Graphene oxide humidity sensor built entirely by additive manufacturing approaches
| Autor: | Michael A. Pope, Farid Ahmed, Ehsan Toyserkani, Usman Ali, Ehsan Marzbanrad, Amir Azhari, Farzad Liravi |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Fabrication business.industry Graphene Oxide Humidity Atmospheric temperature range Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Optoelectronics Extrusion Relative humidity Electrical and Electronic Engineering business Porosity |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 30:8980-8988 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Graphene is emerging as an excellent material choice for high-performance electrical and electrochemical devices such as humidity sensors. The rapid technological evolution in additive manufacturing (AM) enables freedom to design and process multiple materials for scalable fabrication of sensors. Herein, we introduce a hybrid AM approach to fabricate a graphene-based humidity sensor and study its sensing performance. A powder-bed binder-jetting AM technique is used to build a porous 3D-structure of thermally reduced graphene oxide as the humidity sensing element. In parallel, a material extrusion AM approach is used to make a silicone-based hollow cube as the housing of the graphene structure. The AM fabricated sensor shows high sensitivity when tested in the relative humidity (RH) range of 6.4–97.3% with a rapid response time of 7 s at 45% RH due to the open porous structure formed by the binder-jetting approach. Sensing performance was investigated at low and medium RH in the temperature range of 25–80 °C and the device demonstrated a negligible temperature dependence. The presented graphene-based humidity sensor also shows good repeatability in RH measurements. |
| Databáze: | OpenAIRE |
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