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Inkjet-Printed Bio-Based Melanin Composite Humidity Sensor for Sustainable Electronics.
Krebsbach, Peter; Rincón-Iglesias, Mikel; Pietsch, Manuel; Henel, Carmen; Lanceros-Mendez, Senentxu; Phua, Jun Wei; Ambrico, Marianna; Hernandez-Sosa, Gerardo.
Afiliación
  • Krebsbach P; Light Technology Institute, Karlsruhe Institute of Technology, Engesserstr. 13, 76131 Karlsruhe, Germany.
  • Rincón-Iglesias M; InnovationLab, Speyerer Straße 4, 69115 Heidelberg, Germany.
  • Pietsch M; Light Technology Institute, Karlsruhe Institute of Technology, Engesserstr. 13, 76131 Karlsruhe, Germany.
  • Henel C; InnovationLab, Speyerer Straße 4, 69115 Heidelberg, Germany.
  • Lanceros-Mendez S; BCMaterials, Basque Center for Materials, Bldg. Martina Casiano, UPV/EHU Science Park Barrio Sarriena s/n, 48940 Leioa, Spain.
  • Phua JW; Light Technology Institute, Karlsruhe Institute of Technology, Engesserstr. 13, 76131 Karlsruhe, Germany.
  • Ambrico M; InnovationLab, Speyerer Straße 4, 69115 Heidelberg, Germany.
  • Hernandez-Sosa G; Light Technology Institute, Karlsruhe Institute of Technology, Engesserstr. 13, 76131 Karlsruhe, Germany.
ACS Appl Mater Interfaces ; 16(32): 42555-42565, 2024 Aug 14.
Article en En | MEDLINE | ID: mdl-39086207
ABSTRACT
A lack of sustainability in the design of electronic components contributes to the current challenges of electronic waste and material sourcing. Common materials for electronics are prone to environmental, economic, and ethical problems in their sourcing, and at the end of their life often contribute to toxic and nonrecyclable waste. This study investigates the inkjet printing of flexible humidity sensors and includes biosourced and biodegradable materials to improve the sustainability of the process. Humidity sensors are useful tools for monitoring atmospheric conditions in various fields. Here, an aqueous dispersion of black soldier fly melanin was optimized for printing with a cosolvent and deposited onto interdigitated silver electrodes on flexible substrates. Impedance spectroscopy demonstrated that adding choline chloride increased the ion concentration and AC conductivity by more than 3 orders of magnitude, resulting in a significant improvement in sensing performance and reduced hysteresis. The devices exhibit fast detection (0.8 ± 0.5 s) and recovery times (0.8 ± 0.3 s), with a 170 ± 40-fold decrease in impedance for relative humidity changes from 30% to 90%. This factor is lowered upon prolonged exposure to high humidity in tests over 72 h during which a stable operation is reached. The low embodied energy of the sensor, achieved through material-efficient deposition and the use of waste management byproducts, enhances its sustainability. In addition, approaches for reusability and degradability are presented, rendering the sensor suitable for wearable or agricultural applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Alemania

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: Alemania
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