Spring 2021 Seminar Series: Daniel Grave @ Online
Feb 3 @ 2:30 pm – 3:30 pm

Daniel Grave

Ben University of the Negev

Host:  Patty McGuiggan

Photoelectrochemical solar fuel production is a promising route for converting solar energy into clean, renewable fuel such as hydrogen. The greatest challenge towards efficient solar fuel production is in the design of photoelectrode materials that harvest light and drive electrochemical processes. Metal-oxides are particularly suitable as photoelectrode materials due to their abundance, low cost, and stability in aqueous solution – requirements that traditional semiconductors do not meet. Despite much progress, a path forward towards designing devices with high efficiency has remained elusive, partly due to electron-electron and electron-lattice interactions in these materials, which introduce deviation from conventional semiconductor behavior.
In this talk, I will demonstrate how we use epitaxial thin films as model systems to study the effect of light-matter interaction on photoelectrochemical behavior in complex metal-oxides. We combine these observations with time-resolved spectroscopy to show that excitation-wavelength-dependent charge carrier localization is an overlooked, yet fundamental limitation for achieving high efficiencies in several metal-oxide materials. We then develop a new method to quantify the spectral profile of the mobile charge carrier photogeneration yield in any thin film photoelectrode material and provide a path forward towards improved devices for solar energy conversion and storage.


Zoom Seminar Info:

Meeting ID: 982 0915 3548

Passcode:  621450

Fall 2021 Seminar Series: Susan Thomas
Sep 8 @ 2:30 pm – 3:30 pm

Susan N. Thomas

Associate Professor
George W. Woodruff School of Mechanical Engineering Associate Director, Integrated Cancer Research Center

Georgia Tech


Hosted by Hai-Quan Mao


Immunotherapeutic drug delivery to lymph nodes augments cancer immunotherapy

Lymph nodes mediate the co-mingling of cells of the adaptive system to coordinate adaptive immune response. Drug delivery principles and technologies our group has developed to leverage the potential of lymph nodes as immunotherapeutic drug targets to augment anti-cancer therapeutic effects will be described


Zoom Meeting ID:  935 7340 1920
Passcode:  007663


Seminar Series: Allen Wang
Sep 15 @ 2:30 pm – 3:30 pm

Allen Wang

ETHICON Biosurgery R&D
Johnson & Johnson
Hosted by Hai-Quan Mao

From Benchtop to Commercialization – a Class III Medical Device

Continuous oozing is the number one bleeding problem in the surgical operating rooms, occurring in more than 50% of all surgeries, across different specialties all over the world. SURGICEL® Powder Absorbable Hemostat, a Class III medical device, was developed to control broad continuous oozing efficiently and effectively in open or minimal invasive surgeries when ligation or other methods of bleeding control are not possible. This presentation will walk you through how team brought a medical device to market, including identification of unmet needs, concept generations, new product development, commercialization, and teamwork.



Dr. Allen Y. Wang is currently a Global Technical Lead in New Product Development at Ethicon Biosurgery, a medical device subsidiary of Johnson & Johnson. In 2008, after obtaining his PhD from Johns Hopkins University, Allen joined Johnson & Johnson Wound Management R&D and quickly set the standard of excellence, holding over 70 patents and 45 patent applications worldwide and several peer‐reviewed publications, and developing several new surgical products to help more patients. His most recent Class III medical device invention, SURGICEL Powder Absorbable Hemostat, has served numerous patients in more than 45 countries since its launch in late 2017 and led to Allen and his team being awarded the 2020 Johnson Medal (a.k.a. Johnson & Johnson Nobel Prize) and several prestigious international awards such as the Gold Medical Design Excellence Award (MDEA) in the Drug‐Delivery Devices and Combination Products and the R&D 100 Award. Currently, he continues to work with J&J divisions globally to expand the Biosurgery product portfolio and generate novel surgical products for their future pipeline to address unmet surgical needs to enhance the health of people all over the world.


Zoom Meeting ID:  935 7340 1920
Passcode:  007663
Seminar Series: Chunsheng Wang @ Mudd Hall, Room 26
Sep 22 @ 2:30 pm – 3:30 pm

Chunsheng Wang

Center for Research in Extreme Batteries
Department of Chemical & Biomolecular Engineering
University of Maryland

Hosted by Mingwei Chen


Electrolytes for high energy Li-ion and Li metal batteries

Abstract: Electrolytes are critical enabling components for Li-ion batteries to safely operate within a wide temperature range, under extreme fast charging, and under intense abuse conditions without sacrificing energy density and cycle life. Current electrolytes cannot satisfy these requirements. We developed advanced all-fluorinated electrolytes, water-in-sale (WIS) electrolytes and solid-state electrolytes aiming to simultaneously enhance cell energy density and safety.  Guided by the electrolyte design principle for high-capacity electrodes with large volume changes, we developed serval organic liquid electrolytes suitable for micro-sized Si and Li metal anodes and NMC cathodes. We also reduced the salt concentration of water-in-salt electrolytes from 21 m to 4.5m and extended the electrochemical stability window from 3.0V of WIS to 3.4V. These improved electrolytes enable LiMn2O4/Li4Ti5O12 pouch cells with an areal capacity of 2.5 mAh/cm2 and a P/N capacity ratio of 1.14 to achieve a long cycle life of 500. For solid state electrolyte Li metal batteries, we suppressed the Li dendrite growth and reduced the interface resistance by constructing a lithionphobic-lithiophoilic interlayer between solid electrolyte and Li metal anodes. The critical role of solid electrolyte interphase in accommodating electrode volume changes was also investigated.

Bio: Dr. Wang is a Robert Franklin and Frances Riggs Wright distinguished chair professor at the University of Maryland College Park. He is a co-founder and UMD Director of The UMD-ARL Center for Research in Extreme Battery, and associate editor of ACS Applied Energy Materials. His current research focuses on Li-ion battery electrolytes and developed a water-in-salt electrolyte and a transition metal free LiBr-LiCl-Graphite cathode for Li-ion batteries. He has published more than 300 papers and has been tanked as a Highly Cited Researcher by Clarivate. He is the recipient of University of Maryland’s 2016 and 2021 Invention of the Year Award. His battery technologies have been licensed by the Aqualith Advanced Materials. He also received award of ECS Battery Division Research Award in 2021.


ZOOM MEETING ID:  935 7340 1920
PASSCODE:  007663
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