title: Wireless, Room Temperature Volatile Organic Compound Sensor Based on Polypyrrole Nanoparticle Immobilized Ultrahigh Frequency Radio Frequency Identification Tag.
abstract: Due to rapid advances in technology which have contributed to the development of portable equipment, highly sensitive and selective sensor technology is in demand. In particular, many approaches to the modification of wireless sensor systems have been studied. Wireless systems have many advantages, including unobtrusive installation, high nodal densities, low cost, and potential commercial applications. In this study, we fabricated radio frequency identification (RFID)-based wireless sensor systems using carboxyl group functionalized polypyrrole (C-PPy) nanoparticles (NPs). The C-PPy NPs were synthesized via chemical oxidation copolymerization, and then their electrical and chemical properties were characterized by a variety of methods. The sensor system was composed of an RFID reader antenna and a sensor tag made from a commercially available ultrahigh frequency RFID tag coated with C-PPy NPs. The C-PPy NPs were covalently bonded to the tag to form a passive sensor. This type of sensor can be produced at a very low cost and exhibits ultrahigh sensitivity to ammonia, detecting concentrations as low as 0.1 ppm. These sensors operated wirelessly and maintained their sensing performance as they were deformed by bending and twisting. Due to their flexibility, these sensors may be used in wearable technologies for sensing gases.
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Jaemoon
authors.initials: J
authors.lastname: Jun
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Jungkyun
authors.initials: J
authors.lastname: Oh
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Shin
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Sung Gun
authors.initials: SG
authors.lastname: Kim
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Jun Seop
authors.initials: JS
authors.lastname: Lee
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Wooyoung
authors.initials: W
authors.lastname: Kim
authors.affiliation: School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU) , 599 Gwanangno, Gwanak-gu, Seoul 151-742, Korea.
authors.forename: Jyongsik
authors.initials: J
authors.lastname: Jang
keywords: RFID tag; polypyrrole; sensor; volatile organic compound; wireless