Nanotechnology." 

A. Trionfi, S. Lee, and D. Natelson "Time dependent universal conductance fluctuations in AuPd, Ag, and Au wires." AIP Conf. Proc., 850 (2006) : 1411-1412.

D. Natelson, L.H. Yu, Z.K. Keane, J.W. Ciszek, L. Cheng, and J.M. Tour "Kondo physics in single-molecule transistors." AIP Conf. Proc., 850 (2006) : 1365-1366.

D. Natelson, D. R. Ward, F. Hueser, F. Pauly, J. C. Cuevas, D. A. Corley, and J. M. Tour, "Plasmons in nanoscale metal junctions: optical rectification and thermometry", Proceedings of the SPIE (Optics+Photonics 2011) 8096, 80961O (2011).

D. Natelson, B.H. Hamadani, J.W. Ciszek, D.A. Corley, and J.M. Tour "Contact effects in polymer field-effect transistors." Proceedings of the SPIE, 6336 (2006) : 63360M.

speaker.  "2d Materials:  Opportunities for Electronics, Magnetism, and Optics." Smalley Curl Institute, Graphene Day, Rice University. (11/15)

colloquium speaker.  "Heating in atomic- and molecular-scale junctions." Louisiana State University, Baton Rouge, LA. (2/15)

colloquium speaker.  "How does heating work at the nanoscale?." University of Kentucky, Lexington, KY. (4/15)

invited speaker.  "Nanogap plasmonic structures for Raman studies of single molecules and heating." American Chemical Society National Meeting, Denver, CO. (3/15)

colloquium speaker.  "Nanostructures and strongly correlated materials." Tulane University, Dept. of Physics, New Orleans, LA. (4/15)

invited speaker.  "Tuning vibrational energies in single-molecule junctions." Batsheva de Rothschild Seminar on Molecular Electronics , Jerusalem, Israel . (6/15)

colloquium speaker.  "How does heating work at the nanoscale?." SUNY Binghamton Department of Physics, Binghamton, NY. (4/14)

speaker.  "Raman, noise, and resistane measurements to assess heating at the nanoscale." International Workshop on Controlled Charge and Heat Transport at the Molecular Scale, University of Konstanz. (9/14)

speaker.  "Vanadium dioxide and hydrogen:  Doping and the metal-insulator transition." Physics at the Falls workshop on oxides, University of Buffalo. (5/14)

speaker.  "Vanadium dioxide:  A switchable permeable membrane for hydrogen." NorTex Conference, Rice University. (10/14)

Invited talk, International meeting, Quantum Transport in Nanoscale Molecular Systems, Telluride, CO, “Electron heating (and voltage tuning of molecular properties) in nanoscale junctions” (7/2013)

Invited talk, International meeting, Building Blocks for Carbon-Based Electronics:  From Molecules to Nanotubes, University of Regensburg, Germany, “Molecular-scale Raman as a tool:  Bias-driven shifts of C₆₀ vibrational states” (4/2013)

Invited talk, ARO workshop on Heavy Fermion Materials and Quantum Phase Transitions, Rice University, “Nanoscale junctions to examine Kondo systems out of equilibrium” (12/2013)

Presentation, DOE Basic Energy Sciences experimental condensed matter physics PI meeting, “Nanostructure studies of strongly correlated materials” (9/2013)

"Molecular scale junctions out of equilibrium." International CECAM Workshop on Quantum Transport in Molecular Nanostructures, Trinity College, Dublin, Ireland. (5/2012)

"Molecular scale junctions out of equilibrium:  Raman and noise measurements." International meeting, Molecular Electronics in Jerusalem, Hebrew University, Jerusalem, Israel. (7/2012)

colloquium speaker.  "Nanoscale junctions:  optical effects, heating, and taking the temperature on the nanometer scale." University of Illinois, Department of Physics, Urbana-Champaign. (2/2012)

"Nanoscale plasmonic junctions for sensing and optoelectronic applications." TransAtlantic Science Week (US-Norway Symposium), Rice University, Houston, TX. (11/2012)

"Nanostructures and Molecular Devices." Developments and Prospects in Quantum Impurity Physics Advanced School and Workshop, Max Planck Institute for Complex Systems, Dresden, Germany. (5/2011)

"Beyond dc transport:  electronic and optical measurements on single-molecule junctions." International Conference on Molecular Electronics, Emmetten, Switzerland. (01/2010)

"Nanoscale physics and what I learned at Stanford." 65th Birthday Symposium in Honor of D. D. Osheroff, Stanford University. (10/2010)

"Atomic and molecular scale devices: beyond DC electronic transport." Physics and Astronomy Colloquium, Rice University, Houston, TX. (9/2009)

"Correlations in single-molecule transistors and other nanoscale junctions." Hangzhou Workshop on Quantum Matter, Zhejiang University, Hangzhou, China. (10/2009)

"Nanostructures for fun and (intellectual) profit." Carleton College. (4/2009)

"Nanostructures to examine transport, dissipation, and correlations." Center for Nanoscale Materials, Argonne National Lab. (3/2009)

"Simultaneous electronic transport and Raman spectroscopy in single-molecule devices." National Nanotechnology Initiative Workshop on Nanotechnology Enabled Sensing, Arlington, VA. (5/2009)

"Simultaneous electronic transport and Raman spectroscopy in single-molecule devices." American Physical Society March Meeting, Pittsburgh, PA. (3/2009)

"Simultaneous electronic transport and Raman spectroscopy in single-molecule devices." International CECAM workshop on Quantum Transport at the Molecular Scale, Bremen, Germany. (9/2009)

"Plasmons in nanoscale metal junctions:  optical rectification and (effective) thermometry." SPIE Nanoscience and Engineering Conference, San Diego, CA. (8/2011)

"Taking the temperature of single molecules via surface-enhanced Raman spectroscopy." Rice Quantum Insttitute Summer Research Colloquium, Rice University. (8/2011)

speaker.  "Presenting science to the public:  'It's late; we're all tired; why should any of us care about anything you're saying?'." NerdNite Houston, Houston. (1/14)

"Nanoscale electronics and quantum effects." Glasscock School of Continuing Studies, Rice University. (9/2010)

Presenter.  "Hydrogen-stabilized metallic states in VO2:  Structure and transport." Gordon Research Conference on Correlated Electrons, Mt. Holyoke, MA. (7/14)

Poster, 25^th Anniversary Packard Fellows Meeting, Denver, CO, “Heating and electronic interactions approaching the atomic scale”

speaker.  "How does heating work at the nanoscale?." Columbia University Department of Physics, New York. (12/14)

Colloquium, Department of Physics, Pomona College, Claremont, CA, “Heating at the nanoscale” (2/2013)

Condensed matter seminar, Department of Physics, Texas A&M University, “Heating at the nanoscale:  Vibrational and electronic processes”

Colloquium, Department of Physics, University of Alberta, Edmonton, “Molecular scale junctions out of equilibrium:  Raman and noise measurements” (1/2013)

Seminar, Department of Chemistry, UCSD, San Diego, CA, “Molecular scale junctions out of equilibrium:  Raman measurements” (2/2013)

"Nanoscale junctions:  optical effects, heating, and taking the temperature at the nanometer scale." Purdue University Department of Physics, West Lafayette, IN. (4/2011)

"Plasmonics:  Optical antennas, chemical sensing, and photodetection." Lockheed Martin Advanced Technology Center, Palo Alto, CA. (12/2011)

"Atomic and molecular scale devices:  beyond dc electronic transport." Department of Chemistry, Northwestern University. (5/2010)

"Beyond dc transport in atomic and molecular scale junctions." Center for Complex Quantum Systems, University of Texas. (02/2010)

"Nanostructures to examine strongly correlated materials:  magnetite." Texas Center for Superconductivity, University of Houston. (11/2010)

"Atomic and molecular scale devices: beyond DC electronic transport." Center for Nanophysics and Advanced Materials colloquium, University of Maryland, College Park, MD. (12/2009)

"Atomic and molecular scale devices: beyond DC electronic transport." Michigan State University Department of Physics and Astronomy, East Lansing, MI. (11/2009)