Author: umeshinlab
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Multi-material 3D printing technology: integrated preparation of polymers and metals
Existing three-dimensional (3D) printing technologies, both polymer-based and metal-based, can only fabricate (only) plastic structures or (only) metal structures, which severely limits the application of additive manufacturing technologies in electronics such as IOT, ICT and robotics. Electronic devices are usually composed of both functional plastics and metals, including sensors and micro-actuators. They are connected together…
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Reconstructed Attractor for Life State Detection
This study evaluates physiological states of organisms from a nonlinear system perspective. Taking the human body as an example, the running states of heart and blood vessels are obtained by collecting ECG and PPG signals, and the feature extraction of complex physiological signals is applied by chaotic attractor reconstructions. Digital life state monitoring will provide…
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Dye sensitized organic solar cells
This study explores the synergistic integration of natural fruit-derived dyes, extracted from diverse fruits, including raspberry and pomegranate, within the framework of Dye-Sensitized Solar Cells (DSSC). Concurrently, it employs an innovative approach involving the electro-spraying technique to deposit titanium oxide, optimizing its interface within the solar cell structure. The investigation delves into the extraction and…
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Sodium ion sensors for continuous monitoring in sporting activities
The development of wearable biosensors has garnered significant interest in the realm of real-time health monitoring. Here, we introduce a novel eTattoo equipped with sodium ion sensors, offering a breakthrough in continuous ionic monitoring. The eTattoo, designed with flexible and biocompatible materials, integrates ion-selective electrodes capable of detecting sodium ions with high sensitivity and specificity.…
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Mental Stress Assessment in Daily Life Using Electrocardiogram and Pulse Wave
It is believed that quantification and monitoring of daily stress can lead to prevention of various stress-related diseases. In this study, we integrated simultaneously measured electrocardiograms and pulse waves to calculate highly accurate stress values that are not easily affected by noise, and calculated the reliability of each biological signal in a defined analysis interval…
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Simultaneous measurement of contractile force and field potential of dynamically beating human iPS cell-derived cardiac cell sheet-tissue with flexible electronics
Human-induced pluripotent stem (iPS) cell-derived cardiomyocytes are widely employed in global in vitro studies for both pharmacological and pathological research. Specifically, evaluating the functionality of heart tissues generated from these iPS cell-derived cardiomyocytes holds the promise of accurately predicting the effects of drugs, thereby streamlining the drug development process. Nevertheless, the existing method of assessing…
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New Metal-Plastic Hybrid 3D Printer for electronic miniaturization
Building precise metal patterns on complex three-dimensional (3D) plastic parts allows for the manufacture of functional devices for advanced applications. However, it is currently expensive and requires complex processes. To address these issues, our lab is developing a technique to fabricate 3D metal-plastic composite structures with arbitrarily complex shapes. The cured resin is modified to…
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Summary of bioengineering activities in our laboratory
Bioengineering, as a comprehensive subject has many applications and reach many achievements in our life. Like3D printed tissue, DNA editing technique, or culturing transgenic plants. Because of so many important usage cases, this subject is now wildly developed.Among bioengineering, there are many subdisciplines like Synthetic biology and genetic engineering. Tissue engineering, as one of them,…
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Solar Cells: Dye-Sensitive Solar Cells & Perovskite Solar Cells
One of the major social concerns that has plagued humanity for centuries is the energy issue. Humanity must search for alternate renewable and clean energy sources as the supply of non-renewable energy sources declines. Among all renewable energy sources, including hydro, wind, bio, and ocean energy, the total amount of solar energy that the Earth…
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Wearable Electronics: Smart Face Mask Based on an Ultrathin Pressure Sensor for Wireless Monitoring of Breath Conditions
Deaths from sudden cardiac disease have been at a high level among causes of mortality during the past ten years, according to WHO statistics. Long-term ECG monitoring of the human body is frequently necessary for the approach of preventing and treating sudden cardiac illness. Many diseases, including sudden cardiac disease, will lead to minor alterations…