Research team led by Prof. Kim Sun-kook, Developing color-changing optical-based building durability evaluation system
- 공과대학
- Hit5847
- 2019-05-27
Research team led by Prof. Kim Sun Kook,
The school of Advanced Materials Science & Engineering,
Developing color-changing
optical-based building durability evaluation system
- Advanced Materials, an international journal of science, published online on April 15.-
A research team led by Kim Sun-kook, a professor of Advanced Materials Science & Engineering,
has published a paper on the durability evaluation system of color-changing optical-based buildings operating
in the interior concrete in Advanced Materials (IF=21.95), one of the most prestigious academic journals in the world.
Professor Kim Sun-kook and his research via the collaboration with Lee Han-seung, professor of architectural
engineering at Hanyang University, established a color-changing optics-based building durability evaluation
system to quantify one or more deterioration factors within concrete and assess the degree of corrosion inside
the concrete.
The research team implemented a multi-function monitoring technology that can detect chloride ion and pH,
a typical deterioration causing concrete corrosion, by stacking IGZO phototransistor arrays on the PI flexible
substrates, and a membrane that shows color change in response to external factors.
[Figure 1] A color-changing optical-based building durability evaluation system
This technology monitors the intensity of light irradiated from the side of the SOF in the outermost IGZO photo-
transistor array, where the irradiation light is absorbed and reflected by the color changing membrane located
between the SOF and the flexible photo-transistor array, and finally the photo-transmitter detects the amount of
light penetrating the membrane. Therefore, the color variation of the indicator caused from the external
environment (increasing the concentration of chloride ion, pH, etc.) changes the amount of transmittance
detected by the photo-transistor and obtains electrical signal about the corresponding factors.
"We hope that this research will break the limitations of the existing durability evaluation system and become a
next-generation smart building durability evaluation system with high sensitivity and versatility," said Professor
Kim Sun-kook.
[Figure 2] Results of corrosion monitoring of the durability evaluation system
Professor Kim Sun-kook is actively conducting research on the development and systemization of next-
generation multi-functional nano bioelectronics, including the development of 2D materials and flexible
elements. The research was conducted by the support of the Korea Research Foundation's Leading Research
Center Support Project (the Center for Innovation in Durability of Construction Structures).