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IMAGE: Yellow isosurfaces on left panel indicate electrons localized in-between the C3 trimers. Ionized structure on the right has no trapped electrons, and some of the M atoms have been largely. view more
Credit: Soungmin Bae and Hannes Raebiger
An exploratory investigation into the behavior of materials with desirable electric properties resulted in the discovery of a structural phase of two-dimensional (2D) materials. The new family of materials are electrides, wherein electrons occupy a space usually reserved for atoms or ions instead of orbiting the nucleus of an atom or ion. The stable, low-energy, tunable materials could have potential applications in nanotechnologies.
Korea Advanced Institute of Science and Technology
– The first images of mid-infrared optical waves compressed 1,000 times captured using a highly sensitive scattering-type scanning near-field optical microscope. –
KAIST researchers and their collaborators at home and abroad have successfully demonstrated a new methodology for direct near-field optical imaging of acoustic graphene plasmon fields. This strategy will provide a breakthrough for the practical applications of acoustic graphene plasmon platforms in next-generation, high-performance, graphene-based optoelectronic devices with enhanced light-matter interactions and lower propagation loss.
It was recently demonstrated that ‘graphene plasmons’ – collective oscillations of free electrons in graphene coupled to electromagnetic waves of light – can be used to trap and compress optical waves inside a very thin dielectric layer separating graphene from a metallic sheet. In such a configuration, graphene’s conductio
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IMAGE: Schematic diagram of the process of material phase transition, ex-solution particle formation, and the change in catalytic activity depending on the reduction environment. view more
Credit: POSTECH
Fuel cells, which are attracting attention as an eco-friendly energy source, obtain electricity and heat simultaneously through the reverse reaction of water electrolysis. Therefore, the catalyst that enhances the reaction efficiency is directly connected to the performance of the fuel cell. To this, a POSTECH-UNIST joint research team has taken a step closer to developing high-performance catalysts by uncovering the ex-solution and phase transition phenomena at the atomic level for the first time.
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IMAGE: Schematic illustration of switchable metasurfaces
Full-color image is switched on (top) and concealed (bottom) by the polarization angle (0° and 90°) of the incident light, making it applicable to cryptography.. view more
Credit: POSTECH
Despite the anticounterfeiting devices attached to luxury handbags, marketable securities, and identification cards, counterfeit goods are on the rise. There is a demand for the next-generation anticounterfeiting technology - that surpasses the traditional ones - that are not easily forgeable and can hold various data.
A POSTECH research team, led by Professor Junsuk Rho of the departments of mechanical engineering and chemical engineering, Ph.D. candidates Chunghwan Jung of the Department of Chemical Engineering and Younghwan Yang of the Department of Mechanical Engineering, have together succeeded in making a switchable display device using nanostructures that is capable of encrypting full-color images depending
Credit: Korea Institute of Science and Technology(KIST)
Researchers in South Korea have developed a technology that enables immediate detection of specific airborne viruses in the field. The Korea Institute of Science and Technology (KIST) announced that the collaborative research team led by Dr. Joonseok Lee from Molecular Recognition Research Center, Professor Min-Gon Kim from the Department of Chemistry, Gwangju Institute of Science and Technology (GIST), and Professor Chan-Seon Song from the Department of Veterinary Medicine, Konkuk University, developed a detection platform that can simultaneously sample and monitor airborne viruses in the field.
Testing the biological hazards such as various bacteria, fungi, and viruses present in the air generally requires collecting the sample air from the field and conducting a separate analysis on the sample in the laboratory. This analysis process may take a few hours to even several days. Although the existing techniques that suppor