High-sensitivity, fast-response flexible pressure sensor for electronic skin using direct writing printing

Chen, Xiaojun; Lin, Xitong; Mo, Deyun; Xia, Xiaoqun; Gong, Min; Lian, Haishan; Luo, Yunfeng

doi:10.1039/d0ra04431h

Cited by 15 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More detailed descriptions of the direct writing process and parameter analysis of the technology are published in the previous literature. 28 An 8 × 8 array of sensitive units is fabricated on the PDMS substrate using the Weissenberg direct writing technology (Fig. 1b).…”

Section: Resultsmentioning

confidence: 99%

Direct-Write Fabrication of Flexible Array Pressure Sensor for Monitoring Position Distribution

Chen

Lian

et al. 2020

ECS J. Solid State Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Tactile sensors with high flexibility have attracted great interest because of their huge potential in various applications including smart robots, smart prostheses, human-machine interfaces, and biological monitoring electronic devices. However, it remains a critical challenge to develop tactile sensors with both high sensitivity and flexibility. In this work, a flexible 8 × 8 array pressure sensors with GNPs/MWCNT filled conductive composite material on PDMS substrates was proposed using direct-write printing. The printing technology based on the Weissenberg effect had the advantages of rapid supply of fluid and avoiding needle clogging in the printing process, which was suitable for large-area manufacturing of sensor sensitive units. The sensitivity of PDMS-based flexible array pressure sensors in the pressure range of 0–25 kPa and 25–75 kPa reached ∼5.09 MPa−1 and ∼0.0209 kPa−1, respectively. Response/recovery time reached ∼150 ms and ∼200 ms, respectively. When 1000 cycles were performed in the 0–75 kPa pressure range, the PDMS substrate flexible array pressure sensor had high stability and repeatability. These superior properties are indicative of their great potential in applications such as intelligent robotics, artificial palpation, prosthetics, and wearable devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Direct-Write Fabrication of Flexible Array Pressure Sensor for Monitoring Position Distribution

Chen

Lian

et al. 2020

ECS J. Solid State Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, for real‐life applications and reliable data collection, flexible pressure sensors must exhibit superior sensitivity, good resolution, fast response, stability, and robustness. [ 8 ] Flexible pressure sensors made of biodegradable, eco‐friendly, self‐healing materials can assure long‐term usage, which ensures cost‐effective medical diagnostic and beneficial clinical applications.…”

Section: Introductionmentioning

confidence: 99%

Perylene Diimide (PDI) based Flexible Multifunctional Sensor Design for Personal Healthcare Monitoring‐ A Complementary Approach Involving Experimental and Theoretical Investigations

Adepu

Tathacharya

Fernandes

et al. 2023

Adv Materials Technologies

View full text Add to dashboard Cite

This work demonstrates the Perylene Diimide (PDI) based multifunctional sensor for breath‐sensing and Geriatric Emergency Signalling applications fabricated by an economically viable vacuum filtration deposition technique. The deposition of PDI molecules on the flexible substrate forms a moderately conducting percolating molecular network, exhibiting superior pressure and breath‐sensing performance. The pressure sensor displays a sensitivity of 2.42198 kPa−1 with response and recovery times of ≈191 and ≈166 msec. Also, the sensor displays response and recovery times of ≈211 msec and ≈2.651 sec for breath sensing. The durability of the sensor is evaluated using a pressure‐tapping machine, and the sensor displayed a negligible performance drop over ≈10 000 cycles. The experimental findings are complemented by an ab‐initio calculation‐based comprehensive theoretical analysis of the underlying transduction mechanism for pressure and breath sensing in the context of the percolating molecular network. The theoretical analysis reveals that applied pressure and molecular adsorption significantly influence the molecular conductivity as well as the inter‐molecular quantum mechanical tunneling component, which primarily contributes to the observed increase in conductivity with pressure and exposure to breath. An Android/iOS application is developed to wirelessly receive data via Bluetooth from the sensors connected to a microcontroller.

show abstract

“…Common conductive materials for flexible sensors include carbon nanotubes, graphene, and its derivatives, − metal nanomaterial, , and carbon black . Graphene has the characteristics of a high surface area, large specific surface area, and two-dimensional structure, and it more easily forms a dispersed morphology and efficient plane-to-plane conductive channels, so it is often used as an excellent conductive filler in flexible sensors. − …”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

Wang

Zheng

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

In this research, polydimethylsiloxane (PDMS) and graphene nanoplatelets (GNPs) were used as flexible substrates and conductive layers. A facile and template transfer method combined with a low-cost solution-spraying process was adopted to prepare the microdome array GNPs/PDMS flexible strain sensor. The microdome array produces different degrees of in-plane deformation and the gradient distribution of the GNP conductive network on the surface during stretching. This affects the contact effect between the adjacent cells of the GNP conductive network on the film surface in different strain ranges, thereby realizing a sensitive resistance response. The strain sensor of the microdome array GNPs/PDMS exhibits excellent gauge factors (GF) of 8.98 (0.26% < ε < 20%), 18.31 (20% < ε < 43%), and 34.57 (43% < ε < 60%), the highest of which is 8 times higher than that of the planar GNPs/PDMS strain sensor without a microdome array. In addition, the material exhibits remarkable stability and durability (10 000 cycles), fast response time (125 ms), and stable relative frequency/strain sensing performance. Finally, the strain sensors of the microdome array GNPs/PDMS were packaged for various application tests, showing broad application prospects in electronic skin, wearable electronic devices, and component health monitoring.

show abstract

High-sensitivity, fast-response flexible pressure sensor for electronic skin using direct writing printing

Abstract: Bionic electronic skin with human sensory capabilities has attracted extensive research interest, which has been applied in the fields of medical health diagnosis, wearable electronics, human–computer interaction, and bionic prosthetics.

Cited by 15 publications

References 39 publications

Direct-Write Fabrication of Flexible Array Pressure Sensor for Monitoring Position Distribution

Direct-Write Fabrication of Flexible Array Pressure Sensor for Monitoring Position Distribution

Perylene Diimide (PDI) based Flexible Multifunctional Sensor Design for Personal Healthcare Monitoring‐ A Complementary Approach Involving Experimental and Theoretical Investigations

High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

Contact Info

Product

Resources

About