TY - JOUR
T1 - A Colorimetric Multifunctional Sensing Method for Structural-Durability-Health Monitoring Systems
AU - Im, Healin
AU - Hong, Seongin
AU - Lee, Yunsu
AU - Lee, Hanseung
AU - Kim, Sunkook
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/6/6
Y1 - 2019/6/6
N2 - A colorimetric multifunctional phototransmittance-based structural durability monitoring system is developed. The system consists of an array with four indium gallium zinc oxide (IGZO)-based phototransistors, a light source at a wavelength of 405 nm through a side-emitting optical fiber, and pH- and Cl-selective color-variable membranes. Under illumination at the wavelength of 405 nm at corrosion status, the pH- and Cl-responsive membrane, showing a change in their color, generates a change in the intensity of the transmitted light, which is received by the phototransistor array in the form of an electrical current. Ids and R (Ids/IpH12) are inversely proportional to the pH, which ranges from 10 to 12. When the pH drops from 12 to 10, the magnitude of Ids and R increases to ≈103. In the case of Cl detection, Ids and R (Ids/ICl0 wt%) increase nearly 50 times with an increase in Cl concentration of 0.05 wt%, and when the Cl concentration reaches 0.30 wt%, Ids and R increase to ≈103 times greater. This multifunctional colorimetric durability sensing system demonstrates considerable potential as a novel smart-diagnostic tool of structural durability with high stability, high sensitivity, and multifunction.
AB - A colorimetric multifunctional phototransmittance-based structural durability monitoring system is developed. The system consists of an array with four indium gallium zinc oxide (IGZO)-based phototransistors, a light source at a wavelength of 405 nm through a side-emitting optical fiber, and pH- and Cl-selective color-variable membranes. Under illumination at the wavelength of 405 nm at corrosion status, the pH- and Cl-responsive membrane, showing a change in their color, generates a change in the intensity of the transmitted light, which is received by the phototransistor array in the form of an electrical current. Ids and R (Ids/IpH12) are inversely proportional to the pH, which ranges from 10 to 12. When the pH drops from 12 to 10, the magnitude of Ids and R increases to ≈103. In the case of Cl detection, Ids and R (Ids/ICl0 wt%) increase nearly 50 times with an increase in Cl concentration of 0.05 wt%, and when the Cl concentration reaches 0.30 wt%, Ids and R increase to ≈103 times greater. This multifunctional colorimetric durability sensing system demonstrates considerable potential as a novel smart-diagnostic tool of structural durability with high stability, high sensitivity, and multifunction.
KW - building structural durability
KW - color-variable membranes
KW - multifunctional sensor arrays
UR - https://www.scopus.com/pages/publications/85064510590
U2 - 10.1002/adma.201807552
DO - 10.1002/adma.201807552
M3 - Article
C2 - 30985020
AN - SCOPUS:85064510590
SN - 0935-9648
VL - 31
JO - Advanced Materials
JF - Advanced Materials
IS - 23
M1 - 1807552
ER -