Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates
Sensitivity is one of the crucial factors in determining the quality of a fluorescence/phosphorescence-based gas sensor, and is estimated from the measurement of responses (I<sub>0</sub>/I, where I<sub>0</sub> and I refer to the measured optical intensity of a sensor in absen...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Biosensors |
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| Online Access: | https://www.mdpi.com/2079-6374/12/10/774 |
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| author | Chih-Yi Liu Annada Sankar Sadhu Riya Karmakar Cheng-Shane Chu Yi-Nan Lin Shih-Hsin Chang Goutam Kumar Dalapati Sajal Biring |
| author_facet | Chih-Yi Liu Annada Sankar Sadhu Riya Karmakar Cheng-Shane Chu Yi-Nan Lin Shih-Hsin Chang Goutam Kumar Dalapati Sajal Biring |
| author_sort | Chih-Yi Liu |
| collection | DOAJ |
| description | Sensitivity is one of the crucial factors in determining the quality of a fluorescence/phosphorescence-based gas sensor, and is estimated from the measurement of responses (I<sub>0</sub>/I, where I<sub>0</sub> and I refer to the measured optical intensity of a sensor in absence and presence of analyte molecules) at various concentrations of analytes. In this work, we demonstrate phosphorescence-based optical oxygen sensors fabricated on highly porous anodic aluminum oxide (AAO) membranes showing dramatically high response. These sensors exploit the enormous surface area of the AAO to facilitate the effective interaction between the sensing molecules and the analytes. We spin-coat an AAO membrane (200 nm pore diameter) with a platinum-based oxygen sensing porphyrin dye, platinum(II) meso-tetrakis (pentafluorophenyl) porphyrin (PtTFPP), to fabricate a sensor exhibiting I<sub>0</sub>/I ~400 at 100% oxygen atmosphere. To address the generality of the AAO membrane, we fabricate a separate sensor with another porphyrin dye, platinum octaethylporphyrin (PtOEP), which exhibits an even higher I<sub>0</sub>/I of ~500. Both of these sensors offer the highest responses as an optical oxygen sensor hitherto reported. SEM and EDS analysis are performed to realize the effect of the increased surface area of the AAO membrane on the enhanced sensitivity. |
| first_indexed | 2024-03-09T20:35:43Z |
| format | Article |
| id | doaj.art-2e703857a40b48459ab524a7321c8f11 |
| institution | Directory Open Access Journal |
| issn | 2079-6374 |
| language | English |
| last_indexed | 2024-03-09T20:35:43Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biosensors |
| spelling | doaj.art-2e703857a40b48459ab524a7321c8f112023-11-23T23:10:26ZengMDPI AGBiosensors2079-63742022-09-01121077410.3390/bios12100774Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous SubstratesChih-Yi Liu0Annada Sankar Sadhu1Riya Karmakar2Cheng-Shane Chu3Yi-Nan Lin4Shih-Hsin Chang5Goutam Kumar Dalapati6Sajal Biring7Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, TaiwanOrganic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, TaiwanOrganic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, TaiwanOrganic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, TaiwanDepartment of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, TaiwanMSSCORPS Co., Ltd., Hsinchu 300047, TaiwanSunkonnect Pte Ltd., 1 Cleantech Loop, Singapore 637141, SingaporeOrganic Electronics Research Center, Ming Chi University of Technology, New Taipei City 24301, TaiwanSensitivity is one of the crucial factors in determining the quality of a fluorescence/phosphorescence-based gas sensor, and is estimated from the measurement of responses (I<sub>0</sub>/I, where I<sub>0</sub> and I refer to the measured optical intensity of a sensor in absence and presence of analyte molecules) at various concentrations of analytes. In this work, we demonstrate phosphorescence-based optical oxygen sensors fabricated on highly porous anodic aluminum oxide (AAO) membranes showing dramatically high response. These sensors exploit the enormous surface area of the AAO to facilitate the effective interaction between the sensing molecules and the analytes. We spin-coat an AAO membrane (200 nm pore diameter) with a platinum-based oxygen sensing porphyrin dye, platinum(II) meso-tetrakis (pentafluorophenyl) porphyrin (PtTFPP), to fabricate a sensor exhibiting I<sub>0</sub>/I ~400 at 100% oxygen atmosphere. To address the generality of the AAO membrane, we fabricate a separate sensor with another porphyrin dye, platinum octaethylporphyrin (PtOEP), which exhibits an even higher I<sub>0</sub>/I of ~500. Both of these sensors offer the highest responses as an optical oxygen sensor hitherto reported. SEM and EDS analysis are performed to realize the effect of the increased surface area of the AAO membrane on the enhanced sensitivity.https://www.mdpi.com/2079-6374/12/10/774anodic aluminum oxideoptical gas sensoroxygen sensingPtTFPPPtOEPsensitivity |
| spellingShingle | Chih-Yi Liu Annada Sankar Sadhu Riya Karmakar Cheng-Shane Chu Yi-Nan Lin Shih-Hsin Chang Goutam Kumar Dalapati Sajal Biring Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates Biosensors anodic aluminum oxide optical gas sensor oxygen sensing PtTFPP PtOEP sensitivity |
| title | Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates |
| title_full | Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates |
| title_fullStr | Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates |
| title_full_unstemmed | Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates |
| title_short | Strongly Improving the Sensitivity of Phosphorescence-Based Optical Oxygen Sensors by Exploiting Nano-Porous Substrates |
| title_sort | strongly improving the sensitivity of phosphorescence based optical oxygen sensors by exploiting nano porous substrates |
| topic | anodic aluminum oxide optical gas sensor oxygen sensing PtTFPP PtOEP sensitivity |
| url | https://www.mdpi.com/2079-6374/12/10/774 |
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