| 학회 | 한국재료학회 |
| 학술대회 | 2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 | 24권 1호 |
| 발표분야 | 5. 화학센서용 기능성 소재(Chemical sensors)-오거나이저: 장호원 교수(서울대) |
| 제목 | Self-activated transparent flexible graphene gas sensor array operating at room temperature |
| 초록 | Internet of Everything (IoE) refers to billions of objects having intelligent connections with processed data. Sensors is an essential component of the IoE since they analyze the internal and external conditions of objects. Graphene is regarded as a promising material for next-generation gas sensing applications due to its unique properties such as high response to gas molecules, and low noise level. Moreover, as wearable and transparent devices are receiving increasing attention, developing bendable and transparent smart gas sensors becomes a major research field for the future electronics. Conventional gas sensors have major drawbacks in terms of selectivity, and response and recovery speed. In order to overcome the problems, various approaches have been explored through functionalization, noble metal decoration, and integration of single sensors into an array. Among the methods, designing sensor array appear to be a strong candidate because it easily broadens the potential of individual sensors via an additional signal analysis without any manipulation on each sensor. Here, we present entirely flexible 2×2 graphene sensor array operating at room temperature without external heating. The graphene sensing layers are synthesized by chemical vapor deposition method and defined by a simple lithography process. Each graphene sensor is decorated with different noble metals. The responses of the graphene sensor array upon exposure to NH3, H2, C2H5OH, and NO2 are investigated by principle component analysis. This highly selective, transparent, and flexible graphene sensor array will open a new era of gas sensors. |
| 저자 | 김연후, 장호원 |
| 소속 | 서울대 |
| 키워드 | Graphene; Two-dimensional materials; Chemoresistive gas sensor; Sensor array; IoT; Wearable device |
