Flexible strain sensors based on gold nanowire dominoes for human motion detection

Liu, Xin; Wei, Lansheng; Wang, Xiaoying; He, Sida; Yan, Yingqiang; Li, Quantong; Yang, Hui; Hu, Chuan; Ling, Yunzhi

doi:10.1016/j.mtcomm.2023.105703

Cited by 6 publications

(3 citation statements)

References 43 publications

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“…This integration establishes a robust platform for accurate biomechanical sensing and revolutionizing fields such as wearable health monitoring and sports analysis. The HX711's advantages include signal amplification, enhanced sensitivity, noise filtering, and improved measurement precision, making it a valuable tool for biomechanical sensing applications [41,42] The performance of the sensor was assessed through a series of tests, starting with simple biomechanical movements where it was attached to the index finger (refer to figure 1(e)). Subsequently, the sensor was positioned at various locations on the human body figure 8, and the bending angles were periodically varied from 10 • and 60 • .…”

Section: Wearable Sensing Setupmentioning

confidence: 99%

Lithographically patternable SU-8/Graphene nanocomposite based strain sensors for soft-MEMS applications

Beigh,

Mallick

2024

J. Micromech. Microeng.

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This paper presents an optimized, lithographically patternable SU-8/Graphene nanocomposite based piezoresistive strain sensor for localized, high-precision assessment, which marks a significant advancement in the field of soft-MEMS based technologies. The fabrication process involves the photolithography of a SU-8/Graphene nanocomposite with a minimum resolution of 50µm, resulting in a material with excellent electrical conductivity and mechanical properties. Specifically, a 3% SU-8/Graphene composition was chosen to exceed the percolation threshold, enabling substantial changes in the resistance %ΔR/R and facilitating photopatternability. The sensor exhibited exceptional performance characteristics, including a rapid response time of 0.1 seconds and a wide bending range from 0o to 60o. Notably, it demonstrated a remarkable %ΔR/R of 19.21, indicating its superior sensing capability. Such high sensitivity is crucial for applications that require precise, localized measurements, such as biomedical engineering, sports science, and smart healthcare.

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Section: Wearable Sensing Setupmentioning

confidence: 99%

Lithographically patternable SU-8/Graphene nanocomposite based strain sensors for soft-MEMS applications

Beigh,

Mallick

2024

J. Micromech. Microeng.

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“…Flexible strain sensors are electronic devices widely used in human-wearable technology and human–machine interaction, playing a crucial role in engineering applications. − These sensors have garnered attention for their broad working range, high sensitivity, excellent durability, and stability, finding extensive applications in human motion detection, disease diagnosis, electronic skin, soft robotics, and more. − Traditional strain sensors are typically suitable only for smaller working ranges, struggling with large strains and complex deformation environments. , In contrast, flexible strain sensors, unrestricted by the rigidity and brittleness of metals, not only adapt to various strain conditions but also exhibit outstanding mechanical compliance and flexibility, making them suitable for complex, wide-ranging working environments. , To achieve high sensitivity or a broad strain range, researchers have explored various elastic materials such as thermoplastic polyurethane, − hydrogels, PDMS, polyvinyl alcohol, etc. They have employed methods to fabricate flexible strain sensors by combining these materials with conductive fillers, with choices ranging from conductive particles like carbon black, one-dimensional metal nanowires, and carbon nanotubes (CNTs) to two-dimensional materials such as graphene and MXene, either individually or in combination. , Zhou et al reported a flexible strain sensor using coaxial wet spinning technology to enhance the strain range by encapsulating carbon nanotubes with thermoplastic polyurethane. Although this sensor achieved a working strain range of 100%, its measured gauge factor (GF) was only 425.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 To achieve high sensitivity or a broad strain range, researchers have explored various elastic materials such as thermoplastic polyurethane, 13−15 hydrogels, 16 PDMS, 2 polyvinyl alcohol, 17 etc. They have employed methods to fabricate flexible strain sensors by combining these materials with conductive fillers, with choices ranging from conductive particles like carbon black, 18 one-dimensional metal nano-wires, 19 and carbon nanotubes 20 (CNTs) to two-dimensional materials such as graphene 21 and MXene, 22 either individually or in combination. 15,23 Zhou et al 24 reported a flexible strain sensor using coaxial wet spinning technology to enhance the strain range by encapsulating carbon nanotubes with thermoplastic polyurethane.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Wide Detection Range Thermoplastic Polyurethane/Graphene Nanoplatelets Multifunctional Strain Sensor with a Porous and Crimped Network Structure

Kang,

Ma,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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High-performance flexible strain sensors have tremendous potential applications in wearable devices and health monitoring. However, developing a flexible strain sensor with high sensitivity over a wide strain range remains a significant challenge. In this study, a fibrous membrane with a porous and crimped structure was designed as the substrate material for TPU/GNPs flexible strain sensors. This structural design effectively balances sensitivity with the strain range. The TPU-PEO fibrous membrane prepared using electrospinning with water washing, resulted in a porous fibrous membrane with a TPU framework. Subsequently, the fibrous membrane was subjected to anhydrous ethanol stimulation to obtain a porous and crimped network structure. GNPs were modified on the TPU fibrous membrane through ultrasonic treatment. The produced flexible strain sensor exhibited high sensitivity (GF = 4047.5) within a large strain range (350%) and demonstrated excellent sensing performance, stability, and durability (>10,000 cycles). It not only captured basic movements but also efficiently recognized and measured bending angles, enabling a more sophisticated human−machine interaction experience. This advancement opens up possibilities for future intelligent wearable technology and human−machine interaction, contributing to the evolution of these fields.

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Tailor‐Made Gold Nanomaterials for Applications in Soft Bioelectronics and Optoelectronics

Zhang,

Liu,

et al. 2024

Advanced Materials

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In modern nanoscience and nanotechnology, gold nanomaterials are indispensable building blocks that have demonstrated a plethora of applications in catalysis, biology, bioelectronics, and optoelectronics. Gold nanomaterials possess many appealing material properties, such as facile control over their size/shape and surface functionality, intrinsic chemical inertness yet with high biocompatibility, adjustable localized surface plasmon resonances, tunable conductivity, wide electrochemical window, etc. Such material attributes have been recently utilized for designing and fabricating soft bioelectronics and optoelectronics. This motivates to give a comprehensive overview of this burgeoning field. The discussion of representative tailor‐made gold nanomaterials, including gold nanocrystals, ultrathin gold nanowires, vertically aligned gold nanowires, hard template‐assisted gold nanowires/gold nanotubes, bimetallic/trimetallic gold nanowires, gold nanomeshes, and gold nanosheets, is begun. This is followed by the description of various fabrication methodologies for state‐of‐the‐art applications such as strain sensors, pressure sensors, electrochemical sensors, electrophysiological devices, energy‐storage devices, energy‐harvesting devices, optoelectronics, and others. Finally, the remaining challenges and opportunities are discussed.

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Flexible strain sensors based on gold nanowire dominoes for human motion detection

Cited by 6 publications

References 43 publications

Lithographically patternable SU-8/Graphene nanocomposite based strain sensors for soft-MEMS applications

Lithographically patternable SU-8/Graphene nanocomposite based strain sensors for soft-MEMS applications

Highly Sensitive and Wide Detection Range Thermoplastic Polyurethane/Graphene Nanoplatelets Multifunctional Strain Sensor with a Porous and Crimped Network Structure

Tailor‐Made Gold Nanomaterials for Applications in Soft Bioelectronics and Optoelectronics

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