Fully Printed Wearable Vital Sensor for Human Pulse Rate Monitoring using Ferroelectric Polymer

Abstract

The ability to monitor subtle changes in vital and arterial signals using flexible devices attached to the human skin can be valuable for the detection of various health conditions such as cardiovascular disease. Conventional Si device technologies are being utilised in traditional clinical systems; however, its fabrication is not easy owing to the difficulties in adapting to conventional processes. Here, we present the development of a fully printed, wearable, ferroelectric-polymer vital sensor for monitoring the human pulse wave/rate on the skin. This vital sensor is compact, thin, sufficiently flexible, and conforms to the skin while providing high pressure sensitivity, fast response time, superior operational stability, and excellent mechanical fatigue properties. Moreover, the vital sensor is connected to a communication amplifier circuit for monitoring the pulse waves with a wireless sensing system. This sensor system can realise the development of new healthcare devices for wearable sensor applications.

All‐Polymer High‐Performance Photodetector through Lamination

“…Wearable and flexible electronics, such as ion‐sensor arrays, biosensor chips, and vital sensor patches,41–46 have attracted huge attentions due to their potential applications in healthcare. One important function of vital sensor is to monitor the heart rate and there are several different implementations for such function.…”

“…One important function of vital sensor is to monitor the heart rate and there are several different implementations for such function. Organic photodetectors41,47 for heart rate sensing have been studied and reported. Working with LED, a photodetector can detect the light absorptance or scattering variation usually on fingertip or earlobe caused by the peripheral arterial blood flow.…”

Fully Printed Piezoelectric Polymer Loudspeakers with Enhanced Acoustic Performance

“…For the second semicycles 2 and 4, only the second and the third terms are present as the molecular dipoles are already oriented in the previous semicycles. [21] Figure 5c shows P r as a function of the amplitude of the applied electric field. Hysteresis loops are determined by integrating the first term, i.e., the current solely from the orientation of dipoles, which is attained by subtracting the current in the second semicycle from that in the first semicycle.…”

“…[18][19][20][21] Hübler et al reported, for the first time, piezoelectric P(VDF-TrFE) loudspeakers mass printed on conventional paper substrates. Printing is a convenient method for low-cost mass production.…”

Printed Organic Transistor‐Based Enzyme Sensor for Continuous Glucose Monitoring in Wearable Healthcare Applications

“…However, the development of a fully integrated sensor device that conforms flexibly to the human body is still a challenging task . Recently, the printing technology has emerged as a low‐cost, environment‐friendly mass manufacturing technology for the fabrication of next‐generation printed flexible devices based on thin‐film transistors . Organic semiconducting materials are particularly suitable for printed electronics, because they are flexible and solution‐processable.…”