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February 2021

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BNC Faculty Seminar Series: Speaker - Letian Dou - Feb 11th | 12noon | via Zoom
by Turner, Jaime J 08 Feb '21

08 Feb '21

[cid:image004.jpg@01D685C0.EB336F80] The BNC 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. Letian Dou Charles Davidson Chair Assistant Professor of Chemical Engineering February 11th, 2021 | 12:00pm Join Zoom: https://purdue-edu.zoom.us/j/91754078808 Title: Organic-Perovskite Hybrid Quantum Wells, Heterostructure, and Optoelectronics Abstract: Halide perovskites are exciting new semiconductors that show great promising in low cost and high-performance optoelectronics devices including solar cells, LEDs, photodetectors, transistors, etc. However, the poor stability is limiting their practical use. In this talk, I will present a molecular approach to the synthesis of a new family of organic-inorganic hybrid perovskite quantum wells incorporating widely tunable organic semiconducting building blocks. Energy transfer and charge transfer between adjacent organic and inorganic layers are extremely fast and efficient, owing to the atomically-flat interface and ultra-small interlayer distance. Importantly, this rigid conjugated ligand design dramatically enhances materials' chemical stability and suppresses solid-state ion migration and diffusion, making them promising for real-world applications. Based on this, we demonstrate for the first time an epitaxial halide perovskite heterostructure with near atomically-sharp interface, which pave the way for perovskite nanoelectronics and nanophotonics. Finally, using this stable organic-perovskite hybrid quantum well concept, we demonstrate the fabrication of high-quality polycrystalline thin films and highly stable and efficient solar cells and LEDs as well as high mobility transistors. Bio: [cid:image003.jpg@01D6FE04.9F253B70] Dr. Letian Dou is currently the Charles Davidson Chair Assistant Professor of chemical engineering at Purdue University. He obtained his B.S. in Chemistry from Peking University in 2009 and Ph.D in Materials Science and Engineering from UCLA in 2014. From 2014 to 2017, he was a postdoctoral fellow at the Department of Chemistry, University of California-Berkeley and Materials Science Division, Lawrence Berkeley National Laboratory. His research interest includes the design and synthesis of organic-inorganic hybrid materials and low-dimensional materials, fundamental understanding of the structure-property relationships, as well as applications in high performance electronic and optoelectronic devices. He is a recipient of Office of Naval Research Young Investigator Award (2019), Highly Cited Researcher in Cross-Fields (2019-2020), MIT Technology Review Innovators Under 35-China Award (2018), and MRS Graduate Student Award (2014). Upcoming BNC Virtual Faculty Seminars, Spring 2021: Date Faculty Title 1/28/20 Dmitry Zemlyanov, Senior Research Scientist - Surface Science Application, Birck Nanotechnology Center Growth and characterization of 2D materials 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 4D Materials Science - Probing Microstructural Evolution Through Time-Resolved Imaging 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 Alex Chortos, Assistant Professor, Mechanical Engineering 4/8/21 Ajay Malshe, R. Eugene and Susie E. Goodson Distinguished Professor of Mechanical Engineering 4/15/21 Suranjan Panigrahi, Professor Electrical and Computer Engineering Technology 4/22/21 Alejandro Strachan, Professor of Materials Engineering 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(a)purdue.edu<mailto:jjturner@purdue.edu> [83324AA6]<https://www.purdue.edu/>

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BNC E-news: February 1st, 2021
by Turner, Jaime J 01 Feb '21

01 Feb '21

[cid:image006.jpg@01D685C3.FA345960] Responding to COVID-19: Research Operations at Birck https://www.purdue.edu/discoverypark/birck/for-birck-users/covid/index.php Seminars /Workshops / Events Professor Pramey Upadhyaya Webinar February 4th, 2021 | 10am – 11am Title: Hybrid Quantum Spintronics (Abstract Attached) Zoom Link: https://purdue-edu.zoom.us/j/3164232249 nanoHUB is excited to announce the first four workshops for the Spring 2021 session of our Hands-on Data Science and Machine Learning Training Series. Series information. Our series is aimed at active researchers and educators and designed to introduce practical skills with online, hands-on activities participnts will be able to incorporate in their work. Hands-on activities will use nanoHUB cloud computing resources, no need to download or install any software. All you need is an internet connection and a browser. After the training sessions, you will be able to continue using nanoHUB for research or education. Registration links and material for prior workshops can be found at the workshop webpage: https://nanohub.org/groups/ml/handsontraining Register soon as seats are limited. * Date/Time: February 3, 2021 / 1 PM – 2 PM EST Title: Convenient and efficient evelopment of Machine Learning Interatomic Potentials By: Chi Chen, Yunxing Zuo, and Shyue Ping Ong * Register here (limited seats): https://purdue.webex.com/purdue/onstage/g.php?MTID=e135394b9269645c5f55a869… Abstract: This tutorial introduces the concepts of machine learning interatomic potentials (ML-IAPs) in materials science, including two components of local environment atomic descriptors and machine learning models. Using the prepared dataset, you will learn how to build a prototype ML-IAP and use it to predict basic material properties for a multi-component system. PQSEI Seminar February 10 | Dr. Ruth Pachter of AFRL. They still several open spots still available if you’d like to present or invite a speaker please let David Stewart (davidstewart(a)purdue.edu<mailto:davidstewart@purdue.edu>) know. Full schedule is here: PQSEI Events Spring 2021<https://purdue0-my.sharepoint.com/:w:/g/personal/stewartd_purdue_edu/ETjOtD…> Indiana-focused conference, Environmental Justice, Next Steps – Environment Justice, Climate Change, and Racial Justice March 25 – 26, 2021 The goal of this virtual conference is to create a regional action network on environmental justice by bringing together Purdue researchers, artists, scholars and stakeholders, and including peers working at research institutions across the state. Through the conference, Purdue will bring diverse scholars and leaders together to broaden the conversation on environmental justice with a focus Indiana and the Midwest by inviting researchers in areas including environmental sciences, racial & social justice, decolonization, engineering, law and environmental policy, and the visual and performing arts with the intention of starting long-term collaborations and conversations to maximize the impact of discussions moving forward. Website: https://www.purdue.edu/discoverypark/environment/resources/Env-justice.php Birck Events<https://www.purdue.edu/discoverypark/birck/events/index.php> and Birck News<https://www.purdue.edu/discoverypark/birck/news/index.php> COVID Safety at Birck Dear Birck Research Community, As part of the Protect Purdue initiative there continue to be unannounced audits conducted at all facilities around campus. The Birck facility was audited on Tuesday January 26th. Our building met all the requirements of facility-related COVID protection……we have the proper signage, sanitization stations, seating spacing, etc. However the report also contained citations of improper behavior of individuals in the building. Three individuals were observed in shared offices without wearing masks, and two other people were observed having a conversation with less than 6’ spacing. We’re asking our Birck community members to re-double your efforts to comply with all the COVID safety protocols when you’re in our facility. Please make sure to wear masks, maintain at least 6’ social distancing, and continue to frequently use the sanitization stations located throughout the building. We can all do our part to maximize safety and help keep our research ongoing in a COVID-safe environment. Thanks to all, Ron Reger and Steve Jurss. ************* Birck Safety Protocols It is very gratifying to see our research community back ‘in business’ doing leading-edge research in our center after the long pause we all experienced this Spring. But at the same time we want to remind our entire user group of the critical importance of following the COVID safety protocols while using our facilities. If an outbreak of COVID exposures should happen at Birck there is a real possibility that we may need to close the facility again. So please read and support the following….. …..Some of our approved users are holding the doors open for others to enter the building. This may very well be a gesture of politeness to assist another, but it also can be perceived that non-approved people are entering our building with the assistance of one of our approved users. Additionally it does not allow us to have an accurate accounting of who is entering our building by evaluating card-swipe data. So everyone should swipe into Birck and not be let in by someone holding the door open. …..Face masks are required while in Birck. Approved users have been, and continue to be, strongly encouraged to bring their own face mask for their personal use while in the facility. At the entrances we have supplied quantities of disposable face masks for emergency use, but our supplies of these disposable masks are being depleted at the high rate of 300 – 400 masks per week. This rate of use seems exceptionally high when personal masks are strongly recommended. Please only take one mask from the supply, and only when you’ve forgotten your personal mask. ….Social distancing continues to be a challenge. This is a difficult habit to develop and groups of people have been seen clustered around a tool, or having a hallway conversation, and not adhering to the 6’ spacing rule. Please continue to maintain at least 6’ spacing between yourself and the nearest other person. Please stay vigilant in promoting and supporting these safety protocols. If we each do our part we will continue to stay open and conduct state-of-the-art research in our great facility. Follow us on Facebook and Twitter [Facebook icon]<https://www.facebook.com/nano.purdue.edu/> [Twitter icon] <https://twitter.com/BNCPurdue> ***If you have any news items (published papers, research news, awards, honors) please send to jjturner(a)purdue.edu<mailto:jjturner@purdue.edu> so they may be included on Birck’s website, Facebook and Twitter pages*** 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(a)purdue.edu<mailto:jjturner@purdue.edu> [83324AA6]<https://www.purdue.edu/>

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