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Highly Sensitive Pseudocapacitive iontronic Pressure sensor with Broad Sensing Range

Nano-Micro Letters 2021年第9期13卷 209-222页

作者： Libo Gao Meng Wang Weidong Wang Hongcheng Xu Yuejiao Wang Haitao Zhao Ke Cao Dandan Xu Lei Li School of Mechano-Electronic Engineering Xidian UniversityXian 710071ShaanxiP.R.China CityU-Xidian Joint Laboratory of Micro/Nano-Manufacturing Shenzhen 518057P.R.China Department of Mechanical Engineering City University of Hong KongKowloon 999077Hong Kong SARP.R.China Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongP.R.China State Key Laboratory for Mechanical Behavior of Materials Xian Jiaotong UniversityNo.28Xianning West RoadXian 710049ShaanxiP.R.China

Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and ***,improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge,which hinders the devices’practical *** this obstacle,we developed a Ti_(3)C_(2)T_(x)-derived iontronic pressure sensor(TIPS)by taking the advantages of the high intercalation pseudocapacitance under high pressure and rationally designed structural *** achieved an ultrahigh sen-sitivity(S_(min)>200 kPa^(−1),S_(max)>45,000 kPa^(−1))in a broad sensing range of over 1.4 MPa and low limit of detection of 20 Pa as well as stable long-term working durability for 10,000 *** practical application of TIPS in physical activity monitoring and flexible robot manifested its versatile *** study provides a demonstration for exploring pseudocapacitive materials for building flexible iontronic sensors with ultrahigh sensitivity and sensing range to advance the development of high-performance wearable electronics.

关键词： iontronic sensor Flexible electronics Pressure sensor Pseudocapacitance Ti_(3)C_(2)T_(x)MXene

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Displacement-pressure biparametrically regulated softness sensory system for intraocular pressure monitoring

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National Science Review 2024年第6期11卷 159-168页

作者： Yu Cheng Yifei Zhan Fangyi Guan Junli Shi Jingxiao Wang Yi Sun Muhammad Zubair Cunjiang Yu Chuan Fei Guo Department of Materials Science and Engineering Southern University of Science and Technology Department of Engineering Science and Mechanics Pennsylvania State University Department of Biomedical Engineering Pennsylvania State University Department of Materials Science and Engineering Materials Research Institute Pennsylvania State University

High intraocular pressure(IOP) is one of the high-risk pathogenic factors of glaucoma. Existing methods of IOP measurement are based on the direct interaction with the cornea. Commercial ophthalmic tonometers based on snapshot measurements are expensive, bulky, and their operation requires trained *** contact lenses are easy to use, but they may block vision and cause infection. Here, we report a sensory system for IOP assessment that uses a soft indentor with two asymmetrically deployed iontronic flexible pressure sensors to interact with the eyelid-eyeball in an eye-closed situation. Inspired by human fingertip assessment of softness, the sensory system extracts displacement-pressure information for soft evaluation, achieving high accuracy IOP monitoring(>96%). We further design and custom-make a portable and wearable ophthalmic tonometer based on the sensory system and demonstrate its high efficacy in IOP screening. This sensory system paves a way towards cost-effective, robust, and reliable IOP monitoring.

关键词： intraocular pressure tonometer deep learning softness iontronic sensor

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