Seamless Monolithic Design for Foam Based, Flexible, Parallel Plate Capacitive Sensors

Date

2021-04-01

Author

Çiçek, Melih Ögeday
Doğanay, Doğa
Durukan, Mete Batuhan
Ünalan, Hüsnü Emrah

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

168
views

0
downloads

Capacitive pressure sensors received significant attention in line with advancements in wearable electronics. However, in the era of the wearable electronics, fabricated sensors fail to fulfill the absolute requirements. Significant portion of the previously reported capacitive pressure sensors suffer from excessive weight, lack of air permeability, and washing stability due to the use of separate electrode layers. A low-cost, lightweight, parallel plate capacitive sensor with a unique seamless monolithic design that allows sensors to circumvent aforementioned problems is hereby demonstrated. The seamless monolithic capacitive sensor (MCS) with a density of as low as 10.78 mg cm(-3) is fabricated using 3D masking technique on a commercially available melamine foam with silver nanowire electrodes and a protective thin layer of polydimethylsiloxane coating. In addition to its unique design, the MCSs show high sensitivity (up to 1.285 kPa(-1)), fast response/recovery time (18 ms/53 ms), very low-pressure sensing ability (0.5 Pa) with ultra-high mechanical (42 000 cycles), and washing stabilities (10 cycles) along with high air permeability. Moreover, finite element analysis simulations are conducted to reveal the deformation mechanism differences between the monolithic and classical design. Finally, in order to demonstrate their true potential, fabricated MCSs are utilized in real-time body motion monitoring, word and proximity detection.

URI

https://hdl.handle.net/11511/90356

Journal

ADVANCED MATERIALS TECHNOLOGIES

DOI

https://doi.org/10.1002/admt.202001168

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Sensitivity improvement strategies and applications for flexible and wearable capacitive pressure sensors Çiçek, Melih Ögeday; Ünalan, Hüsnü Emrah; Çınar, Simge; Department of Metallurgical and Materials Engineering (2022-8) Pressure sensors have attracted great interest in parallel with developments in wearable electronics, robotics, human-machine interface devices, and electronic skin. In this field, capacitive pressure sensors are gaining increasing research attention due to their high sensitivity, high stability, fast response/recovery times, and simple manufacturing routes. While capacitive pressure sensors have prominent features, there is still a long way to go before they become more common in wearable technology. Incre...
Fabric based wearable triboelectric nanogenerators for human machine interface Doğanay, Doğa; Çiçek, Melih Ögeday; Durukan, Mete Batuhan; Ünalan, Hüsnü Emrah (2021-11-01) Electronic textiles received significant attention with the advancements in materials for wearable electronics. Lack of washing stability and the need for an external power source for wearable electronics are the two major problems that needs to be addressed urgently. Significant portion of the reported solutions fail to propose simple and scalable production steps. In this study, a low cost and scalable design was proposed as a combined solution for aforementioned problems. Thermoplastic polyurethane (TPU)...
13.56 mhz multi-mode rectifier circuit for wirelessly powered implantable medical devices Engür, Yasemin; Külah, Haluk; Department of Electrical and Electronics Engineering (2020-10-9) Implantable devices are becoming popular with the improvements of nanotechnology. The implants require huge amount of power for operation within limited volume. This power requirement can be satisfied by implantable batteries. However, the limited energy of batteries restricts their lifetime, so they need to be recharged for long lasting operation. The charging operation can be done wirelessly with RF coils. These coils offer certain advantages over other...
Single Supply PWM Fully Implantable Cochlear Implant Interface Circuit with Active Charge Balancing Yigit, H. Andac; Ulusan, Hasan; Koc, Mert; Yüksel, Muhammed Berat; Chamanian, Salar; Külah, Haluk (2021-01-01) Low powered fully implantable cochlear implants (FICIs) untangle the aesthetic concerns and battery replacement problems of conventional cochlear implants. However, the reported FICIs lack proper charge balancing and require multiple external supplies to operate. In this work, a complete low power FICI interface circuit is designed that operates with a single supply and uses short-pulse-injection method for charge balancing. The system takes input from multi-channel piezoelectric transducers and stimulates ...
Novel Wearable Radio-Frequency Antennas Based on Woven Conductive Fabrics Dolapci, Turker; Baloglu, M. Sezgin; Mutlu, Feza; Ergül, Özgür Salih (2018-11-02) In this study, a new practical method for fast fabrication of low-cost wearable antennas is introduced. The antennas are directly cut from woven conductive fabrics, while their terminals are connected to microchips by using a repair glue. Following simple trials to demonstrate the fabrication procedure, high-performance radio-frequency antennas that are suitable for the proposed method are designed in a simulation environment based on the multilevel fast multipole algorithm and genetic algorithms. Simulatio...

Citation Formats

M. Ö. Çiçek, D. Doğanay, M. B. Durukan, and H. E. Ünalan, “Seamless Monolithic Design for Foam Based, Flexible, Parallel Plate Capacitive Sensors,” ADVANCED MATERIALS TECHNOLOGIES, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90356.