A team led by a University of Michigan mechanical engineer has received a five-year, $6.8-million grant from the Air Force to examine this problem, which is a barrier to more powerful, efficient devices.
Led by Kevin Pipe, an assistant professor in the Department of Mechanical Engineering, the team has received a Multidisciplinary University Research Initiative (MURI) award from the Air Force Office of Scientific Research. The research group includes nine scientists and engineers from three universities, including Brown University and the University of California at Santa Cruz.
"The processes by which heat is transferred at interfaces between different materials are poorly understood," Pipe said. "But in many systems, the ability to either efficiently transfer or block heat flow from one material to another is critically important to performance and reliability."
Inefficient heat flow is a main roadblock in the development of lasers and transistors that can attain higher powers. On the other hand, blocking heat exchange can dramatically improve the efficiency of thermoelectric energy conversion for compact power sources.
Pipe's group will use ultrafast lasers in a special X-ray technique developed by David Reis, a team member and associate professor in Physics at U-M. The technique allows researchers to actually watch the vibrations of the atoms that carry heat energy across an interface.
Using nanotechnology, Pipe and his colleagues will reengineer the surfaces of materials to regulate the flow of heat.
"A broad range of military and commercial applications stand to benefit from thermal interface control, including heat sinks for high-power electronics, thermal barrier coatings for aerospace components, and thermoelectric materials for power generation," Pipe said.
In addition to Pipe, the U-M team includes materials science and engineering professors Rachel Goldman and John Kieffer, and assistant professor Max Shtein, as well as physics professor Roberto Merlin and associate professor David Reis. Other members of the team include physics professor Humphrey Maris and engineering professor Arto Nurmikko of Brown University and electrical engineering associate professor Ali Shakouri of U-C Santa Cruz.
The Department of Defense's MURI program is designed to focus on large multidisciplinary topic areas that intersect more than one traditional discipline, bringing together scientists and engineers with different backgrounds to accelerate both basic research and transition to application.Michigan Engineering:
Nicole Casal Moore | EurekAlert!
Investigating cell membranes: researchers develop a substance mimicking a vital membrane component
25.05.2018 | Westfälische Wilhelms-Universität Münster
New approach: Researchers succeed in directly labelling and detecting an important RNA modification
30.04.2018 | Westfälische Wilhelms-Universität Münster
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...
Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.
From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
18.06.2018 | Earth Sciences
18.06.2018 | Process Engineering
18.06.2018 | Life Sciences