Preparation of Bimodal Silver Nanoparticle Ink Based on Liquid Phase Reduction Method

Yu, Zhiheng; Zhang, Tiancheng; Li, Kaifeng; Huang, Fengli; Tang, Chengli

doi:10.3390/nano12030560

Cited by 16 publications

(10 citation statements)

References 45 publications

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“…According to previous studies [ 33 , 34 , 35 ], when the change in the distance between the two friction layers was much smaller than the area of the friction layer, the open-circuit voltage and short-circuit current of the TENGs could be calculated as follows:

where C ( x ) was the capacitance between the two electrodes at different time-varying displacements x ; ε 0 was the vacuum dielectric constant; S was the surface area of the friction layer; d 0 was the effective thickness of the dielectric layer; σ was the triboelectric surface charge density; Q SC ( x ) was the amount of short-circuit charge transfer at displacement x ; and f was the frequency. Therefore, according to Equations (1) and (2), we could observe that the open-circuit voltage of TENGs was independent of frequency f and increased only with larger displacement between the two contact surfaces, and the short-circuit current was proportional to the frequency f , so the measured maximum short-circuit current increased with the frequency f , shown in Figure 5 b,c.…”

Section: Resultsmentioning

confidence: 99%

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

Huang

et al. 2022

Materials

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Triboelectric nanogenerators (TENGs) are considered to be the most promising energy supply equipment for wearable devices, due to their excellent portability and good mechanical properties. Nevertheless, low power generation efficiency, high fabrication difficulty, and poor wearability hinder their application in the wearable field. In this work, PA66/graphene fiber films with 0, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% graphene and PVDF films were prepared by electrospinning. Meanwhile, TENGs were prepared with PA66/graphene fiber films, PVDF films and plain weave conductive cloth, which were used as the positive friction layer, negative friction layer and the flexible substrate, respectively. The results demonstrated that TENGs prepared by PA66/graphene fiber films with 2 wt% grapheme showed the best performance, and that the maximum open circuit voltage and short circuit current of TENGs could reach 180 V and 7.8 μA, respectively, and that the power density was 2.67 W/m2 when the external load was 113 MΩ. This is why the PA66/graphene film produced a more subtle secondary network with the addition of graphene, used as a charge capture site to increase its surface charge. Additionally, all the layered structures of TENGs were composed of breathable electrospun films and plain conductive cloth, with water vapor transmittance (WVT) of 9.6 Kgm−2d−1, reflecting excellent wearing comfort. The study showed that TENGs, based on all electrospinning, have great potential in the field of wearable energy supply devices.

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Section: Resultsmentioning

confidence: 99%

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

Huang

et al. 2022

Materials

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“…Since the properties of nanoparticles depend on their size and shape, it is important to prepare them with uniform sizes and shapes. The chemical reduction of metal ions in a liquid phase is one of the most common methods of preparing nanoparticles [9][10][11]. However, the control of the uniformity of sizes and shapes is difficult in this method.…”

Section: Introductionmentioning

confidence: 99%

Dependence of size distribution of nanoparticles on hole size uniformity in membrane emulsification

Yanagishita¹,

Maejima²,

Masuda³

2022

Mater. Res. Express

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Metal oxide nanoparticles were fabricated by membrane emulsification using alumina through-hole membranes with different hole size uniformity. Hole size of alumina through-hole membrane used for membrane emulsification and the size of obtained nanoparticles were evaluated by SEM observation, and the relationship between the uniformity of hole size and the size distribution of the obtained nanoparticles was investigated. As a result, nanoparticles with higher size uniformity were obtained when the RSD (relative standard deviation) of hole size was 3.8%. This indicates that the hole size uniformity of the emulsification membrane is important for the fabrication of droplets and nanoparticles of uniform size by membrane emulsification.

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“…Flexible electronic devices play an increasingly significant role in devices and systems of electronic skin [1][2][3], human-computer interactions [4], and physiological signal monitoring [5]. Flexible pressure sensors are an important part of flexible electronic devices, which can sense a small range of pressure, and convert it into electrical signals [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Three-Dimensional Circular Truncated Cone Microstructures on the Performance of Flexible Pressure Sensors

Jin

et al. 2022

Materials

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Three-dimensional microstructures play a key role in the fabrication of flexible electronic products. However, the development of flexible electronics is limited in further applications due to low positioning accuracy, the complex process, and low production efficiency. In this study, a novel method for fabricating three-dimensional circular truncated cone microstructures via low-frequency ultrasonic resonance printing is proposed. Simultaneously, to simplify the manufacturing process of flexible sensors, the microstructure and printed interdigital electrodes were fabricated into an integrated structure, and a flexible pressure sensor with microstructures was fabricated. Additionally, the effects of flexible pressure sensors with and without microstructures on performance were studied. The results show that the overall performance of the designed sensor with microstructures could be effectively improved by 69%. Moreover, the sensitivity of the flexible pressure sensor with microstructures was 0.042 kPa−1 in the working range of pressure from 2.5 to 10 kPa, and the sensitivity was as low as 0.013 kPa−1 within the pressure range of 10 to 30 kPa. Meanwhile, the sensor showed a fast response time, which was 112 ms. The stability remained good after the 100 cycles of testing. The performance was better than that of the flexible sensor fabricated by the traditional inverted mold method. This lays a foundation for the development of flexible electronic technology in the future.

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Preparation of Bimodal Silver Nanoparticle Ink Based on Liquid Phase Reduction Method

Cited by 16 publications

References 45 publications

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

Electrospun PA66/Graphene Fiber Films and Application on Flexible Triboelectric Nanogenerators

Dependence of size distribution of nanoparticles on hole size uniformity in membrane emulsification

Effects of Three-Dimensional Circular Truncated Cone Microstructures on the Performance of Flexible Pressure Sensors

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