3D Printed Disposable Wireless Ion Sensors with Biocompatible Cellulose Composites. (19th December 2018)

• Record Type: Journal Article
• Authors: Kim, Taeil; Bao, Chao; Hausmann, Michael; Siqueira, Gilberto; Zimmermann, Tanja; Kim, Woo Soo
• Is Part Of: Advanced Electronic Materials. Volume 5:Number 2(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-12-19
• Subjects: 3D printing -- cellulose nanofibers -- electrochemical sensors -- wireless radiofrequency sensor; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201800778
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: As the wireless communication technologies are becoming more crucial for internet‐of‐things (IoT) electronic devices, sensors have also been equipped with wireless data collection. A conventional way to make wireless sensor systems is to develop active sensor devices with silicon‐based chip technologies integrated with an amplifier, a battery, a converter, among others. However, it is difficult to generate disposable inexpensive flexible sensors with all these rigid components. Here, 3D printed disposable wireless ion selective sensor systems with unique form factors, high sensitivity, and flexibility are reported. A 3D printable conductive ink is designed and optimized with cellulose nanofibers by addition of silver nanowires for sustainable and biocompatible sensor applications. Polyimide film which has high surface hydrophobicity is used as a substrate for better resolution of printing. The 3D printed wireless sensor system includes inductor–capacitor circuits, and ion selective membrane electrodes, which can detect quantitative ion concentrations selectively. The change of ion concentrations is detected by measuring the magnitude of S 11, reflective coefficient at the resonant frequency of 2.36 GHz using a vector network analyzer. The demonstrated sensitivity is 3.4%/m for ammonium ion (NH4 + ). Abstract : 3D printed disposable wireless ion selective sensor systems with high selectivity and sensitivity are reported. The 3D printed wireless sensor system includes ion selective membrane electrodes and an inductor–capacitor circuit. The sensor is 3D printed with a conductive ink formulated with cellulose nanofibers and silver nanowires. This wireless sensor system detects primary ions selectively with sensitivity of 3.4%m –1 .