Humidity Sensor Based on rGO-SDS Composite Film
Based on the humidity testing requirements in different environments, this paper investigates the humidity sensitivity of reduced graphene oxide (rGO)-sodium dodecyl sulfate (SDS) composite film humidity sensor. In the experiments, rGO-SDS dispersions with a concentration of 5 mg/mL were prepared, a...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/13/4/504 |
| _version_ | 1797434344041611264 |
|---|---|
| author | Cheng Lei Junna Zhang Ting Liang Ruifang Liu Zhujie Zhao Jijun Xiong Kai Yin |
| author_facet | Cheng Lei Junna Zhang Ting Liang Ruifang Liu Zhujie Zhao Jijun Xiong Kai Yin |
| author_sort | Cheng Lei |
| collection | DOAJ |
| description | Based on the humidity testing requirements in different environments, this paper investigates the humidity sensitivity of reduced graphene oxide (rGO)-sodium dodecyl sulfate (SDS) composite film humidity sensor. In the experiments, rGO-SDS dispersions with a concentration of 5 mg/mL were prepared, and a microelectromechanical system (MEMS) process was used to prepare the interdigital electrodes. The dispersions were then drop-coated on the interdigital electrodes and dried on a heated plate at 100 °C. The surface characteristics of the rGO-SDS films transferred onto SiO<sub>2</sub>-Si substrates were analyzed by scanning electron microscopy, raman spectroscopy and atomic force microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and tested by a correlation system, which showed a linear relationship between humidity variation and the resistance variation of the sensor in the ambient humidity range of 25–95% RH. At room temperature, the linearity of the sensor is about 0.98431 and the sensitivity is about 11.41432 Ω/% RH. At 100 °C, the correlation of the sensor is about 0.95046 and the sensitivity is about 1.0145 Ω/% RH; with a response time of only 9 s at ambient humidity from 25% RH to 95% RH, the sensor has very good repeatability and stability. |
| first_indexed | 2024-03-09T10:30:51Z |
| format | Article |
| id | doaj.art-2009e47c2e0c42c4b37b9f9685e1a597 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T10:30:51Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-2009e47c2e0c42c4b37b9f9685e1a5972023-12-01T21:14:21ZengMDPI AGMicromachines2072-666X2022-03-0113450410.3390/mi13040504Humidity Sensor Based on rGO-SDS Composite FilmCheng Lei0Junna Zhang1Ting Liang2Ruifang Liu3Zhujie Zhao4Jijun Xiong5Kai Yin6State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, ChinaState Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, ChinaState Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, ChinaDepartment of Energy Technology, Aalborg University, 9220 Aalborg, DenmarkBased on the humidity testing requirements in different environments, this paper investigates the humidity sensitivity of reduced graphene oxide (rGO)-sodium dodecyl sulfate (SDS) composite film humidity sensor. In the experiments, rGO-SDS dispersions with a concentration of 5 mg/mL were prepared, and a microelectromechanical system (MEMS) process was used to prepare the interdigital electrodes. The dispersions were then drop-coated on the interdigital electrodes and dried on a heated plate at 100 °C. The surface characteristics of the rGO-SDS films transferred onto SiO<sub>2</sub>-Si substrates were analyzed by scanning electron microscopy, raman spectroscopy and atomic force microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and tested by a correlation system, which showed a linear relationship between humidity variation and the resistance variation of the sensor in the ambient humidity range of 25–95% RH. At room temperature, the linearity of the sensor is about 0.98431 and the sensitivity is about 11.41432 Ω/% RH. At 100 °C, the correlation of the sensor is about 0.95046 and the sensitivity is about 1.0145 Ω/% RH; with a response time of only 9 s at ambient humidity from 25% RH to 95% RH, the sensor has very good repeatability and stability.https://www.mdpi.com/2072-666X/13/4/504rGO-SDShumiditytestsensitivity |
| spellingShingle | Cheng Lei Junna Zhang Ting Liang Ruifang Liu Zhujie Zhao Jijun Xiong Kai Yin Humidity Sensor Based on rGO-SDS Composite Film Micromachines rGO-SDS humidity test sensitivity |
| title | Humidity Sensor Based on rGO-SDS Composite Film |
| title_full | Humidity Sensor Based on rGO-SDS Composite Film |
| title_fullStr | Humidity Sensor Based on rGO-SDS Composite Film |
| title_full_unstemmed | Humidity Sensor Based on rGO-SDS Composite Film |
| title_short | Humidity Sensor Based on rGO-SDS Composite Film |
| title_sort | humidity sensor based on rgo sds composite film |
| topic | rGO-SDS humidity test sensitivity |
| url | https://www.mdpi.com/2072-666X/13/4/504 |
| work_keys_str_mv | AT chenglei humiditysensorbasedonrgosdscompositefilm AT junnazhang humiditysensorbasedonrgosdscompositefilm AT tingliang humiditysensorbasedonrgosdscompositefilm AT ruifangliu humiditysensorbasedonrgosdscompositefilm AT zhujiezhao humiditysensorbasedonrgosdscompositefilm AT jijunxiong humiditysensorbasedonrgosdscompositefilm AT kaiyin humiditysensorbasedonrgosdscompositefilm |