ADVANCED MATERIALS & PROCESSES | MAY/JUNE 2024 9 Bilayer graphene is one of the typical nanomaterials that benefit from using the hybrid nano-microscope. Depending on the voltage applied to each layer or the twisted angle between two layers, the bilayer graphene exhibits various properties, including superconductivity. The KRISS researchers elucidated the principles of the unique infrared absorption response observed in bilayer graphene with the hybrid nano-microscope and confirmed that this phenomenon is caused by the charge imbalance between the two layers of graphene. Conventional nano-microscopes can only measure a single property of a material at a time, making it challenging to measure and analyze composite properties. By expanding measurement capabilities to magnetic properties, in addition to optical and electrical properties, it will now be possible for researchers to observe all three properties simultaneously on the nanoscale. This is expected to accelerate research on the properties of various nanocomposite materials, including quantum materials, contributing to the development of nanomaterials, parts, and equipment. www.kriss.re.kr/eng. ROUGHNESS AND ADHESION OF SOFT MATERIALS It is widely known that adhesive contact is formed more easily than it is broken. Now, an international team of researchers discovered that this phenomenon, called adhesion hysteresis, is caused by the surface roughness of the adherent soft materials. The team, including researchers from the University of Pittsburgh, the University of Freiburg in Germany, and the University of Akron in Ohio, conducted a combination of experimental observations and simulations to demonstrate how roughness interferes with the This graphic shows the contact area of a so solid that is separated from a rough surface. The di erent color intensity shows how much energy is lost in the process. Courtesy of Antoine Sanner/Lars Pastewka. separation process. The materials detach in minute, abrupt movements, which release parts of the adhesive bond incrementally. “We have succeeded for the first time in calculating the adhesion hysteresis for realistic surface roughness. This is based on the efficiency of the numerical model and an extremely detailed surface characterization carried out by researchers at the University of Pittsburgh,” says Tevis Jacobs. The team’s findings may make it possible to control the adhesion properties of soft materials through surface roughness. It also may aid the development of new and improved applications in soft robotics or production technology, like grippers or placement systems. pitt.edu, uakron.edu, www.uni-freiburg.de/en. ORDER TODAY! Visit asminternational.org or call 800.336.5152. ASM HANDBOOK VOLUME 10: MATERIALS CHARACTERIZATION The 2019 edition of ASM Handbook, Volume 10: Materials Characterization provides detailed technical information that will enable readers to select and use analytical techniques that are appropriate for their problem. Each article describing a characterization technique begins with an overview of the method in simplified terms and lists common applications as well as limitations. The articles also describe materials characterization in general terms according to material type and serve as a jumping o point to the more specific technique articles. asminternational.org Print: $380 / ASM Member: $285 ISBN: 9781627082112 Product Code: 05918G ASM Digital Library: $102 / ASM Member: $79 EISBN: 978-1-62708-213-6 ASM Digital Library price is for one-year single user access. Pages: 807 VOLUME EDITORS: THOMAS J. BRUNO, RYAN DEACON, JEFFREY A. JANSEN, NEAL MAGDEFRAU, ERIK MUELLER, GEORGE F. VANDER VOORT, DEHUA YANG
RkJQdWJsaXNoZXIy MTYyMzk3NQ==