An intrinsically stretchable multi-biochemical sensor for sweat analysis using photo-patternable ecoflex  

作　　者：Seungwan Kim Joohyuk Kang Injun Lee Jinhyeong Jang Chan Beum Park Wonryung Lee Byeong-Soo Bae 

机构地区：[1]Wearable Platform Materials Technology Center(WMC),291 Daehak-ro,Yuseong-gu,Daejeon 34141,Republic of Korea [2]Department of Materials Science and Engineering,Korea Advanced Institute of Science and Technology(KAIST),291 Daehak-ro,Yuseong-gu,Daejeon 34141,Republic of Korea [3]Center for Theragnosis,Biomedical Research Institute,KIST,Seoul 02792,Republic of Korea

出　　处：《npj Flexible Electronics》2023年第1期220-228,共9页npj-柔性电子（英文）

基　　金：supported by the Wearable Platform Materials Technology Center(WMC)funded by the National Research Foundation of Korea(NRF)grant by the Korea Government(MSIT)(NRF-2022R1A5A6000846,NRF-2021M3D1A2049869,NRF-2020M3H4A3106405);supported by Nano Material Technology Development Program(2021M3H4A1A04092879)through the National Research Foundation of Korea funded by the Ministry of Science and ICT.

摘　　要：Ecoflex is widely used in bioelectronics due to its outstanding properties of low modulus and large stretchability.For its use as an encapsulation layer in multi-channel wearable devices,a patterning procedure is essential.However,conventional patterning strategies for Ecoflex,such as soft lithography,punching,and laser ablation,lack sufficient quality and process compatibility.To address this,we propose a process-compatible method of patterning Ecoflex by developing Photo-patternable Ecoflex(PPE).The PPE layer,used as an encapsulation layer,effectively dissipates strain energy at homogeneous interfaces,resulting in a 50%increase in electrical conductance under 250%strain.Using PPE,we fabricated intrinsically stretchable multi-sensors that monitor bio-signals like glucose,lactate,pH,and humidity in sweat.These sensors maintain durable sensitivity under strain up to 50%and for 1000 cycles at 20%strain.Finally,we mounted these stretchable multi-chemical sensors on an arm to monitor glucose and lactate levels in sweat.

关 键 词：LITHOGRAPHY pattern INTRINSIC 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]