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Bio-integrated wearable systems can measure a broad range of biophysical, biochemical, and environmental signals to provide critical insights into overall health status and to quantify human performance. Recent advances in material science, chemical analysis techniques, device designs, and assembly methods form the foundations for a uniquely differentiated type of wearable technology, characterized by noninvasive, intimate integration with the soft, curved, time-dynamic surfaces of the body. This review summarizes the latest advances in this emerging field of "bio-integrated" technologies in a comprehensive manner that connects fundamental developments in chemistry, material science, and engineering with sensing technologies that have the potential for widespread deployment and societal benefit in human health care. An introduction to the chemistries and materials for the active components of these systems contextualizes essential design considerations for sensors and associated platforms that appear in following sections. The subsequent content highlights the most advanced biosensors, classified according to their ability to capture biophysical, biochemical, and environmental information. Additional sections feature schemes for electrically powering these sensors and strategies for achieving fully integrated, wireless systems. The review concludes with an overview of key remaining challenges and a summary of opportunities where advances in materials chemistry will be critically important for continued progress.
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http://dx.doi.org/10.1021/acs.chemrev.8b00573 | DOI Listing |
Adv Sci (Weinh)
August 2025
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.
Developing intrinsically stretchable field-effect transistors (FETs) is critical for enabling next-generation flexible, wearable, and bio-integrated electronic systems. Unlike conventional stretchable devices that rely primarily on geometric engineering of rigid materials, intrinsically stretchable FETs involve materials that inherently withstand large mechanical deformation while preserving their electronic performance. Although significant progress is achieved in the field of stretchable devices, further innovation in semiconductor materials and compatible process technologies remains essential for advancing the field.
View Article and Find Full Text PDFLab Chip
August 2025
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA.
An essential capability of lab-on-a-chip systems is the precise handling, management, and transport of fluids within microfluidic channels. However, conventional rigid pump-tube-valve systems are often incompatible with emerging wearable and implantable devices, which demand miniaturization, low power consumption, high level of integration, and biocompatibility to ensure reliable and safe operation in biological environments. In recent years, various microscale fluid management and transport strategies have been developed to address these challenges, enabling actively programmable control and significantly advancing the capabilities of bio-integrated electronics.
View Article and Find Full Text PDFActa Biomater
July 2025
School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China.
The persistent challenges of miniaturization, energy inefficiency, and mechanical rigidity in conventional actuators have driven a paradigm shift toward bio-inspired material systems. The conductive polymer actuators (CPAs) exhibit unprecedented advantages in bio-integrated systems, characterized by millivolt-level electrochemical responsiveness, dynamic biomimetic proprioception, and tissue-like deformability. These attributes not only transcend the limitations of traditional actuation mechanisms but also create synergistic material-structure-function relationships with biological environments.
View Article and Find Full Text PDFNat Commun
July 2025
Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.
The increasing demand for continuous, comprehensive physiological information captured by skin-interfaced wireless sensors is hindered by their relatively high-power consumption and the associated patient discomfort that can follow from the use of high capacity batteries. This paper presents an adaptive electronics platform and a tri-modal energy harvesting approach to reduce the need for battery power. Specifically, the schemes focus on sensors that involve light in their operation, through use of (i) photometric methods, where ambient light contributes directly to the measurement process, (ii) multijunction photovoltaic cells, where ambient light powers operation and/or charges an integrated battery, and (iii) photoluminescent packaging, where ambient light activates light-emitting species to enhance the first two schemes.
View Article and Find Full Text PDFNanoscale Horiz
June 2025
Institute for Functional Intelligent Materials, National University of Singapore, 117544, Singapore.
The increasing demand for health monitoring, voice detection, electronic skins, and human-computer interaction has accelerated the development of highly sensitive, flexible, and miniaturized pressure and acoustic sensors. Among various sensing technologies, piezoresistive sensors offer advantages such as simple fabrication, low power consumption, and broad detection ranges, making them well-suited for detecting subtle vibrations and acoustic signals. However, traditional piezoresistive materials, including metals and semiconductors, are inherently stiff and brittle, limiting their integration into wearable electronics and bio-integrated devices.
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