http://s.uconn.edu/meseminar04.01.22

Abstract: Matter (https://www.cell.com/matter) is a new materials science journal from Cell Press (our first issue was July ‘19). Matter is the third offering in the physical sciences from Cell Press, after the successful launches of Chem (2016) and Joule (2017), and an expanding physical sciences portfolio. Our goal is to provide a high impact publication in the field on par with Nature Materials. In this talk, the editor-in-chief, Steve Cranford, will outline the aims and scope of Matter, our internal scientific editorial team, describe our assessment process and outline our framing of materials science. We present our novel MAP scale for materials research progress assessment and provide tips in writing high impact papers and common pitfalls. Come learn about physical sciences at Cell Press and Matter!

Bio: A graduate from Memorial University (Canada), Stanford University (USA), and Massachusetts Institute of Technology (USA), Dr. Cranford was faculty at Northeastern University’s College of Engineering prior to accepting a new role as editor-in-chief for Matter. He has over 50 publications in the field of materials sciences in a range of high impact journals, including Nature and Advanced Materials, with expertise in the area of atomistic simulation, computational modeling, and nanomechanics, encompassing a variety of materials systems, from carbyne to copper to concrete. He would have preferred to have published in Matter, but it didn’t exist. Jumping to publishing in 2018, his goal is to not only make Matter a high impact title in materials science, but also be a key thought leader in academic publishing.

http://s.uconn.edu/meseminar4.8.22

Abstract: Overcoming endemic limitations of existing manufacturing processes can have long lasting socio-economic impacts. I will focus on three innovations that have such an impact. First, I will discuss our work on Intense Pulsed Light Sintering of nanoparticles. I will show how this process alleviates the scalability, damage, and device performance limitations that plague state-of-the-art approaches for manufacturing planar, flexible, conformal, and structural electronics. I will also discuss our discovery of an inherent self-damping behavior in the process, unexpected shape-dependent dynamics of nanoparticle sintering, and the first atomistics-informed scalable model of sintering in nanowire ensembles.

Secondly, I will describe a recent breakthrough in overcoming the throughput-resolution tradeoff that plagues material extrusion-based additive manufacturing (MatEx). I will show how coupling a new toolpath approach with our discovery of continuous material retraction and advancement breaks the above tradeoff, while enhancing economical access to diverse part sizes and geometries and enabling unprecedented resilience to tool failure. I will discuss key parametric trends in the process, new thermal models that reveal the unique temperature history, and potential collaborations with researchers in design and synthesis of materials and in machine learning based control.

Finally, I will describe a magnetics-controlled-plasma based approach to laser micromachining that goes beyond the limits of optical diffraction or wavelength specific-material absorption without modifying the substrate or using near-field techniques. I will discuss key considerations for machine design and process design; the wide materials capability of the process; and the potential to build collaborations in machine learning, control, and process monitoring.

Biographical Sketch: Dr. Rajiv Malhotra obtained his PhD in Mechanical Engineering from Northwestern University and joined Oregon State University as an assistant professor in 2014. He has been an assistant professor at Rutgers University since 2017 where he has established the Advanced Manufacturing Sciences Laboratory, funded by both federal and industry sources. His work has yielded 73 publications including in diverse journals such as Journal of Materials Processing Technology, Journal of Manufacturing Processes, Applied Materials and Interfaces, Advanced Functional Materials, Additive Manufacturing, Nanotechnology, and Sustainable Energy and Fuels. He has been a guest-editor for special issues in ASME and SME journals and is currently an associate editor for Manufacturing Letters, Journal of Manufacturing Processes, and Nature Scientific Reports. He is also a track chair in the ASME Manufacturing Science and Engineering Conference and a scientific committee member in the North American Manufacturing Research Conference. His research and service efforts were recognized by the 2017 Young Manufacturing Engineer Award from the Society of Manufacturing Engineers and the 2018 Associate Editor of the Year Award from the Society of Manufacturing Engineers. Dr. Malhotra is also passionate about integrating sustained mentorship with challenging research opportunities to create a systemic pipeline of students from the undergraduate to the graduate levels.

http://s.uconn.edu/meseminar4.15.22

Abstract: Two-phase internal flows in microgaps with passage hydraulic diameters of 100 um – 1,000 um are of interest in three-dimensional heterogeneous electronics, transport electrification, and portable microsystems.  To enhance heat transfer coefficients in these configurations, structured surfaces are often employed.  Understanding of two-phase flow and thermal transport in such configurations continues to be an active area of research.  This talk will present recent computational and experimental results from investigations of two-phase forced convection, capillary assisted transport, and capillary flow driven passive transport in structured microgaps.  Experimental results include the use of high speed visualizations to elucidate flow regimes, and temperature measurements for heat transfer characterization.  Computations of two-phase flows have been performed using the volume of fluid approach.  While many challenges remain, experimentally validated modeling of such two-phase flows presents a promising approach for understanding the thermal transport in these configurations, and employing them in thermal management in emerging applications.

Biographical Sketch: Yogendra Joshi is Professor and John M. McKenney and Warren D. Shiver Distinguished Chair at the G.W. Woodruff School of Mechanical Engineering at the Georgia Institute of Technology.  His research interests are in multi-scale thermal management.  He is the author or co-author of nearly four hundred and fifty publications in this area, including nearly two hundred journal articles. He received his B. Tech. in Mechanical Engineering from the Indian Institute of Technology (Kanpur) in 1979, M.S. in Mechanical Engineering from the State University of New York at Buffalo in 1981, and Ph.D. in Mechanical Engineering and Applied Mechanics, from the University of Pennsylvania in 1984.  He has held visiting faculty appointments at Stanford University, Katholieke Universiteit Leuven, and Xi’an Jiaotong University.  He is an elected Fellow of the ASME, the American Association for the Advancement of Science, and IEEE. He was a co-recipient of ASME Curriculum Innovation Award (1999), Inventor Recognition Award from the Semiconductor Research Corporation (2001), the ASME Electronic and Photonic Packaging Division Outstanding Contribution Award in Thermal Management (2006), ASME J. of Electronics Packaging Best Paper of the Year Award (2008), IBM Faculty Award (2008), IEEE SemiTherm Significant Contributor Award (2009), IIT Kanpur Distinguished Alumnus Award (2011), ASME InterPack Achievement Award (2011), ITherm Achievement Award (2012), ASME Heat Transfer Memorial Award (2013), and AIChE Donald Q. Kern Award (2018).