Next Article in Journal
Impact of Visual Biofeedback of Trunk Sway Smoothness on Motor Learning during Unipedal Stance
Previous Article in Journal
Discerning Localized Thermal Heating from Mechanical Strain Using an Embedded Distributed Optical Fiber Sensor Network
Article

Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling

1
Department of Applied Physics, National Technical University of Athens, 15780 Athens, Greece
2
Centre for Electronics Frontiers Zepler, Institute for Photonics and Nanoelectronics, University of Southampton Highfield Campus, University Road, Building 53 (Mountbatten), Southampton SO17 1BJ, UK
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(9), 2584; https://doi.org/10.3390/s20092584
Received: 21 March 2020 / Revised: 25 April 2020 / Accepted: 29 April 2020 / Published: 1 May 2020
(This article belongs to the Section Physical Sensors)
In this work, the working performance of Platinum (Pt), solvent-free nanoparticle (NP)-based strain sensors made on a flexible substrate has been studied. First, a new model has been developed in order to explain sensor behaviour under strain in a more effective manner than what has been previously reported. The proposed model also highlights the difference between sensors based on solvent-free and solvent-based NPs. As a second step, the ability of atomic layer deposition (ALD) developed Al2O3 (alumina) thin films to act as protective coatings against humidity while in adverse conditions (i.e., variations in relative humidity and repeated mechanical stress) has been evaluated. Two different alumina thicknesses (5 and 11 nm) have been tested and their effect on protection against humidity is studied by monitoring sensor resistance. Even in the case of adverse working conditions and for increased mechanical strain (up to 1.2%), it is found that an alumina layer of 11 nm provides sufficient sensor protection, while the proposed model remains valid. This certifies the appropriateness of the proposed strain-sensing technology for demanding applications, such as e-skin and pressure or flow sensing, as well as the possibility of developing a comprehensive computational tool for NP-based devices. View Full-Text
Keywords: flexible sensors; nanoparticle sensors; tunneling model; endurance; atomic layer deposition; strain sensors; naked; solvent-free flexible sensors; nanoparticle sensors; tunneling model; endurance; atomic layer deposition; strain sensors; naked; solvent-free
Show Figures

Figure 1

MDPI and ACS Style

Aslanidis, E.; Skotadis, E.; Moutoulas, E.; Tsoukalas, D. Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling. Sensors 2020, 20, 2584. https://doi.org/10.3390/s20092584

AMA Style

Aslanidis E, Skotadis E, Moutoulas E, Tsoukalas D. Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling. Sensors. 2020; 20(9):2584. https://doi.org/10.3390/s20092584

Chicago/Turabian Style

Aslanidis, Evangelos, Evangelos Skotadis, Evangelos Moutoulas, and Dimitris Tsoukalas. 2020. "Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling" Sensors 20, no. 9: 2584. https://doi.org/10.3390/s20092584

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop