[cid:image004.jpg@01D685C0.EB336F80] The BNC Virtual Faculty Seminar Series is designed to provide faculty a platform to present an overview of their research and the opportunity for collaborative discussion with other BNC faculty and researchers across six colleges and 15 academic units. Xiulin Ruan Professor, School of Mechanical Engineering November 19th, 2020 | 12:00pm Join Zoom: https://purdue-edu.zoom.us/j/93857631004 Title: Pushing Boundaries of Thermal Transport and Sustainable Energy: From First Principles Predictions to Scalable Applications Abstract: This talk will overview our recent innovations in thermal transport and sustainable energy, by pushing the boundaries ranging from fundamental first principles predictions to scalably manufactured systems. The first part of the talk will cover predictive first principles and molecular dynamics simulations of thermal conductivity and optical (or thermal radiative) properties. In particular, we establish four-phonon scattering as an unexpected significant mechanism affecting thermal conductivity of nearly all materials at high temperature, and 2D materials, low thermal conductivity materials, and certain high-thermal conductivity materials even at room temperature.1 In addition, four-phonon scattering can have significant or leading role in determining infrared optical properties of dielectrics.2 For complex crystals, the conventional phonon mean free path concept is insufficient, and we propose a two-phonon transport theory to better describe their thermal transport.3 We further show that machine learning can be used to dramatically accelerate the predictive design of energy nanomaterials.4 The second part of the talk will cover our development of the first commercial-like particle-matrix radiative cooling paint that can cool below the ambient temperature under direct sunlight.5 It is achieved via several approaches distinct from commercial paints: the use of the wide bandgap CaCO3 fillers, a high particle volume concentration of 60%, and a broad size distribution. Radiative cooling paints can have broad implications from saving energy to combatting climate change.6 The talk will close by exploring future directions and collaboration opportunities. 1. Feng et al., Phys. Rev. B 96, 161201(R) (2017)<https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.161201>. 2. Yang et al., Phys. Rev. B 101, 161202(R) (2020)<https://journals.aps.org/prb/abstract/10.1103/PhysRevB.101.161202>. 3. Luo et al., Nat. Commun. 11, 2554 (2020)<https://www.nature.com/articles/s41467-020-16371-w>. 4. Chowdhury et al., Nano Energy 69, 104428 (2020)<https://www.sciencedirect.com/science/article/abs/pii/S2211285519311449>. 5. Li et al, Cell Rep. Phys. Sci. 1, 100221 (2020)<https://www.sciencedirect.com/science/article/pii/S2666386420302368>. 6. BBC NEWS<https://www.bbc.com/news/science-environment-54632523> [cid:image002.jpg@01D6BC46.697A8CA0]Bio: Dr. Xiulin Ruan is a professor in the School of Mechanical Engineering and Birck Nanotechnology Center at Purdue University. He received his B.S. and M.S. from the Department of Engineering Mechanics at Tsinghua University, in 2000 and 2002 respectively. He then received an M.S. in electrical engineering in 2006 and Ph.D. in mechanical engineering in 2007 from the University of Michigan at Ann Arbor, before joining Purdue. His research and teaching interests are in predictive simulations, scalable manufacturing, and multiscale characterizations of thermal transport materials and systems. He received the NSF CAREER Award, Air Force Summer Faculty Fellowship, ASME Heat Transfer Division Best Paper Award, the inaugural School of Mechanical Engineering Outstanding Graduate Student Mentor Award, and was named a University Faculty Scholar of Purdue University and an ASME Fellow, among his honors. He currently serves as an associate editor for ASME Journal of Heat Transfer. Upcoming BNC Virtual Faculty Seminars, Fall 2020: Date Faculty Title 9/10/20 Ali Shakouri, Director of Birck Nanotechnology Center Overview of SMART Industry Consortium 9/17/20 Luna Lu, Professor of Civil Engineering - *Note time change* (10am - 11am): Co-Hosted with ECE Nanotechnology for Energy Harvesting and Sensing Applications 9/24/20 Alex Ma, Assistant Professor of Physics and Astronomy Superconducting circuits for quantum simulation and quantum information sciences 10/01/20 Hadiseh Alaeian, Assistant Professor of Electrical and Computer Engineering atom-Nanophotonics at low dimensions 10/08/20 Jianguo Mei, Assistant Professor, Department of Chemistry Semiconducting Polymers: A Journey from Scientific Curiosity to Technology Commercialization 10/15/20 Chen-Lung Hung, Assistant Professor of Physics and Astronomy Engineering atom-nanophotonics hybrid lattices 10/22/20 Chi Hwan Lee, Assistant Professor of Biomedical Engineering and Mechanical Engineering Sticker-Like Flexible Sensors for Wearable Healthcare Applications 10/29/20 Ryan Wagner, Research Assistant Professor, School of Mechanical Engineering Atomic force microscopy as a tool for multiphysics nanoscale characterization 11/5/20 Arnab Banerjee, Assistant Professor of Physics and Astronomy Co-design towards exotic spin-based systems and devices 11/12/20 Krishna Jayant, Professor of BME - *Note time change* (10am - 11am): Co-Hosted with ECE 11/19/20 Xiulin Ruan, Professor, School of Mechanical Engineering First Principles and Machine Leaning Predictions of Thermal and Optical Properties, and the Developments of Radiative Cooling Paints Spring 2021 Schedule: Date Faculty Title 2/4/21 Yi Xie, Assistant Professor, School of Nuclear Engineering Degradation of Structural Materials and Fuels in Nuclear Systems 2/11/21 Letian Dou, Assistant Professor, Davidson School of Chemical Engineering Organic-Perovskite Hybrid Quantum Wells, Heterostructure, and Optoelectronics 2/18/21 Nikhilesh Chawla, Ransburg Professor, School of Materials Engineering 2/25/21 Sorin Adam Matei, Associate Dean of Research and Graduate Education, College of Liberal Arts, Professor of Communication, Brian Lamb School of Communication Team Science - what it is, how it works, and why it does not always work the way we want it to work 3/4/21 David Cappelleri, Associate Professor of Mechanical Engineering Microrobotics Research Highlights 3/11/21 Stylianos Chatzidakis, Assistant Professor, School of Nuclear Engineering 3/18/21 Reading Day 3/25/21 Tyler Tallman, Assistant Professor, School of Aeronautics and Astronautics 4/1/21 4/8/21 4/15/21 4/22/21 4/29/21 Dead Week 5/6/21 Finals Week Thanks! Jaime Turner Lead Administrative Assistant to the Director | Birck Nanotechnology Center BRK | 1205 W State Street | West Lafayette, IN 47907 o: 765-494-3509<tel:7654943509> | m: 765-491-3064<tel:7654913064> | jjturner@purdue.edu<mailto:jjturner@purdue.edu> [83324AA6]<https://www.purdue.edu/>