Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit
In recent years, hydrogen energy has garnered attention as a potential solution for mitigating greenhouse gas emissions. However, concerns regarding the inherent risk of hydrogen gas leakage and potential explosions have necessitated the development of advanced sensors. Within our research group, we...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/24/2/548 |
| _version_ | 1797339342354513920 |
|---|---|
| author | Shoki Wakabayashi Yuki Oh Haruhito Nakayama Jin Wang Toshihiko Kiwa |
| author_facet | Shoki Wakabayashi Yuki Oh Haruhito Nakayama Jin Wang Toshihiko Kiwa |
| author_sort | Shoki Wakabayashi |
| collection | DOAJ |
| description | In recent years, hydrogen energy has garnered attention as a potential solution for mitigating greenhouse gas emissions. However, concerns regarding the inherent risk of hydrogen gas leakage and potential explosions have necessitated the development of advanced sensors. Within our research group, we have innovated an ultrathin platinum (Pt) film hydrogen sensor that gauges resistance changes in Pt thin films when exposed to hydrogen gas. Notably, the sensitivity of each sensor is contingent upon the thickness of the Pt film. To address the challenge of detecting hydrogen using multiple sensors, we integrated the ultrathin Pt film as a resistance element within a twin-T type notch filter. This filter exhibits a distinctive reduction in output signals at a specific frequency. The frequency properties of the notch filter dynamically alter with changes in the resistance of the Pt film induced by hydrogen exposure. Consequently, the ultrathin Pt film hydrogen sensor monitors output signal variations around the notch frequency, responding to shifts in frequency properties. This innovative approach enables the electrical control of sensor sensitivity by adjusting the operating frequency in proximity to the notch frequency. Additionally, the simultaneous detection of hydrogen by multiple sensors was successfully achieved by interconnecting sensors with distinct notch frequencies in series. |
| first_indexed | 2024-03-08T09:46:35Z |
| format | Article |
| id | doaj.art-61d0f011f3eb4e7492be8e4ee85d74c7 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-08T09:46:35Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-61d0f011f3eb4e7492be8e4ee85d74c72024-01-29T14:16:15ZengMDPI AGSensors1424-82202024-01-0124254810.3390/s24020548Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter CircuitShoki Wakabayashi0Yuki Oh1Haruhito Nakayama2Jin Wang3Toshihiko Kiwa4Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, JapanGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, JapanGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, JapanGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, JapanGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, JapanIn recent years, hydrogen energy has garnered attention as a potential solution for mitigating greenhouse gas emissions. However, concerns regarding the inherent risk of hydrogen gas leakage and potential explosions have necessitated the development of advanced sensors. Within our research group, we have innovated an ultrathin platinum (Pt) film hydrogen sensor that gauges resistance changes in Pt thin films when exposed to hydrogen gas. Notably, the sensitivity of each sensor is contingent upon the thickness of the Pt film. To address the challenge of detecting hydrogen using multiple sensors, we integrated the ultrathin Pt film as a resistance element within a twin-T type notch filter. This filter exhibits a distinctive reduction in output signals at a specific frequency. The frequency properties of the notch filter dynamically alter with changes in the resistance of the Pt film induced by hydrogen exposure. Consequently, the ultrathin Pt film hydrogen sensor monitors output signal variations around the notch frequency, responding to shifts in frequency properties. This innovative approach enables the electrical control of sensor sensitivity by adjusting the operating frequency in proximity to the notch frequency. Additionally, the simultaneous detection of hydrogen by multiple sensors was successfully achieved by interconnecting sensors with distinct notch frequencies in series.https://www.mdpi.com/1424-8220/24/2/548hydrogen sensorultrathin filmtwin-Tnotch filterplatinum |
| spellingShingle | Shoki Wakabayashi Yuki Oh Haruhito Nakayama Jin Wang Toshihiko Kiwa Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit Sensors hydrogen sensor ultrathin film twin-T notch filter platinum |
| title | Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit |
| title_full | Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit |
| title_fullStr | Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit |
| title_full_unstemmed | Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit |
| title_short | Ultrathin Platinum Film Hydrogen Sensors with a Twin-T Type Notch Filter Circuit |
| title_sort | ultrathin platinum film hydrogen sensors with a twin t type notch filter circuit |
| topic | hydrogen sensor ultrathin film twin-T notch filter platinum |
| url | https://www.mdpi.com/1424-8220/24/2/548 |
| work_keys_str_mv | AT shokiwakabayashi ultrathinplatinumfilmhydrogensensorswithatwinttypenotchfiltercircuit AT yukioh ultrathinplatinumfilmhydrogensensorswithatwinttypenotchfiltercircuit AT haruhitonakayama ultrathinplatinumfilmhydrogensensorswithatwinttypenotchfiltercircuit AT jinwang ultrathinplatinumfilmhydrogensensorswithatwinttypenotchfiltercircuit AT toshihikokiwa ultrathinplatinumfilmhydrogensensorswithatwinttypenotchfiltercircuit |