Sub 30 nm silver nanowire synthesized using KBr as co-nucleant through one-pot polyol method for optoelectronic applications

Zhang, Kaili; Du, Yukou; Shimin, Chen

doi:10.1016/j.orgel.2015.08.008

Cited by 56 publications

(52 citation statements)

References 28 publications

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“…The release rate of Ag + ions is too slow at such a high concentration of Br − ions, resulting in multiple twin seeds that grow into AgNWs being strongly etched by Br − /O2. The formed nanoparticles grow into large irregular particles under collision [35,57]. It has been demonstrated that the diameter of AgNWs can be reduced more effectively by using Br − than Cl − ions, although silver nanoparticles are easily formed.…”

Section: Resultsmentioning

confidence: 99%

“…Mediated agents (including anion or cation mediated agents) play an essential role in the synthesis of AgNWs by regulating the growth and etching speed [31]. Some reports [32][33][34][35][36][37][38][39] showed that anions such as Cl − ions and Br − ions could reduce supersaturation, thus promoting the formation of multiple twins and accelerating the growth of AgNWs. The etching effect of anion mediated agents was also investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

et al. 2020

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The properties and applications of Ag nanowires (AgNWs) are closely related to their morphology and composition. Therefore, controlling the growth process of AgNWs is of great significance for technological applications and fundamental research. Here, silver nanowires (AgNWs) were synthesized via a typical polyol method with the synergistic effect of Cl−, Br−, and Fe3+ mediated agents. The synergistic impact of these mediated agents was investigated intensively, revealing that trace Fe3+ ions provided selective etching and hindered the strong etching effect from Cl− and Br− ions. Controlling this synergy allowed the obtainment of highly uniform AgNWs with sub-30 nm diameter and an aspect ratio of over 3000. Transparent conductive films (TCFs) based on these AgNWs without any post-treatment showed a very low sheet resistance of 4.7 Ω sq−1, a low haze of 1.08% at a high optical transmittance of 95.2% (at 550 nm), and a high figure of merit (FOM) of 1210. TCFs exhibited a robust electrical performance with almost unchanged resistance after 2500 bending cycles. These excellent high-performance characteristics demonstrate the enormous potential of our AgNWs in the field of flexible and transparent materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

et al. 2020

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“…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%

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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“…Thinner diameter Ag NW formation can be achieved when high pressure is applied in an autoclave reactor, instead of the typical synthesis under atmospheric pressure. 25 Zhang, et al 37 reported a facile one-pot polyol method to synthesis Ag NWs by using KBr as a conucleant to NaCl with long reaction time. The aspect ratio is crucial for the opto-electric properties of Ag NWs.…”

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confidence: 99%

High-yield and rapid synthesis of ultrathin silver nanowires for low-haze transparent conductors

et al. 2017

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Sub 30 nm silver nanowire synthesized using KBr as co-nucleant through one-pot polyol method for optoelectronic applications

Cited by 56 publications

References 28 publications

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

Ultra-Uniform and Very Thin Ag Nanowires Synthesized via the Synergy of Cl−, Br− and Fe3+ for Transparent Conductive Films

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

High-yield and rapid synthesis of ultrathin silver nanowires for low-haze transparent conductors

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