2D Hybrid Heterostructures from Transition Metal Dichalcogenides and Organic Systems
Over the past two decades, image reconstruction has tremendously gained in importance in MRI enabling reduced scan time, improved image quality, and extracting additional information from the measurements. In this time, MRI has witnessed extensive developments in advanced computational algorithms for image reconstruction, many of which have been fueled by signal processing advances in several areas, including multi-channel sampling, compressive sensing, dictionary learning, low-rank, and structured low-rank methods. Recently, also neural networks have been employed for image reconstruction achieving further improvements in scan time and image quality. Most importantly, some of these techniques have found their way in the products of MRI vendors and show significant impact in the clinical practice. These developments, together with the advancements in computational hardware have opened a new research field of MRI reconstruction as a computational imaging problem. In this talk, I will explain the framework of MRI reconstruction as a computational imaging problem and discuss some of the advantages it gives in addressing important clinical needs in MRI.
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- Date: 15 Feb 2023
- Time: 12:00 PM to 01:00 PM
- All times are (GMT-05:00) US/Eastern
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- Starts 12 February 2023 07:00 PM
- Ends 15 February 2023 01:00 PM
- All times are (GMT-05:00) US/Eastern
- No Admission Charge
Speakers
Dr. Jong Hyun Choi of Purdue University, USA
2D Hybrid Heterostructures from Transition Metal Dichalcogenides and Organic Systems
Atomically thin transition metal dichalcogenides (TMDs) present extraordinary physicochemical properties that may not be accessible in bulk semiconductors. Recently, 2D hybrid heteromaterials have emerged upon integrating TMDs with molecular systems, including organic molecules, polymers, and metal-organic frameworks, that can tailor the TMD properties. The hybrid approach may enable future optoelectronics and energy applications. I will first introduce the field of 2D materials and describe how TMDs and their heterostructured combinations can be used in devices to maximize their unique properties. This talk will discuss our approach for modulating optoelectronic properties of individual flakes and heterobilayers using organic layers. We show, for example, that the intralayer photoluminescence and interlayer emission may be selectively and controllably tailored by a set of organic molecules with distinct properties. Related electronic transport and surface characteristics will also be delineated. With a vast library of organic molecules, this approach may form the basis of future applications. This presentation will be concluded with several exemplary applications.
Biography:
Dr. Jong Hyun Choi is a Professor of Mechanical Engineering at Purdue University. He received his B.S. and M.S. degrees in Mechanical Engineering from Yonsei University, and earned his doctoral degree, also in Mechanical Engineering, in 2005 from the University of California at Berkeley. He completed postdoctoral research in Chemical Engineering at MIT and University of Illinois before joining Purdue in 2009. He is an NSF Career award winner and an ASME fellow. His research focuses on programmable structures and advanced materials.
Address:United States
Agenda
Atomically thin transition metal dichalcogenides (TMDs) present extraordinary physicochemical properties that may not be accessible in bulk semiconductors. Recently, 2D hybrid heteromaterials have emerged upon integrating TMDs with molecular systems, including organic molecules, polymers, and metal-organic frameworks, that can tailor the TMD properties. The hybrid approach may enable future optoelectronics and energy applications. I will first introduce the field of 2D materials and describe how TMDs and their heterostructured combinations can be used in devices to maximize their unique properties. This talk will discuss our approach for modulating optoelectronic properties of individual flakes and heterobilayers using organic layers. We show, for example, that the intralayer photoluminescence and interlayer emission may be selectively and controllably tailored by a set of organic molecules with distinct properties. Related electronic transport and surface characteristics will also be delineated. With a vast library of organic molecules, this approach may form the basis of future applications. This presentation will be concluded with several exemplary applications.