Synthesis of very thin Ag nanowires with fewer particles by suppressing secondary seeding

Jia, Dan; Zhao, Yan; Wei, Wei; Chen, Chao; Lei, Guowei; Wan, Mengjuan; Tao, Jingqi; Li, Shuxin; Ji, Shulin; Ye, Changhui

doi:10.1039/c6ce02075e

Cited by 47 publications

(44 citation statements)

References 30 publications

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“…Although the diameter can be adjusted by the concentration of co-additives, the yield of AgNWs will also be changed. Our result of AgNWs (40 nm diameter, 2100 aspect ratio and 90% yield of AgNWs) is appealing compared with these similar studies in literature [ 4 , 5 , 14 , 15 , 16 , 17 ].…”

Section: Resultssupporting

confidence: 68%

“…So, the yield of NWs using NaBr additive was lower than using NaCl. Moreover, some researchers have used both NaCl and NaBr additives to produce AgNWs with small diameters, some even approaching 20 nm [ 4 , 5 , 15 , 16 , 17 ]. However, many AgNPs were produced in these studies as well.…”

Section: Introductionmentioning

confidence: 99%

“…The large number of AgNPs (low yield of AgNWs) obtained by using NaBr additive is also related to the weak etching ability of Br − /O 2 compared with that of Cl − /O 2 . In order to increase the percentage of NWs, other factors must be considered to precisely control the synthetic process, such as bubbled gas [ 12 ], injection rate of additive and reaction temperatures [ 14 , 16 , 17 , 18 ]. Tuning these complicated conditions to achieve high yield of AgNWs with small lateral size using Cl − or/and Br − mediated methods is still a great challenge.…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Effects of NaCl, NaBr and Their Mixtures on Silver Nanowire Nucleation and Growth in Terms of the Distribution of Electron Traps in Silver Halide Crystals

et al. 2018

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In recent years, many research groups have synthesized ultra-thin silver nanowires (AgNWs) with diameters below 30 nm by employing Cl− and Br− simultaneously in the polyol process. However, the yield of AgNWs in this method was low, due to the production of Ag nanoparticles (AgNPs) as an unwanted byproduct, especially in the case of high Br− concentration. Here, we investigated the roles of Cl− and Br− in the preparation of AgNWs and then synthesized high aspect ratio (up to 2100) AgNWs in high yield (>85% AgNWs) using a Cl− and Br− co-mediated method. We found that multiply-twinned particles (MTPs) with different critical sizes were formed and grew into AgNWs, accompanied by a small and large amount of AgNPs for the NaCl and NaBr additives, respectively. For the first time, we propose that the growth of AgNWs of different diameters and yields can be understood based on the electron trap distribution (ETD) of the silver halide crystals. For the case of Cl− and Br− co-additives, a mixed silver halide crystal of AgBr1−xClx was formed, rather than the AgBr/AgCl mixture reported previously. In this type of crystal, the ETD is uniform, which is beneficial for the synthesis of AgNWs with small diameter (30~40 nm) and high aspect ratio. AgNW transparent electrodes were prepared in air by rod coating. A sheet resistance of 48 Ω/sq and transmittance of 95% at 550 nm were obtained without any post-treatment.

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Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Understanding the Effects of NaCl, NaBr and Their Mixtures on Silver Nanowire Nucleation and Growth in Terms of the Distribution of Electron Traps in Silver Halide Crystals

et al. 2018

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“…Synthesis of AgNWs and Preparation of AgNWs Solution : The AgNWs with an average diameter of ≈21 nm and an average length of ≈34 um (aspect ratio > 1500) were synthesized by a polyol process, according to our previous work . First, 0.0114 g of NaBr, 0.0123 g of NaCl, 0.28 g of poly(vinylpyrrolidone) (average molecular weight of 36 0000), and 0.2255 g of AgNO 3 were, respectively, dissolved in 0.5, 1, 5, and 5 mL of ethylene glycol (EG) to prepare corresponding fresh solutions.…”

Section: Methodsmentioning

confidence: 99%

Coaxial‐Structured Weavable and Wearable Electroluminescent Fibers

Liang

et al. 2017

Adv Elect Materials

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Flexible, lightweight, and wearable devices are currently attracting tremendous interest in the field of advanced electronics. In this work, novel 1D, flexible, coaxial-structured, bright and colorful alternating current electroluminescent (ACEL) fibers consisting of AgNW-based electrodes, a ZnS phosphor layer, and silicone dielectric and encapsulation layers are designed and fabricated through a simple protocol. This facile all-solution-based fabrication protocol enables scalable production of long ACEL fibers (>12 cm). Stemming from the rational design and facile fabrication process, the as-prepared ACEL fibers exhibit uniform, bright, and angularly independent luminance (up to 202 cd m −2 @ 195 V and 2 kHz). Benefiting mainly from the robust AgNWbased electrodes and versatile silicone, the ACEL fibers exhibit additionally excellent flexibility and mechanical stability, being capable to maintain ≈91% of luminance after 500 bending-recovery cycles, as well as mitigated luminance degradation after continuous work in ambient. The proper length combined with superb mechanical properties makes the ACEL fibers readily weavable. Most notably, the isolating, hydrophobic, and biocompatible silicone encapsulation layer endows the ACEL fibers unprecedented wearability. Eventually, a proof-of-concept ACEL fabric is demonstrated by weaving the asprepared long ACEL fibers, to show the future perspective of directly weaving ACEL fibers into densely arrayed wearable functional cloths. Flexible Electronics

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“…Figure 1 schematically illustrates the fabrication process of AgNWs/LLDPE bimorph ETA. First, AgNWs with two different average diameters (150 and 22 nm) were synthesized by a modified polyol reduction route [30,31] and purified via dynamic agitation-induced centrifugal purification. [32] Afterward, a certain amount of hydroxypropyl methyl cellulose (HPMC) was added to the mixed AgNW ink (with a desired ratio of thick and thin AgNWs) to improve the adhesion of AgNWs to substrates.…”

Section: Introductionmentioning

confidence: 99%

Electrothermal Actuators with Ultrafast Response Speed and Large Deformation

Chen

Yang

Wang

et al. 2020

Advanced Intelligent Systems

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The ability to fabricate electrothermal actuators (ETAs) simultaneously featuring ultrafast response speed (within 0.1 s), large deformation (bending for at least 360°), high figure‐of‐merit (FoM, larger than 0.1%), and low driving voltage (smaller than 1 V) in a single device is extremely important and challenging for their applications in artificial muscles, switches, and microsensors for robotics and biomimetic devices. Herein, an ETA composed of a silver nanowire (AgNW) layer and an ultrathin linear low‐density polyethylene (LLDPE) film with all the aforementioned features is designed. Due to the high conductivity of the AgNW layer and the great difference between the coefficients of thermal expansion of AgNW layer and LLDPE film as well as the huge change in the heat transfer coefficient between flat and rolled ETA, the obtained ETA exhibits an ultrafast response speed of 0.08 s for a bending angle of 360° with a FoM of 0.46% at a low driving voltage of 1 V, over one order of magnitude larger than those of reported ETAs. As a proof‐of‐concept application, the as‐prepared ETAs can be used as intelligent mechanical devices with excellent performance.

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Synthesis of very thin Ag nanowires with fewer particles by suppressing secondary seeding

Cited by 47 publications

References 30 publications

Understanding the Effects of NaCl, NaBr and Their Mixtures on Silver Nanowire Nucleation and Growth in Terms of the Distribution of Electron Traps in Silver Halide Crystals

Understanding the Effects of NaCl, NaBr and Their Mixtures on Silver Nanowire Nucleation and Growth in Terms of the Distribution of Electron Traps in Silver Halide Crystals

Coaxial‐Structured Weavable and Wearable Electroluminescent Fibers

Electrothermal Actuators with Ultrafast Response Speed and Large Deformation

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