Scholarlink

<p>Respiratory patterns (including breathing rate and depth) are critical vital signs for many disorders, such as asthma, sleep apnea, and chronic obstructive pulmonary disease. Breath sensors are capable of identifying abnormalities in respiratory patterns, which can evaluate the basic human body conditions during sports, surgery, and sleep and play a significant role in the healthcare system. However, present breath sensors have limitations for timely response and are incompatible with practical usage in daily activities. Here, we report an ultrafast-response flexible thermal sensor based on vanadium pentoxide nanorods (V<sub>2</sub>O<sub>5</sub> NRs) network for human respiration monitoring. A polyimide (PI) substrate comprises the fundamental component of the sensor, followed by a V<sub>2</sub>O<sub>5</sub> NRs sensing layer and a medical-grade encapsulating tape. A two-step method which involves hydrothermal synthesis and thermal oxidation is used to synthesize the V<sub>2</sub>O<sub>5</sub> NRs, Raman spectroscopy, XRD, and XPS are used to verify their structural quality. Such fabricated sensor has demonstrated the ability to accurately detect temperature in the range of 25–42&#xa0;°C and excellent sensitivity (-1.55%&#xa0;°C<sup>−1</sup>) and linearity (<i>R</i><sup>2</sup> = 0.985) with a detection accuracy of 0.5&#xa0;°C, enabling it to successfully sense changes in temperature of the exhaled/inhaled breath. Consequently, the sensor exhibits the enhanced breath sensing performance with a response time of 0.56&#xa0;s and a recovery time of 0.97&#xa0;s. Cyclic testing results reveal that the sensor exhibits exceptional consistency and repeatability in sensing human breath at various breathing rates, indicating its potential for long-term, ambulatory respiration monitoring. Furthermore, the sensor can be applied for prewarning of sleep apnea when integrated with an apnea alarm module developed with a microcontroller unit circuitry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ultrafast-response and stable flexible thermal sensor based on V2O5 nanorod network for respiration monitoring

  • 期刊论文

  • 发表日期：

    2026年3月19日

查看全文
  • Zilin Huang,
  • Zhicheng Su,
  • Zainab Zafar,
  • Li Zhu,
  • Qinqi Chen,
  • Kailin Long,
  • Jijun Zou,
  • Xitao Guo

摘要

Respiratory patterns (including breathing rate and depth) are critical vital signs for many disorders, such as asthma, sleep apnea, and chronic obstructive pulmonary disease. Breath sensors are capable of identifying abnormalities in respiratory patterns, which can evaluate the basic human body conditions during sports, surgery, and sleep and play a significant role in the healthcare system. However, present breath sensors have limitations for timely response and are incompatible with practical usage in daily activities. Here, we report an ultrafast-response flexible thermal sensor based on vanadium pentoxide nanorods (V2O5 NRs) network for human respiration monitoring. A polyimide (PI) substrate comprises the fundamental component of the sensor, followed by a V2O5 NRs sensing layer and a medical-grade encapsulating tape. A two-step method which involves hydrothermal synthesis and thermal oxidation is used to synthesize the V2O5 NRs, Raman spectroscopy, XRD, and XPS are used to verify their structural quality. Such fabricated sensor has demonstrated the ability to accurately detect temperature in the range of 25–42 °C and excellent sensitivity (-1.55% °C−1) and linearity (R2 = 0.985) with a detection accuracy of 0.5 °C, enabling it to successfully sense changes in temperature of the exhaled/inhaled breath. Consequently, the sensor exhibits the enhanced breath sensing performance with a response time of 0.56 s and a recovery time of 0.97 s. Cyclic testing results reveal that the sensor exhibits exceptional consistency and repeatability in sensing human breath at various breathing rates, indicating its potential for long-term, ambulatory respiration monitoring. Furthermore, the sensor can be applied for prewarning of sleep apnea when integrated with an apnea alarm module developed with a microcontroller unit circuitry.