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Chouchene O, Mouna S, Bouhamed A, Damak M, Frikha F, Marzouk S, Ben Mahfoudh K, Mhiri C, Bahloul Z. Manifestations et aspects radiologiques au cours de neuro-behçet. Rev Med Interne 2022. [DOI: 10.1016/j.revmed.2022.10.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bouhamed A, Rajendran D, Frenzel P, Zubkova T, Al-Hamry A, Miesel D, Kamatchi V, Ramalingame R, Bautista-Quijano JR, Lang H, Baumann RR, Kanoun O. Customizing hydrothermal properties of inkjet printed sensitive films by functionalization of carbon nanotubes. Nanotechnology 2021; 32:105708. [PMID: 33217748 DOI: 10.1088/1361-6528/abcc95] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Multiwalled carbon nanotubes (MWCNTs) are attractive materials for realizing sensors, owing to their high aspect ratio associated with excellent mechanical, electronic, and thermal properties. Moreover, their sensing properties can be tuned by introducing functional groups on their framework and adjusting the processing conditions. In this paper, we investigate the potential of functionalized CNTs for humidity and temperature sensing by optimization of the functionalization, the processing conditions and the printing conditions. The morphology of the differently functionalized MWCNTs is investigated by infrared spectroscopy (IR), scanning electron microscopy, thermogravimetry (TG) and TG-coupled mass-spectrometric studies. Using the functionalized MWCNTs, films were fabricated with different numbers of layers (4, 6, 8, 10 layers) via inkjet printing on a flexible polyimide substrate containing an interdigital microelectrode. The influence of hydrothermal effects was investigated. The sensitivity to humidity is higher for films prepared with MWCNTs functionalized with a high sonication amplitude and a bigger number of layers due to enhancements of hydrophilicity and water mobility. A higher sensitivity to temperature is achieved by a low sonication amplitude and a small number of layers. For the encapsulation of the temperature sensor against humidity, a Bectron layer is proposed, which reduces also the hysteresis effect. This study demonstrates the efficiency of carboxylic functionalized MWCNTs deposit by inkjet printing for realization of sensitive and cost-effective humidity and temperature sensors. It provides a real example for the interesting contribution of functionalization procedures to the sensing properties of MWCNTs films.
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Affiliation(s)
- A Bouhamed
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - D Rajendran
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - P Frenzel
- Technische Universität Chemnitz, Inorganic Chemistry, Chemnitz, Germany
| | - T Zubkova
- Technische Universität Chemnitz, Print and Media Technology, Chemnitz, Germany
| | - A Al-Hamry
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - D Miesel
- Technische Universität Chemnitz, Inorganic Chemistry, Chemnitz, Germany
| | - V Kamatchi
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - R Ramalingame
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - J R Bautista-Quijano
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
| | - H Lang
- Technische Universität Chemnitz, Inorganic Chemistry, Chemnitz, Germany
| | - R R Baumann
- Technische Universität Chemnitz, Print and Media Technology, Chemnitz, Germany
| | - O Kanoun
- Technische Universität Chemnitz, Chair of Measurement and Sensor Technology, Chemnitz, Germany
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