Preparation of Ag NWs and Ag NWs@PDMS stretchable sensors based on rapid polyol method and semi-dry process

Li, Wei; He, Yang; Xu, Jie; Wang, Wenyu; Zhu, Zhengtao

doi:10.1016/j.jallcom.2019.06.257

Cited by 28 publications

(12 citation statements)

References 34 publications

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“…The SEM analysis of the as-synthesized AgNWs shows that the nanowires exhibit parallel aligned noodle-like structures over large areas (Figure 4b,c). Along with the reaction temperature of 160 °C, the AgNO 3 /PVP ratio has also great effect on the morphology of AgNWs [53]. In our case, a 1:1 ratio of AgNO 3 /PVP started the growth of Ag nanoparticles, as can be seen in the SEM image in Figure 4a.…”

Section: Resultssupporting

confidence: 60%

High-yield synthesis of silver nanowires for transparent conducting PET films

Naz¹,

Asghar²,

Ramzan³

et al. 2021

Beilstein J. Nanotechnol.

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Silver nanowires (AgNWs) with ultrahigh purity and high yield were successfully synthesized by employing a modified facile polyol method using PVP as a capping and stabilizing agent. The reaction was carried out at a moderate temperature of 160 °C under mild stirring for about 3 h. The prepared AgNWs exhibited parallel alignment on a large scale and were characterized by UV–vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and PL spectroscopy. The luminescent AgNWs exhibited red emission, which was accredited to deep holes. The SEM results confirmed the formation of AgNWs of 3.3 to 4.7 µm in length with an average diameter of about 86 nm, that is, the aspect ratio values of the AgNWs exceeded 45. An ink consisting of hydroxyethyl cellulose (HEC) and AgNWs was transferred to polyethylene terephthalate (PET) films by simple mechanical pressing. The PET films retained transparency and flexibility after the ink coating. The maximum transmittance value of as-prepared PET films in the visible region was estimated to be about 92.5% with a sheet resistance value of ca. 20 Ω/sq. This makes the films a potential substitute to commonly used expensive indium tin oxide (ITO) in the field of flexible optoelectronics.

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Section: Resultssupporting

confidence: 60%

High-yield synthesis of silver nanowires for transparent conducting PET films

Naz¹,

Asghar²,

Ramzan³

et al. 2021

Beilstein J. Nanotechnol.

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“…At present, to satisfy the aforementioned characteristics, researchers have designed strain sensors with different sensing mechanisms, among which the resistance sensor has gradually become the mainstream design method of strain sensors due to its simplicity and low cost. According to the response principle of resistance sensors, conductive carbon fillers and mental nanowires (such as carbon black [16,17], carbon nanotubes [18,19], graphene [20,21], and Ag nanowires [22,23]) can be combined with flexible substrates (such as polydimethylsiloxane (PDMS) [24,25], polyurethane (PU) [26,27], silicone rubber (SR) [28,29], elastic fabrics [30,31], and elastic bands [32]) to make a flexible piezoresistive sensor with a high sensitivity and a large stretch range by a certain preparation method. Therefore, these studies reveal that composites made of a conductive material and polymer can meet the performance requirement of strain sensors.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Strain Sensor Based on the Porous Structure of a Carbon Black/Carbon Nanotube Conducting Network for Human Motion Detection

Zhang

Chen

et al. 2020

Sensors

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High-performance flexible strain sensors are playing an increasingly important role in wearable electronics, such as human motion detection and health monitoring, with broad application prospects. This study developed a flexible resistance strain sensor with a porous structure composed of carbon black and multi-walled carbon nanotubes. A simple and low-cost spraying method for the surface of a porous polydimethylsiloxane substrate was used to form a layer of synergized conductive networks built by carbon black and multi-walled carbon nanotubes. By combining the advantages of the synergetic effects of mixed carbon black and carbon nanotubes and their porous polydimethylsiloxane structure, the performance of the sensor was improved. The results show that the sensor has a high sensitivity (GF) (up to 61.82), a wide strain range (0%–130%), a good linearity, and a high stability. Based on the excellent performance of the sensor, the flexible strain designed sensor was installed successfully on different joints of the human body, allowing for the monitoring of human movement and human respiratory changes. These results indicate that the sensor has promising potential for applications in human motion monitoring and physiological activity monitoring.

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“…Compared to other categories of fillers, AgNWs are more flexible, transparent, electrically conducting, solution-processable, and compatible with a variety of substrates. Silver nanoparticles and silver nanowires are other potential elements for enhancing the sensitivity of strain sensors [ 58 ]. The length and diameter of the AgNW decide the aspect ratio, which impacts the stability of the strain sensor.…”

Section: Agnws In Polymer Compositesmentioning

confidence: 99%

“…AgNWs were prepared using the modified polyol method in most of the research works reported. An improved polyol method to prepare AgNWs in 30 min is described in the work of Wei Li et al [ 58 ]. The reaction temperature, the molecular weight of polyvinyl pyrrolidone (PVP), the ratio of silver nitrate (AgNO 3 ), and PVP affect the sensing characteristics.…”

Section: Agnw/pdms-based Stretchable Strain Sensorsmentioning

confidence: 99%

Silver Nanowires in Stretchable Resistive Strain Sensors

Raman

Sankar

2022

Nanomaterials

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Silver nanowires (AgNWs), having excellent electrical conductivity, transparency, and flexibility in polymer composites, are reliable options for developing various sensors. As transparent conductive electrodes (TCEs), AgNWs are applied in optoelectronics, organic electronics, energy devices, and flexible electronics. In recent times, research groups across the globe have been concentrating on developing flexible and stretchable strain sensors with a specific focus on material combinations, fabrication methods, and performance characteristics. Such sensors are gaining attention in human motion monitoring, wearable electronics, advanced healthcare, human-machine interfaces, soft robotics, etc. AgNWs, as a conducting network, enhance the sensing characteristics of stretchable strain-sensing polymer composites. This review article presents the recent developments in resistive stretchable strain sensors with AgNWs as a single or additional filler material in substrates such as polydimethylsiloxane (PDMS), thermoplastic polyurethane (TPU), polyurethane (PU), and other substrates. The focus is on the material combinations, fabrication methods, working principles, specific applications, and performance metrics such as sensitivity, stretchability, durability, transparency, hysteresis, linearity, and additional features, including self-healing multifunctional capabilities.

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Preparation of Ag NWs and Ag NWs@PDMS stretchable sensors based on rapid polyol method and semi-dry process

Cited by 28 publications

References 34 publications

High-yield synthesis of silver nanowires for transparent conducting PET films

High-yield synthesis of silver nanowires for transparent conducting PET films

A Flexible Strain Sensor Based on the Porous Structure of a Carbon Black/Carbon Nanotube Conducting Network for Human Motion Detection

Silver Nanowires in Stretchable Resistive Strain Sensors

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