Highly Concentrated,Conductive,Defect-free Graphene Ink for Screen-Printed Sensor Application

作     者：Dong Seok Kim Jae-Min Jeong Hong Jun Park Yeong Kyun Kim Kyoung G.Lee Bong Gill Choi Dong Seok Kim;Jae-Min Jeong;Hong Jun Park;Yeong Kyun Kim;Kyoung G.Lee;Bong Gill Choi

作者机构：Department of Chemical EngineeringKangwon National UniversitySamcheokGangwon-do 25913Republic of Korea Resources Utilization Research CenterKorea Institute of Geoscience and Mineral ResourcesDaejeon 34132Republic of Korea Center for Nano Bio DevelopmentNational Nanofab CenterDaejeon 34141Republic of Korea 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2021年第13卷第6期

页      面：17-30页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080202[工学-机械电子工程] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0822[工学-轻工技术与工程] 0702[理学-物理学] 

基　　金：the National Research Foundation of Korea(NRF)Grant funded by the Ministry of Science and ICT(No.2021R1A2C1009926) “Basic project(referring to projects performed with the budget directly contributed by the Government to achieve the purposes of establishment of Government-funded research Institutes)” supported by the KOREA RESEARCH INSTITUTE of CHEMICAL TECHNOLOGY(KRICT)(SS2042-10) Basic research project(Project:21-3212-1)of the Korea institute of Geoscience Mineral resources funded by the Ministry of Science and ICT of Korea by Nanomedical Devices Development Project of NNFC in 2021. 

主　　题：Graphene ink Fluid dynamics Screen printing Ion sensor Real-time monitoring 

摘      要：Conductive inks based on graphene materials have received significant attention for the fabrication of a wide range of printed and flexible devices.However,the application of graphene fillers is limited by their restricted mass production and the low concentration of their suspensions.In this study,a highly concentrated and conductive ink based on defect-free graphene was developed by a scalable fluid dynamics process.A high shear exfoliation and mixing process enabled the production of graphene at a high concentration of 47.5 mg mL^(−1)for graphene ink.The screen-printed graphene conductor exhibits a high electrical conductivity of 1.49×10^(4)S m^(−1)and maintains high conductivity under mechanical bending,compressing,and fatigue tests.Based on the as-prepared graphene ink,a printed electrochemical sodium ion(Na^(+))sensor that shows high potentiometric sensing performance was fabricated.Further,by integrating a wireless electronic module,a prototype Na^(+)-sensing watch is demonstrated for the real-time monitoring of the sodium ion concentration in human sweat during the indoor exercise of a volunteer.The scalable and efficient procedure for the preparation of graphene ink presented in this work is very promising for the low-cost,reproducible,and large-scale printing of flexible and wearable electronic devices.