Indicator Supraparticles for Smart Gasochromic Sensor Surfaces Reacting Ultrafast and Highly Sensitive

Please always quote using this URN: urn:nbn:de:bvb:20-opus-213671
  • The detection of toxic gases, such as NH\(_{3}\) and CO, in the environment is of high interest in chemical, electronic, and automotive industry as even small amounts can display a health risk for workers. Sensors for the real‐time monitoring of these gases should be simple, robust, reversible, highly sensitive, inexpensive and show a fast response. The indicator supraparticles presented herein can fulfill all of these requirements. They consist of silica nanoparticles, which are assembled to supraparticles upon spray‐drying. Sensing moleculesThe detection of toxic gases, such as NH\(_{3}\) and CO, in the environment is of high interest in chemical, electronic, and automotive industry as even small amounts can display a health risk for workers. Sensors for the real‐time monitoring of these gases should be simple, robust, reversible, highly sensitive, inexpensive and show a fast response. The indicator supraparticles presented herein can fulfill all of these requirements. They consist of silica nanoparticles, which are assembled to supraparticles upon spray‐drying. Sensing molecules such as Reichardt's dye and a binuclear rhodium complex are loaded onto the microparticles to target NH\(_{3}\) and CO detection, respectively. The spray‐drying technique affords high flexibility in primary nanoparticle size selection and thus, easy adjustment of the porosity and specific surface area of the obtained micrometer‐sized supraparticles. This ultimately enables the fine‐tuning of the sensor sensitivity and response. For the application of the indicator supraparticles in a gas detection device, they can be immobilized on a coating. Due to their microscale size, they are large enough to poke out of thin coating layers, thus guaranteeing their gas accessibility, while being small enough to be applicable to flexible substrates.show moreshow less

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Metadaten
Author: Susanne Wintzheimer, Maximilian Oppmann, Martin Dold, Carolin Pannek, Marie‐Luise Bauersfeld, Michael Henfling, Sabine Trupp, Benedikt Schug, Karl Mandel
URN:urn:nbn:de:bvb:20-opus-213671
Document Type:Journal article
Faculties:Fakultät für Chemie und Pharmazie / Lehrstuhl für Chemische Technologie der Materialsynthese
Language:English
Parent Title (English):Particle & Particle Systems Characterization
Year of Completion:2019
Volume:36
Issue:10
Article Number:1900254
Source:Particle & Particle Systems Characterization 2019, 36(10):1900254. DOI: 10.1002/ppsc.201900254
DOI:https://doi.org/10.1002/ppsc.201900254
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Tag:CO sensing; NH\(_{3}\); sensor supports; silica supraparticles; smart surfaces
Release Date:2021/03/30
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International