Laser-Assisted Printed Flexible Sensors: A Review

Han, Tao; Nag, Anindya; Afsarimanesh, Nasrin; Mukhopadhyay, Subhas Chandra; Kundu, Sudip; Xu, Yongzhao

doi:10.3390/s19061462

Cited by 64 publications

(30 citation statements)

References 111 publications

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“…In contrast to the metal‐based strain sensor working on strain‐induced geometry change, nanomaterial‐based strain sensors respond to applied deformation by contact and tunneling resistance changes among individual nanomaterials, thus leading to much enhanced sensitivity, strain detection range, and response speed. Up to now, a collection of fabrication techniques are put forward to develop the flexible strain sensors, including photolithography, [ 13,14 ] laser direct writing, [ 15–19 ] stencil printing, [ 20 ] screen printing, [ 21 ] inkjet printing, [ 22 ] and 3D printing. [ 3,23–27 ] Among these fabrication techniques, 3D printing or additive manufacturing is brought into focus for its simple process, less labor, capability to fabricate customized complex 3D patterns and structures in maskless manners.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of Flexible Strain Sensor Array Based on UV‐Curable Multiwalled Carbon Nanotube/Elastomer Composite

Xiao

Cheng

Yin

et al. 2020

Adv Materials Technologies

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Internet of things (IoT) is expected to significantly improve every aspect of society, especially in soft robotics, structural health monitoring, and human motion detection. Flexible strain sensors with high‐performance characteristics as well as highly efficient and cost‐effective maskless fabrication methods are the key components of IoT for these applications. Herein, a 3D printing technology using digital light processing is developed to fabricate high‐performance flexible strain sensors based on UV‐curable multiwalled carbon nanotubes/elastomer (MWCNT/EA) composite. The MWCNT/EA‐based device with 2 wt% MWCNTs delivers a sensitivity of 8.939 with a linearity up to 45% strain. Additionally, the sensor has a detectable strain range from 0.01% to 60%, a high mechanical durability (10 000 cycles), and linear responses to humidity and temperature. Numerical simulation and impedance study indicate that the sensor works on the deformation‐induced reduction of MWCNT conductive pathway. The developed device can be used to detect various external deformation, when combined with a near‐field communication circuit. Moreover, a 4 × 4 strain sensor array is developed for sensing external stimuli distribution, further demonstrating the high performance of the 3D printed device.

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Section: Introductionmentioning

confidence: 99%

3D Printing of Flexible Strain Sensor Array Based on UV‐Curable Multiwalled Carbon Nanotube/Elastomer Composite

Xiao

Cheng

Yin

et al. 2020

Adv Materials Technologies

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“…Flexible sensors have been made from different kinds of polymers and nanomaterials based on their electrical, mechanical, and thermal characteristics [ 7 , 8 ]. The wearable nature of the flexible sensors [ 9 , 10 ] has also increased their value due to their ubiquitous sensing capabilities.…”

Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotubes-Based Sensors for Strain Sensing Applications

Nag

Alahi

Mukhopadhyay

et al. 2021

Sensors

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The use of multi-walled carbon nanotube (MWCNT)-based sensors for strain–strain applications is showcased in this paper. Extensive use of MWCNTs has been done for the fabrication and implementation of flexible sensors due to their enhanced electrical, mechanical, and thermal properties. These nanotubes have been deployed both in pure and composite forms for obtaining highly efficient sensors in terms of sensitivity, robustness, and longevity. Among the wide range of applications that MWCNTs have been exploited for, strain-sensing has been one of the most popular ones due to the high mechanical flexibility of these carbon allotropes. The MWCNT-based sensors have been able to deduce a broad spectrum of macro- and micro-scaled tensions through structural changes. This paper highlights some of the well-approved conjugations of MWCNTs with different kinds of polymers and other conductive nanomaterials to form the electrodes of the strain sensors. It also underlines some of the measures that can be taken in the future to improve the quality of these MWCNT-based sensors for strain-related applications.

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“…Laser structuring has already been used to manufacture single-layer sensors, actuators and circuit carriers [ 13 , 14 ]. However, this former published work usually involved additional steps [ 14 ] such as etching, bonding and transferring.…”

Section: Introductionmentioning

confidence: 99%

Electroplating and Ablative Laser Structuring of Elastomer Composites for Stretchable Multi-Layer and Multi-Material Electronic and Sensor Systems

Stier

Böse

2021

Micromachines

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In this work we present the concept of electroplated conductive elastomers and ablative multi-layer and multi-material laser-assisted manufacturing to enable a largely automated, computer-aided manufacturing process of stretchable electronics and sensors. Therefore, the layers (conductive and non-conductive elastomers as well as metal layers for contacting) are first coated over the entire surface (doctor blade coating and electroplating) and then selectively removed with a CO2 or a fiber laser. These steps are repeated several times to achieve a multi-layer-structured design. Is it not only possible to adjust and improve the work previously carried out manually, but also completely new concepts such as fine through-plating between the layers to enable much more compact structures become possible. In addition, metallized areas allow the direct soldering of electronic components and thus a direct connection between conventional and stretchable electronics. As an exemplary application, we have used the process for manufacturing a thin and surface solderable pressure sensor with a silicone foam dielectric and a stretchable circuit board.

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Laser-Assisted Printed Flexible Sensors: A Review

Cited by 64 publications

References 111 publications

3D Printing of Flexible Strain Sensor Array Based on UV‐Curable Multiwalled Carbon Nanotube/Elastomer Composite

3D Printing of Flexible Strain Sensor Array Based on UV‐Curable Multiwalled Carbon Nanotube/Elastomer Composite

Multi-Walled Carbon Nanotubes-Based Sensors for Strain Sensing Applications

Electroplating and Ablative Laser Structuring of Elastomer Composites for Stretchable Multi-Layer and Multi-Material Electronic and Sensor Systems

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