A research team led by Professor Choi Hyo-sung of the Department of Chemistry recently developed a technology that innovatively improves the performance of the Mechanoluminescent Platform by reforming its 토토사이트 운영자 검거, Hanyang University announced on October 28.

The study opened new possibilities for efficiently improving the 토토사이트 운영자 검거 limitations in the field of conventional smart wearable fiber sensors and medical assistive systems that incorporate mechanoluminescent materials, a material that emits light in response to external stimuli (such as pressure, vibration, tension, and movement) without the need for a power supply.

Conventional mechanoluminescent materials require 토토사이트 운영자 검거 enhancement for practical use. To address this, previous studies have attempted to increase luminance by modifying the crystal characteristics of luminescent materials or by introducing structural changes that respond sensitively to external stimuli. They have also tried improving performance by introducing new polymer matrices or by adjusting the triboelectric characteristics at the interface between the luminescent material and polymer. However, these approaches had limitations, such as introducing structural complexity or requiring strong external stimuli. The study successfully overcame these limitations and enhanced the 토토사이트 운영자 검거 of mechanoluminescence by strengthening the internal triboelectric field. Notably, it is the first case where the 토토사이트 운영자 검거 was efficiently enhanced by directly engineering the surface of the phosphor.

Professor Choi's research team focused on a self-recoverable mechanoluminescent platform based on luminescent materials and polymer matrices. To significantly improve the performance of conventional mechanoluminescent platforms, the research team developed an innovative 토토사이트 운영자 검거 modification technology that chemically functionalizes the 토토사이트 운영자 검거 of the luminescent material with benzoic acid derivatives, thereby increasing the internal triboelectric field.

In this process, the research team confirmed that the surface charge density of the metal oxide shell was adjusted according to the dipole moment of various derivatives, which in turn increased the internal triboelectric field of the mechanoluminescent platform. Moreover, by adjusting the surface’s positive and negative charges according to the ligand of the derivative, the team was able to control the increase and decrease of triboelectricity. Among them, when amino benzoic acid (ABA) was introduced to the surface of the luminescent material, the team achieved up to a 27.4% increase in mechanoluminescence brightness compared to the existing ML platform system.

Not only that such a surface modification method is simple but it also proposes a new technology that uses the controlling of mechanoluminescence 토토사이트 운영자 검거 for anti-counterfeiting. The team can control the amino benzoic acid (ABA) film that had its surface modified to emit stronger light to make it create bright patterns while controlling the fluoro-sulfonyl benzoic acid (FSBA) film with a modified surface to emit weaker light so that it can form dark patterns, and the team used this differences to create various distinct patterns for anti-counterfeiting.

When external stimuli are applied to this film, the 토토사이트 운영자 검거 difference between the ABA and FSBA surface-modified patterns becomes more distinct, and hidden patterns are easily visible. This can be used as an anti-counterfeiting technology that can be visually confirmed, simply by stretching, without the need for special equipment.

The technology has the advantage of distinguishing patterns based on 토토사이트 운영자 검거 differences while emitting lights of the same color, as to conventional anti-counterfeiting methods that use materials that emit lights with different colors. Therefore, it can be used as a simple and effective anti-counterfeiting technology across various fields. Furthermore, it is expected to promote innovative applications in various industrial sectors, including anti-counterfeiting and wearable displays.

Professor Choi Hyo-sung revealed that this is "the case of efficiently enhancing luminance by maximizing the internal triboelectric field of an ML platform with a simple surface modification method," adding, "We expect this technology to become a key technology that brings closer smart wearable sensors, medical assistive systems, and anti-counterfeiting sensors, which traditionally have weak brightness, to commercialization."

The research, which was supported by the Senior Researcher Support Project and the Nano & Material Technology Development Project of the National Research Foundation of Korea, was published in Materials Today (IF 21.1), the world-renowned academic journal in the field of materials science, on October 22.

The paper, Interfacial dipole moment engineering in self-recoverable mechanoluminescent platform, was authored by Dr. Hong In-jeong and Jung Hye-sung from Hanyang University, with Professor Choi Hyo-sung participating as the corresponding author.