Kim, Jihyun Choi, Hae Woon Kim, Bongseop Kim, Eunkyung Lee, Jiwon Lee, Soyoung Kim, Jonghyun 2025-11-21T00:47:20Z 2025-11-21T00:47:20Z 2025-11-11 2025-10 https://pubs.kist.re.kr/handle/201004/153568 This paper reports the development of electronic textiles (e-textiles) using integrated ultraviolet (UV) sensing. The device combined a screen-printed Joule heater with an electrosprayed spiropyran (SP) coating. SP undergoes reversible photoisomerization under UV irradiation, leading to a visible purple coloration and recovery upon heating. Digital image analysis revealed that red and green channel intensities decreased. In contrast, the blue channel remained stable, with ΔE*76 increasing proportionally to irradiation power and time. These optical metrics quantitatively confirmed the UV-dependent color transition of the SP. In addition, polydimethylsiloxane (PDMS) encapsulation improved durability; PDMS-coated textiles showed much smaller resistance variations than uncoated samples under bending, stretching, and fatigue tests. These results demonstrated that SP-based colorimetric sensing combined with flexible Joule heating is a practical and reusable approach for wearable UV monitoring. English AMER CHEMICAL SOC UV Sensor Embedded Wearable E-Textile Based on Reversible Photochromic Spiropyran and Flexible Joule Heater Article 10.1021/acsaelm.5c01453 1 ACS Applied Electronic Materials, v.7, no.20, pp.9415 - 9425 ACS Applied Electronic Materials 7 20 9415 9425 N scie scopus 001591491100001 2-s2.0-105019984118 Engineering, Electrical & Electronic Materials Science, Multidisciplinary Engineering Materials Science Article SMART TEXTILES LIGHT PMMA printing spiropyran coating electrodeheater wearable