Semiconductor heterostructures form the basis for many of our modern technologies, ranging from high-speed transistors to the laser diode. They also provide an ideal playground for exploring the physics of interacting electrons in two dimensions. When a perpendicular magnetic field is applied to a two-dimensional electron gas, the electronic density of states is transformed into a series of discrete, highly degenerate, states known as Landau levels (LL). At high fields, all of the electrons can be accommodated within a single LL known as the lowest (N=0) LL. Within the lowest LL, transport is dominated by the fractional quantum Hall effect (FQHE). The strong correlations of the FQHE in the lowest LL are now understood in the framework an intuitively appealing model of weakly interacting composite fermions. At lower magnetic fields where more than one LL is occupied, physics is much more complicated. In this regime the FQHE competes with other correlated, but inhomogeneous, ground states, producing some spectacular transport signatures at low temperatures. In this talk I will describe our efforts to understand and modify the possible ground states in the higher LL’s of extremely high mobility two-dimensional electron and hole systems. In addition, I will detail our experimental efforts to confine the fragile FQHE at filling factor 5/2 in micron scale geometries. The quasiparticles of the 5/2 state are believed to obey non-Abelian statistics. Small scale devices in which the 5/2 state’s quasiparticles can be manipulated may someday provide a platform for quantum computation.

3.2: Tuesday, January 15, 7:00PM, Class of 1950 Lecture Hall: “What should be the future of biofuels? An open discussion and debate,” sponsored by the Center for the Environment

Featuring a panel of Purdue experts who will discuss their perspectives on the environmental, technical, and policy related issues surrounding the increasing production and promotion of biofuels. Following brief statements from each panelist, questions will be taken from the audience. Participants will include: Moderator—Dr. Bernie Tao, Indiana Soybean Professor in Soybean Utilization in the Department of Agricultural and Biological Engineering; and Panelists—Dr. Mike Ladisch, Director, Laboratory of Renewable Resources Engineering and Distinguished Professor of Agricultural and Biological Eng; Dr. Larry Nies, Associate Professor of Civil Engineering and Division of Environmental & Ecological Engineering; Dr. Wally Tyner, Professor of Agricultural Economics and June 2007 Lugar Energy Patriot; and Dr. Tony Vyn, Professor of Agronomy

3.3: Wednesday, January 16, 2:30PM, EE317: “Multiphase Gallium Nitride Nanowires and Nanocircuits,” by Virginia Ayres

ASBSTRACT: Catalyst-free vapor-solid nanowire growth, a newly described method for the production of nanowires compatible with a wide variety of semiconductor materials, has been used to produce novel multiphase zinc-blende/wurtzite gallium nitride nanowires. Orientation relation-ships within the multiphase nanowire were observed using high-resolution transmission electron microscopy of cross-sections created with focused ion beam techniques. A totally coherent interface be-tween the zinc blende and wurtzite phases, which is sustained over the entire length of the nanowire, is identified and discussed. Multiphase nanowire growth occurs at specific nanoscale nucleation sites on platelets of gallium nitride. Furnace growth temperature has been shown to exert a strong influence on nucleation site formation. The types of nanowires that form and the corresponding nanowire nucleation sites over the furnace growth temperature range 850-1000°C are discussed. Multiphase nanowires may have novel properties that augment and may be superior to single-phase nanowires in device applications. The electronic performance of the new multiphase nanowires in a NanoFET configuration is investigated using 2-point and 4-point probe current-voltage characterizations. The current-voltage characterizations were carried in a special nano-probing system, in which oxide sharpened ~30 nm radius tungsten nanoprobes were coupled to directly a nanowire while the experiments were directly visualized using a scanning electron microscope. All measurements showed high current densities. Evidence for single-phase current transport within the multiphase nanowire structure is discussed. Novel multiphase gallium nitride nanowires and nano-circuits may provide unique flexibility for photon and carrier confinement.
*with collaborators: B.W. Jacobs, K. McElroy, M.A. Crimp, Michigan State University; J.B. Halpern, and M-Q. He, Howard University; H.C. Shaw, NASA Goddard Space Flight Center; M.P. Petkov, NASA Jet Propulsion Laboratory.
BIO: Virginia M. Ayres is an Associate Professor in the Department of Electrical & Computer Engineering, and heads the Electronic and Biological Nanostructures Laboratory (http://www.egr.msu.edu/ebnl ) at Michigan State University. Her research interests include the reduced dimensionality-based electronic properties of nanotubes and nanowires. Dr. Ayres earned her Ph.D. and M.S. in Physics from Purdue University, and her B.A. in Physics and Biophysics from the Johns Hopkins University. She is the recipient of two NASA Faculty Fellowship Awards and of two international awards from the Japan Society for Promotion of Science and from Tokyo Institute of Technology for research and education in Japan.

3.4: Thursday, January 17, 12:30PM, Pfendler Auditorium 241: “Advances in Drug Delivery and Tissue Engineering,” by Robert S. Langer, Sc.D.; Draper Award Winner; Institute Professor, Massachusetts Institute of Technology; 2007 National Medal of Science Recipient; Member of the National Academy of Science, National Academy of Engineering and Institute of Medicine.

Advances in drug delivery and tissue engineering are revolutionizing medical therapies. New drug delivery technologies including novel polymers and intelligent microchips promise to create new treatments for cancer, heart disease, and many other illnesses. Furthermore, by combining mammalian cells with synthetic polymers, new approaches for engineering tissues are being developed that may someday help repair tissues for patients with burns, damaged cartilage, paralysis and vascular disease.

BIO: Ron Reifenberger is currently a professor of Physics at Purdue University and is a member of Purdue’s Center for Sensing Science and Technology (CSST). He is also a member of Purdue’s Birck Nanotechnology Center. Reifenberger received his PhD in Physics from the University of Chicago in 1976 and has received the Distinguished Physics Alumni Award from his alma mater, John Carroll University, in 1992. He is on the Editorial Board of the Journal of Nanoscience and Nanotechnology. His research is mainly focused on the development of new scanning probe microscope techniques for the study the nanoscale properties of matter.

ABSTRACT: The miniaturization of components and products increasingly requires the manufacture of micro/meso-scale features in the range of a few microns to a few millimeters on components whose size does not exceed several millimeters. Yet, in spite of the perceived similarity between conventional and micro/meso-scale manufacturing the physical mechanisms that govern the latter processes are vastly different and so are the characteristics of the machines and systems that are needed for their execution. In regard to the machines and systems there is ample of evidence to suggest that downscaled processes and machines exhibit superior capabilities. In this presentation a few key aspects of process and machine miniaturization will be addressed on two representative examples. The first is the development of miniaturized machine tools and their key component, an ultra-high speed spindle, for micro-cutting operations in conjunction with the analysis and modeling of dynamic instabilities in these operations. The second is a comprehensive discussion of the feasibility of developing monolithic mechanisms for micro/meso-scale part manipulation. The specific example will focus on a shape memory alloy based manipulator. Issues to be discussed include the manufacture of the mechanism, the feasibility of “self-sensing” and the modeling of the transformation kinetics and dynamics of the device.

BIO: Kornel F. Ehmann is the James N. and Nancy J. Farley Professor in Manufacturing and Entrepreneurship of the Mechanical Engineering Department at Northwestern University. Professor Ehmann received his B.S. and M.S. degrees in 1970 and 1974 respectively from the University of Belgrade and his Ph.D. degree from the University of Wisconsin-Madison in 1979, all in Mechanical Engineering. He has served as a Professor from 1990-present, an Associate Professor from 1985-1990, both in the Department of Mechanical Engineering at Northwestern University, and as an Assistant Professor from 1981-1985 in the Department of Mechanical Engineering at the University of Wisconsin-Madison. He is currently also an Adjunct Professor of the Department of Mechanical Science and Engineering at the University of Illinois at Urbana/Champaign, a Distinguished Honorary Professors of the Department of Mechanical Engineering at the Indian Institute of Technology (IIT) Kanpur, and a University Chair Professor at the Chung Yuan Christian University, Taiwan. Dr. Ehmann’s main research interests are in the interrelated areas of machine tool structural dynamics, metal cutting processes and dynamics, computer control of machine tools and robots, accuracy control in machining, and micro/meso-scale mechanical manufacturing. General Dynamics, General Electric, General Motors, Ford, Chrysler, IBM, Ingersoll Milling Machine Co., SpeedFam, American Tool Co., LLNL, NIST and others have supported his work. Dr. Ehmann has published close to 200 articles and supervised over 40 MS and 40 Ph.D. students in these areas. Dr. Ehmann is currently the Technical Editor of the ASME Transactions: Journal of Manufacturing Science and Engineering (formerly Journal of Engineering for Industry), and an Associate Editor of the SME Journal of Manufacturing Processes. He has served as the President of NAMRI/SME and as the Chair of the Manufacturing Engineering Division of ASME. He is a fellow of ASME and SME and a recipient of the SME Gold Medal.

ABSTRACT: The presentation introduces several examples where recent advances in cinematic digital holography including holographic microscopy enable measurements of 3D flow structures and particle dynamics at unprecedented resolution. Examples include: Tracking of thousands of fuel droplets in a locally isotropic turbulent flow enables measurement of their turbulent diffusion coefficient as a function of turbulence level and droplet properties; Studying the near-wall flow within a turbulent boundary layer over a smooth wall, while fully resolving the viscous sublayer, buffer layer and lower portion of logarithmic layer. Resolution is sufficient for measuring the instantaneous wall shear stress distributions from velocity gradients in the viscous sublayer. Conditional sampling based on local shear stress magnitude identifies characteristic 3-D flow structures that generate extreme wall stress events; Measuring the flow generated by swimming of a copepod, a mm size marine organism, and its effect on its swimming behavior. A recirculating flow pattern in the copepod’s frame of reference is caused by the combined effects of sinking and a propulsive force generated by the feeding appendages. The low Reynolds numbers associated with motion of 0.1 mm naupleus, a baby copepod, cause it to recoil as it brings its swimming appendages forward to propel itself; Characteristics of the generally helical but complex swimming of 10-30 mm dinoflagellates change dramatically with introduction of prey into the sample volume, demonstrating different predation strategies. The presentation will conclude with introduction of a submersible, free drifting oceanic holography system. Data from recent deployments display behavior of and interactions among several organisms, such as a dinofalgellate escaping from a naupleus, and clouds of particles around swimming Appendictularians.

JOSEPH KATZ received a B.S degree from Tel Aviv University and M.S and PhD from the California Institute of Technology, all in Mechanical Engineering. After several years at Purdue University, Dr. Katz joined The Johns Hopkins University in 1988, and has been a professor of mechanical engineering for over 10 years. He is currently the William F. Ward, Sr. Distinguished Professor of Mechanical Engineering. In addition, he manages the Laboratory for Experimental Fluid Dynamics and is Technical Editor of the Journal of Fluids Engineering. Dr. Katz’ research is focused on experimental fluid mechanics and development of advanced diagnostics techniques for laboratory and field applications, including Particle Image Velocimetry (PIV) and holography. His research interests include turbulent multiphase flows, complex flow structure and turbulence within turbomachines, flow induced vibrations, boundary layers on smooth and rough walls including the bottom boundary layer of the coastal ocean and canopy flows, as well as measurements of swimming behavior of plankton both in the laboratory and in the ocean.

ABSTRACT: In the last decade, an emerging area of research is the development and implementation of biological sensors that could respond to the today’s needs for low cost, rapid detection, higher selectivity and sensitivity for the analyte of interest. However, despite extensive research in biosensors and their enormous potential compared to laboratory-based analytical techniques, the biosensor market is relatively small and numerous problems still remain to be solved. This presentation will discuss new ways of designing biosensors with improved selectivity and lower detection limits. Novel materials and advanced immobilization methods capable of depositing biologically active material, particularly enzymes, onto or in close proximity of the transducer surface and applications of these devices for the detection of clinically and environmental important analytes will be presented. Problems associated with a direct detection of hydrogen peroxide, enzyme stability, interferences and overlapping signals in clinical samples will also be addressed.

BIO: Dr. Silvana Andreescu received her PhD in 2002 in Agrochemistry from the University of Perpignan, France and in Analytical Chemistry from the University of Bucharest, Romania. In the same year she was awarded a NATO-NSF postdoctoral fellowship award when she joined the Department of Chemistry, State University of New York at Binghamton as a postdoctoral fellow. Since 2005, she is an assistant professor at Clarkson University, Potsdam, NY. Her main research interests include the development of biosensors for monitoring different analytes of interest in clinical, food quality and environmental control. Other interests include development of multifunctional biocapsules for use in alternative energy production and bioremediation.

Friday November 16, 2007

3:30pm PHYS 223

Refreshments are served at 3:00 p.m. in Physics room 242.

Dr. Zhigang Jiang

Columbia University and National High Magnetic Field Laboratory

Graphene, a single atomic sheet of graphite, is a monolayer of carbon atoms arranged in a hexagonal lattice. The low-energy band structure of graphene can be approximated as two opposite cones located at two inequivalent Brillouin zone corners, and the point where the apexes of these two cones touch is called Dirac point. Near the Dirac point, where energies of electrons and holes are degenerate, the 2D energy dispersion relation is linear; electrons/holes behave like relativistic, massless Dirac particles. This band structure of graphene differs radically from the parabolic bands common to all previous 2D systems, leading to intriguing new phenomena. In this talk, I focus on two projects related to graphene that complement each other: magneto-transport measurements in high magnetic fields, and infrared optical studies of graphene. In the transport experiments, we investigate the distinctive half-integer quantum Hall effect in graphene and its Landau level (LL) splittings in the extreme quantum limit [1-3]. In the infrared experiments, we perform infrared transmission measurements in graphene at selected LL fillings [4,5]. Resonances between hole LLs and electron LLs (intraband transitions), as well as resonances between hole and electron LLs (interband transitions) are resolved. For both projects, we argue that manybody correlation of effectively massless Dirac Fermions provides considerable contributions to our experimental results

Tuesday, November 6, 2007; 1:30 p.m.; BRK 2001

Dr. Fredy R. Zypman

Professor, Yeshiva University

Department of Physics, New York

Abstract

Since its inception, Atomic Force Microscopy (AFM) has been consistently used to study biological systems. More specifically, during the last decade, AFM has been increasingly used to probe biological matter in physiological conditions, which naturally requires the AFM to work inside fluids. This poses two main problems: (a) image reconstruction algorithms need to incorporate the fluid dynamics and (b) new forces appear between the AFM tip and the sample in liquid that do not exist when imaging in vacuum or air. In this talk we concentrate on the second problem and present simple rules to evaluate tip-sample forces in liquids for useful AFM geometries. We use this theoretical background to understand experimental differences found when measuring cellular membrane adhesion with AFM and with the Surface Force Apparatus.

Brief Biography

Prof. Zypman is currently Professor of Physics at Yeshiva University, and a visiting Senior Scientist at Columbia University. His research interests span theoretical nanoelectronics, condensed matter physics, and statistical physics. He received a PhD in Physics from Case Western Reserve University, Cleveland, Ohio in 1988, and was Post Doctoral Associate at the University of North Carolina, Department of Electrical Engineering in 1991. He joined the University of Puerto Rico Department of Physics in 1991 and left in 2000 as a full professor. Professor Zypman received Best Papers Journal of Physics for “Evidence of Self Organized Criticality In Dry Sliding Friction”, Institute of Physics. He was honored by NASA for Excellence in NASA research in Puerto Rico and for contributions to NASA research and received a NASA Faculty Fellowship in 2002. He has more than 70 recent publications, 3 patent applications have been granted, and has 18 students in research projects.

Thursday, November 8, REFRESHMENTS 4:00PM, ME 254, Seminar 4:30PM, ME 256:

ABSTRACT: Homogeneous charge compression ignition (HCCI) in internal combustion engines is of considerable interest because of potential reductions in flame temperature and nitrogen oxide emissions. Unfortunately, HCCI combustion is inherently unstable due to an extreme sensitivity to initial charge conditions in the cylinder and exhibits high pressure rise rates, which limits operation at high load conditions. A proposed method to ensure coverage of the entire speed-load range is to operate in HCCI mode when load demand is low and switch to SI mode when load demand is high. In our research, the transition, and hence HCCI, is achieved with high levels of exhaust gas retained in the cylinder through manipulation of the intake and exhaust valve events. Unfortunately, this results in a strong coupling between successive cycles with small variations in the thermal and chemical composition of the retained exhaust gas leading to large variations in the combustion process. Recent results from our research have shown that the SI-HCCI mode transition is very unstable with high torque variations, high unburned hydrocarbon emissions, and potential engine stall. A detailed analysis of this transition region has identified patterns in successive combustion events which makes the onset of unstable conditions highly predictable and potentially avoidable with proper control adjustments. Our analysis has also identified a hybrid (or mixed-mode) combustion mode which is a combination of SI and HCCI combustion within a single cycle. This mode is thought to have the emissions benefits of HCCI without the penalty of higher pressure rise rates, providing an alternate operating mode when pure HCCI operation is not possible, such as at high load or when in-cylinder charge preparation is not sufficient to produce HCCI combustion. The hybrid combustion mode also has dynamic characteristics which appear to be conducive to control. We are currently developing low-order engine models to capture the phenomena observed in our experiments and for use in the development and evaluation of control methodologies.

BIO: Robert M. Wagner is a Senior Member of the Technical Staff at Oak Ridge National Laboratory and an Adjunct Professor at the University of Tennessee Knoxville. He received a Ph.D. in Mechanical Engineering from the University of Missouri-Rolla in 1999. Wagner is principal investigator of several programs related to achieving high efficiency clean combustion in light-duty and heavy-duty internal combustion engines. These activities involve the integration of many advanced technologies including the characterization and control of unstable combustion systems (e.g., lean SI, spark assisted HCCI), advanced combustion sensors, and post-combustion emissions controls. Wagner is the author or co-author of over 50 technical papers in the areas of combustion and controls.

ABSTRACT: As the electronics industry continues to develop small, highly functional, mobile devices, new methods of cooling are required to manage the thermal requirements of the not only the chip but the entire system. Comfortable skin temperatures, small form factors, and limited power consumption are just some of the challenges that current devices face. Microscale ionic wind engines are air cooling enhancement devices which operate based on the principles of electrohydrodynamic interactions. Air ions, generated by impact with electrons emitted from a cathode, are pulled through the air and collide with neutral air molecules causing a wind. In the presence of a bulk flow, an ionic wind can modulate the boundary layer at a wall and enhance heat transfer. Microscale ionic wind devices can be fabricated onto a chip or heat sink in areas of known high heat flux to enhance the cooling effects of a fan without adding significant volume to the overall package. Proof-of-concept, millimeter-scale experiments have demonstrated a more than 25 °C temperature drop and greater than 250% increase in local heat transfer coefficient with power consumption of only ~50 mW. In this presentation, the concept of ionic winds for electronics cooling will be presented. The challenges of scaling down the technology to the microscale will be discussed and current efforts to fabricate microscale devices will be covered. Additionally, detailed modeling of the microscale phenomena will be presented and preliminary results will be shown.

BIO: David received his B.S. in Mechanical Engineering from the University of Notre Dame in 2001 and his M.S. in Aerospace Engineering from the University of Cincinnati in 2004. David was a design and analysis engineer at G.E. Aviation (formerly G.E. Aircraft Engines) in Evendale, OH from 2001-2004 where also graduated from the Edison Engineering Development Program. David is currently a Ph.D. candidate in Mechanical Engineering at Purdue University, co-advised by Professors Timothy S. Fisher and Suresh V. Garimella. David’s research focuses on scaling down ionic winds for electronics cooling applications and he has contributed 2 archival journal publications (published or in review) and 3 papers to conference proceedings. Additionally, David conducted electronics cooling research at Intel Corporation during the summer of 2007.

ABSTRCT: Do you have a talk, a simulator, a white paper, or a homework assignment that might be useful for others in the nanotechnology research/education community? Put it online at nanoHUB.org. During this 2-hour crash course, we’ll show you just how easy it is to get your work online: Publish your PDF/DOC files within minutes; go from PowerPoint slides to a published presentation in just a few hours; go from Matlab scripts or Fortran code to a published simulation tool in just a few days. Why bother? Employers and tenure committees want to see what you’ve accomplished during your research. Imagine pointing to dozens of resources online, and quoting statistics about the hundreds or even thousands of users that you’ve reached with your science! Eat pizza and learn how to use nanoHUB.org as a publishing platform.

BIO: Michael McLennan received a PhD in 1990 from Purdue University for his dissertation on dissipative quantum mechanical electron transport in semiconductor heterostructure devices. He blended his expertise in physics with a love of software when he joined Bell Labs in 1992 to work on tools for semiconductor device and process simulation. He is co-author of Effective Tcl/Tk Programming and Tcl/Tk Tools. He also developed [incr Tcl], an object-oriented extension of Tcl, which is now used by thousands of developers worldwide on projects ranging from the TiVo digital video recorder to the Mars Pathfinder. Dr. McLennan joined Cadence Design Systems in 1998 as a Software Architect for their SimVision visualization and debugging environment. In 2004, he became a Senior Research Scientist at Purdue University, acting as the Software Architect for the Network for Computational Nanotechnology (NCN) and the nanoHUB.org web site. His latest project is the Rappture Toolkit, available at http://rappture.org.

The seminars should last approximately 45 minutes with 15 minutes for questions/comments. NSAC’s goals include a mixture of professors and graduate students presenting their research. Professors should plan on presenting an overview of their research at a level geared toward recruiting new grad students or reporting to a funding agency.

Please note that presentations will be videotaped and posted to the BNC website in Breeze format. Graduate students may present on research or on a “journal club” article. Remember that these seminars are a great opportunity to practice your prelim or thesis defense before presenting to your committee. If you are giving a talk at an upcoming conference, this is a great opportunity to practice your presentation here first. If your talk is short (15–20 minutes), pair up with another grad and you both can present one Thursday.

Interested parties should contact Annie Cheever; acheever@ecn.purdue.edu. If you have questions, please contact Annie or Kalapi Biswas (kgbiswas@purdue.edu, NSAC research awareness chair).

Abstract: Despite generation on generation of scaling, computer chips have remained essentially 2-dimensional. Improvements in on-chip wire delay, and in the total number of inputs and outputs has not been able to keep up with improvements to the transistor, and its getting harder and harder to hide it! 3D chip technologies come in a number of flavors, but are receiving lots of attention lately as a means of extending CMOS performance. Designing for three dimensions, however, forces us to look at formerly-two-dimensional integration issues quite differently. IBM as well as other companies and research institutions are developing ways of addressing these challenges. This talk will introduce major 3D concepts and IBM’s approach. A 3D “fly-through” movie of an actual IBM 3D design will be shown.

BIO: Kerry Bernstein is a Senior Technical Staff Member at the IBM T.J. Watson Research Center, Yorktown Hts., NY. He is currently Principal Investigator of IBM’s 3D Integration Program. Mr. Bernstein received the B.S degree in electrical engineering degree from Washington University in St. Louis, and joined IBM in 1978. He holds 50 US Patents, and is a co-author of 3 college textbooks and multiple papers on high speed CMOS. His interests are in the area of high performance / low power advanced circuits and technologies. Mr. Bernstein is an IEEE Fellow.

Date: Thursday, October 11, 2007
Time: 4:30 p.m.
Refreshments at 4 p.m. in Room 254
Place: Mechanical Engineering Building, Room 161

More information

Date: Friday, September 28, 2007
Time: 3:30 p.m. - refreshments
3:45 p.m. - Seminar
Place: MORGAN 121

PROFESSOR ARVIND RAMAN
School of Mechanical Engineering
Birck Nanotechnology Center
Purdue University

Understanding approach curves and scanned images in tapping mode AFM via VEDA

Monday, September 24, 2007
2:30 PM, EE 317

ABSTRACT: Properties of industrially useful substances are often anisotropic and performances of materials are dependent on the microstructure of the materials and the direction of external field. Although bulk single crystals generally give the best performance of a substance, they also have disadvantages in production cost, mechanical toughness, and compositional design freedom. Other approaches to extract the intrinsic properties of a substance are fabrication of textured ceramics. Texture engineering of ceramics has collected attentions especially in piezoelectrics, ferroelectrics, pyroelectrics, as well as electronic and ionic conductors. Exploiting self-texture is a unique way to fabricate textured thin films without using single crystal substrates. Templated grain growth using reactive or non-reactive seeds are effective method to fabricated highly textured bulk ceramics through powder processing. This method is especially useful to enhance properties of electronic materials with compositional restriction in terms of environmental compatibility. Examples are shown for lead-free piezoelectric ceramics and oxide thermoelectric ceramics textured by the reactive-templated grain growth processing. In situ conversion reactions of template particles were investigated by TEM and high-temperature XRD. Developed texture was examined by pole-figure XRD and EBSP. Introduction of Toyota CRDL and activities in materials research is also made prior to starting the main topic.

BIO: Toshihiko Tani received his B.S. in Metallurgy from University of Tokyo in 1980, his M.S. in Metallurgy from University of Tokyo in 1982 and a M.S. in Ceramic Science from University of Illinois in 1993, and his Ph.D. in Materials Science and Engineering from University of Illinois in 1994. Dr. Tani’s research interests are in synthesis and processing of functional ceramics; texture engineering of electronic ceramics; and single crystal growth of wide bank gap semiconductors. He has received the following honors: 2002 Japanese Society of Powder Metallurgy, Award for Innovatory Research; 2004 The American Ceramic Society, Corporate Environmental Achievement Award, and 2005 Ceramic Society of Japan, Award for Academic Achievements.

Monday, Sept. 17, 2007, 2:30 pm, EE317

Abstract: Using PETE one can evaluate any MOSFET like devices or any New Devices in terms of performance on Benchmark circuits. The input to the tool can be in terms of typical MOSFET parameters or in terms of I-V and C-V tables. The Benchmark circuits include minimum sized inverter, nand chain, norchain, 8-bit Full Adder, Ring Oscillator and Cascaded inverters driving a big load capacitance. Further, one can perform DC simulations on inverters and obtain voltage transfer characteristics (VTCs) and noise margin/ gain from the VTC. In this tutorial we will discuss how to use PETE for evaluating exploratory nano devices. We will further discuss the algorithms used, the interface and some caveats while using the tool.

Bio: Arijit Raychowdhury received his B.E. degree in 2001 in Electronics and Telecommunication engineering from Jadavpur University, Calcutta, India. Since 2002, he has been pursuing Ph.D. in Electrical and Computer engineering at Purdue University, IN. He has worked as an Analog Circuit Designer with Texas Instruments Inc., India (2002 to 2003) and with the Circuit Research Labs, Intel Corporation (summer of 2005 and 2006) pursuing design ideas with novel nano- devices. His research interests include device/circuit design for scaled silicon and non-silicon technologies. Mr. Raychowdhury has received academic excellence awards in 1997, 2000, and 2001, the Meissner Fellowship from Purdue University in 2002, the NASA INAC Fellowship in 2003 and the Intel PhD Fellowship Award in 2005. He has received Best Paper Awards at IEEE NANO 2003 and ISLPED, 2006. He holds six patents and has published over thirty articles in journals and refereed conferences.

Register at www.purdue.edu/rche/fall2007.

Network with colleagues and students in exploring Purdue’s multidisciplinary advances in some of the most challenging health issues of our time.

ABSTRACT: This is an informal, non-scientific, slide based presentation with the theme that in early times discoveries in physics and mathematics usually followed or were stimulated by practical engineering developments and needs. More often that not, so called “fathers of physics and mathematics” were practicing engineers. A prime example is Archimedes. The presenter has over the years done research on historical engineering topics as a sideline to his work in vibrations, acoustics and machinery dynamics, in collaborations with Professor Vernard Foley of the Purdue History Department. Together, they published a number of papers and are probably best known to wider audiences for their publications in Scientific American. The slide presentation traces engineering history starting with Egypt, through Greece and Rome into Europe from ancient times to roughly the renaissance. Influences of other cultures are acknowledged. Because of time limitations, the presentation is somewhat anecdotal and omits a number of important engineering developments.

Martin Giles will talk about Extending Moore’s Law in the Nanotechnology Era. Intel will host a pizza reception afterwards where you can network with other Intel employees and get any additional questions answered. Intel is hiring MS and PhD students for internships and full-time positions. Seeking grad students with backgrounds in: Chemistry, Chemical Engineering, Computer Engineering, Computer Science, Industrial Engineering, Electrical Engineering, Materials Science, Statistics, Mechanical Engineering, Physics