Printable, Highly Sensitive Flexible Temperature Sensors for Human Body Temperature Monitoring: A Review
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Printable, Highly Sensitive Flexible Temperature Sensors for Human Body Temperature Monitoring: A Review Yi Su1†, Chunsheng Ma1†, Jing Chen2†, Huiping Wu3, Weixiang Luo3, Yueming Peng4, Zebang Luo2, Lin Li2, Yongsong Tan2, Olatunji Mumini Omisore2, Zhengfang Zhu2, Lei Wang2 and Hui Li2*
Abstract In recent years, the development and research of flexible sensors have gradually deepened, and the performance of wearable, flexible devices for monitoring body temperature has also improved. For the human body, body temperature changes reflect much information about human health, and abnormal body temperature changes usually indicate poor health. Although body temperature is independent of the environment, the body surface temperature is easily affected by the surrounding environment, bringing challenges to body temperature monitoring equipment. To achieve real-time and sensitive detection of various parts temperature of the human body, researchers have developed many different types of high-sensitivity flexible temperature sensors, perfecting the function of electronic skin, and also proposed many practical applications. This article reviews the current research status of highly sensitive patterned flexible temperature sensors used to monitor body temperature changes. First, commonly used substrates and active materials for flexible temperature sensors have been summarized. Second, patterned fabricating methods and processes of flexible temperature sensors are introduced. Then, flexible temperature sensing performance are comprehensively discussed, including temperature measurement range, sensitivity, response time, temperature resolution. Finally, the application of flexible temperature sensors based on highly delicate patterning are demonstrated, and the future challenges of flexible temperature sensors have prospected. Keywords: Flexible sensor, Temperature sensor, Body temperature monitoring, Printable sensor, Wearable electronics Introduction All life activities of the human body based on metabolism and relatively constant body temperature is necessary for a healthy metabolism [1]. Hyperthermia or hypothermia will affect the activity of enzymes in the body, thereby affecting the regular operation of human metabolism, causing disorders of various cells, tissues and organs, and even death in severe cases. It can see that *Correspondence: [email protected] † Yi Su, Chunsheng Ma and Jing Chen contributed equally to this work and share first authorship 2 Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China Full list of author information is available at the end of the article
body temperature’s relative stability is a necessary condition for maintaining a stable environment in the body and ensuring the regular progress of life activities such as metabolism. For the human body, changes in body temperature reflect much information about human health, and abnormal changes in body temperature usua
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