Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties
Chemiresistive composites of gold (Au) nanoparticles interlinked with different types of organic molecules were prepared automatically by layer-by-layer self-assembly using a microfluidic cell. For the assembly process, dodecylamine-stabilized Au nanoparticles with an average size of 3.7 nm as well...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-08-01
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| Series: | Frontiers in Sensors |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fsens.2022.907443/full |
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| author | Tina Tauchnitz Yelyena Daskal Rosemarie Dittrich Michael Günthel Florian Mertens Yvonne Joseph |
| author_facet | Tina Tauchnitz Yelyena Daskal Rosemarie Dittrich Michael Günthel Florian Mertens Yvonne Joseph |
| author_sort | Tina Tauchnitz |
| collection | DOAJ |
| description | Chemiresistive composites of gold (Au) nanoparticles interlinked with different types of organic molecules were prepared automatically by layer-by-layer self-assembly using a microfluidic cell. For the assembly process, dodecylamine-stabilized Au nanoparticles with an average size of 3.7 nm as well as alkyl dithiols, alkyl diamines, and alkyl bisdithiocarbamates with different alkyl chain length (C6 and C8) were used. X-ray photoelectron spectroscopy was applied on prepared nanoparticle composites to study the film composition and the degree of interlinkage. For the measurement of electrical and vapor-sensing properties, silicon dies equipped with gold interdigitated electrodes were used. All films show linear current-voltage characteristics and conductivities in the range of 10–2 and 10–4 Ω−1 cm−1 at room temperature. The sensitivity of the film is investigated by dosing them with vapors of toluene, 1-propanol, 4-methyl-2-pentanone, and water in the concentration range from 100 to 5,000 ppm at 0% relative humidity. All composite films respond with an increase in their electrical resistance to the analytes. The sensors show a high signal-to-noise ratio which indicates a detection limit below 100 ppm for all test vapors. The response dynamics demonstrate a high reversibility and a fast sensing mechanism especially for dithiols and diamines with response and recovery times from 2 to 10 s. The dithiol sensors exhibit a high selectivity to toluene and 4-methyl-2-pentanone whereas the bisdithiocarbamate composites are suitable for the detection of water and 1-propanol. All materials are stable for (at least) several months. |
| first_indexed | 2024-04-14T02:50:04Z |
| format | Article |
| id | doaj.art-601062dca40d4f4da10dabf917fd876f |
| institution | Directory Open Access Journal |
| issn | 2673-5067 |
| language | English |
| last_indexed | 2024-04-14T02:50:04Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Sensors |
| spelling | doaj.art-601062dca40d4f4da10dabf917fd876f2022-12-22T02:16:18ZengFrontiers Media S.A.Frontiers in Sensors2673-50672022-08-01310.3389/fsens.2022.907443907443Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive PropertiesTina Tauchnitz0Yelyena Daskal1Rosemarie Dittrich2Michael Günthel3Florian Mertens4Yvonne Joseph5Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Freiberg, GermanyInstitute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Freiberg, GermanyInstitute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Freiberg, GermanyInstitute of Physical Chemistry, TU Bergakademie Freiberg, Freiberg, GermanyInstitute of Physical Chemistry, TU Bergakademie Freiberg, Freiberg, GermanyInstitute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Freiberg, GermanyChemiresistive composites of gold (Au) nanoparticles interlinked with different types of organic molecules were prepared automatically by layer-by-layer self-assembly using a microfluidic cell. For the assembly process, dodecylamine-stabilized Au nanoparticles with an average size of 3.7 nm as well as alkyl dithiols, alkyl diamines, and alkyl bisdithiocarbamates with different alkyl chain length (C6 and C8) were used. X-ray photoelectron spectroscopy was applied on prepared nanoparticle composites to study the film composition and the degree of interlinkage. For the measurement of electrical and vapor-sensing properties, silicon dies equipped with gold interdigitated electrodes were used. All films show linear current-voltage characteristics and conductivities in the range of 10–2 and 10–4 Ω−1 cm−1 at room temperature. The sensitivity of the film is investigated by dosing them with vapors of toluene, 1-propanol, 4-methyl-2-pentanone, and water in the concentration range from 100 to 5,000 ppm at 0% relative humidity. All composite films respond with an increase in their electrical resistance to the analytes. The sensors show a high signal-to-noise ratio which indicates a detection limit below 100 ppm for all test vapors. The response dynamics demonstrate a high reversibility and a fast sensing mechanism especially for dithiols and diamines with response and recovery times from 2 to 10 s. The dithiol sensors exhibit a high selectivity to toluene and 4-methyl-2-pentanone whereas the bisdithiocarbamate composites are suitable for the detection of water and 1-propanol. All materials are stable for (at least) several months.https://www.frontiersin.org/articles/10.3389/fsens.2022.907443/fullchemiresistorsgoldnanoparticlecompositesXPSdithiocarbamate |
| spellingShingle | Tina Tauchnitz Yelyena Daskal Rosemarie Dittrich Michael Günthel Florian Mertens Yvonne Joseph Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties Frontiers in Sensors chemiresistors gold nanoparticle composites XPS dithiocarbamate |
| title | Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties |
| title_full | Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties |
| title_fullStr | Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties |
| title_full_unstemmed | Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties |
| title_short | Bisdithiocarbamate and Diamine Interlinked Gold Nanoparticle Networks: Characterization of Chemical Composition and Chemiresistive Properties |
| title_sort | bisdithiocarbamate and diamine interlinked gold nanoparticle networks characterization of chemical composition and chemiresistive properties |
| topic | chemiresistors gold nanoparticle composites XPS dithiocarbamate |
| url | https://www.frontiersin.org/articles/10.3389/fsens.2022.907443/full |
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