Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol
Two methods for cross-selectivity enhancement of porous poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/carbon black (CB) composite-based resistive sensors are provided. The sensors are tested with acetone and ethanol in the presence of humid air. Cross-selectivity is enhanced using two dif...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-03-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/3/595 |
| _version_ | 1798043537496866816 |
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| author | Ali Daneshkhah Sudhir Shrestha Amanda Siegel Kody Varahramyan Mangilal Agarwal |
| author_facet | Ali Daneshkhah Sudhir Shrestha Amanda Siegel Kody Varahramyan Mangilal Agarwal |
| author_sort | Ali Daneshkhah |
| collection | DOAJ |
| description | Two methods for cross-selectivity enhancement of porous poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/carbon black (CB) composite-based resistive sensors are provided. The sensors are tested with acetone and ethanol in the presence of humid air. Cross-selectivity is enhanced using two different methods to modify the basic response of the PVDF-HFP/CB sensing platform. In method I, the adsorption properties of PVDF-HFP/CB are altered by adding a polyethylene oxide (PEO) layer or by treating with infrared (IR). In method II, the effects of the interaction of acetone and ethanol are enhanced by adding diethylene carbonate (DEC) or PEO dispersed in DEC (PEO/DEC) to the film. The results suggest the approaches used in method I alter the composite ability to adsorb acetone and ethanol, while in method II, they alter the transduction characteristics of the composite. Using these approaches, sensor relative response to acetone was increased by 89% compared with the PVDF-HFP/CB untreated film, whereas sensor relative response to ethanol could be decreased by 57% or increased by 197%. Not only do these results demonstrate facile methods for increasing sensitivity of PVDF-HFP/CB film, used in parallel they demonstrate a roadmap for enhancing system cross-selectivity that can be applied to separate units on an array. Fabrication methods, experimental procedures and results are presented and discussed. |
| first_indexed | 2024-04-11T22:50:26Z |
| format | Article |
| id | doaj.art-0c2c84c2c1554d5fac21f7b083335219 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:50:26Z |
| publishDate | 2017-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0c2c84c2c1554d5fac21f7b0833352192022-12-22T03:58:36ZengMDPI AGSensors1424-82202017-03-0117359510.3390/s17030595s17030595Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and EthanolAli Daneshkhah0Sudhir Shrestha1Amanda Siegel2Kody Varahramyan3Mangilal Agarwal4Department of Electrical and Computer Engineering, Indiana University–Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USADepartment of Electrical and Computer Engineering, Indiana University–Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USAIntegrated Nanosystems Development Institute (INDI), Indiana University–Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USADepartment of Electrical and Computer Engineering, Indiana University–Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USAIntegrated Nanosystems Development Institute (INDI), Indiana University–Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, USATwo methods for cross-selectivity enhancement of porous poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/carbon black (CB) composite-based resistive sensors are provided. The sensors are tested with acetone and ethanol in the presence of humid air. Cross-selectivity is enhanced using two different methods to modify the basic response of the PVDF-HFP/CB sensing platform. In method I, the adsorption properties of PVDF-HFP/CB are altered by adding a polyethylene oxide (PEO) layer or by treating with infrared (IR). In method II, the effects of the interaction of acetone and ethanol are enhanced by adding diethylene carbonate (DEC) or PEO dispersed in DEC (PEO/DEC) to the film. The results suggest the approaches used in method I alter the composite ability to adsorb acetone and ethanol, while in method II, they alter the transduction characteristics of the composite. Using these approaches, sensor relative response to acetone was increased by 89% compared with the PVDF-HFP/CB untreated film, whereas sensor relative response to ethanol could be decreased by 57% or increased by 197%. Not only do these results demonstrate facile methods for increasing sensitivity of PVDF-HFP/CB film, used in parallel they demonstrate a roadmap for enhancing system cross-selectivity that can be applied to separate units on an array. Fabrication methods, experimental procedures and results are presented and discussed.http://www.mdpi.com/1424-8220/17/3/595acetone sensorethanol sensorvolatile organic compoundsPVDF-HFP/carbon black compositelow water sensitivity |
| spellingShingle | Ali Daneshkhah Sudhir Shrestha Amanda Siegel Kody Varahramyan Mangilal Agarwal Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol Sensors acetone sensor ethanol sensor volatile organic compounds PVDF-HFP/carbon black composite low water sensitivity |
| title | Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol |
| title_full | Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol |
| title_fullStr | Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol |
| title_full_unstemmed | Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol |
| title_short | Cross-Selectivity Enhancement of Poly(vinylidene fluoride-hexafluoropropylene)-Based Sensor Arrays for Detecting Acetone and Ethanol |
| title_sort | cross selectivity enhancement of poly vinylidene fluoride hexafluoropropylene based sensor arrays for detecting acetone and ethanol |
| topic | acetone sensor ethanol sensor volatile organic compounds PVDF-HFP/carbon black composite low water sensitivity |
| url | http://www.mdpi.com/1424-8220/17/3/595 |
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