Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A thin ribbon of flexible electronics can monitor health, infrastructure

17.08.2015

A new world of flexible, bendable, even stretchable electronics is emerging from research labs to address a wide range of potentially game-changing uses. The common, rigid printed circuit board is slowly being replaced by a thin ribbon of resilient, high-performance electronics. Over the last few years, one team of chemists and materials scientists has begun exploring military applications in harsh environments for aircraft, explosive devices and even combatants themselves.

Researchers will provide an update on the latest technologies, as well as future research plans, at the 250th National Meeting & Exposition of the American Chemical Society (ACS). ACS is the world's largest scientific society. The meeting takes place here through Thursday.


Stretchy, bendable electronics could have many uses, such as monitoring patients' health and keeping tabs on airplanes.

Credit: Benjamin Leever, Ph.D.

"Basically, we are using a hybrid technology that mixes traditional electronics with flexible, high-performance electronics and new 3-D printing technologies," says Benjamin J. Leever, Ph.D., who is at the Air Force Research Laboratory at Wright-Patterson Air Force Base. "In some cases, we incorporate 'inks,' which are based on metals, polymers and organic materials, to tie the system together electronically. With our technology, we can take a razor-thin silicon integrated circuit, a few hundred nanometers thick, and place it on a flexible, bendable or even foldable, plastic-like substrate material," he says.

To allow electronics to be bendable or stretchable or even change their configuration after fabrication, the Wright-Patterson team has turned to liquid gallium alloys as an electrical interconnect material, Leever says. "While these liquid alloys typically oxidize within minutes and become essentially useless," he says, "the team has been able to dramatically reduce the effects of the oxidation through the use of ionic species confined to the walls of microvascular channels within the flexible substrates."

The result is thin, foldable material that allows the circuitry to fit into extremely tight spaces and even to be integrated into complex curved surfaces, such as an airplane's wing, or even a person's skin.

In aircraft applications, Leever explains, the hybrid flexible system can be used to monitor stresses and strains and report this information through miniature embedded antennas to ground crews or a pilot. The researchers also are developing the same approach to monitor pilots' health. This involves a biosensor system that can measure heartbeat, hydration levels, sweat, temperature and other vital signs through miniature circuitry. The system would be embedded on a flexible, wearable patch and would include an antenna to transmit these biometric signals to the pilot or a ground team. The patch will "breathe," bend and stretch, and will provide real-time measurements of metrics that indicate fatigue or potential cognitive problems, Leever notes.

Another military application the Air Force is pursuing is use of a flexible hybrid system in "bunker buster" bombs, which detonate after penetrating deep in the earth. Because of the system's toughness, Leever says, initial testing suggests that the flexible circuitry would remain viable and could detonate the weapon after surviving the initial impact of ground contact after being dropped from aircraft.

In the civilian world, Leever foresees use of flexible systems to monitor the conditions of bridges and other types of infrastructure in real time. He also points to medical applications, such as physical feedback for athletes as they exercise and real-time hospital monitoring for caregivers concerned about changes in a patient's vital signs. This type of monitoring dispenses with the need for the bulky electrodes and wiring that normally are associated with close medical surveillance.

"Overall, the military has the advantage of being able to move ahead with potentially higher risk research," he explains. "Commercial investors want a clear demonstration before making an investment. The military can pursue possibly transformational applications at earlier stages if we see a promising approach to realize and advance a technology's revolutionary potential. When we are successful, the commercial sector directly benefits."

Leever adds that the Wright-Patterson team is part of a newly created Department of Defense-led Flexible Hybrid Electronics Manufacturing Innovation Institute, which was announced by President Barack Obama last December. Over the next five years, $75 million will be offered in matching grants to spur domestic development of flexible hybrid electronics manufacturing.

###

A press conference on this topic will be held Monday, Aug. 17, at 1 p.m. Eastern time in the Boston Convention & Exhibition Center. Reporters may check-in at Room 153B in person, or watch live on YouTube http://bit.ly/ACSLiveBoston. To ask questions online, sign in with a Google account.

The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With more than 158,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

To automatically receive news releases from the American Chemical Society, contact newsroom@acs.org.

Note to journalists: Please report that this research was presented at a meeting of the American Chemical Society.

Follow us: Twitter | Facebook

Title

Development of flexible hybrid electronics materials and processes for Air Force applications

Abstract

By combining thinned devices based on inorganic semiconductors with components & interconnects that are 3D printed/additively manufactured on non-traditional substrates, Flexible Hybrid Electronics (FHE) can deliver significant size, weight, and power (SWaP) benefits without sacrificing performance. FHE are expected to impact a range of Air Force applications including: wearable electronics and sensors for monitoring airman health/performance; conformal electronics and antennas for maximizing space efficiency and reducing aerodynamic drag; and inherently more durable circuits that will withstand the extreme strain, shock, and vibration environments typical of Air Force missions.

Related to these goals, we are developing approaches to inject and print gallium-based liquid metal alloys into varied materials for stretchable and reconfigurable electronics. For energy devices we have demonstrated solution-processable approaches to fabricate organic photovoltaic devices on nearly arbitrary surfaces including PET and polymer reinforced polymer composites. We have also fabricated Li-ion batteries based on structurally resilient carbon nanotube-based electrodes that have survived thousands of flexing cycles. The presentation will also discuss the development of silver inks as an interconnect material for flexible Si CMOS ICs on elastomers. Finally, initial molecular dynamics based approaches to model the interaction of inks on various surfaces will also be described.

Media Contact

617-954-3971 (Boston Press Center, Aug. 16-19)

Michael Bernstein
202-872-6042 (D.C. Office)
301-275-3221 (Cell)
m_bernstein@acs.org

Katie Cottingham, Ph.D.
301-775-8455 (Cell)
k_cottingham@acs.org

www.acs.org

Michael Bernstein | EurekAlert!

More articles from Life Sciences:

nachricht Transport of molecular motors into cilia
28.03.2017 | Aarhus University

nachricht Asian dust providing key nutrients for California's giant sequoias
28.03.2017 | University of California - Riverside

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Transport of molecular motors into cilia

28.03.2017 | Life Sciences

A novel hybrid UAV that may change the way people operate drones

28.03.2017 | Information Technology

NASA spacecraft investigate clues in radiation belts

28.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>