Simple hydrothermal synthesis of very-long and thin silver nanowires and their application in high quality transparent electrodes

Bari, Bushra; Lee, Sung Yong; Jang, Taehee; Won, Phillip; Ko, Seung Hwan; Alamgir, Khalid; Arshad, Muhammad; Guo, L. Jay

doi:10.1039/c6ta03308c

Cited by 174 publications

(118 citation statements)

References 53 publications

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“…In fact, the d-values perfectly matched to PDF Number 04-0783 (Silver-3C, syn); also the intensity of the peaks corresponded, except for (111). In the card 04-0783, the (111)/(200) intensity ratio is 2.5, whereas in our pattern was 3.4 indicating the formation of well-elongated AgNWs [25,26]. Minimal trace impurity of AgCl (PDF No.…”

Section: Synthesis and Physicochemical Characterization Of Silver Nancontrasting

confidence: 55%

Sustained Release from Injectable Composite Gels Loaded with Silver Nanowires Designed to Combat Bacterial Resistance in Bone Regeneration Applications

Mori¹,

Hafidh²,

Mele³

et al. 2019

Preprint

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One-dimensional nanostructures such as silver nanowires (AgNWs) have attracted considerable attention owing to their outstanding electrical, thermal and antimicrobial properties; however, their application in the prevention of infections linked to bone tissue regeneration interventions has not yet been explored. Here we report on the development of an innovative scaffold prepared from chitosan, composite hydroxyapatite and AgNWs (CS-HACS-AgNWs) having both bioactive and antibacterial properties. In vitro results highlighted the antibacterial potential of AgNWs against both gram-positive and gram-negative bacteria. The CS-HACS-AgNWs composite scaffold demonstrated suitable Ca/P deposition, improved gel strength, reduced gelation time, and sustained Ag + release within therapeutic concentrations. Antibacterial studies showed that the composite formulation was capable of inhibiting bacterial growth in suspension and of completely preventing biofilm formation on the scaffold in the presence of resistant strains. The hydrogels were also shown to be biocompatible, allowing cell proliferation. In summary, the developed CS-HACS-AgNWs composite hydrogels demonstrated significant potential as a scaffold material to be employed in bone regenerative medicine, as they present enhanced mechanical strength combined with the ability to allow calcium salts deposition, while efficiently decreasing the risk of infections. The results presented justify further investigations into potential clinical applications of these materials.to the bulk materials due to their reduced dimensions, controlled structure and large surface-tovolume ratio [3].One, two, and three-dimensional silver nanostructures have been previously reported, with many studies focusing on silver nanowires (AgNWs). AgNWs are anisotropically grown to obtain an aspect ratio higher than 10 and are typically 10-200 nm in diameter and 5-100 µm in length [2]. To date, silver nanoparticles (AgNPs) have been much more extensively studied than AgNWs, and their distinctive high thermal and electrical conductivity, surface-enhanced Raman scattering, chemical stability, catalytic activity and non-linear optical behavior have been highlighted; as well as their antibacterial activity that has extended their usage into several biomedical fields [4]. They are promising agents against a wide range of fungi, viruses and bacterial species; even though the mechanism of action is still not entirely understood, it is believed that nanosilver serves as a source for Ag + ions that can rupture microbial cell walls, denature proteins, block cell respiration and eventually induce cell death [5]. AgNPs have been used as antimicrobial agents in wound dressing [6], coating of catheters [7] and of cardiovascular implants [8], bone cements [9] and dental materials [10]. Currently literature on biomedical applications of AgNWs is still limited [2]; emerging applications include textiles [11], wound coatings [12], drug release and tissue regeneration [13].In this work, we explore for the first time the...

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Section: Synthesis and Physicochemical Characterization Of Silver Nancontrasting

confidence: 55%

Sustained Release from Injectable Composite Gels Loaded with Silver Nanowires Designed to Combat Bacterial Resistance in Bone Regeneration Applications

Mori¹,

Hafidh²,

Mele³

et al. 2019

Preprint

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“…The toxicity of the two types of AgNWs was tested against three cell lines: osteoblasts (hFOB 1. 19), human foreskin fibroblasts (Hs27) and Caco-2 cells ( Figure 6A-F). These cell lines were chosen to mimic three possible routes of exposure such as the application of treatments to bone, skin and the digestive system, respectively [28].…”

Section: Cytotoxicity Studiesmentioning

confidence: 99%

“…Moreover, the internalization, cytotoxicity and possible mechanisms of action of AgNWs against human osteoblasts (hFOB 1. 19), human skin fibroblasts (Hs27) and human colorectal adenocarcinoma (Caco-2) were studied in order to assess future potential applications such as inclusion in bone implants or in wound dressings for skin and mucosa.…”

Section: Introductionmentioning

confidence: 99%

“…) corresponds to the structure of metallic silver; in particular, the sharp peaks at 2θ values of 38.1 • , 44.3 • , 64.4 • and 77.3 • refer to the reticular planes (111), (200), (220) and (311), and are typical of AgNWs[18]. Furthermore, the (111)/(200) peak ratio was 3.7, indicating the formation of well-elongated AgNWs[19]. Minimal trace impurity of AgCl can be seen at a 2θ value of 32.1 • and 46.2 •[20].…”

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confidence: 96%

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Evaluation of Antibacterial and Cytotoxicity Properties of Silver Nanowires and Their Composites with Carbon Nanotubes for Biomedical Applications

Mori

Jones

Cretella

et al. 2020

IJMS

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In this work, we prepared silver nanowires (AgNWs) via the polyol method in the presence or absence of single wall carbon nanotubes (CNTs) and tested their physicochemical, antibacterial and cytotoxic properties. Results showed that the introduction of CNTs lead to the formation of AgNWs at lower temperature, but the final product characteristics of AgNWs and AgNWs-CNT were not significantly different. AgNWs exhibited antibacterial properties against all the studied bacterial species via the formation of oxygen reactive species (ROS) and membrane damage. Furthermore, AgNWs exhibited a dose-dependent and time-dependent toxicity at concentrations ≥ 10 µg/mL. Fibroblasts appeared to be more resistant than human colorectal adenocarcinoma (Caco-2) and osteoblasts to the toxicity of AgNWs. The cytotoxicity of AgNWs was found to be related to the formation of ROS, but not to membrane damage. Overall, these results suggest that AgNWs are potential antibacterial agents against E. coli, S. aureus, MRSA and S. saprophyticus, but their dosage needs to be adjusted according to the route of administration.

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“…As a predeposition treatment, the as-synthesized wires are usually centrifuged 1-3 times in acetone and subsequently in either ethanol or water to remove EG and PVP [6,33,42]. As a postdeposition treatment, methods such as thermal sintering [56][57][58], photonic sintering [59][60][61], immersion in water [38], applying a conductive coating such as PEDOT:PSS [62][63][64], selective growth of silver nanoparticles at the AgNW junctions [65], and cold welding by applying a mechanical pressure [38,52,66] have been reported. The performance of a TCE is conventionally assessed by looking to the transmittance of the electrode at a wavelength of 550 nm and the sheet resistance.…”

Section: Fabrication Of Transparent Conducting Films and Posttreatmentsmentioning

confidence: 99%

Comprehensive Synthesis Study of Well-Dispersed and Solution-Processed Metal Nanowires for Transparent Heaters

Bobinger

Dergianlis

Becherer

et al. 2018

Journal of Nanomaterials

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We review and extend the numerous polyol-based synthesis protocols and postdeposition treatments that have been reported for silver nanowires (AgNWs). After tailoring substantial process parameters such as the process time, temperature as well as the stirring speed, the polyvinylpyrrolidone (PVP) to silver nitrate (AgNO 3 ) ratio, and the type of PVP, a high mean aspect ratio of 800 could be achieved. Interestingly, the addition of a small portion of potassium chloride (KCl) not only leads to a reduction in diameter but also extremely enhances the nanowire dispersion and its stability. This effect is attributed to the role of KCl, which, along with PVP, acts as a cocapping agent. Furthermore, sprayed AgNW and copper nanowire (CuNW) films were tested as transparent heaters. The AgNWs could be operated at a power density of at least 0.72 W/cm 2 , which corresponds to a temperature of 213 ∘ C, whereas the CuNWs failed at a power density and temperature of 0.4 W/cm 2 and 150 ∘ C, respectively. Interestingly, the degradation of AgNWs shows a step-wise behavior and is mainly dominated by fragmentation, while the CuNWs are gradually oxidized.

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Simple hydrothermal synthesis of very-long and thin silver nanowires and their application in high quality transparent electrodes

Abstract: Well dispersed very long and thin silver nanowires are synthesized using glucose as a reducing agent and silver chloride as a silver source. The wire lengths are in the range of 200 to 500 microns with an average diameter of 45–65 nm.

Cited by 174 publications

References 53 publications

Sustained Release from Injectable Composite Gels Loaded with Silver Nanowires Designed to Combat Bacterial Resistance in Bone Regeneration Applications

Sustained Release from Injectable Composite Gels Loaded with Silver Nanowires Designed to Combat Bacterial Resistance in Bone Regeneration Applications

Evaluation of Antibacterial and Cytotoxicity Properties of Silver Nanowires and Their Composites with Carbon Nanotubes for Biomedical Applications

Comprehensive Synthesis Study of Well-Dispersed and Solution-Processed Metal Nanowires for Transparent Heaters

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