Category: Seminars

ME-EM Graduate Seminar: Control of Powertrain Systems

ME-EM Graduate Seminar: Thursday, Oct. 3, 2013 4:00 – 5:00 p.m. Room 112, ME-EM Bldg. Professor Anna G. Stefanopoulou, Mechanical Engineering, University of Michigan

Title: Control of Powertrain Systems at the High Efficiency Limit

The protagonist of this story is a gasoline engine with a confused identity, often called DiesOtto, featuring unstable behavior and a potential for high-efficiency. Several independent short stories on stressed-out batteries and dead-ended fuel cells will highlight the challenges in understanding, modeling, and controlling highly efficient power conversion on-board a vehicle.

Anna G. Stefanopoulou is a professor of Mechanical Engineering at the University of Michigan and the Director of the Automotive Research Center a university-based U.S. Army Center of Excellence in Modeling and Simulation of Ground Vehicles. She obtained her Diploma (1991, Nat. Tech. Univ. of Athens, Greece) in Naval Architecture and Marine Engineering and her Ph.D. (1996, University of Michigan) in Electrical Engineering and Computer Science. She was an assistant professor (1998-2000) at the University of California, Santa Barbara, a technical specialist (1996-1997) at Ford Motor Company and a visiting professor (2006) at ETH, Zurich. She is an ASME and an IEEE Fellow, the Inaugural Chair of the ASME DSCD Energy Systems Technical Committee, a member of the SAE Dynamic System Modeling Standards Committee and a member of a U.S. National Academies committee on Vehicle Fuel Economy Standards. She has co-authored a book on Control of Fuel Cell Power Systems, 10 US patents, 5 best paper awards and 200 publications on estimation and control of internal combustion engines and electrochemical processes such as fuel cells and batteries.


ME-EM Graduate Seminar: Hands-On Education with The Michigan Tech Mobile Lab

ME-EM graduate seminar guest is Jeremy Worm, a Research Engineer and Instructor in the Department of Mechanical Engineering – Engineering Mechanics at Michigan Tech. His presentation is entitled ‘Hands-On Education with The Michigan Tech Mobile Lab’ and will be in 112 MEEM at 4:00 PM.

The Michigan Tech Mobile Lab is a one-of-a-kind educational facility. The lab is used for providing hands-on discovery based educational experiences. As such, the lab is used for teaching hands-on college courses, professional short courses, and STEM outreach. With light and heavy duty ground vehicles, powertrain test cells, a chassis dynamometer, benchtop activities, and advanced instrumentation systems, the lab can be used for a wide range of engineering subjects. This seminar will provide an overview of the lab, its capabilities, and will look at the specifics of one of the hands-on experiments students conduct in the lab.

Jeremy Worm, is a Research Engineer and Instructor in the Department of Mechanical Engineering – Engineering Mechanics at Michigan Tech, where he received his BS and MS degrees. Prior to joining the Michigan Tech Staff, Jeremy was a Senior Engineer at GM Powertrain. At GM Jeremy focused on combustion analysis, development of variable valve timing systems and operational strategies, and was the Lead Development Engineer for a new engine in a hybrid vehicle. At Michigan Tech, Jeremy remains active in the field of powertrain research, has developed and teaches several courses in the area of powertrain research and hybrid vehicles, and directs the Michigan Tech Mobile Lab. Jeremy is a licensed Professional Engineer, has authored or co-authored 22 publications, has 2 patents, has received a best paper award, and has been inducted into the Michigan Tech Academy of Teaching Excellence.


MEEM Graduate Seminar: Low Temperature Combustion Engines

Samveg Saxena, Ph.D, Lawrence Berkeley National Laboratory and the University of California at Berkeley
Title: Fundamental Phenomena Affecting Low Temperature Combustion Engines High Load Limits & Strategies for Extending These Limits; Thursday, Sept. 19, 2013 4:00 – 5:00 p.m. Roo m 112, ME-EM Bldg.

Low temperature combustion (LTC), including HCCI, is one of the most promising directions for high efficiency and low emission engines for vehicles of the future. This seminar presents an overview of a recent comprehensive review article in the journal “Progress in Energy and Combustion Science” which can be found at: http://dx.doi.org/10.1016/j.pecs.2013.05.002

The article provides a thorough review of fundamental phenomena governing the performance of LTC engines and uses this as a foundation to discuss emissions characteristics, high load operating limits, and recent research on promising strategies to extend high load limits. Promising future research directions in LTC engine technology and gaps in current literature are also discussed.

Additionally, an overview of the vehicle powertrain research program at Lawrence Berkeley National Laboratory and UC Berkeley will be discussed to provide a foundation to explore prospective research collaborations between LBNL and MTU faculty and students.

Dr. Saxena is a research scientist at Lawrence Berkeley National Laboratory (LBNL) and UC Berkeley where he leads several research programs in vehicle electrification and predicting electricity grid impacts from EVs. Sam completed his Ph.D in Mechanical Engineering at UC Berkeley in 2011 where he led several studies on innovative engine technologies for higher efficiency combustion, including LTC, microwave-assisted spark ignition, and cylinder deactivation strategies. Using this experience, Dr. Saxena has provided the technical foundation to secure over $2 Million in engine and powertrain research funding from the US DOE, California Energy Commission and other agencies. In early 2012, Dr. Saxena joined LBNL working on modeling of vehicle powertrain systems. Prior to beginning his Ph.D, Dr. Saxena worked in industry on engine and vehicle powertrain research at the Toronto-based companies: Magna Powertrain Engine Technologies Group, and Multimatic Technical Center. Dr. Saxena has been recognized in the Canadian House of Commons for his leadership excellence and has several awards for his demonstrated excellence in teaching and research, including the NSERC Canada Graduate Scholarship, and serves as a reviewer, session organizer, and editorial board member for leading conferences and journals in combustion, engines and powertrain technologies. After hours, Sam enjoys trail runs in the hills around LBNL.


MEEM Graduate Seminar: Cooling of Embedded Electronics

Dr. Frank Kulacki, Professor of Mechanical Engineering at the University of Minnesota will be the ME-EM graduate seminar guest speaker for Thurs., Sept. 12 in 112 MEEM at 4:00 His presentation is entitled ‘Cooling of Embedded Electronics – Flow Boiling Is the Key to High Power Density’. He will also include the results of a survey of the ASME Heat Transfer Division.

Title: Cooling of Embedded Electronics – Flow Boiling Is the Key to High Power Density

The performance of embedded airborne electronics and computers is nearing a thermal limit. Devices and systems are now in development that will push heat transfer requirements to power densities greater than 1 KW/cm3 and average heat flux greater than 1 KW/cm2. Cooling techniques based on single phase forced convection cannot meet these requirements. The emergence of three-dimensional computing packages makes heat rejection even more challenging. This seminar reports measurements of heat transfer in flow boiling in short, symmetrically heated narrow gap channels. This geometry emulates the basic configuration of electronic devices envisioned in high power density embedded computing. Watt densities of 1 KW/m3 are considered, and it is demonstrated that sub-cooled flow boiling can achieve thermal regulation and maintain average temperatures below a 95 oC operating limit. Our measurements characterize heat transfer in a single pair of heaters and a set of three in line heat pairs. For the latter, uniform and non-uniform power density are addressed. Coolants investigated are water and NovecTM 7200 and 7300. Inlet Reynolds numbers range from 250 to 1200, Weber numbers from 2 to ~18, and boiling numbers from O(10-4) to O(10-3). Exit quality can reach 30 percent in some cases. Overall heat transfer coefficients of 40 kW/m2K are obtained. Pressure drops
for either experimental configuration are well within the capabilities of the airborne computer systems. Correlations for heat transfer are developed and generalized, and a systems analysis is suggested that will point toward a developmental path to externalized cooling approaches. At the conclusion of the technical presentation, some comments will be offered on the results of national survey conducted by the ASME Heat Transfer Division on the emergent trends in heat transfer engineering, research and education.

Dr. Frank Kulacki, Professor of Mechanical Engineering at the University of Minnesota, received his degrees in mechanical engineering at the Illinois Institute of Technology and the University of Minnesota. His research/interests include coupled heat and mass transfer in porous media, two-phase flow in micro-channels, natural convection heat transfer, heat transfer in metal foams, hybrid renewable energy systems, thermal energy storage technology, energy policy, management of technology, and the adaptation of computer-based technologies in engineering education. To date, he has 163 technical articles, 14 book chapters/review articles, 34 educational/professional articles, 28 technical reports, edited 7 books/conference volumes, two Springer monographs and has advised 20 doctoral, 43 masters, and 13 undergraduate research scholars. As the department chair at the University of Delaware, the dean of engineering at the Colorado State University and the dean of the Institute of Technology (now the College of Science and Engineering) at the University of Minnesota, he initiated and expanded computer-aided engineering and technology-based instructional activities, increased research funding, established new multidisciplinary degree programs, research initiatives, centers, and specialized research facilities. He chaired the Heat Transfer Division of the American Society of Mechanical Engineers, the ASME Task Force on Graduate Education, and the Education Advisory Group of the National Society for Professional Engineers. He served on the ASME Vision 2030 project which addressed the body of knowledge for mechanical engineers in the 21St Century, the ASME Board on Professional Development, the Board on Engineering Education, the Board of the Center for Education, the NSPE Task Force on Education and Registration, the DOE Peer Review Panel on Thermal and Hydrological Impacts of the Yucca Mountain Repository, and as the director of graduate studies for the MS in Management of Technology program at Minnesota. He has lectured on energy policy and related issues in the MOT program and at the Hubert H. Humphrey Institute for Public Affairs.

Dr. Kulacki’s advisory board experience includes the engineering programs at Swarthmore College, the University of Kentucky, the University of Maryland/Baltimore County, and Florida International University. From 1998 – 2001 he was an ASME Distinguished Lecturer. He has served as the Executive Director of the Technology-Based Engineering Education Consortium, an initiative of the William C. Norris Institute.

He is a Life Fellow of ASME and the American Association for the Advancement of Science (AAAS). At the University of Minnesota, he received the ASME Distinguished Service Award and the George Taylor Distinguished Service Award of the Institute of Technology.


Graduate Seminar: Gregory M. Odegard

Professor Gregory M Odegard, of the Department of Mechanical Engineering – Engineering Mechanics
Michigan Technological University will present the Graduate Seminar, Thursday, Sept. 5, 2013 4:00 – 5:00 p.m. Room 112, ME-EM Bldg.
Dr. Gregory M. Odegard will present an overview of presentation guidelines will be given. This will cover suggested presentation content, formatting, organization, and style. Examples will be given of poor presentation slides.is an Assistant Professor in the Department of Mechanical Engineering – Engineering Mechanics, and an Adjunct Assistant Professor in the Department of Materials Science and Engineering. He received his B.S. in Mechanical Engineering from the University of Colorado at Boulder, and his M.S. and Ph.D. in Mechanical Engineering from the University of Denver. He received the 2008 Ferdinand P. Beer and E. Russell Johnston Jr. Outstanding New Mechanics Educator Award (awarded by the American Society of Engineering Education), the 2008 Outstanding Graduate Mentor Award (awarded by the Michigan Tech Graduate Student Council), the 2006 HJE Reid Award (awarded by NASA Langley Research Center), and the 2005 Boeing/SDM Best Paper Award (awarded by the American Society of Mechanical Engineers). Dr. Odegard is currently serving as the Chair of the Structures and Materials Committee of the American Society of Mechanical Engineers (ASME).


MEEM Graduate Seminar: Seeing the World with Neutron Vision

Mechanical Engineering – Engineering Mechanics Graduate Seminar: Thurs., April 25 at 4:00 in 112 MEEM.

Dr. Daniel S. Hussey from the National Institute of Standards and Technology will be the ME-EM guest speaker for Thurs., April 25 at 4:00 in 112 MEEM. His presentation is entitled ‘Seeing the World with Neutron Vision’.

Dr. Daniel S. Hussey is a research scientist at the National Institute of Standards and Technology where his primary research is on neutron optics including neutron imaging of proton exchange membrane fuel cells. Dr. Hussey started at NIST as a National Research Council Postdoctoral Fellow in 2004. Dr. Hussey earned a PhD in physics from Indiana University in Bloomington, IN in 2003 where he used dense samples of polarized 3He in polarized neutron reflectometry studies of magnetic thin films. Dr. Hussey earned his bachelor of science in physics from the University of New Hampshire in 1999. Dr. Hussey has authored or coauthored over 50 peer-reviewed journal articles and book chapters and was awarded the Presidential Early Career Award for Scientist and Engineers in 2010.

Abstract: “Seeing the World with Neutron Vision”

Neutrons primarily interact with matter via the strong nuclear force (as opposed to the electron density) and so provide a complementary view of world to more conventional probes of matter.

In particular, neutrons have a very high sensitive to hydrogen while being very insensitive to common metals such as aluminum. This has enabled neutron imaging to play a key role in understanding the water transport in hydrogen fuel cells. Neutrons can also be treated as waves and it is possible to construct a neutron Talbot-Lau interferometer to obtain phase and darkfield images which can increase the contrast for small variations in material density or porosity. An ongoing challenge in any neutron scattering or imaging measurement is the inherently low neutron intensity as compared to what is possible at modern x-ray synchrotrons. This is partly due to the difficulty in focusing neutrons as the refractive index differs from one by only 1-10 ppm. A new reflection base lens technology shows great promise to create the world’s first practical neutron microscope. In this talk, I’ll discuss how neutron imaging has benefited fuel cells and how it might be useful for lithium batteries, give an overview of the Talbot-Lau interferometer, and introduce the idea of the neutron microscope.


MEEM Graduate Seminar: Using Nonlinear Torsional Vibration Absorbers to Improve Automotive Fuel Economy

Mechanical Engineering – Engineering Mechanics Graduate Seminar: Thurs., April 18 at 4:00 in 112 MEEM. Professor Steven W. Shaw, Department of Mechanical Engineering, Michigan State University
Title: “Using Nonlinear Torsional Vibration Absorbers to Improve Automotive Fuel Economy”

Steve Shaw is a University Distinguished Professor in the Department of Mechanical Engineering at Michigan State University. He received an AB in Physics (1978) and an MSE in Applied Mechanics (1979) from the University of Michigan and a PhD in Theoretical and Applied Mechanics (1983) from Cornell University. His current research interests are in dynamical systems and mechanical vibrations, including mirco/nano-scale resonators with sensing and signal processing applications, and nonlinear vibration absorbers with automotive applications. He has held visiting appointments at Cornell University, the University of Michigan, Caltech, the University of Minnesota, the University of California-Santa Barbara, and McGill University. Steve currently serves as an Associate Editor for the SIAM Journal on Applied Dynamical Systems, Nonlinear Dynamics, and the ASME Journal of Vibration and Acoustics. His work has been supported without interruption by the US NSF since 1984, and by the US Department of Defense and industrial sources. He is a Fellow of ASME and recipient of several honors, including the SAE Arch T. Colwell Merit Award, the Henry Ford Customer Satisfaction Award, the ASME Henry Hess Award, and he will receive the ASME N. O. Myklestad Award in 2013.

Topic: Using Nonlinear Torsional Vibration Absorbers to Improve Automotive Fuel Economy

Abstract:
A number of approaches used for improving automotive fuel economy result in increased levels of powertrain torsional vibration; these include cylinder deactivation, low-speed boosting, and low-speed torque converter lockup. One can maximize the effectiveness of such strategies by managing torsional vibrations, which allows access to more efficient operating conditions.

Several manufacturers are considering the use of centrifugal pendulum vibration absorbers, which are widely used in light aircraft engines, for this purpose. These absorbers attenuate torsional vibrations at a given engine order, and they are most effective when lightly damped and allowed to operate at large amplitudes of oscillation. Hence, their design requires an understanding of the dynamic response of a multi-degree-of-freedom nonlinear system driven near resonance. Some nonlinear effects can be designed into the absorbers to provide enhanced performance, while others are detrimental to their function. In this work we consider the dynamics and performance of rotors fitted with multiple absorbers, a nonlinear dynamical system with special symmetries that are central to its behavior. We show how one can systematically account for these effects to develop analytical and computational tools for the design of absorber systems that are effective over a wide range of engine torques and speeds. The presentation will describe modeling, predictive analysis, controlled experiments,
automotive engine testing, and outstanding challenges related to these vibration absorbers.

This line of research has been carried out jointly with Professors Brian Feeny and Alan Haddow and several graduate students at MSU, Dr. Bruce Geist at Chrysler Group LLC, and Jeff Chottiner, John Brevick, and Victor Borowski at Ford Motor Company. Financial support has been provided by NSF, Chrysler, and Ford.


MEEM Graduate Seminar: Apr 11

Mechanical Engineering – Engineering Mechanics Graduate Seminar: Thurs., April 11 at 4:00 in 112 MEEM.
Dr. Mahdi Shahbakhti, an assistant professor of Mechanical Engineering and Director of the Energy Mechatronics Laboratory at Michigan Technological University, will be the graduate seminar speaker for Thursday, April 11 at 4:00 in 112 MEEM. The presentation is entitled ‘Low Temperature Combustion Engines: Opportunities, Challenges, and Solutions’.

Dr. Mahdi Shahbakhti is an assistant professor of Mechanical Engineering at Michigan Technological University, where he conducts research in the area of controls and energy. He is currently the director of Energy Mechatronics Laboratory (EML) at MTU. Prior to joining the faculty at Michigan Tech, Shahbakhti was a post-doctoral scholar at the Vehicle Dynamics & Control Laboratory in the University of California-Berkeley (2010-2012). He received his PhD in Mechanical Engineering from University of Alberta in Canada in 2009. He worked several years on control of dynamic systems in the automotive (2001-2004), robotic (2000-2001), and HVAC (1998-2000) industries. An ASME and SAE member, Shahbakhti has been doing research in the area of powertrains and controls for the past 13 years. His research has centered on developing dynamical models and novel control techniques with application in powertrain control, utilization of alternative/renewable fuels, reduction of vehicular emissions, and hybrid electric vehicles. He is the author of over 50 refereed publications in the field of powertrain, dynamic systems and controls. Dr. Shahbakhti is an active member of ASME Dynamic Systems & Control Division, serving as the trust area leader and executive member of the Energy Systems technical committee and as a member of the Automotive and Transportation Systems technical committee, chairing and co-organizing sessions in the areas of modeling, fault diagnosis, and control of advanced fuel and combustion systems.

Title: “Low Temperature Combustion Engines: Opportunities, Challenges, and Solutions”

Abstract: In the past decade, Low Temperature Combustion (LTC) engines have captured a lot of attention as a promising future engine technology since they have negligible nitrogen oxides (NOx) and soot emissions with a thermal efficiency over 50%. Fuel saving gains up to 30% compared to conventional engines has made LTC engines very attractive for car manufacturers. Some of major car manufacturers (e.g. GM, VW, Mercedes-Benz, and Honda) have already built functioning prototype HCCI engines but stability and control of the LTC combustion process continues to be the major barriers to commercial implementation. Different versions of LTC engines have been investigated in the past several years. Homogeneous Charge Compression Ignition (HCCI) engines are well recognized LTC engines. This talk centers on HCCI engines and presents some recent advanced research results in this area. Control of HCCI ignition timing, particularly for a wide load and speed range, is recognized as the most challenging problem in HCCI engines. Sensitivity to charge initial conditions and the lack of a direct method to initiate ignition make it difficult to control cyclic variations of HCCI ignition timing. Boundaries of high cyclic variations limit HCCI high and low load operation ranges. Model-based control of HCCI engines is a promising solution to tackle HCCI challenges and will be discussed in this presentation.


ME-EM Graduate Seminar: Apr 4

Mechanical Engineering – Engineering Mechanics Graduate Seminar: Thurs., April 4 at 4:00 in 112 MEEM. Greg Shaver, associate professor of Mechanical Engineering at Purdue University, will be the ME-EM graduate seminar speaker for Thursday, April 4 at 4:00 in 112MEEM. His presentation is entitled ‘Model-Based Engine Algorithm Development for Control and Virtual Sensing’.

Greg Shaver is an associate professor of Mechanical Engineering at Purdue University. He is also a graduate of Purdue University’s School of Mechanical Engineering, having obtained a Bachelor’s degree with highest distinction, and holds a Masters degree and a Ph.D. in Mechanical
Engineering from Stanford University. His research interests and background include the modeling and control of advanced combustion processes. Greg is an active member of ASME, participating in the Dynamic Systems and Controls Division and the Automotive and
Transportation Systems Panel. He is an associate editor for the IFAC Control Engineering Practice and ASME Journal of Dynamic Systems, Measurement and Control journals, and is an awardee of the Kalman award for the best paper published in the Journal of Dynamic Systems,
Measurement, and Control, and is a recent awardee of the 2011 SAE Max Bentele Award for Engine Technology Innovation.

“Model-Based Engine Algorithm Development for Control and Virtual Sensing”

Abstract: Greg is an associate professor of Mechanical Engineering at Purdue University who has developed a research program focused on developing generalizable, experimentally validated, model-based estimation and control strategies to enable: i.) advanced high efficiency, low emission IC engine combustion strategies, and ii.) clean and efficient combustion of domestically available alternative fuels. Dr. Shaver’s ongoing research efforts include: Physics-based, closed-loop estimation and control of variable biodiesel/diesel blends Dr. Shaver’s students have demonstrated that closed-loop control can be used to eliminate the 30+% increase in biodiesel-induced NOx, and increasing efficiency, while retaining significant particulate matter (PM) reductions (> 50%) with variable biodiesel blend fractions. Specifically, through a combination of: i.) a change of closed-loop control variables (combustible oxygen mass fraction (COMF) instead of exhaust gas recirculation fraction, and injected
fuel energy instead of injected fuel mass), and ii.) model-based biodiesel blend estimation; the NOx increases for any biodiesel blend or feedstock can be eliminated in a generalizable way, without the need for additional engine calibration. This strategy was derived from a fundamental understanding of the impact on combustion of the presence
of oxygen in, and lower energy content of, biodiesel derived from any feedstock. Modeling and estimation of next generation, piezo-electric fuel injection systems The dynamic response capabilities of piezo-electric actuators are superior to solenoids, allowing: 1) a 65% reduction
injector flow rate response during convention injection events, and 2) realization of complex injection “rate shaping” – to enable promotion and control of advanced combustion strategies. Dr. Shaver’s research team has developed generalizable model-based strategies for estimating the fuel injection rate, an un-measurable quantity on-engine, for use
during closed-loop control on both a cycle-to-cycle, and “within-a-cycle” basis. Estimated injection quantities exhibit errors less than 5%, while estimated injection pulse duration and separation are within 10×10-6 seconds. Variable Valve actuation to enable highly efficient compression ignition engines Advanced mode combustion and more efficient gas exchange, enabled via variable valve actuation (VVA) and closedloop
control, are projected to allow an increase in the brake thermal efficiency (BTE) of compression ignition engines to 55+% (today’s most efficient engines have BTEs of ~40%). VVA breaks the kinematic link between the piston and the intake and exhaust valves, providing flexibility in the valve closure/opening timing and lift – allowing more precise manipulation of the in-cylinder reactant (fuel, oxygen) concentrations, temperature, mixing, and amount of compression, both prior to, and during the combustion process. Dr. Shaver’s students have dynamically modeled, and developed closed-loop estimation (i.e., “virtual sensing”) and control strategies for, compression ignition engines incorporating VVA. As in all of his team’s research efforts, there is a heavy emphasis on the experimental validation/demonstration of all models and algorithms.


MEEM Graduate Seminar: Mar 28

Mechanical Engineering – Engineering Mechanics Graduate Seminar: Thurs., Mar. 28 at 4:00 in 112 MEEM. Title: “Scalable Nanomanufacturing for Energy Storage and Conversion Based on High-Voltage Electrophoretic Deposition”
Sunand Santhanagopalan, Graduate Student, Mechanical Engineering – Engineering Mechanics Department, Michigan Technological University

Sunand Santhangopalan is currently a doctoral candidate at the Department of Mechanical Engineering – Engineering Mechanics of Michigan Tech. After he joined Michigan Tech in January 2008, Mr. Sunand became part of the Multi-Scale Energy Systems Laboratory (MuSES Lab), advised by Dr. Dennis Meng, to work on various
research projects related to scalable micro- and nanotechnology for energy and sustainability. The research and education activities of MuSES Lab have been funded by NSF, ACS and US DoE. The work undertaken during his doctoral studies have resulted in papers published in journals like ACS Nano, Langmuir, and Key Engineering Materials.

Title: Scalable Nanomanufacturing for Energy Storage and Conversion Based on High-Voltage Electrophoretic Deposition

Abstract: Nanomaterials can significantly enhance many types of energy storage and conversion devices by providing huge surface reaction area, short diffusion paths, as well as excellent mechanical, electrical and electrochemical properties. However, it has been realized that the exciting performance of nanomaterials demonstrated in lab-scale experiments can lose its edge if the morphology cannot be well controlled and economically scaled up for macroscopic systems.
Accordingly, scalable and sustainable nanomanufacturing has been identified as a critical national research need by NSF, DOE, NIST and other federal agencies. In this talk, a roomtemperature, scalable process will be introduced to deposit vertically-aligned nanoforests of 1D nanoparticles (e.g., carbon nanotubes and MnO2 nanorods) on large, flexible conductive surfaces in a continuous roll-to-roll-printing manner. The deposition process, named high-voltage electrophoretic deposition (HVEPD), has been enabled by three key elements: polarization by
high voltage for alignment, low dispersion concentration of the nanoparticles to avoid aggregation, and simultaneous formation of a holding layer by electrodeposition. A recentlyreported supercapacitor with HVEPD nanoforests not only achieved the record-high power density among MnO2-based systems, but also broke a common perception that reductionoxidation (redox) capacitors have to sacrifice power density to achieve higher energy density than electric double layer capacitors. The talk will also go into good practices and details of supercapacitor testing. The process also shows the capability to tune surface wettability, to
obtain superhydrophobic surfaces without any polymer coating and stable superhydrophilic surfaces. The deposition of superhydrophilic antifouling coatings on Microelectrode Arrays for neuron growth will be introduced. The talk will be concluded with future research directions on scalable nanomanufacturing of fractal nanoparticles and 3D batteries, as well as discuss the future direction for supercapacitor research.