Due to its response characteristics, the new sensing material is expected to be applied to various industries such as agriculture, livestock, medical, and mobile." Han Seul Kim, a senior researcher at KISTI says that "this research suggests a new direction for development of semiconductor sensor devices and new materials.
Jin Woo Choi, a senior researcher at KIMS and Dr. In this study, we present the design of an integrated transverse electric mode isolator realized by the epitaxial growth of a cobalt ferrite (CFO) film on a. This technology has important research value as it presented a new sensor concept and demonstration case using a material having a changeable crystalline structure for the first time in the world. Semiconductor gas sensor technology is suitable for lightweight products as well as miniaturization and mass production, which can be used in various fields such as mobile phones, Internet of Things (IoT), agriculture, and livestock industry. In 2021, the global gas sensor market value was $1 billion and is expected to grow by 7.5% annually. By simultaneously utilizing electrical properties and color changes, they succeeded in successfully distinguishing various alcohols of different polarities. Optical isolator, circulator, switch or the like, including a Faraday rotator to which a magnetic field is applied which is oriented along the direction of propagation of light and which is arranged between a preceding polarization filter and a succeeding polarization filter whose planes of polarization enclose an angle with respect to each other such that light can only traverse in one. The team manufactured a sensor device based on this theory and identified that the device can successfully detect water molecules. optical isolator consists of a Bi-substituted YIG single crystal film. They confirmed that the material can reversibly change through supercomputer-based simulations and proved that water molecules are effective stimulants for crystal change. of Waveguide-Type Mono-Sectional Optical Isolators Using Bi: YIG Thin-Films. The research team synthesized non-toxic Cs 3Cu 2I 5, a copper-based eco-friendly metal halide thin film material.
The research team developed a new material whose crystal structure changes when exposed to a specific gas and based on this, produced a high-selectivity gas sensor that changes color and resistance at the same time. The existing materials are underutilized, since the gas selectivity is low as the resistance changes regardless of the type of gas, and in most cases, electrical property change is the only indicator. Existing semiconductor gas sensing materials detect gas as molecules of gas are adsorbed on the surface of the sensing layer resulting in electrical resistance change.
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