Manipulating polymer composition to create low-cost, high-fidelity sensors for indoor CO2 monitoring
| Autor: | Kelly Brayton, Xikang Zhao, John N. Hodul, George T.-C. Chiu, Wenchao Zhao, Carsten Flores-Hansen, Nikhil Bajaj, James E. Braun, Zachary A. Siefker, Bryan W. Boudouris, Jeffrey F. Rhoads |
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| Rok vydání: | 2021 |
| Předmět: |
Analyte
Multidisciplinary Nanostructure Materials science Ethylene oxide Polymer composition Science Humidity Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound High fidelity chemistry Medicine Polymer blend 0210 nano-technology Layer (electronics) |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-021-92181-4 |
| Popis: | Carbon dioxide (CO2) has been linked to many deleterious health effects, and it has also been used as a proxy for building occupancy measurements. These applications have created a need for low-cost and low-power CO2 sensors that can be seamlessly incorporated into existing buildings. We report a resonant mass sensor coated with a solution-processable polymer blend of poly(ethylene oxide) (PEO) and poly(ethyleneimine) (PEI) for the detection of CO2 across multiple use conditions. Controlling the polymer blend composition and nanostructure enabled better transport of the analyte gas into the sensing layer, which allowed for significantly enhanced CO2 sensing relative to the state of the art. Moreover, the hydrophilic nature of PEO resulted in water uptake, which provided for higher sensing sensitivity at elevated humidity conditions. Therefore, this key integration of materials and resonant sensor platform could be a potential solution in the future for CO2 monitoring in smart infrastructure. |
| Databáze: | OpenAIRE |
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