논문 해외 국제전문학술지(SCI급) Two-Dimensional Disposable Graphene Sensor to Detect Na+ Ions
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-03
- 저자명 임준묵공동(참여),조승민,송광섭,장병국,인드리아트모코 M.N.,조다예,조해신,지안티 M.S.,전동철,오홍기
- 학술지명 NANOMATERIALS
- 발행처명 MDPI
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 10
홈페이지논문 초록 (Abstract)
The monitoring of Na+ ions distributed in the body has been indirectly calculated by the detection of Na+ ions in urine. We fabricated a two-dimensional (2D) Na+ ion sensor using a graphene ion-sensitive field-effect transistor (G-ISFET) and used fluorinated graphene as a reference electrode (FG-RE). We integrated G-ISFET and FG on a printed circuit board (PCB) designed in the form of a secure digital (SD) card to fabricate a disposable Na+ ion sensor. The sensitivity of the PCB tip to Na+ ions was determined to be -55.4 mV/dec. The sensor exhibited good linearity despite the presence of interfering ions in the buffer solution. We expanded the evaluation of the PCB tip to real human patient urine samples. The PCB tip exhibited a sensitivity of -0.36 mV/mM and linearly detected Na+ ions in human patient urine without any dilution process. We expect that G-ISFET with FG-RE can be used to realize a disposable Na+ ion sensor by serving as an alternative to Ag/AgCl reference electrodes.