TY - JOUR
T1 - High sensitivity flexible paper temperature sensor and body-attachable patch for thermometers
AU - Lee, Jin Woo
AU - Choi, Younguk
AU - Jang, Jaehoon
AU - Yeom, Se Hyuk
AU - Lee, Wanghoon
AU - Ju, Byeong Kwon
N1 - Funding Information:
This work was supported by a grant of the Korea Health Technology R&D program through the Korea Health Industry Development Institute (KHD) , funded by the Ministry of Health & Welfare, Republic of Korea (grant number HI18C0955 ). This study was also supported by the Brain Korea 21 Plus Project in 2020 . J.W. Lee and Y. Choi contributed equally to this work.
Funding Information:
This work was supported by a grant of the Korea Health Technology R&D program through the Korea Health Industry Development Institute (KHD), funded by the Ministry of Health & Welfare, Republic of Korea (grant number HI18C0955). This study was also supported by the Brain Korea 21 Plus Project in 2020. J.W. Lee and Y. Choi contributed equally to this work.
Publisher Copyright:
© 2020
PY - 2020/10/1
Y1 - 2020/10/1
N2 - A highly sensitive, flexible, and wearable paper-based temperature sensor is fabricated using printing paper and poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) solution. It exhibits a negative temperature coefficient and is implemented in a new band-like body-attachable thermometer. Compared to the polymer substrate, the use of hydrophilic and flexible paper substrate facilitates significantly superior sensitivity and simple fabrication. The paper sensor is fabricated by depositing PEDOT:PSS onto the paper with an 80 g base weight for 40 s, which is covered with a 50 μm film to protect it from humidity. This is followed by a heat treatment at 150 °C for 10 min. The paper sensor exhibited an electrical conductivity of 0.48 Ωcm−1 at room temperature with a linearity of 99.86 %. Remarkably, its sensitivity is 658.5 Ω/°C, which is 14 times higher than that of sensor with polyimide substrate (46 Ω/°C), for the body temperature range of 30–42 °C. The paper-based temperature sensor is implemented in a body-attachable patch for a wearable thermometer, which is simply connected with a circuit part for signal processing and the results are transferred to a phone via Bluetooth. The proposed inexpensive sensor is potentially useful for a wide range of flexible electronics and healthcare applications.
AB - A highly sensitive, flexible, and wearable paper-based temperature sensor is fabricated using printing paper and poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) solution. It exhibits a negative temperature coefficient and is implemented in a new band-like body-attachable thermometer. Compared to the polymer substrate, the use of hydrophilic and flexible paper substrate facilitates significantly superior sensitivity and simple fabrication. The paper sensor is fabricated by depositing PEDOT:PSS onto the paper with an 80 g base weight for 40 s, which is covered with a 50 μm film to protect it from humidity. This is followed by a heat treatment at 150 °C for 10 min. The paper sensor exhibited an electrical conductivity of 0.48 Ωcm−1 at room temperature with a linearity of 99.86 %. Remarkably, its sensitivity is 658.5 Ω/°C, which is 14 times higher than that of sensor with polyimide substrate (46 Ω/°C), for the body temperature range of 30–42 °C. The paper-based temperature sensor is implemented in a body-attachable patch for a wearable thermometer, which is simply connected with a circuit part for signal processing and the results are transferred to a phone via Bluetooth. The proposed inexpensive sensor is potentially useful for a wide range of flexible electronics and healthcare applications.
KW - Conductive polymer
KW - Flexible electronics
KW - Paper
KW - Sensor
KW - Wearable devices
UR - http://www.scopus.com/inward/record.url?scp=85088376512&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2020.112205
DO - 10.1016/j.sna.2020.112205
M3 - Article
AN - SCOPUS:85088376512
VL - 313
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
SN - 0924-4247
M1 - 112205
ER -