Mechanical Engineering Spring Seminar Series: Class 530.804
“MECHANICS AND MANUFACTURE OF WEARABLE E-TATTOOS”
Presented by Professor Nanshu Lu
University of Texas at Austin
Merging human body with electronics and machines can enable internet of health (IoH), human-machine interface (HMI), as well as augmented human capabilities. However, bio-tissues are soft, curvilinear and dynamic whereas wafer-based electronics are hard, planar, and rigid. Over the past decade, stretchable electronics have emerged as a result of new structural design and manufacturing processes. In particular, epidermal electronics, a.k.a. electronic tattoos (e-tattoos), represent a class of stretchable circuits, sensors, and stimulators that are ultrathin, ultrasoft and skin-conformable. This talk will address the stretchability, conformability, and sensitivity of soft bioelectronics. It will introduce a dry and freeform “cut-solder-paste” process for the rapid prototyping of wireless e-tattoos. This method is applicable for thin film metals, polymers, ceramics, as well as 2D materials. The e-tattoos can laminate at different locations of human skin for the synchronous and continuous tracking of electrophysiology (ECG, EEG, EMG, EOG), mechanophysiology (respiration, seismocardiogram, blood pressure, etc.), as well as thermophysiology etc.. In addition to sensing, the e-tattoos can also be used as personalized treatment and therapeutic devices. For wireless operation, we leverage near field communication (NFC) for wireless charging and Bluetooth low energy (BLE) for wireless data transfer. A vision for closed-loop wearables for sensing, diagnosis, and treatment will be presented.
Dr. Nanshu Lu is currently Temple Foundation Endowed Associate Professor at the University of Texas at Austin. She received her B.Eng. from Tsinghua University, Beijing, Ph.D. from Harvard University, and then Beckman Postdoctoral Fellowship at UIUC. Her research concerns the mechanics, materials, manufacture, and human integration of soft electronics. She has published more than 85 journal articles with more than 12,000 citations. She has been named 35 innovators under 35 by MIT Technology Review (TR 35) and has received NSF CAREER Award and multiple DOD Young Investigator Awards.