Laboratory for Surface Modification (LSM)

Seminars Archives

November 2017 | December 2017 | January 2018

Thursday, December 07, 2017
Garnet Based Solid State Li-Metal Batteries
Liangbing (Bing) Hu
Department of Materials Science and Engineering
University of Maryland
12:00 Noon CHEM 260

I will start by giving an overview of active research activities in my research group located at University of Maryland Energy Research Center, including wood materials toward sustainability, 3000K high temperature materials and processing, and beyond-Li ion batteries (solid state, Na-ion).

Then I will focus on our recent development on garnet-based solid-state Li-metal batteries with a focus on the following three aspects:
(1) Interface engineering to improve the wetting between Li metal anode and Garnet solid-state electrolyte (Nature Materials 2016; JACS 2016; Advanced Materials 2017; Science Advances 2017);
(2) Garnet based 3D Li ion conductive framework toward high energy density Li-S batteries (EES 2017);
(3) Garnet nanofiber based flexible, hybrid electrolyte with a high Li ion conductivity (PNAS 2016).

Bio Liangbing Hu received his B.S. in physics from the University of Science and Technology of China (USTC) in 2002, where he worked with Prof Yuheng Zhang on colossal magnetoresistance (CMR) materials for three years. He did his Ph.D. in at UCLA (with George Gruner), focusing on carbon nanotube based nanoelectronics (2002-2007). In 2006, he joined Unidym Inc ( as a co-founding scientist. At Unidym, Liangbing’s role was the development of roll-to-roll printed carbon nanotube transparent electrodes and device integrations into touch screens, LCDs, flexible OLEDs and solar cells. He worked at Stanford University (with Yi Cui) from 2009-2011, where he work on various energy devices based on nanomaterials and nanostructures. Currently, he is an associate professor at University of Maryland College Park. His research interests include nanomaterials and nanostructures, roll-to-roll nanomanufacturing, energy storage focusing on solid-state batteries and Na ion batteries, and printed electronics. He has published over 200 research papers (Total citations: >15,000 times) and given more than 70 invited talks. He received many awards, including: the Nano Letters Young Investigator Lectureship (2017), Office of Naval Research Young Investigator Award (2016), ACS Division of Energy and Fuel Emerging Investigator Award (2016), SME Outstanding Young Manufacturing Engineer Award (2016), University of Maryland Junior Faculty Award (School of Engineering, 2015), 3M Non-tenured Faculty Award (2015), Maryland Outstanding Young Engineer (2014), University of Maryland Invention of Year (2014 Physical Science), Campus Star of the American Society for Engineering Education (2014), Air Force Young Investigator Award (AFOSR YIP, 2013). For more info, please visit Dr. Hu is the (founding) director of the Center for Advanced Paper and Textile (CAPT) at the University of Maryland College Park ( He is also the Co-founder of Inventwood Inc. ( with efforts to further commercialize the aforementioned cellulose nanotechnologies.
Thursday, December 14, 2017
Visualizing the Electrostatics of Material Interfaces to Nanoscale Dimensions
Vincent LaBella
Colleges of Nanoscale Science and Engineering
SUNY Polytechnic Institute
12:00 Noon CHEM 260

Electrostatic barriers at material interfaces are the foundation of electronic and optoelectronic devices. Their nanoscale uniformity is of paramount concern with the continued scaling of devices into the sub 10 nm length scale and the development of futuristic nanoscale devices. The electrostatic barrier at metal-semiconductor and metal-insulator-semiconductor interfaces can be visualized using a scanning tunneling microscope in a mode called ballistic electron emission microscopy (BEEM). The BEEM method measures the fraction of the tip current that makes it from the metal into the semiconductor as a function of tip bias and position. The local barrier height is measured by acquiring tens of thousands of BEEM spectra on a grid of tip positions and then fitting them to extract the threshold for onset of BEEM current, which is a measure of the minimum energy the carriers need to surmount the barrier. A false color image or map as well as histograms of these thresholds for a mixed Au/Ag/Si(001) sample are displayed in the figures.
Computational modeling has been developed to extract information about the interface composition and inelastic and elastic scattering rates from the measured histograms. The modeling for the mixed Au/Ag system indicates a mixture of two barrier heights from the individual metal species as well as a skewing to higher energy from the scattering of the hot electrons. Incomplete silicide formation as well as nanometer thick dielectric layers have also been studied and provides new insight into their effects on the electrostatics that is not possible with conventional bulk transport measurements.
Thursday, December 14, 2017
IAMDN/LSM 2018 Symposium
February 27, 2018

You may also view a summary of past and upcoming seminars.