Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing
In the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2007-09-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/7/9/1871/ |
| _version_ | 1818035685263671296 |
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| author | Ralf Moos Perena Gouma Kathy Sahner |
| author_facet | Ralf Moos Perena Gouma Kathy Sahner |
| author_sort | Ralf Moos |
| collection | DOAJ |
| description | In the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested successfully. All of these sensor devicesshowed improved sensor functionality in comparison to conventional microscaled thickfilms. In order to explain the impact of the enhanced surface-to-volume ratio on sensorproperties in a quantitative way, a mechanistic model was applied to micro- and nanoscaleddevices. In contrast to the conventional diffusion-reaction model that has been proposed forn-type semiconducting sensors, it contained novel approaches with respect to themicroscopic mechanism. With very few fit variables, the present model was found torepresent well sensor functionality of p-type conducting SrTi0.8Fe0.2O3-δ films. In additionto the temperature dependency of the sensor response, the effect of the specific surface areaon the sensor response was predicted. |
| first_indexed | 2024-12-10T06:58:59Z |
| format | Article |
| id | doaj.art-985a99e52a2a41519f3145956a744e6e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-12-10T06:58:59Z |
| publishDate | 2007-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-985a99e52a2a41519f3145956a744e6e2022-12-22T01:58:22ZengMDPI AGSensors1424-82202007-09-01791871188610.3390/s7091871Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas SensingRalf MoosPerena GoumaKathy SahnerIn the present contribution, three methods for the preparation of nanoscaledSrTi1-xFexO3-δ sensor films for hydrocarbon sensing were investigated. Besides screen-printed thick films based on sol-precipitated nanopowders, two novel synthesis methods,electrospinning and electrospraying, were tested successfully. All of these sensor devicesshowed improved sensor functionality in comparison to conventional microscaled thickfilms. In order to explain the impact of the enhanced surface-to-volume ratio on sensorproperties in a quantitative way, a mechanistic model was applied to micro- and nanoscaleddevices. In contrast to the conventional diffusion-reaction model that has been proposed forn-type semiconducting sensors, it contained novel approaches with respect to themicroscopic mechanism. With very few fit variables, the present model was found torepresent well sensor functionality of p-type conducting SrTi0.8Fe0.2O3-δ films. In additionto the temperature dependency of the sensor response, the effect of the specific surface areaon the sensor response was predicted.http://www.mdpi.com/1424-8220/7/9/1871/electrospinningelectrosprayingsol-precipitationp-type semiconductor |
| spellingShingle | Ralf Moos Perena Gouma Kathy Sahner Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing Sensors electrospinning electrospraying sol-precipitation p-type semiconductor |
| title | Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing |
| title_full | Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing |
| title_fullStr | Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing |
| title_full_unstemmed | Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing |
| title_short | Electrodeposited and Sol-gel Precipitated p-type SrTi1-xFexO3-δ Semiconductors for Gas Sensing |
| title_sort | electrodeposited and sol gel precipitated p type srti1 xfexo3 aza´ semiconductors for gas sensing |
| topic | electrospinning electrospraying sol-precipitation p-type semiconductor |
| url | http://www.mdpi.com/1424-8220/7/9/1871/ |
| work_keys_str_mv | AT ralfmoos electrodepositedandsolgelprecipitatedptypesrti1xfexo3azasemiconductorsforgassensing AT perenagouma electrodepositedandsolgelprecipitatedptypesrti1xfexo3azasemiconductorsforgassensing AT kathysahner electrodepositedandsolgelprecipitatedptypesrti1xfexo3azasemiconductorsforgassensing |