Page 18 - ASME SMASIS 2016 Program

Symposia

Professor at KAIST (Korea Advanced Institute of Science and Technolo- Biography
gy), and the Director of ICT Bridge Research Center sponsored by the
Ministry of Land, Infrastructure and Transport in Korea (about 25 Million Donald Leo is currently the dean of the College of Engineering at the
USD project over 5 years). Over last twenty years, his research interest University of Georgia, and holds the University Foundation Professorship
has been in the areas of structural health monitoring, nondestructive in Engineering. The College of Engineering at the University of Georgia
testing and sensing technologies. His research interests include guided (UGA) is the newest college in the oldest state chartered institution in the
waves, noncontact laser ultrasonics, structural health monitoring, United States. Since its inception in 2012 it has tripled in size to nearly
nondestructive testing, smart materials and sensing, and statistical 2,000 undergraduate and graduate students, has over 70 full-time faculty
pattern recognition to name a few. He has published over 120 refereed members, and has doubled its research output in the past three years.
journal articles, over 270 conference proceedings, and 10 book & book Prior to joining UGA, he was a faculty member in the Mechanical Engineer-
chapters. He was selected as one of 100 most promising individuals in ing Department at Virginia Tech, and Associate Director of the Center for
Korea in 2012 by Donga Daily Newspaper, which is one of the three major Intelligent Material Systems and Structures. His research activities focus
newspapers in Korea. He was also the recipient of SHM Person-of-Year on the modeling, analysis, and control of smart material systems, with a
Award at 2011 International workshop on SHM and 2008 Young Scientists particular emphasis on polymeric systems and biomolecular materials. He
Award in Korea, which is similar to the Presidential Early Career Award is the author of the textbook Engineering Analysis of Smart Material
from US National Science Foundation (PECASE Award). His work has Systems, has published over 200 publications, and is a Fellow of the
been funded by the Boeing Company, Samsun Electronics, US Air Force American Society of Mechanical Engineers.
Research Laboratory, US Air Force Office of Scientific Research (US
AFOSR), US National Science Foundation, National Research Foundation
of Korea, Korea Agency for Defense Development, Hyundai & KIA Motors, BIO-INSPIRED HAIR-LIKE SENSING AND INTEGRATION WITH
Hyundai Heavy Industry, Bombardier, POSCO, Daewoo Construction. AEROSPACE STRUCTURAL COMPOSITES

Jeff Baur
SYMPOSIUM 6 Air Force Research Laboratory
Wright-Patterson AFB, OH
BIOMOLECULAR MATERIALS AND MATERIAL SYSTEMS:
MIMICKING NATURE’S SMART MATERIALS

Abstract
Donald Leo While distributed microscale hair array mechanosensory systems are
University of Georgia pervasive in many animals such as the cricket, locusts, bats, and fish, the
Athens, GA
mimicking the hair sensor properties with similar scale artificial hair sensor
devices remained a challenge. Over the past years, the Artificial Hair
Sensor Research Team has conducted multidisciplinary research leading
to the conception, development, and demonstration of a microscale
Abstract artificial hair sensor for boundary-layer flow sensing, as well as shear
Nature uses stimuli-responsive biomolecules to control the transport of sensing within bonded composite joints. Flow and mechanical strain are
charge and mass at the nanoscale. These biomolecules are embedded in measured through the defection of a single “fuzzy-fiber” hair composed of
cells, which in turn are the building blocks for complex biological systems a glass fiber with radially-grown forest of carbon nanotubes (CNTs) within a
that exhibit emergent behavior. This talk will discuss our recent work in capillary pore. When deflected, the internal radial CNT array is com-
mimicking the hierarchical nature of biological materials and material pressed against an electrode within the pore and the corresponding
systems through the use of reconstituted stimuli-responsive channels decrease in electrical resistance is correlated with the external loading.
embedded into synthetic materials. Based on the concept of a droplet-in- This small, simple, low-cost, and low-power sensor currently has high
terface bilayer, we have created a “biomolecular unit cell” that consists of sensitivity, a response that can be tailored to quasi-static and dynamic
a liquid or hydrophilic gel encased in a hydrophobic matrix. Lipid monolay- displacements, is robust to 100’s of hours of testing, and can be non-inva-
ers are incorporated at the hydrophilic-hydrophobic interface, and sively integrated into a variety of aero structures. This presentation will
physical contact between two compartments results in the creation of a discuss the design, fabrication, and structure-property relationships of
lipid bilayer. This lipid bilayer mimics the functional properties of cells and sensors, their integration with aerodynamic elements, measurement of
enables the incorporation of stimuli-responsive biomolecules such as boundary layer flow properties, and use within bonded composite
voltage-gated pores, mechanosensitive channels, and light-activated structures to detect precursor events prior to shear failure. Due to their
molecules. In the past two years we have successfully created networks low-cost and small size, these sensors are easily integrated into arrays to
of these materials and, working with other researchers, demonstrated that provide spatial mapping of properties.
we can create material systems that exhibit collective behavior. Unit cells
1,2
3
1,2
18 have been used as building blocks to create fluid flow sensors, air flow Collaborators: Keith Slinker , Corey Kondash , Greg Reich , Ben
sensors, and recent results have demonstrated the ability to encase Dickinson 4
hundreds of unit cells into solid materials.