Recent advances of prussian blue-based wearable biosensors for healthcare

Y Jiang, Y Yang, L Shen, J Ma, H Ma… - Analytical Chemistry, 2021 - ACS Publications
Y Jiang, Y Yang, L Shen, J Ma, H Ma, N Zhu
Analytical Chemistry, 2021ACS Publications
Driven by advanced manufacturing technology and intelligent communications, wearable
sensing electronics are gradually entering our daily life, and they can monitor significant
physiological and motion status by continuously acquiring physical signals, such as
temperature, pressure, and strain. In the past 10 years, investigators have been inspired to
develop wearable biosensors in healthcare, and more researchers have focused on
transducing/converting chemical and biological information in human body fluids into …
Driven by advanced manufacturing technology and intelligent communications, wearable sensing electronics are gradually entering our daily life, and they can monitor significant physiological and motion status by continuously acquiring physical signals, such as temperature, pressure, and strain. In the past 10 years, investigators have been inspired to develop wearable biosensors in healthcare, and more researchers have focused on transducing/converting chemical and biological information in human body fluids into measurable electronic signals to enable self-management and precision medicine. Although such directions have involved various subjects, technology, and fields, the core is electroanalytical chemistry and smart materials. Among the available electrochemical sensing materials, Prussian blue (PB) and Prussian blue analogues (PBAs) stand out. Especially, low toxicity, easy to be synthesized and a unique archetypal hexacyanometalate framework structure, open channels, and the behavior of facile insertion/extraction ions generally make it easy to acquire excellent electrochemical performance with high catalytic activity and attract wide attention as an electrode modifier in wearable biosensing fields. PB/PBAs-based wearable sensors in healthcare exhibit enormous potential, and they can be used as a smart patch for motion monitoring, precision medicine, and nutrition tracking (Figure 1). Recently, several preeminent review papers about PB/PBAs have discussed above areas of synthesizing, properties and biosensing application. 1, 2 However, because of great research and development of PB/PBAs and related wearable biosensors in recent years, PB/PBAs nanostructures/films/composites applied in smart biosensing field have made rapid progress. In view of these developments, promising contributions in PB/PBAs and their application for wearable biosensor are introduced in this paper in terms of structure/properties, synthetic technology, electrochemical application, and wearable devices.
The scope of this Review includes PB/PBAs crystalline structures and electrochemical properties, kinetic mechanism based on self-assembled single electrode, controlled synthetic methods of films/composites/micro/nanostructures, application in electrocatalysis, and electrochemical sensing, especially in a wearable biosensor. Moreover, the significant research achievements and prospective of PB/PBAs, as well as deficiency and problems, will be summarized. At the same time, this Review will provide some new motivation for
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